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Historical Bloomsday Weather
Historical Bloomsday Weather

Data compiled by the National Weather Service in Spokane. All times are PDT. All data recorded at the Spokane Airport. Temperature, Humdity, and Wind are observations at the given hour. Sunshine is the total number of hours of sunshine that day, followed by the percent of total possible sunshine.

 

May 1, 1977
Time Temperature Humidity Wind Sunshine
8:00 AM
59
36%
NE 10 mph  
11:00 AM
70
29%
NE 13 mph 12.0 Hours - 82%
2:00 PM
78
26%
E 7 mph  
         
Weather on the innagural Bloomsday Run was rather warm for early May. Temperatures quickly climbed into the 70s under high thin clouds. The high reached 81 that day. Thunderstorms rolled through the area later that evening.

 

May 7, 1978
Time Temperature Humidity Wind Sunshine
8:00 AM
48
68%
NE 5 mph  
11:00 AM
58
42%
NW 8mph 14.0 Hours - 95%
2:00 PM
67
20%
NE 23 mph  
         
The weather was considerably cooler for the 2nd installment of the Bloomsday Run. Skies were sunny with just some thin high clouds. The temperature reached 69 for the maximum reading that day.

 

May 6, 1979
Time Temperature Humidity Wind Sunshine
8:00 AM
42
83%
SW 16 mph  
11:00 AM

52

61%
SW 19 mph 12.0 hours - 82%
2:00 PM
54
53%
SW 17 mph  
         
After an all-day rain on Saturday, skies cleared and the weather was cool and dry for the race. The high temperature was only 57.

 

May 4, 1980
Time Temperature Humidity Wind Sunshine
8:00 AM
55
72%
NE 6 mph  
11:00 AM

67

53%
NE 8 mph 14.6 Hours - 100%
2:00 PM
78
38%
NE 9 mph  
         
Weather for the fourth year of the race was nearly identical to the opening year in 1977. Abundant sunshine and very warm temperatures greeted the runners. The high temperature was 81, tying it with 1977 as the warmest Bloomsday ever.

 

May 3, 1981
Time Temperature Humidity Wind Sunshine
8:00 AM
41
76%
S 9 mph  
11:00 AM

52

55%
SW 10 mph 6.0 Hours - 41%
2:00 PM
54
49%
SE 9 mph  
         
After the very warm weather for the previous year's race, this year was quite a marked change. Skies were mostly cloudy and there was even a light rain shower at 1:00 pm which lasted only 10 minutes. The high temperature for the day was 59.

 

May 2, 1982
Time Temperature Humidity Wind Sunshine
8:00 AM
51
64%
SE 9 mph  
11:00 AM

61

41%
SW 13 mph 9.4 Hours - 85%
2:00 PM
62
40%
SW 16 mph  
         
Skies were sunny at the start of the race. High clouds increased during the day and skies were mostly cloudy by noon. The maximum temperature was 62.

 

May 1, 1983
Time Temperature Humidity Wind Sunshine
8:00 AM
47
80%
N 4 mph  
11:00 AM

57

51%
NE 5 mph 12.9 hours - 89%
2:00 PM
64
38%
NW 8 mph  
         
There was plenty of sunshine for the 1983 race. Only a few fair weather cumulus developed in the afternoon. The high temperature reached 67 degrees.

 

May 6, 1984
Time Temperature Humidity Wind Sunshine
8:00 AM
37
89%
S 8 mph  
11:00 AM

36

89%
S 8 mph 1.7 hours - 12%
2:00 PM
42
76%
SW 6 mph  
         
Light rain started around 4 am, but this quickly changed to a wet snow which continued until 8 am before changing back to rain. Officially there was 0.8" of snow measured at the Spokane Airport, but 1-2" of snow was reported in some areas. Felts Field (near downtown Spokane) reported a rain/snow mix around 5 am but temperatures were around 38 there so there wasn't any accumulation. The high temperature that day was only 47, tying it with 1999 as the coldest Bloomsday.

 

May 5, 1985
Time Temperature Humidity Wind Sunshine
8:00 AM
38
79%
S 9 mph  
11:00 AM

49

52%
S 7 mph 12.8 hours - 88%
2:00 PM
54
36%
E 5 mph  
         
Clear skies allowed the morning temperature to drop all the way to 31 degrees. High clouds moved in shortly after sunrise as temperatures warmed into the 50s. The high temperature for the day was 58 degrees.

 

May 4, 1986
Time Temperature Humidity Wind Sunshine
8:00 AM
45
79%
SW 7 mph  
11:00 AM

52

63%
SW 15 mph 8.1 hours - 56%
2:00 PM
55
47%
SW 17 mph  
         
After some pre-dawn light rain, skies cleared a bit during the morning hours as temperatures warmed into the 50s. The high temperature was 58 degrees for the day.

 

May 3, 1987
Time Temperature Humidity Wind Sunshine
8:00 AM
46
86%
S 10 mph  
11:00 AM

53

54%
SW 13 mph 8.1 hours - 56%
2:00 PM
57
47%
SE 10 mph  
         
Skies cleared just in time for the start of the race but quickly clouded up again before noon. The high temperature was 62.

 

May 1, 1988
Time Temperature Humidity Wind Sunshine
8:00 AM
34
79%
SE 9 mph  
11:00 AM

45

56%
SW 12 mph 12.3 hours - 85%
2:00 PM
51
30%
SW 15 mph  
         
Very light snow had ended by 7:40 am and skies were partly cloudy by 8:00 am. The skies remained partly sunny in the morning and clouds began to increase again in the afternoon. The high temperature was 55.

 

May 7, 1989
Time Temperature Humidity Wind Sunshine
8:00 AM
58
87%
S 5 mph  
11:00 AM

67

59%
S 8 mph 12.8 hours - 86%
2:00 PM
73
44%
SW 9 mph  
         
After some light rain overnight, skies cleared by morning allowing temperatures to warm quickly into the 60s and lower 70s. The high temperature for the day was 76 degrees.

May 6, 1990
Time Temperature Humidity Wind Sunshine
8:00 AM
46
39%
SW 12G29 mph  
11:00 AM

50

28%
SW 20G31 mph 12.5 hours - 86%
2:00 PM
54
28%
SW 22G31 mph  
         
Although skies were mostly sunny, it was very windy with a peak gust of 46 mph at 6:27 pm. Winds were gusting to around 30 mph throughout the race. A few light rain showers fell during the afternoon as the high reached 60 degrees.

 

May 5, 1991
Time Temperature Humidity Wind Sunshine
8:00 AM
48
60%
S 11 mph  
11:00 AM

57

45%
S 13 mph 2.2 hours - 15%
2:00 PM
52
73%
SE 11 mph  
         
Clouds increased throughout the day leading to some very light rain showers around 1:00 pm. The high temperature was 57 degrees.

 

May 3, 1992
Time Temperature Humidity Wind Sunshine
8:00 AM
49
68%
NE 11 mph  
11:00 AM

65

41%
E 9 mph 14 hours - 100%
2:00 PM
75
22%
NE 4 mph  
         
It was a sunny day with a high temperature of 78.

 

May 2, 1993
Time Temperature Humidity Wind Sunshine
8:00 AM
44
82%
S 15 mph  
11:00 AM

51

58%
SW 13 mph 12.5 hours - 86%
2:00 PM
57
41%
W 17 mph  
         
A breezy and partly sunny day. By the afternoon the wind was gusting to 26 mph with a high temperature of 57 degrees.

 

May 1, 1994
Time Temperature Humidity Wind Sunshine
8:00 AM
41
79%
S 11 mph  
11:00 AM

53

42%
W 16 mph 12 hours - 83%
2:00 PM
59
29%
SW 8 mph  
         
Just about ideal running conditions for 1994. A cool and sunny start to the race. Temperatures warmed into the 50s by mid morning with a high temperature of 59 for the day.

 

May 7, 1995
Time Temperature Humidity Wind Sunshine
8:00 AM
52
68%
NE 8 mph  
11:00 AM

58

47%
E 16 mph 8.2 hours 55%
2:00 PM
61
45%
NE 8 mph  
         
Skies were overcast with a few sprinkles at the start of the race. The temperature warmed to a high of 66.

 

May 5, 1996
Time Temperature Humidity Wind Sunshine
8:00 AM
40
79%
NE 8 mph  
11:00 AM

52

45%
NE 6 mph Missing
2:00 PM
56
34%
Calm  
         
It was sunny throughout the race, with a few clouds forming by mid-afternoon. The high that day was 58 degrees.

 

May 4, 1997
Time Temperature Humidity Wind Sunshine
8:00 AM
44
90%
SW 13 mph  
11:00 AM

50

74%
S 15 mph 7.5 Hours - 51%
2:00 PM
58
49%
SW 15 mph  
         
Light rain fell through most of the night, ending around sunrise. Skies remained overcast until mid-afternoon, when the high of 60 degrees was reached.

 

May 3, 1998
Time Temperature Humidity Wind Sunshine
8:00 AM
57
72%
S 15 mph  
11:00 AM

66

56%
SW 10 mph 13 Hours - 92%
2:00 PM
71
47%
SW 9 mph  
         
It was the warmest Bloomsday since 1992 as the temperature reached 74 degrees in the afternoon. Skies were mostly cloudy at the start of the race but dissipated by midday.

 

May 2, 1999
Time Temperature Humidity Wind Sunshine
8:00 AM
39
89%
SW 12 mph  
11:00 AM

41

89%
SW 14 mph 8.8 Hours - 61%
2:00 PM
43
86%
SW 24 mph  
         
Skies were cloudy with rain falling off and on throughout the race. There were some brief sun breaks at midday and clearing skies late in the afternoon. 0.07" of rain fell between 8 am and 2 pm. The high temperature was only 47 degrees, tying it with 1984 as the coldest Bloomsday.

 

May 7, 2000
Time Temperature Humidity Wind Sunshine
8:00 AM
40
76%
NE 8 mph  
11:00 AM

51

50%
Calm 13.3 Hours - 91%
2:00 PM
56
31%
W 8 mph  
         
Skies were sunny at the start of the race, with only a few clouds developing by midday. The high temperature for the day was 59 degrees.

 

May 6, 2001
Time Temperature Humidity Wind Sunshine
8:00 AM
38
62%
SE 8 mph  
11:00 AM

50

44%
SE 6 mph 14.3 Hours - 98%
2:00 PM
55
34%
SW 7 mph  
         
Sunny skies with a high temperature of 57 degrees.

 

May 5, 2002
Time Temperature Humidity Wind Sunshine
8:00 AM
41
65%
S 15 mph  
11:00 AM

46

65%
S 18 mph 8.4 Hours - 57%
2:00 PM
43
73%
Calm  
         
Skies were mostly cloudy with mid/high clouds at the beginning of the race. Light rain began at 9:48 am and mixed with small hail at 10:30 am and between 1:00 - 1:30 pm. A thunderstorm with small hail at 2:00 pm dropped the temperature back into the lower 40s. 0.07" of precipitation fell during the race. The high temperature for the day was 51 degrees. Total precipitation for the day was 0.28", and 0.4" of snow/graupel.

 

May 4, 2003
Time Temperature Humidity Wind Sunshine
8:00 AM
43
76%
S 13 mph  
11:00 AM

48

63%
S 13 mph 7.2 Hours - 49%
2:00 PM
49
62
W 15G20 mph  
         
Skies were mostly cloudy with mid-clouds as the participants lined up to start. The clouds lowered and intermittent light rain began at 8:36 am and continued through the day. The high temperature for the day was only 52 degrees with a total of 0.02" rainfall.

 

May 2, 2004
Time Temperature Humidity Wind Sunshine
8:00 AM
57
59%
S 14 mph  
11:00 AM

67

45%
SW 13 mph 13.5 Hours - 93%
2:00 PM
74
32%
SW 16G26 mph  
         
After the previous two Bloomsdays were wet, folks were ready for a change. Breezy winds overnight kept the temperatures mild. The 57 degrees at 8:00 am was only 2 degrees shy of the warmest Bloomsday morning, set on the first Bloomsday in 1977. High clouds covered the skies at the start of the race, but gave way to some sunshine as the race progressed. The high temperature was 76 degrees.

 

May 1, 2005
Time Temperature Humidity Wind Sunshine
8:00 AM
46
62%
NE 10 mph  
11:00 AM

58

28%
NE 12 mph 13.6 Hours - 94%
2:00 PM
64
27%
N 6 mph  
         
Beautiful weather was in store for the Bloomsday participants. Aside from thin high clouds, there was abundant sunshine. Temperatures in the morning were cool but not cold, and warmed slowly through the day. The high temperature was 67 degrees.

 

May 7, 2006
Time Temperature Humidity Wind Sunshine
8:00 AM
47
68%
S 10 mph  
11:00 AM

48

73%
SW 17 mph 0.9 Hours - 6%
2:00 PM
48
73%
SW 18 mph  
         
Skies were overcast as a weak Pacific storm moved through the area. Light rain showers fell off and on during the race, but were generally so light that the pavement remained dry. The high temperature for the day was only 53 degrees.

 

May 6, 2007
Time Temperature Humidity Wind Sunshine
8:00 AM
43
60%
S 8 mph  
11:00 AM

54

45%
SW 12 mph 10.3 Hours - 70%
2:00 PM
59
39%
SW 9 mph  
         
Weather conditions were just about perfect for the 2007 Bloomsday run. Temperatures started cool but warmed into the 50s during the middle of the day. High clouds allowed filtered sunshine all day. The high temperature for the day reached 66 degrees.

 

May 4, 2008
Time Temperature Humidity Wind Sunshine
8:00 AM
43
73%
E 3 mph  
11:00 AM

58

51%
N 3 mph 12.9 Hours - 88%
2:00 PM
65
33%
W 3 mph  
         

A few thin high clouds moved over the region from day break through start time and into the afternoon. The sky cover ranged from clear to partly cloudy. The winds were light through the day and the high temperature was 69 degrees.

 

May 3, 2009
Time Temperature Humidity Wind Sunshine
8:00 AM
44
85%
S 9 mph  
11:00 AM

48

68%
S 10 mph 7.2 Hours - 49%
2:00 PM
52
50%
SW 15 mph  
         

Skies were mostly cloudy throughout the race, with some sun breaks by midday. The winds were somewhat breezy making for a chilly start to the race. The high temperature reached only 55 degrees.

 

May 2, 2010
Time Temperature Humidity Wind Sunshine
8:00 AM
39
76%
S 10 mph  
11:00 AM

50

56%
SW 15 mph 12.2 Hours - 84%
2:00 PM
54
41%
SW 18 mph  
         

After a cool but mostly sunny start to the race, clouds continued to roll in during the afternoon while winds increased, gusting to around 30 mph. The high temperature for the day was 57 degrees.

 

May 1, 2011
Time Temperature Humidity Wind Sunshine
8:00 AM
37
78%
SE 8 mph  
11:00 AM

49

52%
SW 8 mph 12.5 Hours - 86%
2:00 PM
55
38%
SW 7 mph  
         

Bloomsday weather for 2011 was almost a carbon-copy of the previous year. After a morning low of 32 degrees, the temperature gradually warmed to 58 by the afternoon under mostly sunny skies.

 

May 6, 2012
Time Temperature Humidity Wind Sunshine
8:00 AM
41
65%
SE 5 mph  
11:00 AM

52

46%
SW 5 mph 13.0 Hours - 88%
2:00 PM
57
34%
SW 7 mph  
         

The 2012 Bloomsday was the third consecutive year of nearly identical and ideal weather conditions. The skies started off clear in the morning which allowed for a low temperature of 34 degrees. But the race was run with temperatures in the 40s and lower 50s and a light breeze. High clouds moved in by midday to filter the sunshine a bit.

 

May 5, 2013
Time Temperature Humidity Wind Sunshine
8:00 AM
56
52%
NE 5 mph
 
11:00 AM

69

39%
N 7 mph
13.6 Hours - 92%
2:00 PM
74
35%
NE 7 mph
 
 
     

Overall another pleasant Bloomsday run with temperatures starting out above normal and a gentle north breeze early in the morning. Clouds kicked in toward mid-morning to shelter the sun and the breezes also increased a bit. Temperatures quickly had risen into the mid 70s by mid-afternoon with clearing skies and mild temperatures going into the post-race period.

 

Bloomsday Extremes
Coldest Bloomsday 1984 and 1999
Warmest Bloomsday 1977 and 1980

Climatology (Based on 1971-2000)
Average High 63
Average Low 40
Sunrise 5:26 am PDT
Sunset 8:07 pm PDT
All-Time High 92 - May 5th, 1966
All-Time Low 24 - May 1st, 1954
Coldest High 42 - May 2nd, 1950
Warmest Low 57 - May 7th, 1947
Most Precipitation

0.75" - May 4, 1888

0.63" - May 2, 1995

Most Snowfall 0.8" - May 6, 1984

What are the possible weather extremes for Bloomsday?

The all time high for early May of 92 degrees (set on 5/5/92 ) suggests Bloomsday could be quite warm. Moderate to heavy rain on the preceding days could combine with warm temperatures to produce an unusual hot and muggy day.

The strongest wind recorded at Spokane International in May is 53 mph. Running against a strong breeze is not ideal. Steady winds and temperatures in the upper 20s or lower 30s would likely result in some discomfort among the tens of thousands out in the elements on Bloomsday.

The worst wind scenario would likely be dry conditions for the months and week preceding Bloomsday and steady southwest breezes of 30 plus mph combining for reduced visibilities and high levels of airborne particulates with blowing dust. Heavy rain is unlikely, but not impossible. Rainfall rates up to 1 inch per hour have occurred in the spring in Spokane . These conditions likely coupled with temperatures in the 30s and 40s would not be welcome in Spokane on the first Sunday in May.

Spring showers are common in Spokane during the first week of May. Many of the past Bloomsdays had light and intermittent showers. This type of activity is more likely in the afternoon, but can occur in the morning. Taking this type of weather to the extreme introduces hazards such as lightning, strong winds, hail and tornadoes. The small soft hail that occurs frequently in the spring has visited Bloomsday from time to time. Thunderstorms have also occurred on the first Sunday in May in Spokane . The occurrence of strong thunderstorm winds, large hail and tornadoes is very rare in Spokane , but cannot be completely ruled out during the more favored months of May and June.

Snowfall in May in Spokane is unusual, but not unheard of. Two of the past Bloomsdays (1984 and 2002) have had some snow or hail falling from the sky. The records at Spokane International show an extreme 3.5 inches of snow on May 11, 1967 . But the worst Bloomsday weather scenario nearly came to pass in May 2002. On Tuesday May 7, 2002 (two days after the race) about 20 miles west of the course, up to 19 inches of snow fell in a very unusual late season storm. This was not a high elevation mountain storm; it occurred across the 2500 foot elevation west plains areas of Davenport , Reardan and Airway Heights . This storm brought only ½ inch of snow to Spokane International and just a few flakes to the downtown area. Needless to say an event like this over the downtown area on the first Sunday in May would put a real damper on Bloomsday. 


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