Great Falls, MT
NATIONAL WEATHER SERVICE FORECAST OFFICE
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Wind Chill Wind Temperature (F) 0 35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 5 32 27 22 16 11 6 0 -5 -10 -15 -21 -26 -31 -36 -42 -47 -52 10 22 16 10 3 -3 -9 -15 -22 -27 -34 -40 -46 -52 -58 -64 -71 -77 15 16 9 2 -5 -11 -18 -25 -31 -38 -45 -51 -58 -65 -72 -78 -85 -92 20 12 4 -3 -10 -17 -24 -31 -39 -46 -53 -60 -67 -74 -81 -88 -95 -103 25 8 1 -7 -15 -22 -29 -36 -44 -51 -59 -66 -74 -81 -88 -96 -103 -110 30 6 -2 -10 -18 -25 -33 -41 -49 -56 -64 -71 -79 -86 -93 -101 -109 -116 35 4 -4 -12 -20 -27 -35 -43 -52 -58 -67 -74 -82 -89 -97 -105 -113 -120 40 3 -5 -13 -21 -29 -37 -45 -53 -60 -69 -76 -84 -92 -100 -107 -115 -123 45 2 -6 -14 -22 -30 -38 -46 -54 -62 -70 -78 -85 -93 -102 -109 -117 -125 +20 to -19 Work outside becomes unpleasant. Hats, coats, and gloves are needed. -20 to -34 Work outside becomes more hazardous. Heavy outer clothing is needed. -35 to -49 Frostbite can occur with prolonged exposure. Heavy outer clothing is essential. -50 to -79 Frostbite can occur within a minute. Face protection is important. Multiple layers of clothing are essential. -80 to -99 Frostbite can occur in 30 to 60 seconds. Face protection is essential. Work outside is dangerous. < -99 Frostbite occurs in less than 30 seconds. People working outside will become easily fatigued. Outdoor work or travel is very dangerous. In no way do the links contained on these pages constitute an endorsement by the National Weather Service of those sites or vendors.  The National Weather Service is not responsible for the timeliness or availability of products over the internet. Montana | U.S. | Almanac | Search | Home This web page created by the: National Weather Service Forecast Office 5324 Tri-Hill Frontage Road Great Falls, MT 59405-4933 w-gtf.webmaster@noaa.gov