When is the first freeze in Great Falls, MT?
NOAA's 1991-2020 climate normals for GREAT FALLS INTL AP, MT US put the middle date for the first fall freeze (32°F or colder) at about Sep 24. The middle date for the first hard freeze (28°F or colder) is about Oct 3.
NWS forecasts 24°F tonight, Oct 23 for ZIP 59401 (checked Oct 24, 12:45 AM MDT). Data: NOAA/NWS forecast for the center point of ZIP 59401, the same point ForecastBooked uses for that ZIP. Other parts of Great Falls can read a few degrees warmer or colder. ForecastBooked is not affiliated with or endorsed by NOAA/NWS.
| First fall freeze (32°F), middle date | Sep 24 |
|---|---|
| First hard freeze (28°F), middle date | Oct 3 |
| Last spring freeze (32°F), middle date | May 19 |
| Early first freeze (32°F), 1 year in 10 sooner | Sep 9 |
| Chance of a 32°F night in a year | 100% |
| Weather station | GREAT FALLS INTL AP, MT US (USW00024143) |
The middle date is NOAA's 50% date. In about half of years the first freeze comes sooner, and in half it comes later. One station can differ from nearby areas, mostly low or rural spots. Dates change each year, so check the latest National Weather Service forecast.
Running an HVAC or plumbing shop here? To get a fall tune-up email out before the first freeze in about 9 years out of 10, send it by Aug 26. Free tune-up email timer for 49 cities.
Freezing night coming? Check the NWS forecast for pipe-freeze risk by ZIP.
For HVAC and plumbing shops in Great Falls
ForecastBooked watches the NWS forecast for the ZIPs you serve. When the first freeze is really in the forecast, a ready-to-send email, text, Google post and social post for your customers appears on your kit page. Pro and up also get a graphic.
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NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020, annual/seasonal normals, station USW00024143: fields ANN-TMIN-PRBFST-T32FP50, ANN-TMIN-PRBFST-T32FP10, ANN-TMIN-PRBFST-T28FP50, ANN-TMIN-PRBLST-T32FP50, ANN-TMIN-PRBOCC-LSTH032. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/access/USW00024143.csv. ForecastBooked is not affiliated with or endorsed by NOAA.