Skip to main content
checkweather.io
Every US forecast, compared
CheckWeather US›Great Falls

Great Falls weather

Loading live data…

The weather map: all three models at once

NWS, American, European side by side around Great Falls and nearby towns.Live rain radar →
Loading the three model maps…

Next 14 hours

consensus of the three models

7-day forecast

where the models agree, and where they split

Great Falls, MT is at its warmest in Jul (average highs near 86°F) and coldest in Jan (lows around 20°F), with roughly 16 in of precipitation across the year. Below, compare what NWS, American, European forecast for Great Falls right now, and see exactly where they disagree.

Great Falls climate by month

average daytime high and overnight low across a typical year
Jan
34°
20°
Feb
36°
21°
Mar
40°
22°
Apr
54°
34°
May
65°
45°
Jun
72°
51°
Jul
86°
60°
Aug
82°
58°
Sep
75°
53°
Oct
60°
40°
Nov
45°
30°
Dec
44°
30°

Which forecast is most accurate in the US?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
Behind Apple Weather, Windy
88
/100rank #1
85±1.5°F96±1.2 mph8592% hitECMWF — European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
Behind Windy & many free apps
74
/100rank #2
82±1.8°F92±2.6 mph5374% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 40 cities. Lower error means a higher score. The apps you know (AccuWeather, Apple Weather, The Weather Channel) are built on these models.

Common questions

What's the weather in Great Falls today?
On this page we show what NWS, American, European each forecast for Great Falls today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Great Falls today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Great Falls and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Great Falls?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Great Falls forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Great Falls?
July is typically the warmest month in Great Falls, with average highs around 86°F.
How cold does Great Falls get?
The coldest month in Great Falls is January, when overnight lows average about 20°F.
How much rain does Great Falls get?
Great Falls sees roughly 16 in of precipitation a year, with May usually the wettest month.

The forecasts Americans check

The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.

NWSNational Weather Service
Open model · shown above ✓AWAccuWeather
Closed model · open ↗↗TWCThe Weather Channel
Closed model · open ↗↗

Nearby

Helena Valley SoutheastHelena Valley West CentralHelenaLewistownHavreButteBelgradeAnaconda

More US weather

Most accurate forecastUS rain radarAll US citiesHoliday weather abroadThe national forecast models, explained: NBM, UKMO, GEM and ACCESSSuper El Nino and ENSO in 2026: What It Really Means for Your Forecast