Great Falls, Montana Weather
Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →
Great Falls weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——85°54°—
- SundayJul 5Light Drizzle——86°58°+1°
- MondayJul 6Light Showers49%0.07″75°54°-11°
- TuesdayJul 7Light Drizzle49%—81°57°+6°
- WednesdayJul 8Overcast21%—94°61°+13°
- ThursdayJul 9Partly Cloudy21%—82°61°-12°
- FridayJul 10Partly Cloudy——86°52°+4°
AQI 32 (Good), driven by PM2.5. AQI down 10 over the last 6 hours (gradual decline). PM2.5 at 4.5 µg/m³ (AQI 25) with a 0.83 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 4.5 µg/m³ (AQI 25) with a 0.83 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.83
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:33 PM
- Moonset
- 10:25 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Great Falls at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: May 31 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 59401, 59404, 59405
15-Day Forecast — Great Falls
- Sat85°55°2%
- Sun86°58°3%
- Mon75°54°49%
- Tue81°57°49%
- Wed94°61°21%
- Thu82°61°21%
- Fri86°52°6%
- Sat98°57°3%
- Sun81°63°7%
- Mon87°55°9%
- Tue100°61°13%
- Wed98°69°16%
- Thu92°67°18%
- Fri101°65°13%
- Sat101°70°9%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Great Falls
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
ZIP codes in Great Falls
- 59404
- 59401
- 59405
- 59406