Great Falls, Virginia Weather
Queen Anne's lace lines the roads. Day 16 of summer. Read this microseason across nine climate regions →
Great Falls weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Light Drizzle52%—96°73°—
- MondayJul 6Drizzle44%0.07″89°73°-7°
- TuesdayJul 7Light Showers54%—81°70°-8°
- WednesdayJul 8Heavy Drizzle44%0.02″80°67°-1°
- ThursdayJul 9Showers61%0.35″90°69°+10°
- FridayJul 10Light Drizzle42%0.02″88°68°-2°
- SaturdayJul 11Light Drizzle22%—86°69°-2°
AQI 118 (Unhealthy for Sensitive Groups), driven by PM2.5. AQI down 20 over the last 6 hours — air quality is improving sharply. PM scrubbed by 2 hours of recent rain — PM2.5 down to 20.1 µg/m³, PM10 to 20.7 µg/m³.
CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 38. Overcast through the UV peak window (cloud cover ~77%) — afternoon ozone should stay flat.
- Present
- AQI 38
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 20.1 µg/m³, PM10 to 20.7 µg/m³.
- PM2.5/PM10
- 0.97
- Wind
- light
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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).
When the stars begin to huddle, the earth will soon become a puddle.
- Moonrise
- 11:49 PM
- Moonset
- 12:26 PM
- In sign
- ♓︎ Pisces
Queen Anne's lace lines the roads
Great Falls at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jul 6–10
- Planting window: Sow fall broccoli and cabbage indoors for transplant in 4 weeks.
ZIP code: 22066
16-Day Forecast — Great Falls
- Sun96°73°52%
- Mon91°72°44%
- Tue81°70°54%
- Wed80°67°44%
- Thu90°69°61%
- Fri88°68°42%
- Sat86°69°22%
- Sun87°70°24%
- Mon93°70°24%
- Tue92°73°15%
- Wed83°62°15%
- Thu80°60°38%
- Fri86°65°42%
- Sat70°66°27%
- Sun80°64°26%
- Mon82°67°22%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 6, 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.
SPC Convective Outlook
Storm Prediction Center — Great Falls
SPC has placed Great Falls in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Great Falls
- 22066
- 22102