Harrison, Montana Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Harrison weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Clear——86°47°—
- SundayJul 5Overcast28%—88°61°+2°
- MondayJul 6Showers63%0.08″74°56°-14°
- TuesdayJul 7Overcast63%—83°52°+9°
- WednesdayJul 8Drizzle27%—87°56°+4°
- ThursdayJul 9Clear25%—84°52°-3°
- FridayJul 10Clear——87°55°+3°
AQI 48 (Good), driven by Ozone. AQI up 19 in the last 6 hours — air quality is degrading. Ozone at AQI 43 now. With UV 0.2 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 0.2 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 around 1 PM.
- Present
- AQI 43
- UV peak
- 0.2 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 7
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
- 11:51 PM
- Moonset
- 11:41 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Harrison at a glance
- Today vs. normal: 18°F above the seasonal normal for this latitude
- Last frost: May 20 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 59735
16-Day Forecast — Harrison
- Sat86°47°1%
- Sun88°60°28%
- Mon74°56°63%
- Tue83°52°63%
- Wed87°56°27%
- Thu84°52°25%
- Fri87°55°3%
- Sat98°60°3%
- Sun100°67°5%
- Mon99°67°11%
- Tue98°67°21%
- Wed103°64°21%
- Thu101°65°24%
- Fri100°62°21%
- Sat97°66°30%
- Sun91°61°32%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Harrison
SPC has placed Harrison in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Harrison
- 59735