Helena, Montana Weather
Monsoon storms drench the south. Day 14 of summer. Read this microseason across nine climate regions →
Helena weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——86°55°—
- SundayJul 5Overcast28%—87°60°+1°
- MondayJul 6Showers55%0.20″76°58°-11°
- TuesdayJul 7Heavy Drizzle55%0.05″86°55°+10°
- WednesdayJul 8Overcast28%—90°59°+4°
- ThursdayJul 9Clear15%—82°59°-8°
- FridayJul 10Clear——87°54°+5°
AQI 37 (Good), driven by Ozone. AQI down 6 over the last 6 hours (gradual decline).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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
- 11:35 PM
- Moonset
- 10:30 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Helena at a glance
- Today vs. normal: 5°F below the seasonal normal for this latitude
- Last frost: May 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 59601, 59602, 59623, 59625
15-Day Forecast — Helena
- Sat86°55°3%
- Sun87°60°28%
- Mon76°58°55%
- Tue86°55°55%
- Wed90°59°28%
- Thu82°59°15%
- Fri87°54°5%
- Sat99°59°4%
- Sun82°59°7%
- Mon91°55°11%
- Tue100°62°13%
- Wed90°66°18%
- Thu98°65°19%
- Fri99°65°17%
- Sat96°66°21%
Forecast data from Open-Meteo (CC BY 4.0).
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.
SPC Convective Outlook
Storm Prediction Center — Helena
SPC includes Helena in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 Helena
- 59601
- 59602
- 59625
- 59623
- 59624
- 59626