St. Marie, Montana Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
St. Marie weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Clear——83°52°—
- SundayJul 5Overcast——86°61°+3°
- MondayJul 6Overcast——81°57°-5°
- TuesdayJul 7Light Showers61%0.24″70°56°-11°
- WednesdayJul 8Showers34%0.02″81°54°+11°
- ThursdayJul 9Overcast33%—76°61°-5°
- FridayJul 10Mostly Clear——76°55°0°
AQI 40 (Good), driven by Ozone. AQI up 10 over the last 6 hours (gradual rise). Ozone at AQI 34 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 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 34 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
- Present
- AQI 34
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 8
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
- 11:32 PM
- Moonset
- 11:18 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
St. Marie at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: June 5 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — St. Marie
- Sat83°52°2%
- Sun86°61°8%
- Mon81°57°7%
- Tue70°56°61%
- Wed81°54°34%
- Thu76°61°33%
- Fri76°55°3%
- Sat94°60°3%
- Sun92°73°4%
- Mon92°68°8%
- Tue99°70°11%
- Wed97°76°17%
- Thu87°67°19%
- Fri87°59°10%
- Sat87°65°11%
- Sun83°59°6%
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 — St. Marie
SPC includes St. Marie 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 St. Marie
- 59230
- 59231