St. Marie, Montana Weather
Pikas hayfeeding in granite peaks. Day 76 of spring. Read this microseason across nine climate regions →
St. Marie weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——65°49°—
- ThursdayJun 4Drizzle19%0.03″67°47°+2°
- FridayJun 5Overcast——76°50°+9°
- SaturdayJun 6Light Drizzle50%—91°61°+15°
- SundayJun 7Light Drizzle50%—67°53°-24°
- MondayJun 8Overcast22%—75°52°+8°
- TuesdayJun 9Light Drizzle29%0.01″74°58°-1°
Ozone at AQI 30 — peak already passed at 1 PM under overcast skies. AQI flat over the last 6 hours (within ±4 points). Levels should ease through evening.
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 30 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 30
- UV peak
- 3.4 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 30
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).
The higher the clouds, the finer the weather.
- Moonrise
- 5:38 AM
- Moonset
- 1:30 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
St. Marie at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: June 5 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Warm-season window is open
As of June 3, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
SPC Convective Outlook
Storm Prediction Center — St. Marie
SPC has placed St. Marie in the General Thunderstorms category for severe thunderstorms tomorrow.
- 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.