Big Stone Colony, Montana Weather
Pikas hayfeeding in granite peaks. Day 78 of spring. Read this microseason across nine climate regions →
Big Stone Colony weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast21%—72°52°—
- FridayJun 5Overcast——75°50°+3°
- SaturdayJun 6Light Showers28%0.02″72°51°-3°
- SundayJun 7Light Showers46%0.16″57°43°-15°
- MondayJun 8Light Drizzle20%0.03″71°43°+14°
- TuesdayJun 9Light Drizzle44%0.06″65°49°-6°
- WednesdayJun 10Light Drizzle55%0.04″64°52°-1°
Ozone at AQI 41 now. AQI up 15 in the last 6 hours — air quality is degrading. With UV 0.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.
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 41 now. With UV 0.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.
- Present
- AQI 41
- UV peak
- 0.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 5.3 µg/m³, PM10 at 6.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 6:49 AM
- Moonset
- 4:15 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
Big Stone Colony at a glance
- Today vs. normal: 66°F — typical for the season
- Last frost: May 30 (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 5, 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 — Big Stone Colony
SPC has placed Big Stone Colony in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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.