St. Ignatius, Montana Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
St. Ignatius weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Drizzle41%0.04″70°54°—
- FridayJun 5Overcast——76°52°+6°
- SaturdayJun 6Overcast——60°49°-16°
- SundayJun 7Light Snow Shwrs34%0.09″56°41°-4°
- MondayJun 8Overcast——66°43°+10°
- TuesdayJun 9Light Drizzle56%0.03″67°51°+1°
- WednesdayJun 10Light Drizzle61%0.01″74°56°+7°
Ozone at AQI 43 now. AQI up 11 over the last 6 hours (gradual rise). With UV 6.9 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 28 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 43 now. With UV 6.9 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 28 by mid-afternoon.
- Present
- AQI 43
- UV peak
- 6.9 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 28
PM × Wind × Precip
PM2.5 at 6.6 µg/m³, PM10 at 8.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.80
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:35 AM
- Moonset
- 3:16 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
St. Ignatius at a glance
- Today vs. normal: 69°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 4, 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.