Chester, Montana Weather
Pikas hayfeeding in granite peaks. Day 78 of spring. Read this microseason across nine climate regions →
Chester weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——77°49°—
- FridayJun 5Overcast——77°49°0°
- SaturdayJun 6Light Drizzle16%—71°53°-6°
- SundayJun 7Light Drizzle36%0.02″59°50°-12°
- MondayJun 8Overcast26%—71°44°+12°
- TuesdayJun 9Light Drizzle31%0.02″70°55°-1°
- WednesdayJun 10Light Drizzle45%0.09″61°56°-9°
AQI 45 (Good), driven by Ozone. AQI up 10 over the last 6 hours (gradual rise). Ozone at AQI 39 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 9 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 39 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 9 by mid-afternoon.
- Present
- AQI 39
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 9
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
- 6:52 AM
- Moonset
- 4:11 PM
- In sign
- ♒︎ Aquarius
Pikas hayfeeding in granite peaks
Chester at a glance
- Today vs. normal: 68°F — typical for the season
- Last frost: June 6 (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.