Dell, Montana Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Dell weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——74°46°—
- FridayJun 5Overcast——79°44°+5°
- SaturdayJun 6Overcast——75°52°-4°
- SundayJun 7Light Rain16%0.06″59°45°-16°
- MondayJun 8Overcast18%—65°41°+6°
- TuesdayJun 9Foggy31%—58°48°-7°
- WednesdayJun 10Drizzle50%0.12″56°46°-2°
PM2.5 at 8.3 µg/m³, PM10 at 13.9 µg/m³ — typical background levels with no transport signature. AQI flat over the last 6 hours (within ±3 points).
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 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 17 by mid-afternoon.
- Present
- AQI 39
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 17
PM × Wind × Precip
PM2.5 at 8.3 µg/m³, PM10 at 13.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.60
- Wind
- calm
- 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
- 6:19 AM
- Moonset
- 3:20 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Dell at a glance
- Today vs. normal: 14°F below the seasonal normal for this latitude
- Last frost: May 14 (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.