Irwin, Idaho Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Irwin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——76°54°—
- FridayJun 5Clear——81°51°+5°
- SaturdayJun 6Overcast——83°54°+2°
- SundayJun 7Light Rain18%0.13″63°43°-20°
- MondayJun 8Overcast——75°42°+12°
- TuesdayJun 9Overcast30%—70°46°-5°
- WednesdayJun 10Light Drizzle37%0.01″72°48°+2°
PM2.5/PM10 ratio 0.61 with 8 mph wind — characteristic of long-range haze transport rather than a local source. AQI down 15 over the last 6 hours — air quality is improving sharply.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5/PM10 ratio 0.61 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.61
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 6:07 AM
- Moonset
- 3:19 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Irwin at a glance
- Today vs. normal: 16°F below the seasonal normal for this latitude
- Last frost: May 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 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.