Ketchum, Idaho Weather
Pikas hayfeeding in granite peaks. Day 77 of spring. Read this microseason across nine climate regions →
Ketchum weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——74°50°—
- FridayJun 5Overcast——77°51°+3°
- SaturdayJun 6Overcast——73°50°-4°
- SundayJun 7Overcast——60°46°-13°
- MondayJun 8Rain18%0.75″55°44°-5°
- TuesdayJun 9Drizzle35%0.22″53°45°-2°
- WednesdayJun 10Light Drizzle28%0.02″55°45°+2°
Ozone at AQI 35 now. AQI down 10 over the last 6 hours (steady decline since this morning). With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 16 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 AM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 35 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 16 by mid-afternoon.
- Present
- AQI 35
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 16
PM × Wind × Precip
PM2.5 at 5.5 µg/m³ (AQI 31) with a 0.75 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.75
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 6:22 AM
- Moonset
- 3:31 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
Ketchum at a glance
- Today vs. normal: 14°F below the seasonal normal for this latitude
- Last frost: May 8 (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.