Juneau, Alaska Weather
Mosquitoes rise from snowmelt. Day 76 of spring. Read this microseason across nine climate regions →
Juneau weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——53°45°—
- ThursdayJun 4Light Rain100%0.81″44°36°-9°
- FridayJun 5Light Rain100%0.45″40°36°-4°
- SaturdayJun 6Light Drizzle96%0.19″41°37°+1°
- SundayJun 7Drizzle92%0.13″42°38°+1°
- MondayJun 8Light Drizzle57%0.01″42°36°0°
- TuesdayJun 9Overcast69%—43°38°+1°
PM2.5 at 14.6 µg/m³ (AQI 61) with a 0.67 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust. AQI up 5 over the last 6 hours (gradual rise).
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 42. Overcast through the UV peak window (cloud cover ~99%) — afternoon ozone should stay flat.
- Present
- AQI 42
- UV peak
- 5.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 16
PM × Wind × Precip
PM2.5 at 14.6 µg/m³ (AQI 61) with a 0.67 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.67
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 8:48 AM
- Moonset
- 2:10 PM
- In sign
- ♑︎ Capricorn
Mosquitoes rise from snowmelt
Juneau at a glance
- Today vs. normal: 5°F below the seasonal normal for this latitude
- Last frost: August 5 (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 3, 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.