Petersburg, Alaska Weather
Mosquitoes rise from snowmelt. Day 76 of spring. Read this microseason across nine climate regions →
Petersburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Light Rain100%0.18″69°51°—
- ThursdayJun 4Light Rain100%0.34″59°46°-10°
- FridayJun 5Light Rain98%0.33″49°44°-10°
- SaturdayJun 6Drizzle96%0.13″50°46°+1°
- SundayJun 7Light Drizzle59%0.01″55°46°+5°
- MondayJun 8Light Drizzle59%0.06″60°46°+5°
- TuesdayJun 9Overcast80%—55°45°-5°
PM2.5 at 14.1 µg/m³ (AQI 60) with a 0.74 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. 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 41. Overcast through the UV peak window (cloud cover ~97%) — afternoon ozone should stay flat.
- Present
- AQI 41
- UV peak
- 3.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 14.1 µg/m³ (AQI 60) with a 0.74 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.74
- 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
- 8:26 AM
- Moonset
- 2:22 PM
- In sign
- ♑︎ Capricorn
Mosquitoes rise from snowmelt
Petersburg at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: July 26 (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.