Onalaska, Wisconsin Weather
Prairie lightning bugs rise. Day 76 of spring. Read this microseason across nine climate regions →
Onalaska weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——83°53°—
- ThursdayJun 4Light Rain26%0.07″85°61°+2°
- FridayJun 5Thunderstorm70%—80°64°-5°
- SaturdayJun 6Heavy Drizzle56%—81°61°+1°
- SundayJun 7Overcast16%—78°62°-3°
- MondayJun 8Drizzle39%0.08″73°63°-5°
- TuesdayJun 9Drizzle26%—78°67°+5°
Ozone at AQI 80 — peak already passed at 1 PM under clear skies. AQI up 20 in the last 6 hours — air quality is degrading. Levels should ease through evening.
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 80 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 80
- UV peak
- 4.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 80
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
- 4:12 AM
- Moonset
- 12:48 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Onalaska at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: May 9 (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
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Onalaska
SPC has placed Onalaska in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3SLGTSlight Risk
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.