Cornell, Wisconsin Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Cornell weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——82°54°—
- ThursdayJun 4Light Rain33%0.09″84°63°+2°
- FridayJun 5Drizzle59%0.05″80°64°-4°
- SaturdayJun 6Clear50%—81°59°+1°
- SundayJun 7Overcast——78°59°-3°
- MondayJun 8Light Rain25%0.15″77°58°-1°
- TuesdayJun 9Light Rain25%0.17″78°64°+1°
Ozone at AQI 81. AQI up 44 in the last 6 hours — air quality is degrading. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
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 81. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 81
- UV peak
- 0.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 4.8 µg/m³, PM10 at 5.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 4:52 AM
- Moonset
- 1:49 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Cornell at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: May 17 (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 4, 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 — Cornell
SPC has placed Cornell in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3MRGLMarginal Risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
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.