Geneseo, Illinois Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Geneseo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——86°58°—
- FridayJun 5Thunderstorm47%0.11″79°70°-7°
- SaturdayJun 6Light Showers52%—82°67°+3°
- SundayJun 7Showers30%—83°69°+1°
- MondayJun 8Showers66%0.35″82°69°-1°
- TuesdayJun 9Light Showers34%0.05″86°70°+4°
- WednesdayJun 10Thunderstorm21%—90°74°+4°
Ozone at AQI 81 — peak already passed at 1 PM under clear skies. AQI up 19 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 81 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 81
- UV peak
- 6.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 81
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
- 4:35 AM
- Moonset
- 1:58 PM
- In sign
- ♒︎ Aquarius
Prairie lightning bugs rise
Geneseo at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 25 (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 — Geneseo
SPC has placed Geneseo in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
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.