Topeka, Illinois Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
Topeka weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 2Partly Cloudy——84°54°—
- WednesdayJun 3Overcast——83°54°-1°
- ThursdayJun 4Overcast——83°56°0°
- FridayJun 5Light Drizzle52%—84°66°+1°
- SaturdayJun 6Drizzle58%—84°68°0°
- SundayJun 7Overcast21%—87°67°+3°
- MondayJun 8Light Drizzle30%—80°72°-7°
Ozone at AQI 48. AQI up 28 in the last 6 hours — air quality is degrading. Overcast through the UV peak window (cloud cover ~88%) — 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 48. Overcast through the UV peak window (cloud cover ~88%) — afternoon ozone should stay flat.
- Present
- AQI 48
- UV peak
- 0.1 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 4.8 µg/m³, PM10 at 5.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.96
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:53 AM
- Moonset
- 12:58 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Topeka at a glance
- Today vs. normal: 74°F — typical for the season
- Last frost: April 18 (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.