Thomson, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Thomson weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Rain39%0.06″85°69°—
- SundayJul 5Overcast24%—86°67°+1°
- MondayJul 6Mostly Clear——81°60°-5°
- TuesdayJul 7Overcast——81°59°0°
- WednesdayJul 8Overcast23%—82°61°+1°
- ThursdayJul 9Light Showers31%0.22″80°68°-2°
- FridayJul 10Overcast29%—79°64°-1°
AQI 22 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM scrubbed by 2 hours of recent rain — PM2.5 down to 6.3 µg/m³, PM10 to 8.5 µg/m³.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 6.3 µg/m³, PM10 to 8.5 µg/m³.
- PM2.5/PM10
- 0.74
- Wind
- light
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:57 PM
- Moonset
- 10:04 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Thomson at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: April 28 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61285
16-Day Forecast — Thomson
- Sat84°69°39%
- Sun86°67°24%
- Mon81°60°2%
- Tue81°59°3%
- Wed82°61°23%
- Thu80°68°31%
- Fri79°64°29%
- Sat82°64°15%
- Sun68°59°7%
- Mon75°56°8%
- Tue76°60°13%
- Wed80°64°17%
- Thu82°66°16%
- Fri83°68°23%
- Sat85°70°32%
- Sun86°71°35%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Thomson
SPC includes Thomson in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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.
ZIP codes in Thomson
- 61285