Tonica, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Tonica weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain76%1.1″85°70°—
- SundayJul 5Overcast16%—82°69°-3°
- MondayJul 6Overcast——80°64°-2°
- TuesdayJul 7Overcast——80°58°0°
- WednesdayJul 8Overcast10%—81°63°+1°
- ThursdayJul 9Thunderstorm48%0.08″80°67°-1°
- FridayJul 10Overcast37%—78°63°-2°
AQI 26 (Good), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 6.9 µg/m³, PM10 at 7.8 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 33. Overcast through the UV peak window (cloud cover ~71%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 4.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 9
PM × Wind × Precip
PM2.5 at 6.9 µg/m³, PM10 at 7.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- Wind
- light
- Recent rain
- 1h 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:53 PM
- Moonset
- 10:01 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Tonica at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 23 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61370
16-Day Forecast — Tonica
- Sat85°70°76%
- Sun82°69°16%
- Mon80°64°5%
- Tue80°58°2%
- Wed81°63°10%
- Thu80°67°48%
- Fri78°63°37%
- Sat81°64°14%
- Sun68°59°10%
- Mon72°56°9%
- Tue76°59°10%
- Wed78°62°19%
- Thu81°65°19%
- Fri80°69°26%
- Sat85°69°26%
- Sun82°72°32%
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 — Tonica
SPC has placed Tonica in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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.
ZIP codes in Tonica
- 61370