Belvidere, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Belvidere weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Showers59%0.40″83°68°—
- SundayJul 5Overcast16%—81°63°-2°
- MondayJul 6Overcast——79°62°-2°
- TuesdayJul 7Overcast——81°56°+2°
- WednesdayJul 8Overcast23%—81°61°0°
- ThursdayJul 9Drizzle33%0.13″76°66°-5°
- FridayJul 10Overcast25%—79°62°+3°
AQI 30 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 34. Overcast through the UV peak window (cloud cover ~81%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 34. Overcast through the UV peak window (cloud cover ~81%) — afternoon ozone should stay flat.
- Present
- AQI 34
- UV peak
- 2.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
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
- 9:59 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Belvidere at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: April 30 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61008
16-Day Forecast — Belvidere
- Sat83°68°59%
- Sun81°63°16%
- Mon79°62°2%
- Tue81°56°2%
- Wed81°61°23%
- Thu76°66°33%
- Fri79°62°25%
- Sat82°61°14%
- Sun66°58°9%
- Mon74°54°10%
- Tue75°59°11%
- Wed79°61°25%
- Thu82°65°14%
- Fri83°68°26%
- Sat86°69°30%
- Sun84°70°29%
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 — Belvidere
SPC includes Belvidere 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 Belvidere
- 61008