Illinois · NWS LOT office
Belvidere, IL weather
It is 54°F and clear at Rockford, Greater Rockford Airport as of Oct 28, 1:15 AM CDT. Overnight: Mostly Clear, low near 50°F, 1% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 1:20 AM CDT.
Current conditions
Temperature
54°F
Clear
Wind
SSE 5 mph
Humidity 77% · dew point 46°F
Pressure · visibility
30.18 inHg
Visibility 10 mi
Observed at Rockford, Greater Rockford Airport (KRFD), Oct 28, 1:15 AM CDT. Station readings can lag or be missing.
Alerts for this area
No active NWS alerts cover the Belvidere forecast zone right now.
Around the NWS LOT forecast area
No active alerts in zones served by the LOT office near Belvidere.
From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. No alerts are active anywhere in Illinois.
For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.
Next 24 hours
| Time | Temp | Forecast | Precip. chance | Wind |
|---|---|---|---|---|
| Wed 1 AM | 53°F | Partly Cloudy | 1% | S 5 mph |
| Wed 2 AM | 52°F | Mostly Clear | 1% | S 5 mph |
| Wed 3 AM | 52°F | Mostly Clear | 1% | S 5 mph |
| Wed 4 AM | 52°F | Mostly Clear | 1% | S 5 mph |
| Wed 5 AM | 52°F | Clear | 0% | 0 mph |
| Wed 6 AM | 51°F | Sunny | 0% | 0 mph |
| Wed 7 AM | 50°F | Sunny | 0% | 0 mph |
| Wed 8 AM | 52°F | Sunny | 0% | S 5 mph |
| Wed 9 AM | 55°F | Sunny | 0% | S 5 mph |
| Wed 10 AM | 61°F | Sunny | 0% | S 5 mph |
| Wed 11 AM | 65°F | Sunny | 0% | S 10 mph |
| Wed 12 PM | 68°F | Sunny | 0% | S 10 mph |
| Wed 1 PM | 71°F | Sunny | 0% | S 10 mph |
| Wed 2 PM | 73°F | Sunny | 0% | S 15 mph |
| Wed 3 PM | 74°F | Sunny | 0% | S 15 mph |
| Wed 4 PM | 73°F | Mostly Sunny | 0% | S 15 mph |
| Wed 5 PM | 71°F | Mostly Sunny | 0% | S 10 mph |
| Wed 6 PM | 68°F | Partly Cloudy | 0% | S 10 mph |
| Wed 7 PM | 65°F | Mostly Clear | 3% | S 10 mph |
| Wed 8 PM | 63°F | Mostly Clear | 3% | S 10 mph |
| Wed 9 PM | 62°F | Mostly Clear | 3% | S 10 mph |
| Wed 10 PM | 62°F | Mostly Clear | 8% | S 10 mph |
| Wed 11 PM | 62°F | Mostly Clear | 6% | S 15 mph |
| Thu 12 AM | 61°F | Partly Cloudy | 12% | SSW 15 mph |
Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Belvidere can differ.
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7-day forecast
Overnight
Low 50°F
Mostly clear. Low around 50, with temperatures rising to around 52 overnight. South wind 0 to 5 mph.
Wednesday
High 74°F·Low 57°F
Sunny. High near 74, with temperatures falling to around 71 in the afternoon. South wind 0 to 15 mph, with gusts as high as 25 mph.
Wednesday Night: A chance of rain showers between 2am and 4am, then a chance of showers and thunderstorms. Partly cloudy. Low around 57, with temperatures rising to around 59 overnight. South southwest wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Thursday
High 69°F·Low 40°F
A slight chance of showers and thunderstorms before 8am. Mostly sunny, with a high near 69. West wind around 10 mph. Chance of precipitation is 20%.
Thursday Night: Mostly clear, with a low around 40. North wind 0 to 5 mph.
Friday
High 63°F·Low 48°F
A slight chance of rain showers after 1pm. Partly sunny, with a high near 63. Chance of precipitation is 20%.
Friday Night: A chance of rain showers before 1am, then a chance of showers and thunderstorms. Cloudy, with a low around 48.
Saturday
High 62°F·Low 47°F
A chance of showers and thunderstorms. Mostly cloudy, with a high near 62.
Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 47.
Sunday
High 66°F·Low 50°F
A chance of rain showers. Mostly cloudy, with a high near 66.
Sunday Night: A slight chance of rain showers. Mostly cloudy, with a low around 50.
Monday
High 66°F·Low 51°F
A chance of rain showers. Mostly cloudy, with a high near 66.
Monday Night: A chance of rain showers. Mostly cloudy, with a low around 51.
Tuesday
High 66°F
Rain showers likely. Mostly cloudy, with a high near 66.
Nearby cities
- Loves Park, IL 8 mi
- Rockford, IL 9 mi
- Machesney Park, IL 10 mi
- Beloit, WI 19 mi
- Woodstock, IL 23 mi
- Huntley, IL 24 mi
- DeKalb, IL 24 mi
- Crystal Lake, IL 28 mi
Larger cities in the area
- Aurora, IL 46 mi · pop. 180,710
- Madison, WI 63 mi · pop. 285,300
- Chicago, IL 68 mi · pop. 2,721,308
- Milwaukee, WI 72 mi · pop. 563,531
See every city we cover in Illinois, or check all active alerts.
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About this forecast
- Forecast office
- Belvidere is served by the National Weather Service LOT forecast office, forecast zone ILZ004, county zone ILC007.
- Location used
- The Census Bureau's internal point for Belvidere (42.2654, -88.8878), in Boone County. Population: 25,325 (2024 estimate), number 88 of the 121 Illinois cities on this site.
- Radar
- Nearest NWS radar: KMKX. View it on radar.weather.gov.
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Sources
- Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/42.2654,-88.8878 (forecast issued Oct 28, 1:20 AM CDT).
- Official forecast page: forecast.weather.gov.
- City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
- Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.
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