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Belvidere, IL Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Friday Night
Partly cloudy, with a low around 48. Southeast wind around 5 mph.
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Saturday
Partly sunny, with a high near 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
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Saturday Night
Partly cloudy, with a low around 49.
National Weather Service forecast updated 1 day ago.
Hourly
Hourly forecast- Now54°
- 1 AM53°
- 2 AM52°
- 3 AM51°
- 4 AM50°
- 5 AM49°
- 6 AM49°
- 7 AM48°
- 8 AM50°
- 9 AM54°
- 10 AM59°
- 11 AM64°
- 12 PM67°
- 1 PM69°
- 2 PM71°
- 3 PM72°
- 4 PM72°
- 5 PM69°
- 6 PM65°
- 7 PM62°
- 8 PM59°
- 9 PM57°
- 10 PM56°
- 11 PM55°
10-day forecast
Details- ThuOct 22Sunny47°74°
- FriOct 23Sunny48°73°
- TodayOct 24Partly Sunny49°72°
- SunOct 25Partly Sunny49°73°
- MonOct 26Mostly Cloudy45°67°
- TueOct 27Mostly Cloudy10%44°63°
- WedOct 28Partly Sunny16%45°65°
- ThuOct 29Cloudy0.09 in35°60°
- FriOct 30Sunny31°46°
- SatOct 31Light snow showers0.04 in32°52°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news in Illinois
More weather news- Capitol Fax.com - Your Illinois News Radar » Good morning!
Thursday, Oct 22, 2026 - Posted by Isabel Miller DOMi & JD BECK, Herbie Hancock… - Barton - Thursday, Oct 22, 26 @ 8:53 am: Oh yeah, and you have to monitor comments between it all. Thank you for the lessons…
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Strong El Niño likely means a milder winter for northern Illinois, climatologist saysAfter a record tornado year, northern Illinois may get a break: forecasters favor a warmer-than-average winter as El Niño strengthens in the Pacific. El Niño refers to a warming of the Pacific Ocean’s surface that…
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Gorgeous weather continues for Central IllinoisWEDNESDAY: Warming up with sunny skies and calm conditions. High: 75 Low: 47 THURSDAY: Above average with sunny skies. High: 76 Low: 47 FRIDAY: Nice weather continues with sunny skies. High: 76 Low: 46 SATURDAY: Some…
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Another beautiful day ahead for Central IllinoisDECATUR, Ill. (WAND) – If you’re looking for a reason to get outside, Tuesday is your day. A high-pressure system settling over the Midwest is bringing abundant sunshine and calm winds to Central Illinois, with…
- Central Illinois Winter Weather Outlook
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One of the year’s most pleasant weather stretches arrives in Central IllinoisDECATUR, Ill. (WAND) – A beautiful stretch of sunshine and mild temperatures is settling into the region, and it’s the perfect time to get outside and enjoy it. High pressure is taking control of the Midwest, locking in…
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A great week ahead for Central IllinoisWAND DECATUR, Ill. (WAND) – A wonderful weekend across Central Illinois carries into the start of the workweek. Overnight lows dip back into the upper 30s tonight with a small risk for patchy frost, though coverage will…
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Sunshine, chilly mornings and a big warm-up ahead for central IllinoisCENTRAL ILLINOIS (25News Now) - Fall is making an appearance across central Illinois this weekend, but don’t get too comfortable with the chilly temperatures. After a cold start on Sunday morning, sunshine will help…
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Overnight Frost Advisory for parts of Illinois, NW IndianaCBS News Colorado 10pm Saturday CBS News Detroit Weekend 11pm CBS News Los Angeles Weekend 9pm CBS News Philadelphia Weekend 11pm KDKA News Weekend 11pm CBS News Texas Weekend 10pm
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Frost advisory back in effect for Central IllinoisWAND DECATUR, Ill. (WAND) – Another cool day starts the weekend across Central Illinois with highs Saturday only reaching the upper 50s under plenty of sunny skies. Strong high pressure remains in control keeping skies…
Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- SatModerate
- SunModerate
- MonModerate
Rockford, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyRockford Area, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Rockford 21 km
- Elgin 53 km
- Janesville 49 km
- DeKalb 38 km
- Crystal Lake 44 km
- Carpentersville 51 km
- Beloit 31 km
- St. Charles 59 km
- Algonquin 47 km
- Lake in the Hills 43 km
- McHenry 48 km
- Huntley 36 km
Forecasters' discussion
From the National Weather Service office in LOT, issued 48 min ago
Key Messages
- Precipitation free, unseasonably warm weather will continue through this weekend, with temperatures continuing to generally run above average through next week.
- Chances for any meaningful rainfall are low through next workweek.
Discussion
Issued at 150 PM CDT Fri Oct 23 2026
Tonight through Sunday:
As of this writing, what had been a bank of extensive fog and very low clouds across Chicago's far northern suburbs this morning has finally contracted to a remaining patch near Winthrop Harbor, IL. With lake enhanced moisture evident in the Waukegan and southeast WI dew point obs, wouldn't be surprised if patchy fog sneaks back into northeastern Lake County this evening from continued light to moderate southeasterly boundary layer flow.
Another calm night is in store tonight, with the main change happening aloft in terms of strengthening southerly flow just above the nocturnal inversion. Over the southeast half or third of the area (I-88 corridor in interior Chicago metro and points southeast), flow aloft should be sufficiently weak to enable patchy shallow ground fog development. Can't completely rule out very localized dense fog, but the setup isn't nearly as favorable as this (Friday) morning. High clouds will filter in from the northwest overnight into Saturday morning, keeping overnight lows a bit milder across interior northern Illinois in particular.
On Saturday, high temperatures will likely be close to a carbon copy of today (Friday), in the lower to mid 70s. Illinois side lake cooling will be confined to the immediate shoreline during the afternoon as southerly winds back to southeast with lake influence. Following a calm and cool (relative to Saturday afternoon's warmth) Saturday night, Sunday will likely be the warmest day of this stretch unless mid and high cloud cover limits high temps a bit.
Sunday Night through Friday:
Aviation
Issued at 1209 AM CDT Sat Oct 24 2026
There are no significant aviation weather concerns anticipated through the period.
Surface high pressure will center over New England today into tonight as a cold front shifts eastward from the PLains into the Upper Midwest. Overall, this will result in light south- southeasterly surface winds across the terminal airspace today and tonight. VFR conditions will prevail through the period, though higher level cloud cover can be expected.
KJB
Lot Watches
IL...None. IN...None. LM...None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.