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Beloit, WI 53512 Weather
Current conditions
Observed at Janesville-Rock County · 34 min ago
Forecast
10-day-
Tonight
Mostly clear, with a low around 43. Southeast wind around 0 mph.
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Wednesday
Sunny, with a high near 71. South wind 0 to 5 mph.
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Wednesday Night
Mostly clear, with a low around 47. Southwest wind around 0 mph.
National Weather Service forecast updated 2 hrs ago.
Hourly
Hourly forecast- Now48°
- 1 AM47°
- 2 AM47°
- 3 AM46°
- 4 AM45°
- 5 AM44°
- 6 AM43°
- 7 AM43°
- 8 AM45°
- 9 AM49°
- 10 AM56°
- 11 AM61°
- 12 PM65°
- 1 PM68°
- 2 PM70°
- 3 PM70°
- 4 PM71°
- 5 PM69°
- 6 PM66°
- 7 PM62°
- 8 PM57°
- 9 PM55°
- 10 PM54°
- 11 PM52°
10-day forecast
Details- TonightOct 20Mostly Clear43°
- TodayOct 21Sunny47°71°
- ThuOct 22Sunny48°72°
- FriOct 23Sunny50°70°
- SatOct 24Partly Sunny52°70°
- SunOct 25Partly Sunny20%48°69°
- MonOct 26Slight Chance Rain Showers20%42°61°
- TueOct 27Mostly Sunny12%57°
- WedOct 28Sunny33°49°
- ThuOct 29Cloudy32°53°
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 near Beloit
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- WedModerate
- ThuModerate
- FriModerate
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
MonthlyBeloit, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Rockford 27 km
- Janesville 19 km
- Woodstock 52 km
- Belvidere 31 km
- Freeport 54 km
- Loves Park 21 km
- Machesney Park 18 km
- Whitewater 44 km
- Stoughton 48 km
- Fort Atkinson 49 km
- Monroe 51 km
- Roscoe 11 km
Forecasters' discussion
From the National Weather Service office in MKX, issued 3 hrs ago
Key Messages
- Patchy dense fog may occur in eastern parts of the area later this evening into early Wednesday morning, with some dense fog into tonight/Wednesday morning over portions of the nearshore waters of Lake Michigan.
- Dry with a gradual warming trend into Saturday night/Sunday, then possibly some showers and cooler temperatures Sunday night into early next week.
Update
Issued 810 PM CDT Tue Oct 20 2026
No changes to the going forecast.
With perfectly clear skies evident on Satellite, nearly calm winds, and a remnant lake-breeze boundary washed onshore, conditions are primed for radiational cooling and (eventually) fog development later this evening into Tonight.
Sheppard
Short Term
Issued 235 PM CDT Tue Oct 20 2026
Tonight through Friday:
High pressure will shift further to the east northeast of the region tonight, with another high pressure system shifting east into and northeast of the region Thursday into Friday.
There is an area of patchy dense fog over the nearshore waters of Lake Michigan for areas north of North Point Lighthouse, which may continue to linger there into tonight. This may push back onshore tonight into early Wednesday morning for eastern portions of the area. Kept the fog mention in the forecast for eastern parts of the area for this period. Will have to watch trends to see if a Dense Fog Advisory would be needed at some point.
Otherwise, dry conditions are expected into the end of the week. Temperatures will remain above seasonal normal values as well, with highs into the upper 60s to around 70 degrees each day Wednesday into Friday. Onshore winds each day should bring slightly cooler temperatures to areas near Lake Michigan. Lows each night should rise into the middle to upper 40s by Wednesday night and Thursday night.
Wood
Long Term
Issued 235 PM CDT Tue Oct 20 2026
Friday night through Tuesday:
500 mb cluster analysis generally shows an anomalous 500 mb ridge axis developing over the region Friday night into Saturday night, before becoming more zonal Sunday into Monday. This should result in south winds maintaining warm temperatures into the weekend. There may finally be a cold front that shifts slowly southeast across the region Sunday into Sunday night or Monday. This may have enough moisture and upward vertical motion with it to bring 20 to 30 percent chances for showers.
Cold air advection behind the front with north to northeast winds may bring cooler and more seasonable temperatures for early next week. This is supported by ensemble member trends.
Wood
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 4Conservative index and reflects what the press published. Terms of use.