How is the weather in Ontario, WI?

At 3:45 AM on Sat, Sep 6, 2025 it is 45 degrees Fahrenheit, feeling like 45 degrees.

Ontario, WI Weather Forecast and Current Conditions (54651)

45°F
Feels Like 45°F

Humidity 78% Dew Point 39°F Wind Calm 0 MPH Barometer 29.08 in.738.6 mm

Solar Rad 0 w/m2

Report from 9 miles S of central Ontario at 3:45 AM Sat, Sep 6, 2025

Current Weather

45°F
Feels Like 45°F

Humidity 78% Dew Point 39°F Wind Calm 0 MPH Barometer 29.08 in.738.6 mm

Solar Rad 0 w/m2

Report from 9 miles S of central Ontario at 3:45 AM Sat, Sep 6, 2025

Forecast at a Glance

SatSep 6

30%

62°

39°

SunSep 7

65°

41°

MonSep 8

10%

72°

55°

TueSep 9

50%

73°

55°

WedSep 10

10%

77°

53°

ThuSep 11

73°

52°

FriSep 12

10%

75°

This Date in Weather History

1988 - Unseasonably cool weather prevailed across the north central and northeastern U.S. Thirty cities reported record low temperatures for the date, including Saint Joseph MO with a reading of 38 degrees. A low of 44 degrees at Indianapolis IN was their coolest reading of record for so early in the season. The mercury dipped to 31 degrees at Hibbing MN and Philips WI.

Ontario 7 Day Weather Forecast Details

Saturday Sep 6

Day: A chance of rain showers after 2pm. Mostly sunny. High near 62, with temperatures falling to around 60 in the afternoon. West wind 3 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

Night: A chance of rain showers before 10pm. Partly cloudy, with a low around 39. West wind 2 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Sunday Sep 7

Day: Sunny, with a high near 65. Northwest wind 2 to 6 mph.

Night: Mostly clear, with a low around 41. West wind around 2 mph.

Monday Sep 8

Day: Mostly sunny, with a high near 72. South wind 2 to 10 mph, with gusts as high as 18 mph.

Night: A chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 55. South wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

Tuesday Sep 9

Day: A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 73. South wind 5 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

Night: A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 55. South wind around 3 mph. Chance of precipitation is 20%.

Wednesday Sep 10

Day: Mostly sunny, with a high near 77. Southeast wind around 3 mph.

Night: Partly cloudy, with a low around 53. East wind around 2 mph.

Thursday Sep 11

Day: Partly sunny, with a high near 73. East wind 2 to 6 mph.

Night: Mostly cloudy, with a low around 52. East wind around 5 mph.

Friday Sep 12

Day: Mostly sunny, with a high near 75. Southeast wind 3 to 7 mph.

Sun & Moon Monthly

First Light 6:03 AM

Sunrise 6:33 AM

Sunset 7:31 PM

Last Light 8:00 PM

Moonrise 7:05 PM

Moonset 4:57 AM

Moon Phase

Local Parks Weather - Plan Ahead to Enjoy Your Day

Data costs money. Servers cost money. Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by disabling your ad blocker, contribute to WeatherForYou.com by buying me a coffee or subscribe to our ClearSky ad-free service.