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Ontario, WI Weather Forecast
Ontario, WI Weather Forecast Dated: 706 PM Wed Sep 09 2026
Expect a mild stretch with more clouds than sun and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Wednesday, September 9, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
85°F 29°C
Sunny
Early-Evening
73°F 23°C
Sunny
Warm and summery near 85°F 29°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the NW to the WNW at 8 mph 12 km/h.
Thursday, September 10, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
71°F 22°C
Sunny
Comfortable with temperatures reaching 79°F 26°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.
Friday, September 11, 2026
Mid-Morning
66°F 19°C
Sunny
Mid-Afternoon
80°F 26°C
Sunny
Early-Evening
73°F 23°C
Overcast
Quite warm around 80°F 26°C, sunny through the afternoon, turning overcast this evening, with lower humidity and barometric pressure falling. Winds switching from the SSW to the S at 14 mph 22 km/h. Gusts up to 26 mph 41 km/h.
Saturday, September 12, 2026
Mid-Morning
65°F 18°C
Scattered Showers
Mid-Afternoon
71°F 21°C
Scattered Showers
Early-Evening
67°F 20°C
Scattered Showers
Mild temperatures up to 71°F 21°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds moving from the WSW to the NW at 5 mph 8 km/h.
Sunday, September 13, 2026
Mid-Morning
60°F 16°C
Cloudy
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
70°F 21°C
Cloudy
Mild with a high of 73°F 23°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the ENE to the E at 8 mph 13 km/h.
Monday, September 14, 2026
Mid-Morning
63°F 17°C
Heavy Rain Showers
Mid-Afternoon
74°F 23°C
Scattered Showers
Early-Evening
67°F 19°C
Light Showers
Pleasant near 74°F 23°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds shifting from the SSE to the WNW at 14 mph 23 km/h. Gusts up to 29 mph 46 km/h.
Tuesday, September 15, 2026
Mid-Morning
51°F 11°C
Overcast
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
60°F 16°C
Sunny
Comfortable at 63°F 17°C, overcast in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds turning from the NW to the SE at 4 mph 7 km/h.
Wednesday, September 16, 2026
Mid-Morning
58°F 15°C
Overcast
Mid-Afternoon
69°F 20°C
Sunny
Early-Evening
64°F 18°C
Overcast
Enjoyable around 69°F 20°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
59°F 15°C
Light Fog
Mid-Afternoon
69°F 21°C
Partly Cloudy
Early-Evening
66°F 19°C
Partly Cloudy
Mild temperatures up to 69°F 21°C, overcast in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure.
Friday, September 18, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
76°F 25°C
Partly Cloudy
Early-Evening
72°F 23°C
Overcast
Mild with a high of 76°F 25°C, partly cloudy in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling. Winds out of the SSW at 10 mph 16 km/h. Gusts up to 20 mph 32 km/h.
Saturday, September 19, 2026
Mid-Morning
72°F 22°C
Fog
Mid-Afternoon
74°F 23°C
Scattered Showers
Early-Evening
71°F 22°C
Scattered Showers
Pleasant near 74°F 23°C, scattered downpours possible, with steady humidity and steady pressure. Winds moving from the W to the NE at 8 mph 13 km/h.
Sunday, September 20, 2026
Mid-Morning
65°F 18°C
Fog
Mid-Afternoon
70°F 21°C
Overcast
Early-Evening
69°F 20°C
Overcast
Comfortable with temperatures reaching 70°F 21°C, overcast throughout the day, with steady humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
61°F 16°C
Light Fog
Mid-Afternoon
68°F 20°C
Overcast
Early-Evening
67°F 20°C
Scattered Showers
Enjoyable around 68°F 20°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
60°F 15°C
Light Fog
Mid-Afternoon
68°F 20°C
Light Showers
Early-Evening
66°F 19°C
Scattered Showers
Mild temperatures up to 68°F 20°C, scattered downpours possible, with lower humidity and barometric pressure falling.
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