Interstate State Park, WI 14 Day Weather
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Interstate State Park, WI Weather Forecast


Interstate State Park, WI Weather Forecast Dated: 924 PM Tue Sep 08 2026
Expect a mild stretch with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate.
Tuesday, September 8, 2026
Mid-Morning
68°F 20°C
Drizzle
Mid-Afternoon
77°F 25°C
Overcast
Early-Evening
77°F 25°C
Overcast
Pleasant near 77°F 25°C, early showers breaking for a drier afternoon, with lower humidity and steady pressure. Winds turning from the S to the SSW at 9 mph 15 km/h. Gusts up to 21 mph 34 km/h.
Wednesday, September 9, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
69°F 21°C
Sunny
Comfortable with temperatures reaching 79°F 26°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the WNW to the NW at 11 mph 17 km/h.
Thursday, September 10, 2026
Mid-Morning
61°F 16°C
Sunny
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
73°F 23°C
Overcast
Enjoyable around 79°F 26°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and barometric pressure falling. Winds moving from the WSW to the SSE at 8 mph 12 km/h.
Friday, September 11, 2026
Mid-Morning
58°F 15°C
Light Showers
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
75°F 24°C
Partly Cloudy
Mild temperatures up to 77°F 25°C, early showers breaking for a drier afternoon, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the SSW at 13 mph 21 km/h. Gusts up to 27 mph 43 km/h.
Saturday, September 12, 2026
Mid-Morning
56°F 14°C
Sunny
Mid-Afternoon
74°F 23°C
Sunny
Early-Evening
68°F 20°C
Sunny
Mild with a high of 74°F 23°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds shifting from the WNW to the NNW at 9 mph 14 km/h.
Sunday, September 13, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
59°F 15°C
Overcast
Early-Evening
56°F 14°C
Overcast
Mildly cool near 59°F 15°C, overcast throughout the day, with increasing humidity and steady pressure. Winds ESE at 6 mph 10 km/h.
Monday, September 14, 2026
Mid-Morning
51°F 11°C
Heavy Rain Showers
Mid-Afternoon
53°F 12°C
Light Showers
Early-Evening
52°F 12°C
Overcast
Chilly near 53°F 12°C, intermittent showers through midday, easing by evening, with steady humidity and steady pressure. Winds switching from the NE to the ENE at 9 mph 15 km/h.
Tuesday, September 15, 2026
Mid-Morning
51°F 11°C
Fog
Mid-Afternoon
63°F 17°C
Scattered Showers
Early-Evening
60°F 16°C
Partly Cloudy
Cool with a high near 63°F 17°C, scattered downpours possible, with lower humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
66°F 19°C
Scattered Showers
Mild temperatures up to 71°F 22°C, locally heavy downpours at times, with increasing humidity and barometric pressure falling. Winds blowing from the SSE at 15 mph 25 km/h. Gusts up to 31 mph 50 km/h.
Thursday, September 17, 2026
Mid-Morning
71°F 22°C
Nearby Thunderstorms
Mid-Afternoon
81°F 27°C
Cloudy
Early-Evening
80°F 27°C
Nearby Thunderstorms
Warm and summery around 81°F 27°C (feels like 85°F 29°C), periods of heavy thunderstorms, with lower humidity and steady pressure. Winds swinging from the S to the SW at 11 mph 17 km/h. Gusts up to 26 mph 41 km/h.
Friday, September 18, 2026
Mid-Morning
54°F 12°C
Overcast
Mid-Afternoon
52°F 11°C
Overcast
Early-Evening
49°F 10°C
Scattered Showers
Chilly near 52°F 11°C, scattered downpours possible, with steady humidity and steady pressure. Winds shifting from the ESE to the NNW at 12 mph 19 km/h. Gusts up to 23 mph 37 km/h.
Saturday, September 19, 2026
Mid-Morning
42°F 5°C
Sunny
Mid-Afternoon
53°F 12°C
Sunny
Early-Evening
49°F 10°C
Sunny
Crisp with a high near 53°F 12°C, sunny throughout the day, with steady humidity and steady pressure. Winds tapering down from N 12 mph 19 km/h to SW 2 mph 4 km/h.
Sunday, September 20, 2026
Mid-Morning
46°F 8°C
Sunny
Mid-Afternoon
60°F 16°C
Sunny
Early-Evening
54°F 13°C
Overcast
Refreshing around 60°F 16°C, sunny in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and barometric pressure falling. Winds switching from the SSW to the S at 9 mph 14 km/h. Gusts up to 20 mph 32 km/h.
Monday, September 21, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
69°F 21°C
Sunny
Early-Evening
65°F 18°C
Sunny
Mild temperatures up to 69°F 21°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the S to the SSE at 10 mph 16 km/h. Gusts up to 23 mph 37 km/h.
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