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Onalaska, WI Weather Forecast for 5-Days

Updated: Sat Mar 14th 2026 9:30 PM CDT

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Onalaska, WI Weather – 3-14 – Sunny
44° / 23°
Sunny
Daytime highs will reach 44°F with lows dropping to 23°F in Onalaska, where it will be sunny. Snow is likely with a 7% chance. Wind will be moderate, blowing around 15mph on average and gusts of 19.5mph at 11 PM. The humidity will be on the higher side, averaging about 70%, the maximum being 78% at 11 PM and 75% being its lowest at 10 PM. Barometric pressure is its highest of 29.96inHg at 10 PM, a lowest point of 29.93inHg at 11 PM with an avg 29.95inHg.
Onalaska, WI Weather – 3-15 – Moderate Or Heavy Snow Showers
33° / 23°

Weather Tomorrow

Moderate Or Heavy Snow Showers
Onalaska could see moderate Or Heavy Snow Showers with daytime highs of 33°F and nighttime lows near 23°F. Rainfall predicted to have a 62% chance with an estimated 0.99in. Snow is likely with a 56% chance with an estimated 3.3in. Winds will be strong at speeds peaking at 30mph and gusts of 40.8mph at 11 PM. High humidity with average of 90% is anticipated, the maximum being 94% at 4 AM and 80% being its lowest at 12 AM. Barometric pressure is its highest of 29.89inHg at 12 AM, a lowest point of 29.41inHg at 8 AM with an avg 29.59inHg.
Onalaska, WI Weather – 3-16 – Moderate Or Heavy Snow Showers
17° / 10°
Moderate Or Heavy Snow Showers
Highs will reach 17°F with lows near 10°F in Onalaska, where moderate Or Heavy Snow Showers are. Rainfall predicted to have a 74% chance with an estimated 0.39in. Snow is likely with a 25% chance with an estimated 0in. Winds will be strong at speeds peaking at 28mph and gusts of 37.8mph at 12 AM. High humidity with average of 81% is anticipated, the maximum being 91% at 11 PM and 73% being its lowest at 7 PM. Barometric pressure is its highest of 30.14inHg at 10 PM, a lowest point of 29.73inHg at 1 AM with an avg 29.95inHg.
Onalaska, WI Weather – 3-17 – Moderate Or Heavy Snow Showers
28° /
Moderate Or Heavy Snow Showers
Moderate Or Heavy Snow Showers are in the forecast for Onalaska, with a high of 28°F and a low of 4°F. The chance of rain is 77% with an estimated 0.17in. Snow is likely with a 9% chance with an estimated 1.3in. Wind will be moderate, blowing around 11mph on average and gusts of 17.1mph at 1 AM. The humidity will be on the higher side, averaging about 80%, the maximum being 92% at 10 PM and 71% being its lowest at 4 PM. Barometric pressure is its highest of 30.24inHg at 7 AM, a lowest point of 29.92inHg at 9 PM with an avg 30.12inHg.
Onalaska, WI Weather – 3-18 – Light Snow
33° / 18°
Light Snow
In Onalaska, light Snow is likely with a high near 33°F and a low around 18°F. The chance of rain is 82% with an estimated 0.45in. Snow is likely with a 57% chance with an estimated 3.3in. Wind will be moderate, blowing around 11mph on average and gusts of 15.2mph at 12 AM. High humidity with average of 96% is anticipated, the maximum being 99% at 3 PM and 92% being its lowest at 10 AM. Barometric pressure is its highest of 30.1inHg at 10 PM, a lowest point of 29.8inHg at 1 AM with an avg 29.99inHg.
Onalaska, WI Weather – 3-19 – Freezing Fog
35° / 15°
Freezing Fog
Freezing Fog is in the forecast for Onalaska, with a high of 35°F and a low of 15°F. The chance of rain is 80% with an estimated 0.01in. Snow is likely with a 9% chance. Winds will be light at 7mph and gusts of 11.1mph at 4 PM. High humidity with average of 99% is anticipated, the maximum being 100% at 3 PM and 96% being its lowest at 9 AM. Barometric pressure is its highest of 30.13inHg at 8 AM, a lowest point of 30.07inHg at 3 PM with an avg 30.1inHg.

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