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Hartland, WI Weather Tomorrow

Follow tomorrow's Hartland weather with an accurate 5 day outlook that includes precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Hartland area and around Waukesha county, Wisconsin.
Updated: Wed Sep 2nd 2026 11:45 PM CDT
Hartland, WI Weather – 9-3 – Scattered Showers
87° / 70°
Scattered Showers
Daytime highs will reach 87°F with lows dropping to 70°F in Hartland, where showers likely at times. Rainfall predicted to have a 70% chance with an estimated 0.11in. Wind will be moderate, blowing around 15mph on average and gusts of 24.2mph at 9 PM. The humidity will be on the higher side, averaging about 78%, the maximum being 95% at 11 PM and 52% being its lowest at 3 PM. Barometric pressure is its highest of 29.91inHg at 8 AM, a lowest point of 29.82inHg at 9 PM with an avg 29.88inHg.
Hartland, WI Weather – 9-4 – Scattered Thunderstorms
86° / 66°

Weather Tomorrow

Scattered Thunderstorms
Daytime highs will reach 86°F with lows dropping to 66°F in Hartland, where thunder and lightning are likely. The chance of rain is 82% with an estimated 0.16in. Wind will be moderate, blowing around 14mph on average and gusts of 26.3mph at 7 AM. High humidity with average of 86% is anticipated, the maximum being 99% at 6 AM and 56% being its lowest at 2 PM. Barometric pressure is its highest of 29.96inHg at 5 AM, a lowest point of 29.84inHg at 3 AM with an avg 29.89inHg.
Hartland, WI Weather – 9-5 – Fog
79° / 66°
Fog
In Hartland, fog is likely with a high near 79°F and a low around 66°F. The chance of rain is 79% with an estimated 0.18in. Wind will be moderate, blowing around 11mph on average and gusts of 19.7mph at 3 PM. High humidity with average of 89% is anticipated, the maximum being 99% at 6 AM and 71% being its lowest at 1 PM. Barometric pressure is its highest of 30.01inHg at 10 PM, a lowest point of 29.87inHg at 1 AM with an avg 29.93inHg.
Hartland, WI Weather – 9-6 – Sunny
73° / 64°
Sunny
Hartland may see a sunny day, with daytime highs of 73°F and overnight lows near 64°F. There might be light rainfall having a 12% chance. Wind will be moderate, blowing around 13mph on average and gusts of 17.8mph at 4 AM. The humidity will be on the higher side, averaging about 77%, the maximum being 96% at 6 AM and 53% being its lowest at 1 PM. Barometric pressure is its highest of 30.11inHg at 12 PM, a lowest point of 30.01inHg at 12 AM with an avg 30.08inHg.
Hartland, WI Weather – 9-7 – Overcast
74° / 63°
Overcast
In Hartland, it will be overcast with highs near 74°F and lows around 63°F. There might be light rainfall having a 14% chance. Wind will be moderate, blowing around 12mph on average and gusts of 27.6mph at 10 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 94% at 6 AM and 54% being its lowest at 1 PM. Barometric pressure is its highest of 30.14inHg at 8 AM, a lowest point of 30.04inHg at 11 PM with an avg 30.09inHg.
Hartland, WI Weather – 9-8 – Overcast
90° / 69°
Overcast
In Hartland, it will be overcast with highs near 90°F and lows around 69°F. There's a very small chance of rainfall, only about 9%. Wind will be moderate, blowing around 16mph on average and gusts of 37.7mph at 10 PM. The humidity will be on the higher side, averaging about 61%, the maximum being 75% at 12 AM and 45% being its lowest at 1 PM. Barometric pressure is its highest of 30.02inHg at 12 AM, a lowest point of 29.87inHg at 11 PM with an avg 29.93inHg.

Currently

Patchy Rain Nearby 78°F
29.88 inHg.
Barometer
74%
Humidity
S 5.4 mph
Wind
Patchy Rain Nearby

5 Day Forecast Nearby

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