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Northbrook, IL Weather Tomorrow

Keep up with changing weather in Northbrook using tomorrow's forecast and the next 5 days of daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details for the Northbrook area and around Cook county, Illinois.
Updated: Mon Sep 21st 2026 5:45 PM CDT
Northbrook, IL Weather – 9-21 – Overcast
64° / 56°
Overcast
Northbrook is set for overcast with temperatures peaking at 64°F and dipping to 56°F. There's a moderate 38% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 13mph on average and gusts of 20.1mph at 11 PM. The humidity will be on the higher side, averaging about 71%, the maximum being 65% at 7 PM and 62% being its lowest at 6 PM. Barometric pressure is its highest of 30.16inHg at 11 PM, a lowest point of 30.12inHg at 6 PM with an avg 30.14inHg.
Northbrook, IL Weather – 9-22 – Sunny
64° / 55°

Weather Tomorrow

Sunny
In Northbrook, bright and sunny conditions with highs near 64°F and lows around 55°F. There's a moderate 37% chance of rainfall with an estimated 0.03in. Wind will be moderate, blowing around 11mph on average and gusts of 20.4mph at 12 AM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 74% at 6 AM and 46% being its lowest at 6 PM. Barometric pressure is its highest of 30.27inHg at 9 AM, a lowest point of 30.16inHg at 12 AM with an avg 30.23inHg.
Northbrook, IL Weather – 9-23 – Overcast
63° / 58°
Overcast
Daytime highs will reach 63°F with lows dropping to 58°F in Northbrook, where it will be overcast. There might be light rainfall having a 16% chance with an estimated 0in. Wind will be moderate, blowing around 12mph on average and gusts of 21.1mph at 8 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 75% at 6 AM and 62% being its lowest at 12 AM. Barometric pressure is its highest of 30.34inHg at 1 PM, a lowest point of 30.26inHg at 12 AM with an avg 30.31inHg.
Northbrook, IL Weather – 9-24 – Overcast
67° / 59°
Overcast
It will be overcast in Northbrook, with a high of 67°F and a low of 59°F. There might be light rainfall having a 24% chance with an estimated 0in. Winds will be light at 8mph and gusts of 15.9mph at 9 PM. The humidity will be on the higher side, averaging about 75%, the maximum being 84% at 7 AM and 63% being its lowest at 3 PM. Barometric pressure is its highest of 30.32inHg at 9 AM, a lowest point of 30.26inHg at 5 PM with an avg 30.29inHg.
Northbrook, IL Weather – 9-25 – Overcast
64° / 60°
Overcast
Northbrook is set for overcast with temperatures peaking at 64°F and dipping to 60°F. There might be light rainfall having a 12% chance. Winds will be light at 7mph and gusts of 17.1mph at 2 AM. Humidity levels should be comfortable, sitting around 53% on average, the maximum being 63% at 12 AM and 45% being its lowest at 12 PM. Barometric pressure is its highest of 30.29inHg at 9 AM, a lowest point of 30.18inHg at 11 PM with an avg 30.24inHg.
Northbrook, IL Weather – 9-26 – Overcast
74° / 60°
Overcast
Daytime highs will reach 74°F with lows dropping to 60°F in Northbrook, where skies will be overcast. Rainfall predicted to have a 57% chance with an estimated 0.05in. Winds will be light at 9mph and gusts of 19.8mph at 5 AM. Humidity levels should be comfortable, sitting around 53% on average, the maximum being 86% at 11 PM and 34% being its lowest at 1 PM. Barometric pressure is its highest of 30.19inHg at 12 AM, a lowest point of 30.07inHg at 11 PM with an avg 30.13inHg.

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