Arlington Heights, IL Weather Tomorrow

See what tomorrow's weather has in store for Arlington Heights with a reliable 5 day forecast featuring precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction for the Arlington Heights area and around Cook county, Illinois.
Updated: Sun Oct 25th 2026 5:30 AM CDT
Arlington Heights, IL Weather – 10-25 – Overcast
71° / 53°
Overcast
In Arlington Heights, it will be overcast with highs near 71°F and lows around 53°F. There might be light rainfall having a 12% chance. Winds will be light at 6mph and gusts of 13.9mph at 8 AM. Humidity levels should be comfortable, sitting around 55% on average, the maximum being 73% at 7 AM and 38% being its lowest at 2 PM. Barometric pressure is its highest of 30.42inHg at 10 AM, a lowest point of 30.31inHg at 5 PM with an avg 30.36inHg.
Arlington Heights, IL Weather – 10-26 – Overcast
63° / 53°

Weather Tomorrow

Overcast
Highs will reach 63°F with lows near 53°F in Arlington Heights, where overcast is. There might be light rainfall having a 15% chance. Winds will be light at 10mph and gusts of 17.2mph at 9 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 92% at 7 AM and 53% being its lowest at 2 PM. Barometric pressure is its highest of 30.37inHg at 9 AM, a lowest point of 30.3inHg at 4 PM with an avg 30.33inHg.
Arlington Heights, IL Weather – 10-27 – Overcast
68° / 52°
Overcast
In Arlington Heights, overcast is likely with a high near 68°F and a low around 52°F. There might be light rainfall having a 14% chance. Winds will be light at 8mph and gusts of 16.6mph at 12 AM. The humidity will be on the higher side, averaging about 66%, the maximum being 88% at 7 AM and 45% being its lowest at 3 PM. Barometric pressure is its highest of 30.31inHg at 12 AM, a lowest point of 30.2inHg at 4 PM with an avg 30.27inHg.
Arlington Heights, IL Weather – 10-28 – Sunny
70° / 57°
Sunny
Sunshine is in the forecast for Arlington Heights, with a high of 70°F and a low of 57°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 10mph and gusts of 26mph at 11 PM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 74% at 4 AM and 42% being its lowest at 3 PM. Barometric pressure is its highest of 30.26inHg at 9 AM, a lowest point of 30.11inHg at 4 PM with an avg 30.19inHg.
Arlington Heights, IL Weather – 10-29 – Scattered Showers
72° / 55°
Scattered Showers
In Arlington Heights, on and off showers are set to occur with highs near 72°F and lows around 55°F. Rainfall predicted to have a 63% chance with an estimated 0.1in. Wind will be moderate, blowing around 11mph on average and gusts of 34.3mph at 4 AM. The humidity will be on the higher side, averaging about 66%, the maximum being 87% at 10 PM and 48% being its lowest at 12 PM. Barometric pressure is its highest of 30.21inHg at 11 PM, a lowest point of 30.11inHg at 5 PM with an avg 30.15inHg.
Arlington Heights, IL Weather – 10-30 – Scattered Showers
62° / 52°
Scattered Showers
In Arlington Heights, scattered showers are likely with a high near 62°F and a low around 52°F. The chance of rain is 76% with an estimated 0.13in. Winds will be light at 5mph and gusts of 13.2mph at 10 AM. High humidity with average of 82% is anticipated, the maximum being 93% at 7 AM and 70% being its lowest at 1 PM. Barometric pressure is its highest of 30.26inHg at 10 AM, a lowest point of 30.21inHg at 12 AM with an avg 30.24inHg.

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