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Gridley, IL Weather Tomorrow

Get the forecast you need for Gridley tomorrow with an extended 5 day weather outlook featuring precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction throughout the Gridley area and around McLean county, Illinois.
Updated: Sun Sep 6th 2026 6:00 PM CDT
Gridley, IL Weather – 9-6 – Sunny
84° / 66°
Sunny
A sunny day is in the forecast for Gridley, with a high of 84°F and a low of 66°F. There's a very small chance of rainfall, only about 9%. Wind will be moderate, blowing around 11mph on average and gusts of 15.3mph at 7 PM. The humidity will be on the higher side, averaging about 70%, the maximum being 76% at 11 PM and 50% being its lowest at 7 PM. Barometric pressure is its highest of 30.08inHg at 11 PM, a lowest point of 30.02inHg at 7 PM with an avg 30.06inHg.
Gridley, IL Weather – 9-7 – Overcast
76° / 61°

Weather Tomorrow

Overcast
In Gridley, skies will be overcast with highs near 76°F and lows around 61°F. There might be light rainfall having a 13% chance. Wind will be moderate, blowing around 13mph on average and gusts of 20.8mph at 11 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 89% at 6 AM and 50% being its lowest at 2 PM. Barometric pressure is its highest of 30.16inHg at 8 AM, a lowest point of 30.07inHg at 12 AM with an avg 30.11inHg.
Gridley, IL Weather – 9-8 – Overcast
86° / 64°
Overcast
Gridley could see overcast with daytime highs of 86°F and nighttime lows near 64°F. There's a moderate 39% chance of rainfall with an estimated 0.02in. Wind will be moderate, blowing around 15mph on average and gusts of 33.8mph at 10 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 95% at 5 AM and 40% being its lowest at 3 PM. Barometric pressure is its highest of 30.11inHg at 10 AM, a lowest point of 29.96inHg at 8 PM with an avg 30.05inHg.
Gridley, IL Weather – 9-9 – Light Rain Shower
79° / 71°
Light Rain Shower
It will rain at times in Gridley, with a high of 79°F and a low of 71°F. The chance of rain is 87% with an estimated 0.48in. Wind will be moderate, blowing around 11mph on average and gusts of 23.5mph at 8 AM. High humidity with average of 82% is anticipated, the maximum being 94% at 11 PM and 72% being its lowest at 2 PM. Barometric pressure is its highest of 30.01inHg at 12 AM, a lowest point of 29.87inHg at 6 PM with an avg 29.95inHg.
Gridley, IL Weather – 9-10 – Sunny
74° / 61°
Sunny
A sunny day is in the forecast for Gridley, with a high of 74°F and a low of 61°F. There's a moderate 36% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 12mph on average and gusts of 19.8mph at 4 AM. The humidity will be on the higher side, averaging about 69%, the maximum being 96% at 1 AM and 44% being its lowest at 2 PM. Barometric pressure is its highest of 30.02inHg at 10 PM, a lowest point of 29.89inHg at 3 AM with an avg 29.97inHg.
Gridley, IL Weather – 9-11 – Sunny
79° / 57°
Sunny
It will be sunny in Gridley, with a high of 79°F and a low of 57°F. There's a very small chance of rainfall, only about 6%. Wind will be moderate, blowing around 11mph on average and gusts of 27.1mph at 10 PM. The humidity will be on the higher side, averaging about 61%, the maximum being 77% at 7 AM and 44% being its lowest at 4 PM. Barometric pressure is its highest of 30.03inHg at 7 AM, a lowest point of 29.88inHg at 7 PM with an avg 29.97inHg.

Currently

Partly Cloudy 81°F
30.01 inHg.
Barometer
44%
Humidity
E 14.8 mph
Wind
Partly Cloudy

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