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Frederick, IL Weather Tomorrow

Get a closer look at tomorrow's weather in Frederick and the upcoming 5 day forecast with 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 across the Frederick area and around Schuyler county, Illinois.
Updated: Sat Aug 29th 2026 9:00 AM CDT
Frederick, IL Weather – 8-29 – Overcast
88° / 61°
Overcast
In Frederick, cloud-filled skies are likely with a high near 88°F and a low around 61°F. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 15mph on average and gusts of 32.9mph at 11 PM. The humidity will be on the higher side, averaging about 63%, the maximum being 68% at 10 AM and 32% being its lowest at 4 PM. Barometric pressure is its highest of 30.09inHg at 10 AM, a lowest point of 29.94inHg at 6 PM with an avg 30inHg.
Frederick, IL Weather – 8-30 – Overcast
100° / 73°

Weather Tomorrow

Overcast
Highs will reach 100°F with lows near 73°F in Frederick, where overcast is. There's a moderate 36% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 19mph on average and gusts of 36.1mph at 11 PM. Humidity levels should be comfortable, sitting around 37% on average, the maximum being 61% at 7 AM and 19% being its lowest at 3 PM. Barometric pressure is its highest of 29.97inHg at 8 AM, a lowest point of 29.84inHg at 6 PM with an avg 29.91inHg.
Frederick, IL Weather – 8-31 – Overcast
105° / 78°
Overcast
In Frederick, skies will be overcast with highs near 105°F and lows around 78°F. There's a very small chance of rainfall, only about 6%. Wind will be moderate, blowing around 18mph on average and gusts of 37.2mph at 2 AM. Humidity levels should be comfortable, sitting around 32% on average, the maximum being 48% at 7 AM and 19% being its lowest at 3 PM. Barometric pressure is its highest of 29.89inHg at 9 AM, a lowest point of 29.79inHg at 6 PM with an avg 29.84inHg.
Frederick, IL Weather – 9-1 – Overcast
107° / 81°
Overcast
In Frederick, skies will be overcast with highs near 107°F and lows around 81°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 17mph on average and gusts of 39mph at 1 AM. Humidity levels should be comfortable, sitting around 33% on average, the maximum being 52% at 7 AM and 17% being its lowest at 6 PM. Barometric pressure is its highest of 29.9inHg at 9 AM, a lowest point of 29.79inHg at 6 PM with an avg 29.85inHg.
Frederick, IL Weather – 9-2 – Sunny
106° / 81°
Sunny
Bright and sunny conditions in Frederick, with a high of 106°F and a low of 81°F. There's a very small chance of rainfall, only about 4% with an estimated 0in. Wind will be moderate, blowing around 19mph on average and gusts of 40.5mph at 3 AM. Humidity levels should be comfortable, sitting around 37% on average, the maximum being 56% at 7 AM and 20% being its lowest at 1 PM. Barometric pressure is its highest of 29.89inHg at 7 AM, a lowest point of 29.81inHg at 6 PM with an avg 29.85inHg.
Frederick, IL Weather – 9-3 – Sunny
108° / 79°
Sunny
Highs will reach 108°F with lows near 79°F in Frederick, where sunshine is. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 11mph on average and gusts of 22.4mph at 10 PM. Humidity levels should be comfortable, sitting around 44% on average, the maximum being 66% at 4 AM and 17% being its lowest at 4 PM. Barometric pressure is its highest of 29.94inHg at 9 AM, a lowest point of 29.82inHg at 4 PM with an avg 29.89inHg.

Currently

Overcast 71°F
30.11 inHg.
Barometer
73%
Humidity
S 15.8 mph
Wind
Overcast

5 Day Forecast Nearby

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