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Decatur, IA Weather Tomorrow

Get a closer look at tomorrow's weather in Decatur 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 Decatur area.
Updated: Fri Sep 4th 2026 6:45 AM CDT
Decatur, IA Weather – 9-4 – Sunny
103° / 76°
Sunny
In Decatur, it will be sunny with highs near 103°F and lows around 76°F. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 17mph on average and gusts of 30.2mph at 8 AM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 68% at 8 AM and 21% being its lowest at 3 PM. Barometric pressure is its highest of 29.87inHg at 8 AM, a lowest point of 29.76inHg at 5 PM with an avg 29.82inHg.
Decatur, IA Weather – 9-5 – Overcast
105° / 80°

Weather Tomorrow

Overcast
In Decatur, it will be overcast with highs near 105°F and lows around 80°F. There's a very small chance of rainfall, only about 6%. Wind will be moderate, blowing around 14mph on average and gusts of 27.8mph at 9 PM. Humidity levels should be comfortable, sitting around 37% on average, the maximum being 62% at 12 AM and 16% being its lowest at 4 PM. Barometric pressure is its highest of 29.91inHg at 11 PM, a lowest point of 29.8inHg at 5 PM with an avg 29.86inHg.
Decatur, IA Weather – 9-6 – Sunny
99° / 71°
Sunny
In Decatur, a sunny day is likely with a high near 99°F and a low around 71°F. Rainfall predicted to have a 64% chance with an estimated 0.19in. Winds will be strong at speeds peaking at 23mph and gusts of 39.6mph at 9 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 98% at 7 AM and 25% being its lowest at 5 PM. Barometric pressure is its highest of 29.98inHg at 10 AM, a lowest point of 29.81inHg at 6 PM with an avg 29.93inHg.
Decatur, IA Weather – 9-7 – Overcast
88° / 66°
Overcast
Skies will be overcast in Decatur, with a high of 88°F and a low of 66°F. Rainfall predicted to have a 57% chance with an estimated 0.08in. Wind will be moderate, blowing around 19mph on average and gusts of 37.8mph at 1 AM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 88% at 7 AM and 34% being its lowest at 10 PM. Barometric pressure is its highest of 30.01inHg at 9 AM, a lowest point of 29.84inHg at 6 PM with an avg 29.94inHg.
Decatur, IA Weather – 9-8 – Sunny
106° / 75°
Sunny
Highs will reach 106°F with lows near 75°F in Decatur, where a sunny day is. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 19mph on average and gusts of 39.4mph at 1 AM. Humidity levels should be comfortable, sitting around 32% on average, the maximum being 52% at 6 AM and 15% being its lowest at 4 PM. Barometric pressure is its highest of 29.96inHg at 2 AM, a lowest point of 29.77inHg at 7 PM with an avg 29.87inHg.
Decatur, IA Weather – 9-9 – Sunny
104° / 87°
Sunny
Decatur could see sunshine with daytime highs of 104°F and nighttime lows near 87°F. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 15mph on average and gusts of 34.7mph at 7 AM. The air will be relatively dry with average humidity levels below 30%, the maximum being 38% at 1 AM and 18% being its lowest at 4 PM. Barometric pressure is its highest of 29.95inHg at 10 AM, a lowest point of 29.85inHg at 5 PM with an avg 29.89inHg.

Currently

Clear 76°F
29.84 inHg.
Barometer
72%
Humidity
SW 16.2 mph
Wind
Clear

5 Day Forecast Nearby

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