Annual Weather Averages Near Decatur
Averages are for Decatur Airport, which is 5 miles from Decatur.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Decatur
High Temp: 86 °F
Low Temp: 20 °F
Mean Temp: 53 °F
Precipitation: 3.10"
Humidity: 72%
Dew Point: 44 °F
Wind: 16 mph
Pressure: 30.04 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Decatur
High Temp: 36 °F
Low Temp: 20 °F
Mean Temp: 28 °F
Precipitation: 2.06"
Humidity: 79%
Dew Point: 22 °F
Wind: 19 mph
Pressure: 30.13 "Hg
Visibility: 8 mi
February Climate & Weather Averages in Decatur
High Temp: 40 °F
Low Temp: 23 °F
Mean Temp: 32 °F
Precipitation: 1.84"
Humidity: 76%
Dew Point: 24 °F
Wind: 19 mph
Pressure: 30.12 "Hg
Visibility: 9 mi
March Climate & Weather Averages in Decatur
High Temp: 52 °F
Low Temp: 32 °F
Mean Temp: 42 °F
Precipitation: 2.57"
Humidity: 70%
Dew Point: 32 °F
Wind: 19 mph
Pressure: 30.08 "Hg
Visibility: 10 mi
April Climate & Weather Averages in Decatur
High Temp: 65 °F
Low Temp: 42 °F
Mean Temp: 53 °F
Precipitation: 3.66"
Humidity: 66%
Dew Point: 41 °F
Wind: 20 mph
Pressure: 29.97 "Hg
Visibility: 10 mi
May Climate & Weather Averages in Decatur
High Temp: 75 °F
Low Temp: 53 °F
Mean Temp: 64 °F
Precipitation: 4.24"
Humidity: 68%
Dew Point: 53 °F
Wind: 17 mph
Pressure: 29.97 "Hg
Visibility: 10 mi
June Climate & Weather Averages in Decatur
High Temp: 84 °F
Low Temp: 63 °F
Mean Temp: 73 °F
Precipitation: 4.48"
Humidity: 70%
Dew Point: 62 °F
Wind: 14 mph
Pressure: 29.95 "Hg
Visibility: 10 mi
July Climate & Weather Averages in Decatur
High Temp: 86 °F
Low Temp: 65 °F
Mean Temp: 76 °F
Precipitation: 3.87"
Humidity: 73%
Dew Point: 66 °F
Wind: 11 mph
Pressure: 29.98 "Hg
Visibility: 10 mi
August Climate & Weather Averages in Decatur
High Temp: 85 °F
Low Temp: 63 °F
Mean Temp: 74 °F
Precipitation: 3.05"
Humidity: 74%
Dew Point: 65 °F
Wind: 11 mph
Pressure: 30.01 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Decatur
High Temp: 80 °F
Low Temp: 56 °F
Mean Temp: 68 °F
Precipitation: 3.03"
Humidity: 69%
Dew Point: 56 °F
Wind: 12 mph
Pressure: 30.04 "Hg
Visibility: 10 mi
October Climate & Weather Averages in Decatur
High Temp: 67 °F
Low Temp: 45 °F
Mean Temp: 56 °F
Precipitation: 3.15"
Humidity: 69%
Dew Point: 45 °F
Wind: 16 mph
Pressure: 30.06 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Decatur
High Temp: 52 °F
Low Temp: 34 °F
Mean Temp: 43 °F
Precipitation: 2.99"
Humidity: 73%
Dew Point: 34 °F
Wind: 18 mph
Pressure: 30.11 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Decatur
High Temp: 41 °F
Low Temp: 25 °F
Mean Temp: 33 °F
Precipitation: 2.26"
Humidity: 79%
Dew Point: 27 °F
Wind: 18 mph
Pressure: 30.11 "Hg
Visibility: 9 mi