Decatur, Illinois, United States Climate

Weather: 17.44°C/63.39°F, Wind SW at 6.69 km/h, 82% Humidity, 0% Chance of rain

United States
(Photo by Andres Garcia on Unsplash)
Contents

Decatur Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Decatur has a Humid continental, no dry season, hot summer climate (Classification: Dfa). The district’s yearly temperature is 12.52ºC (54.54ºF) and it is -0.12% lower than United States’s averages. Decatur typically receives about 27.94 millimeters (1.1 inches) of precipitation and has 41.72 rainy days (11.43% of the time) annually.

CountryUnited States
CityIllinois
Longitude-88.9548001
Latitude39.8403147
Attitude/ElevationNonem (0ft)
Local timeFriday 23:48
Annual high temperature15.5ºC (59.9ºF)
Annual low temperature7.72ºC (45.9ºF)
Average annual precip.27.94mm (1.1in)
Warmest monthJuly (27.38ºC / 81.28ºF)
Coldest MonthJanuary (-5.71ºC / 21.72ºF)
Wettest MonthJune (46.84mm / 1.84in)
Driest MonthNovember (15.79mm / 0.62in)
Number of days with rainfall (≥ 1.0 mm)41.72 days (11.43%)
Days with no rain323.28 days (88.57%)
Humidity76.08%

Climate Decatur: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)15.0(59.0)19.0(66.2)22.0(71.6)25.0(77.0)34.0(93.2)32.0(89.6)32.0(89.6)31.0(87.8)31.0(87.8)31.0(87.8)23.0(73.4)16.0(60.8)34.0(93.2)
Average high °C (°F)0.89(33.6)3.52(38.34)9.01(48.22)14.28(57.7)23.16(73.69)26.64(79.95)27.38(81.28)26.3(79.34)25.07(77.13)16.66(61.99)8.17(46.71)4.98(40.96)15.5(59.9)
Daily mean °C (°F)-1.6(29.12)0.72(33.3)5.96(42.73)10.87(51.57)19.99(67.98)23.6(74.48)24.67(76.41)23.26(73.87)21.38(70.48)13.41(56.14)5.42(41.76)2.54(36.57)12.52(54.54)
Average low °C (°F)-5.71(21.72)-3.56(25.59)1.59(34.86)5.6(42.08)14.42(57.96)17.81(64.06)19.37(66.87)18.03(64.45)16.12(61.02)8.38(47.08)1.49(34.68)-0.92(30.34)7.72(45.9)
Record low °C (°F)-29.0(-20.2)-16.0(3.2)-16.0(3.2)-8.0(17.6)1.0(33.8)10.0(50.0)13.0(55.4)11.0(51.8)6.0(42.8)-3.0(26.6)-14.0(6.8)-13.0(8.6)-29.0(-20.2)
Average precipitation mm (inches)23.95(0.94)19.56(0.77)27.92(1.1)32.35(1.27)33.8(1.33)46.84(1.84)37.93(1.49)35.78(1.41)25.72(1.01)19.79(0.78)15.79(0.62)15.81(0.62)27.94(1.1)
Average precipitation days (≥ 1.0 mm)2.272.913.093.364.915.184.914.363.552.552.452.183.48
Average relative humidity (%)78.2374.9570.069.574.2579.0785.7585.8378.1468.1873.375.7676.08
Mean monthly sunshine hours6.58.239.029.6712.6313.4613.5611.210.539.386.76.799.81

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Decatur in recent years.

Decatur

Decatur Temperature by Month

July
24.67°C | 76.41°F
June
23.6°C | 74.48°F
August
23.26°C | 73.87°F
September
21.38°C | 70.48°F
May
19.99°C | 67.98°F
October
13.41°C | 56.14°F
April
10.87°C | 51.57°F
March
5.96°C | 42.73°F
November
5.42°C | 41.76°F
December
2.54°C | 36.57°F
February
0.72°C | 33.3°F
January
-1.6°C | 29.12°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature29.0°C (84.2°F)23.5°C (74.3°F)16.0°C (60.8°F)
Avg Temperature25.0°C (77.0°F)19.5°C (67.1°F)12.0°C (53.6°F)
Min Temperature20.0°C (68.0°F)14.0°C (57.2°F)6.0°C (42.8°F)
Dew PointMaxAverageMin
Dew Point21.0°C (69.8°F)13.17°C (55.71°F)4.0°C (39.2°F)
PrecipitationMaxAverageMinSum
Precipitation11.6mm | 0.46in1.06mm | 0.04in0.0mm | 0in31.8mm | 1.25in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind21.0kmh | 13.05mph13.37kmh | 8.31mph7.0kmh | 4.35mph
Gust Wind32.0kmh | 19.88mph21.07kmh | 13.09mph12.0kmh | 7.46mph
Sea Level PressureMaxAverageMin
Sea Level Pressure11.6mb1.06mb0.0mb
Decatur

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
September° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2020-09-0123 | 73.421 | 69.88912 | 7.4629.83 | 10103.8 | 0.15
2020-09-0224 | 75.221 | 69.8907 | 4.3529.83 | 10107.5 | 0.3
2020-09-0325 | 77.017 | 62.67215 | 9.3229.83 | 10100.0 | 0.0
2020-09-0419 | 66.29 | 48.2617 | 4.3530.15 | 10210.0 | 0.0
2020-09-0521 | 69.812 | 53.66516 | 9.9430.21 | 10230.0 | 0.0
2020-09-0623 | 73.418 | 64.47920 | 12.4330.0 | 10161.7 | 0.07
2020-09-0722 | 71.617 | 62.67420 | 12.4329.85 | 10110.1 | 0.0
2020-09-0824 | 75.220 | 68.08412 | 7.4629.91 | 10133.5 | 0.14
2020-09-0924 | 75.219 | 66.2828 | 4.9730.09 | 10191.5 | 0.06
2020-09-1019 | 66.216 | 60.88617 | 10.5630.3 | 10260.0 | 0.0
2020-09-1119 | 66.216 | 60.88615 | 9.3230.18 | 10220.0 | 0.0
2020-09-1221 | 69.817 | 62.68211 | 6.8429.94 | 10141.2 | 0.05
2020-09-1320 | 68.016 | 60.88713 | 8.0830.0 | 10160.0 | 0.0
2020-09-1420 | 68.015 | 59.08113 | 8.0830.27 | 10250.0 | 0.0
2020-09-1518 | 64.411 | 51.87010 | 6.2130.21 | 10230.0 | 0.0
2020-09-1621 | 69.812 | 53.6667 | 4.3530.03 | 10170.0 | 0.0
2020-09-1720 | 68.014 | 57.27615 | 9.3230.09 | 10190.2 | 0.01
2020-09-1814 | 57.26 | 42.86217 | 10.5630.27 | 10250.0 | 0.0
2020-09-1913 | 55.44 | 39.26212 | 7.4630.33 | 10270.0 | 0.0
2020-09-2016 | 60.86 | 42.86313 | 8.0830.33 | 10270.0 | 0.0
2020-09-2117 | 62.68 | 46.46411 | 6.8430.3 | 10260.0 | 0.0
2020-09-2218 | 64.411 | 51.87111 | 6.8430.18 | 10220.0 | 0.0
2020-09-2319 | 66.212 | 53.6719 | 5.5930.06 | 10180.0 | 0.0
2020-09-2419 | 66.212 | 53.67313 | 8.0829.94 | 10140.0 | 0.0
2020-09-2520 | 68.013 | 55.4768 | 4.9729.94 | 10140.0 | 0.0
2020-09-2623 | 73.416 | 60.87721 | 13.0529.85 | 10110.0 | 0.0
2020-09-2722 | 71.616 | 60.87621 | 13.0529.77 | 10080.7 | 0.03
2020-09-2814 | 57.29 | 48.27917 | 10.5629.88 | 101211.6 | 0.46
2020-09-2912 | 53.65 | 41.07112 | 7.4629.97 | 10150.0 | 0.0
2020-09-3015 | 59.06 | 42.86318 | 11.1829.83 | 10100.0 | 0.0

Decatur 3 Year Historical Weather Data

Nearby locations

Comments (0)

  • Latest first
  • Highest rated
Be the first to comment on this page