De Kalb climate

De Kalb Weather in August

NOAA 1991-2020 normals for Dekalb, 3.3 km from De Kalb

Average highs run from 95°F on August 1 to 92°F on August 31, and lows from 70°F to 67°F. Normal precipitation for the month is 3.03 in over about 5 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at De Kalb, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
94°F
Average low
69°F
Precipitation
3.03 in
Record high
114°FAug 10, 1936
Record low
49°FAug 12, 1967
Chance of a freeze
0%
Days of 90°F or more
25.4
Daylight
13 h 47 min to 12 h 53 min
Cloud cover
44%
Humidity
61%
Dew point
68°F
Wind
5.6 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 195°F70°F108°F 199852°F 197115%0%
Aug 295°F70°F109°F 199859°F 196515%0%
Aug 395°F70°F110°F 199860°F 191515%0%
Aug 495°F70°F108°F 199858°F 197415%0%
Aug 595°F70°F109°F 195657°F 194815%0%
Aug 695°F70°F110°F 195659°F 194816%0%
Aug 795°F70°F108°F 195455°F 195716%0%
Aug 895°F70°F110°F 194759°F 191516%0%
Aug 995°F70°F113°F 194756°F 198916%0%
Aug 1095°F69°F114°F 193656°F 198916%0%
Aug 1195°F69°F109°F 191156°F 198916%0%
Aug 1295°F69°F107°F 195449°F 196716%0%
Aug 1395°F69°F108°F 193455°F 196716%0%
Aug 1495°F69°F105°F 193455°F 196716%0%
Aug 1595°F69°F108°F 195653°F 192916%0%
Aug 1695°F69°F111°F 194354°F 199216%0%
Aug 1794°F69°F108°F 195154°F 199216%0%
Aug 1894°F69°F106°F 195256°F 199216%0%
Aug 1994°F68°F112°F 201157°F 194016%0%
Aug 2094°F68°F112°F 201152°F 194016%0%
Aug 2194°F68°F105°F 194853°F 194016%0%
Aug 2294°F68°F106°F 198053°F 195616%0%
Aug 2394°F68°F104°F 194353°F 195616%0%
Aug 2493°F68°F104°F 194358°F 195616%0%
Aug 2593°F68°F104°F 193855°F 196616%0%
Aug 2693°F67°F104°F 196356°F 201517%0%
Aug 2793°F67°F108°F 194352°F 201017%0%
Aug 2893°F67°F106°F 199853°F 199217%0%
Aug 2993°F67°F107°F 199854°F 198617%0%
Aug 3092°F67°F106°F 195156°F 191517%0%
Aug 3192°F67°F106°F 193950°F 191517%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at De Kalb, in percent, and of at least 0.1 inch of snowfall.051015201102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:31 AM, sunset 8:18 PM
August 31
sunrise 6:52 AM, sunset 7:45 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00412352 (Dekalb), public domain. Records: NOAA GHCN-Daily, station USC00344451, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.