Johnson County climate

Johnson County Weather in August

NOAA 1991-2020 normals for Tecumseh 1S, 7.4 km from Johnson County

Average highs run from 88°F on August 1 to 84°F on August 31, and lows from 65°F to 59°F. Normal precipitation for the month is 3.65 in over about 8 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 Johnson County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
86°F
Average low
63°F
Precipitation
3.65 in
Record high
106°FAug 7, 2012
Record low
44°FAug 23, 1966
Chance of a freeze
0%
Days of 90°F or more
10.0
Daylight
14 h 17 min to 13 h 06 min
Cloud cover
49%
Humidity
67%
Dew point
62°F
Wind
8.7 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 188°F65°F102°F 201251°F 197129%0%
Aug 288°F65°F102°F 196455°F 197329%0%
Aug 388°F65°F105°F 196452°F 197429%0%
Aug 488°F65°F102°F 198346°F 197428%0%
Aug 588°F65°F97°F 200846°F 197428%0%
Aug 688°F65°F100°F 197948°F 197428%0%
Aug 788°F64°F106°F 201249°F 198928%0%
Aug 887°F64°F101°F 198049°F 198928%0%
Aug 987°F64°F101°F 198050°F 197227%0%
Aug 1087°F64°F101°F 198050°F 197227%0%
Aug 1187°F64°F101°F 198350°F 196727%0%
Aug 1287°F64°F97°F 201046°F 196427%0%
Aug 1387°F63°F101°F 196547°F 196427%0%
Aug 1487°F63°F99°F 196550°F 200427%0%
Aug 1587°F63°F98°F 201250°F 199227%0%
Aug 1686°F63°F100°F 198850°F 199226%0%
Aug 1786°F63°F106°F 198351°F 201326%0%
Aug 1886°F62°F105°F 198353°F 202326%0%
Aug 1986°F62°F102°F 198349°F 196726%0%
Aug 2086°F62°F98°F 197248°F 196726%0%
Aug 2186°F62°F99°F 197248°F 196726%0%
Aug 2286°F62°F98°F 197553°F 196625%0%
Aug 2385°F61°F99°F 197544°F 196625%0%
Aug 2485°F61°F99°F 197549°F 196625%0%
Aug 2585°F61°F102°F 200348°F 201525%0%
Aug 2685°F60°F101°F 198051°F 202525%0%
Aug 2785°F60°F101°F 197647°F 196725%0%
Aug 2884°F60°F99°F 198444°F 198625%0%
Aug 2984°F59°F100°F 200044°F 198625%0%
Aug 3084°F59°F101°F 201249°F 200925%0%
Aug 3184°F59°F98°F 200045°F 200925%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Johnson County, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:23 AM, sunset 8:40 PM
August 31
sunrise 6:52 AM, sunset 7:58 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00258465 (Tecumseh 1S), public domain. Records: NOAA GHCN-Daily, station USC00255810, 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.