Johnson County climate

Johnson County Weather in August

NOAA 1991-2020 normals for Billy Creek, 15.1 km from Johnson County

Average highs run from 87°F on August 1 to 81°F on August 31, and lows from 55°F to 49°F. Normal precipitation for the month is 0.84 in over about 6 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.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
84°F
Average low
53°F
Precipitation
0.84 in
Record high
103°FAug 3, 2001
Record low
36°FAug 17, 2002
Chance of a freeze
3%
Days of 90°F or more
10.1
Daylight
14 h 35 min to 13 h 15 min
Cloud cover
46%
Humidity
41%
Dew point
44°F
Wind
8.3 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 187°F55°F101°F 200846°F 200924%0%
Aug 287°F55°F99°F 201649°F 199923%0%
Aug 386°F55°F103°F 200146°F 202623%0%
Aug 486°F55°F97°F 202244°F 202623%0%
Aug 586°F55°F93°F 200149°F 200523%0%
Aug 686°F55°F101°F 200150°F 201823%0%
Aug 786°F55°F94°F 200348°F 201722%0%
Aug 886°F55°F94°F 199946°F 200222%0%
Aug 986°F54°F97°F 200044°F 200222%0%
Aug 1085°F54°F100°F 202246°F 200422%0%
Aug 1185°F54°F101°F 201841°F 200421%0%
Aug 1285°F54°F100°F 201843°F 200521%0%
Aug 1385°F54°F100°F 200044°F 200521%0%
Aug 1485°F54°F98°F 201541°F 200521%0%
Aug 1584°F53°F98°F 201546°F 200220%0%
Aug 1684°F53°F99°F 200341°F 200220%0%
Aug 1784°F53°F98°F 202036°F 200220%0%
Aug 1884°F53°F96°F 202043°F 201519%0%
Aug 1984°F52°F97°F 202541°F 201519%0%
Aug 2083°F52°F99°F 202544°F 201619%0%
Aug 2183°F52°F97°F 202345°F 202119%0%
Aug 2283°F52°F96°F 200640°F 201518%0%
Aug 2383°F51°F94°F 200036°F 201518%0%
Aug 2483°F51°F96°F 202043°F 200418%0%
Aug 2582°F51°F97°F 200845°F 201418%0%
Aug 2682°F50°F95°F 200742°F 200418%0%
Aug 2782°F50°F96°F 201141°F 200418%0%
Aug 2882°F50°F97°F 201244°F 200818%0%
Aug 2981°F50°F99°F 201242°F 202418%0%
Aug 3081°F49°F96°F 200840°F 202019%0%
Aug 3181°F49°F94°F 200739°F 200519%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.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

August 1
sunrise 5:55 AM, sunset 8:30 PM
August 31
sunrise 6:29 AM, sunset 7:44 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00480740 (Billy Creek), public domain. Records: NOAA GHCN-Daily, station USW00094054, 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.