Keystone climate

Keystone Weather in August

NOAA 1991-2020 normals for Belle Plaine, 14.5 km from Keystone

Average highs run from 83°F on August 1 to 80°F on August 31, and lows from 62°F to 57°F. Normal precipitation for the month is 4.08 in over about 9 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 Keystone, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
82°F
Average low
60°F
Precipitation
4.08 in
Record high
104°FAug 1, 1988
Record low
36°FAug 20, 1950
Chance of a freeze
0%
Days of 90°F or more
3.4
Daylight
14 h 25 min to 13 h 11 min
Cloud cover
52%
Humidity
73%
Dew point
62°F
Wind
7.8 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 183°F62°F104°F 198844°F 197727%0%
Aug 283°F62°F100°F 198849°F 198527%0%
Aug 383°F62°F102°F 194746°F 197627%0%
Aug 483°F62°F101°F 194740°F 197827%0%
Aug 583°F62°F102°F 194745°F 197827%0%
Aug 683°F62°F97°F 194745°F 194827%0%
Aug 783°F62°F97°F 198846°F 198928%0%
Aug 883°F62°F97°F 198840°F 190428%0%
Aug 983°F62°F95°F 200546°F 197228%0%
Aug 1083°F61°F98°F 194747°F 202428%0%
Aug 1183°F61°F97°F 194740°F 198228%0%
Aug 1283°F61°F98°F 194743°F 198228%0%
Aug 1383°F61°F97°F 194443°F 196428%0%
Aug 1483°F61°F100°F 198840°F 196428%0%
Aug 1582°F61°F103°F 198844°F 200428%0%
Aug 1682°F61°F103°F 198844°F 200428%0%
Aug 1782°F60°F103°F 198845°F 194228%0%
Aug 1882°F60°F100°F 194744°F 194328%0%
Aug 1982°F60°F100°F 194746°F 196328%0%
Aug 2082°F60°F101°F 194736°F 195028%0%
Aug 2182°F60°F101°F 194741°F 195028%0%
Aug 2282°F59°F100°F 194746°F 202427%0%
Aug 2382°F59°F101°F 194744°F 195227%0%
Aug 2481°F59°F102°F 194741°F 194227%0%
Aug 2581°F59°F97°F 202340°F 195827%0%
Aug 2681°F58°F96°F 195543°F 202527%0%
Aug 2781°F58°F99°F 195544°F 197127%0%
Aug 2881°F58°F98°F 195539°F 198227%0%
Aug 2981°F58°F99°F 194841°F 198627%0%
Aug 3080°F57°F100°F 195346°F 194926%0%
Aug 3180°F57°F99°F 195341°F 196726%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Keystone, 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 6:02 AM, sunset 8:27 PM
August 31
sunrise 6:33 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 USC00130600 (Belle Plaine), public domain. Records: NOAA GHCN-Daily, station USC00138568, 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.