Riley County climate

Riley County Weather in August

NOAA 1991-2020 normals for Tuttle Creek Lake, 12.9 km from Riley County

Average highs run from 90°F on August 1 to 85°F on August 31, and lows from 67°F to 61°F. Normal precipitation for the month is 4.20 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 Riley County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
88°F
Average low
65°F
Precipitation
4.20 in
Record high
115°FAug 19, 2023
Record low
45°FAug 12, 1964
Chance of a freeze
0%
Days of 90°F or more
13.7
Daylight
14 h 12 min to 13 h 04 min
Cloud cover
47%
Humidity
67%
Dew point
63°F
Wind
8.5 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 190°F67°F109°F 201157°F 200930%0%
Aug 290°F67°F109°F 201153°F 200930%0%
Aug 390°F67°F107°F 196456°F 202130%0%
Aug 490°F67°F107°F 200852°F 202030%0%
Aug 590°F67°F104°F 196356°F 201230%0%
Aug 690°F66°F108°F 200655°F 200530%0%
Aug 789°F66°F102°F 202251°F 200430%0%
Aug 889°F66°F107°F 200051°F 199730%0%
Aug 989°F66°F109°F 200653°F 202429%0%
Aug 1089°F66°F106°F 201058°F 201229%0%
Aug 1189°F66°F103°F 202350°F 200429%0%
Aug 1289°F66°F106°F 200045°F 196429%0%
Aug 1389°F65°F108°F 200050°F 200429%0%
Aug 1489°F65°F103°F 200747°F 200429%0%
Aug 1589°F65°F105°F 200754°F 200628%0%
Aug 1688°F65°F105°F 200056°F 200428%0%
Aug 1788°F65°F104°F 200348°F 201228%0%
Aug 1888°F64°F105°F 200351°F 201228%0%
Aug 1988°F64°F115°F 202348°F 200127%0%
Aug 2088°F64°F105°F 200347°F 201227%0%
Aug 2188°F64°F109°F 202348°F 200427%0%
Aug 2287°F64°F107°F 202350°F 200927%0%
Aug 2387°F63°F106°F 200050°F 196127%0%
Aug 2487°F63°F108°F 202349°F 201526%0%
Aug 2587°F63°F110°F 200051°F 201526%0%
Aug 2687°F63°F103°F 202150°F 202526%0%
Aug 2786°F62°F108°F 200050°F 202526%0%
Aug 2886°F62°F109°F 200051°F 200926%0%
Aug 2986°F62°F102°F 200050°F 200426%0%
Aug 3086°F61°F106°F 200046°F 200926%0%
Aug 3185°F61°F109°F 200046°F 200926%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Riley County, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

August 1
sunrise 6:27 AM, sunset 8:39 PM
August 31
sunrise 6:55 AM, sunset 7:59 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00148259 (Tuttle Creek Lake), public domain. Records: NOAA GHCN-Daily, station USW00003936, 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.