Custer County climate

Custer County Weather in August

NOAA 1991-2020 normals for Mizpah 4 Nnw, 21.8 km from Custer County

Average highs run from 94°F on August 1 to 86°F on August 31, and lows from 57°F to 48°F. Normal precipitation for the month is 1.02 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 Custer County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
91°F
Average low
53°F
Precipitation
1.02 in
Record high
110°FAug 7, 1949
Record low
35°FAug 22, 1966
Chance of a freeze
8%
Days of 90°F or more
17.6
Daylight
14 h 48 min to 13 h 21 min
Cloud cover
46%
Humidity
45%
Dew point
48°F
Wind
9.6 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 194°F57°F106°F 202646°F 200220%0%
Aug 294°F56°F105°F 202448°F 200620%0%
Aug 394°F56°F106°F 194744°F 197820%0%
Aug 494°F56°F105°F 194742°F 202620%0%
Aug 594°F56°F104°F 196145°F 202620%0%
Aug 693°F56°F107°F 194948°F 195920%0%
Aug 793°F56°F110°F 194947°F 193920%0%
Aug 893°F56°F105°F 194742°F 193919%0%
Aug 993°F55°F104°F 194046°F 198519%0%
Aug 1093°F55°F104°F 196946°F 193919%0%
Aug 1193°F55°F107°F 200342°F 195219%0%
Aug 1292°F55°F105°F 200346°F 200219%0%
Aug 1392°F54°F107°F 193745°F 200219%0%
Aug 1492°F54°F105°F 200345°F 195919%0%
Aug 1592°F54°F105°F 200345°F 197419%0%
Aug 1691°F53°F107°F 200343°F 201219%0%
Aug 1791°F53°F104°F 195839°F 200219%0%
Aug 1891°F53°F103°F 194846°F 201919%0%
Aug 1991°F52°F102°F 202540°F 195019%0%
Aug 2090°F52°F100°F 196944°F 193819%0%
Aug 2190°F52°F102°F 196941°F 194519%0%
Aug 2290°F51°F103°F 197135°F 196619%0%
Aug 2389°F51°F103°F 196935°F 201519%0%
Aug 2489°F51°F103°F 195343°F 199219%0%
Aug 2589°F50°F103°F 195236°F 199219%0%
Aug 2688°F50°F102°F 193943°F 196719%0%
Aug 2788°F50°F102°F 193744°F 198819%0%
Aug 2888°F49°F102°F 201243°F 194620%0%
Aug 2987°F49°F101°F 199541°F 196520%0%
Aug 3087°F49°F105°F 194840°F 199220%0%
Aug 3186°F48°F101°F 198341°F 202020%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Custer 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 5:44 AM, sunset 8:32 PM
August 31
sunrise 6:22 AM, sunset 7:43 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00245754 (Mizpah 4 Nnw), public domain. Records: NOAA GHCN-Daily, station USW00024037, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.