Castle Rock climate

Castle Rock Weather in August

NOAA 1991-2020 normals for Castle Rock, 6.1 km from Castle Rock

Average highs run from 85°F on August 1 to 82°F on August 31, and lows from 57°F to 52°F. Normal precipitation for the month is 2.52 in over about 10 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 Castle Rock, 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
55°F
Precipitation
2.52 in
Record high
100°FAug 1, 2008
Record low
38°FAug 26, 2014
Chance of a freeze
0%
Days of 90°F or more
6.0
Daylight
14 h 12 min to 13 h 05 min
Cloud cover
50%
Humidity
47%
Dew point
44°F
Wind
7.4 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 185°F57°F100°F 200849°F 200932%0%
Aug 285°F57°F100°F 202650°F 199832%0%
Aug 385°F57°F98°F 202653°F 201732%0%
Aug 485°F56°F97°F 202453°F 200932%0%
Aug 585°F56°F97°F 202251°F 202632%0%
Aug 685°F56°F96°F 202650°F 200032%0%
Aug 785°F56°F96°F 200350°F 199832%0%
Aug 885°F56°F99°F 202654°F 200532%0%
Aug 985°F56°F96°F 200052°F 201332%0%
Aug 1084°F56°F93°F 201652°F 201332%0%
Aug 1184°F56°F95°F 200051°F 202532%0%
Aug 1284°F56°F92°F 200750°F 200432%0%
Aug 1384°F55°F95°F 202046°F 200232%0%
Aug 1484°F55°F95°F 202550°F 200432%0%
Aug 1584°F55°F95°F 201548°F 200831%0%
Aug 1684°F55°F98°F 200249°F 200831%0%
Aug 1784°F55°F95°F 202046°F 200931%0%
Aug 1884°F55°F97°F 202049°F 200831%0%
Aug 1983°F54°F96°F 201948°F 201631%
Aug 2083°F54°F97°F 201945°F 201830%
Aug 2183°F54°F96°F 202650°F 200930%
Aug 2283°F54°F95°F 200950°F 200530%
Aug 2383°F54°F97°F 202047°F 201530%
Aug 2483°F54°F97°F 201150°F 201629%
Aug 2583°F53°F95°F 201945°F 201629%
Aug 2682°F53°F93°F 201538°F 201428%
Aug 2782°F53°F94°F 201145°F 200428%
Aug 2882°F53°F94°F 201242°F 200428%
Aug 2982°F53°F93°F 201346°F 200627%
Aug 3082°F52°F93°F 201250°F 200227%
Aug 3182°F52°F95°F 201145°F 202026%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Castle Rock, 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 (MDT).

August 1
sunrise 5:59 AM, sunset 8:11 PM
August 31
sunrise 6:27 AM, sunset 7:32 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00051401 (Castle Rock), public domain. Records: NOAA GHCN-Daily, station USW00093067, 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.