Westminster Weather in August
Average highs run from 84°F on August 1 to 85°F on August 31, and lows from 65°F to 65°F. Normal precipitation for the month is 0.00 in over about 0 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 85°F
- Average low
- 65°F
- Precipitation
- 0.00 in
- Record high
- 105°FAug 30, 1967
- Record low
- 51°FAug 11, 1950
- Chance of a freeze
- 0%
- Days of 90°F or more
- 7.0
- Daylight
- 13 h 48 min to 12 h 54 min
- Cloud cover
- 16%
- Humidity
- 49%
- Dew point
- 52°F
- Wind
- 5.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 84°F | 65°F | 100°F 1959 | 57°F 1962 | 1% |
| Aug 2 | 84°F | 65°F | 99°F 1997 | 56°F 2012 | 1% |
| Aug 3 | 84°F | 65°F | 95°F 1998 | 56°F 1950 | 1% |
| Aug 4 | 84°F | 65°F | 100°F 1971 | 56°F 1953 | 1% |
| Aug 5 | 84°F | 65°F | 100°F 1997 | 55°F 1950 | 1% |
| Aug 6 | 84°F | 65°F | 103°F 1983 | 55°F 1950 | 1% |
| Aug 7 | 84°F | 65°F | 100°F 1983 | 54°F 1951 | 1% |
| Aug 8 | 84°F | 65°F | 97°F 1971 | 52°F 1950 | 1% |
| Aug 9 | 84°F | 65°F | 101°F 1998 | 58°F 1949 | 1% |
| Aug 10 | 84°F | 65°F | 97°F 1994 | 56°F 1962 | 1% |
| Aug 11 | 84°F | 65°F | 97°F 1994 | 51°F 1950 | 1% |
| Aug 12 | 84°F | 65°F | 102°F 1994 | 54°F 1949 | 1% |
| Aug 13 | 84°F | 65°F | 100°F 1994 | 54°F 1949 | 1% |
| Aug 14 | 85°F | 65°F | 96°F 2020 | 58°F 1949 | 1% |
| Aug 15 | 85°F | 65°F | 99°F 2015 | 57°F 1949 | 1% |
| Aug 16 | 85°F | 65°F | 96°F 2015 | 55°F 1949 | 1% |
| Aug 17 | 85°F | 65°F | 99°F 1967 | 55°F 1949 | 1% |
| Aug 18 | 85°F | 65°F | 100°F 2020 | 54°F 1949 | 1% |
| Aug 19 | 85°F | 65°F | 99°F 1986 | 56°F 1953 | 1% |
| Aug 20 | 85°F | 65°F | 97°F 1986 | 58°F 1951 | 1% |
| Aug 21 | 85°F | 65°F | 101°F 1982 | 57°F 1959 | 1% |
| Aug 22 | 85°F | 65°F | 98°F 1972 | 57°F 1968 | 1% |
| Aug 23 | 85°F | 65°F | 102°F 1968 | 57°F 1968 | 1% |
| Aug 24 | 85°F | 65°F | 97°F 2026 | 54°F 1949 | 1% |
| Aug 25 | 85°F | 65°F | 103°F 1981 | 56°F 1978 | 1% |
| Aug 26 | 85°F | 65°F | 100°F 1981 | 55°F 1955 | 1% |
| Aug 27 | 85°F | 65°F | 103°F 2009 | 53°F 1953 | 1% |
| Aug 28 | 85°F | 65°F | 97°F 2023 | 55°F 1955 | 1% |
| Aug 29 | 85°F | 65°F | 103°F 1998 | 54°F 1955 | 1% |
| Aug 30 | 85°F | 65°F | 105°F 1967 | 57°F 1949 | 1% |
| Aug 31 | 85°F | 65°F | 104°F 1967 | 57°F 1951 | 1% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- August 1
- sunrise 6:04 AM, sunset 7:52 PM
- August 31
- sunrise 6:25 AM, sunset 7:19 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047888 (Santa Ana Fire Stn), public domain. Records: NOAA GHCN-Daily, station USW00023129, 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.