National City Weather in August
Average highs run from 76°F on August 1 to 78°F on August 31, and lows from 66°F to 65°F. Normal precipitation for the month is 0.01 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
- 77°F
- Average low
- 66°F
- Precipitation
- 0.01 in
- Record high
- 98°FAug 31, 1955
- Record low
- 57°FAug 7, 1944
- Chance of a freeze
- 0%
- Days of 90°F or more
- 0.5
- Daylight
- 13 h 43 min to 12 h 51 min
- Cloud cover
- 24%
- Humidity
- 56%
- Dew point
- 55°F
- Wind
- 5.8 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 | 76°F | 66°F | 90°F 1972 | 60°F 1944 | 1% |
| Aug 2 | 76°F | 66°F | 85°F 1971 | 59°F 1944 | 1% |
| Aug 3 | 76°F | 66°F | 85°F 1971 | 58°F 1944 | 1% |
| Aug 4 | 76°F | 66°F | 86°F 1971 | 60°F 1944 | 1% |
| Aug 5 | 76°F | 66°F | 88°F 1961 | 60°F 1944 | 1% |
| Aug 6 | 76°F | 66°F | 88°F 1979 | 58°F 1944 | 1% |
| Aug 7 | 76°F | 66°F | 91°F 2018 | 57°F 1944 | 1% |
| Aug 8 | 76°F | 66°F | 89°F 2018 | 58°F 1944 | 1% |
| Aug 9 | 76°F | 66°F | 90°F 2018 | 60°F 1948 | 1% |
| Aug 10 | 77°F | 66°F | 88°F 2018 | 60°F 1948 | 1% |
| Aug 11 | 77°F | 66°F | 88°F 2018 | 61°F 1950 | 1% |
| Aug 12 | 77°F | 66°F | 94°F 1991 | 60°F 1949 | 1% |
| Aug 13 | 77°F | 66°F | 93°F 1994 | 60°F 1949 | 1% |
| Aug 14 | 77°F | 66°F | 90°F 1994 | 60°F 1950 | 1% |
| Aug 15 | 77°F | 66°F | 87°F 1992 | 60°F 1950 | 1% |
| Aug 16 | 77°F | 66°F | 88°F 1983 | 60°F 1949 | 1% |
| Aug 17 | 77°F | 66°F | 88°F 1992 | 59°F 1949 | 1% |
| Aug 18 | 77°F | 66°F | 90°F 1986 | 61°F 1950 | 1% |
| Aug 19 | 77°F | 66°F | 88°F 1986 | 61°F 1948 | 1% |
| Aug 20 | 77°F | 66°F | 85°F 2020 | 61°F 1949 | 1% |
| Aug 21 | 77°F | 66°F | 89°F 1982 | 61°F 1959 | 1% |
| Aug 22 | 77°F | 66°F | 90°F 1972 | 60°F 1947 | 1% |
| Aug 23 | 77°F | 66°F | 89°F 1968 | 59°F 1947 | 1% |
| Aug 24 | 78°F | 66°F | 85°F 1985 | 61°F 1943 | 1% |
| Aug 25 | 78°F | 66°F | 89°F 1981 | 58°F 1975 | 1% |
| Aug 26 | 78°F | 66°F | 92°F 1981 | 59°F 1940 | 1% |
| Aug 27 | 78°F | 66°F | 89°F 1949 | 59°F 1975 | 1% |
| Aug 28 | 78°F | 66°F | 91°F 2009 | 59°F 1947 | 1% |
| Aug 29 | 78°F | 66°F | 88°F 2009 | 59°F 1947 | 1% |
| Aug 30 | 78°F | 65°F | 90°F 1985 | 58°F 1941 | 1% |
| Aug 31 | 78°F | 65°F | 98°F 1955 | 58°F 1942 | 1% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- August 1
- sunrise 6:03 AM, sunset 7:46 PM
- August 31
- sunrise 6:23 AM, sunset 7:14 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00041758 (Chula Vista), public domain. Records: NOAA GHCN-Daily, station USW00023188, 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.