Montclair Weather in August
Average highs run from 92°F on August 1 to 92°F on August 31, and lows from 63°F to 62°F. Normal precipitation for the month is 0.03 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
- 92°F
- Average low
- 63°F
- Precipitation
- 0.03 in
- Record high
- 110°FAug 3, 1918
- Record low
- 42°FAug 27, 1920
- Chance of a freeze
- 0%
- Days of 90°F or more
- 19.0
- Daylight
- 13 h 50 min to 12 h 54 min
- Cloud cover
- 16%
- Humidity
- 39%
- Dew point
- 47°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 | 92°F | 63°F | 107°F 1900 | 49°F 1942 | 1% |
| Aug 2 | 92°F | 63°F | 104°F 1938 | 47°F 1942 | 1% |
| Aug 3 | 92°F | 63°F | 110°F 1918 | 45°F 1944 | 1% |
| Aug 4 | 92°F | 63°F | 104°F 1913 | 47°F 1944 | 1% |
| Aug 5 | 92°F | 63°F | 102°F 1947 | 45°F 1950 | 1% |
| Aug 6 | 92°F | 63°F | 106°F 1983 | 43°F 1950 | 1% |
| Aug 7 | 92°F | 63°F | 101°F 2012 | 45°F 1950 | 1% |
| Aug 8 | 92°F | 63°F | 103°F 1965 | 45°F 2006 | 1% |
| Aug 9 | 92°F | 63°F | 108°F 1898 | 44°F 1916 | 1% |
| Aug 10 | 92°F | 63°F | 104°F 1898 | 47°F 1948 | 1% |
| Aug 11 | 92°F | 63°F | 106°F 1933 | 44°F 1950 | 1% |
| Aug 12 | 93°F | 63°F | 107°F 1898 | 43°F 1950 | 1% |
| Aug 13 | 93°F | 63°F | 105°F 1967 | 45°F 1916 | 1% |
| Aug 14 | 93°F | 63°F | 105°F 2003 | 46°F 1919 | 1% |
| Aug 15 | 93°F | 63°F | 104°F 1898 | 47°F 1913 | 1% |
| Aug 16 | 93°F | 63°F | 102°F 1901 | 46°F 1918 | 1% |
| Aug 17 | 93°F | 63°F | 102°F 1946 | 45°F 1913 | 1% |
| Aug 18 | 93°F | 63°F | 106°F 1932 | 44°F 1918 | 1% |
| Aug 19 | 93°F | 63°F | 103°F 1898 | 43°F 1916 | 1% |
| Aug 20 | 93°F | 63°F | 104°F 1898 | 43°F 1925 | 1% |
| Aug 21 | 93°F | 63°F | 107°F 1969 | 47°F 1900 | 1% |
| Aug 22 | 93°F | 63°F | 106°F 1969 | 45°F 1918 | 1% |
| Aug 23 | 93°F | 63°F | 107°F 1956 | 45°F 1925 | 1% |
| Aug 24 | 93°F | 63°F | 109°F 1926 | 46°F 1948 | 1% |
| Aug 25 | 93°F | 63°F | 110°F 1894 | 48°F 1943 | 1% |
| Aug 26 | 93°F | 63°F | 109°F 1901 | 46°F 1920 | 1% |
| Aug 27 | 92°F | 63°F | 106°F 1937 | 42°F 1920 | 1% |
| Aug 28 | 92°F | 63°F | 107°F 2009 | 44°F 1914 | 1% |
| Aug 29 | 92°F | 62°F | 109°F 1967 | 45°F 1917 | 1% |
| Aug 30 | 92°F | 62°F | 108°F 1967 | 45°F 1947 | 1% |
| Aug 31 | 92°F | 62°F | 107°F 1929 | 43°F 1928 | 1% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- August 1
- sunrise 6:02 AM, sunset 7:52 PM
- August 31
- sunrise 6:24 AM, sunset 7:18 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047050 (Pomona/fairplex), public domain. Records: NOAA GHCN-Daily, station USC00047050, 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.