Weather on September 4
Pomona, CA
55 Years of Data
Avg High
92°F
Avg Low
62°F
Warmest
2022
92°F avg
Coldest
1985
63°F avg
About This Date
September 4th in Pomona, CA typically brings hot fall weather, with average highs around 92°F and lows near 62°F — a 30°F daily swing. Over 52 years of records, the warmest September 4th was in 2022 (92°F average), while the coldest was 1985 (63°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 4% of September 4th dates historically. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for September 4th in Pomona, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 93° | 67° | 80° | — | — |
| 2024 | 103° | 70° | 86° | — | — |
| 2023 | 77° | 58° | 67° | — | — |
| 2022warmest | 106° | 79° | 92° | — | — |
| 2021 | 97° | 63° | 80° | — | — |
| 2020 | 99° | 67° | 83° | — | — |
| 2019 | 98° | 72° | 85° | — | — |
| 2018 | 83° | 60° | 71° | — | — |
| 2017 | 85° | 67° | 76° | — | — |
| 2016 | 77° | 57° | 67° | — | — |
| 2015 | 82° | 57° | 70° | — | — |
| 2014 | 86° | 57° | 72° | — | — |
| 2013 | 101° | 70° | 85° | — | — |
| 2012 | 96° | 64° | 80° | — | — |
| 2011 | 90° | 60° | 75° | — | — |
| 2010 | 103° | 64° | 83° | — | — |
| 2009 | 98° | 69° | 84° | — | — |
| 2008 | 95° | 64° | 80° | — | — |
| 2007 | 91° | 63° | 77° | — | — |
| 2006 | 101° | 73° | 87° | — | — |
| 2005 | — | 57° | — | — | — |
| 2004 | 100° | 60° | 80° | — | — |
| 2003 | 101° | 65° | 83° | — | — |
| 2002 | 107° | 66° | 87° | — | — |
| 2001 | 86° | 64° | 75° | — | — |
| 2000 | 83° | 55° | 69° | — | — |
| 1999 | 84° | 53° | 69° | — | — |
| 1998 | 78° | 64° | 71° | — | — |
| 1994 | 90° | 59° | 74° | — | — |
| 1993 | 103° | 53° | 78° | — | — |
| 1992 | 75° | 50° | 63° | — | — |
| 1991 | 87° | 61° | 74° | — | — |
| 1990 | 95° | 60° | 78° | — | — |
| 1989 | 95° | 56° | 75° | — | — |
| 1988 | 106° | 72° | 89° | — | — |
| 1987 | 87° | 57° | 72° | — | — |
| 1986 | 93° | 54° | 73° | — | — |
| 1985coldest | 69° | 58° | 63° | 0.25" | — |
| 1984 | 106° | 60° | 83° | — | — |
| 1983 | 91° | 56° | 73° | — | — |
| 1982 | 103° | 65° | 84° | — | — |
| 1981 | 85° | 58° | 71° | — | — |
| 1980 | 88° | 56° | 72° | — | — |
| 1979 | 93° | 53° | 73° | — | — |
| 1978 | 94° | 68° | 81° | — | — |
| 1977 | 90° | 55° | 72° | — | — |
| 1976 | 94° | 62° | 78° | — | — |
| 1975 | 95° | 59° | 77° | — | — |
| 1974 | 94° | 62° | 78° | — | — |
| 1973 | 79° | 58° | 68° | — | — |
| 1972 | 85° | 68° | 76° | 0.25" | — |
| 1971 | 85° | 56° | 70° | — | — |
52 years of data from POMONA/FAIRPLEX