Weather on September 1
Pomona, CA
55 Years of Data
Avg High
91°F
Avg Low
61°F
Warmest
2017
92°F avg
Coldest
1992
64°F avg
About This Date
September 1st in Pomona, CA typically brings hot fall weather, with average highs around 91°F and lows near 61°F — a 30°F daily swing. Over 52 years of records, the warmest September 1st was in 2017 (92°F average), while the coldest was 1992 (64°F) — a 28°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for September 1st in Pomona, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 68° | 81° | — | — |
| 2024 | 93° | 65° | 79° | — | — |
| 2023 | 87° | 64° | 76° | — | — |
| 2022 | 103° | 77° | 90° | — | — |
| 2021 | 75° | 59° | 67° | — | — |
| 2020 | 84° | 56° | 70° | — | — |
| 2019 | 94° | 68° | 81° | — | — |
| 2018 | 83° | 58° | 70° | — | — |
| 2017warmest | 107° | 77° | 92° | — | — |
| 2016 | 89° | 59° | 74° | — | — |
| 2015 | 86° | 58° | 72° | — | — |
| 2014 | 93° | 62° | 78° | — | — |
| 2013 | 91° | 69° | 80° | — | — |
| 2012 | 94° | 61° | 77° | — | — |
| 2011 | 90° | 57° | 73° | — | — |
| 2010 | 94° | 58° | 76° | — | — |
| 2009 | 99° | 75° | 87° | — | — |
| 2008 | 88° | 64° | 76° | — | — |
| 2007 | 107° | 74° | 90° | — | — |
| 2006 | 99° | 63° | 81° | — | — |
| 2005 | — | 62° | — | — | — |
| 2004 | 104° | 62° | 83° | — | — |
| 2003 | 93° | 64° | 79° | — | — |
| 2002 | 95° | 64° | 80° | — | — |
| 2001 | 85° | 58° | 71° | — | — |
| 2000 | 74° | 57° | 65° | — | — |
| 1999 | 79° | 56° | 67° | — | — |
| 1998 | 103° | 69° | 86° | — | — |
| 1994 | 84° | 60° | 72° | — | — |
| 1993 | 84° | 50° | 67° | — | — |
| 1992coldest | 73° | 55° | 64° | — | — |
| 1991 | 93° | 63° | 78° | — | — |
| 1990 | 87° | 58° | 72° | — | — |
| 1989 | 90° | 51° | 70° | — | — |
| 1988 | 93° | 65° | 79° | — | — |
| 1987 | 109° | 61° | 85° | — | — |
| 1986 | 84° | 58° | 71° | — | — |
| 1985 | 91° | 62° | 77° | — | — |
| 1984 | 89° | 60° | 75° | — | — |
| 1983 | 95° | 63° | 79° | — | — |
| 1982 | 103° | 65° | 84° | — | — |
| 1981 | 88° | 57° | 72° | — | — |
| 1980 | 85° | 63° | 74° | — | — |
| 1979 | 85° | 60° | 72° | — | — |
| 1978 | 90° | 58° | 74° | — | — |
| 1977 | 83° | 56° | 69° | — | — |
| 1976 | 96° | 63° | 79° | — | — |
| 1975 | 89° | 52° | 70° | — | — |
| 1974 | 92° | 57° | 74° | — | — |
| 1973 | 79° | 52° | 65° | — | — |
| 1972 | 90° | 63° | 76° | — | — |
| 1971 | 84° | 57° | 71° | — | — |
52 years of data from POMONA/FAIRPLEX