Weather on May 18
Pomona, CA
55 Years of Data
Avg High
77°F
Avg Low
51°F
Warmest
2008
84°F avg
Coldest
1974
54°F avg
About This Date
May 18th in Pomona, CA typically brings pleasant spring weather, with average highs around 77°F and lows near 51°F — a 26°F daily swing. Over 52 years of records, the warmest May 18th was in 2008 (84°F average), while the coldest was 1974 (54°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 2% of May 18th dates historically. The last decade has been 4.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.7°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Pomona, CA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 52° | 61° | — | — |
| 2024 | 72° | 48° | 60° | — | — |
| 2023 | 76° | 55° | 65° | — | — |
| 2022 | 80° | 50° | 65° | — | — |
| 2021 | 76° | 53° | 64° | — | — |
| 2020 | 65° | 51° | 58° | — | — |
| 2019 | 70° | 46° | 58° | — | — |
| 2018 | 68° | 51° | 60° | — | — |
| 2017 | 77° | 45° | 61° | — | — |
| 2016 | 78° | 52° | 65° | — | — |
| 2015 | 68° | 51° | 60° | — | — |
| 2014 | 78° | 52° | 65° | — | — |
| 2013 | 76° | 52° | 64° | — | — |
| 2012 | 76° | 57° | 66° | — | — |
| 2011 | 64° | 50° | 57° | 0.48" | — |
| 2010 | 65° | 49° | 57° | — | — |
| 2009 | 90° | 60° | 75° | — | — |
| 2008warmest | 102° | 67° | 84° | — | — |
| 2007 | 79° | 51° | 65° | — | — |
| 2006 | 81° | 60° | 70° | — | — |
| 2005 | 82° | 54° | 68° | — | — |
| 2004 | 78° | 59° | 69° | — | — |
| 2003 | 76° | 50° | 63° | — | — |
| 2002 | 78° | 52° | 65° | — | — |
| 2001 | 75° | 58° | 66° | — | — |
| 2000 | 84° | 50° | 67° | — | — |
| 1999 | 80° | 53° | 67° | — | — |
| 1995 | 76° | 45° | 60° | — | — |
| 1994 | 65° | 44° | 54° | — | — |
| 1993 | 83° | 49° | 66° | — | — |
| 1992 | 78° | 47° | 62° | — | — |
| 1991 | 70° | 46° | 58° | — | — |
| 1990 | 72° | 50° | 61° | — | — |
| 1989 | 75° | 59° | 67° | — | — |
| 1988 | 77° | 45° | 61° | — | — |
| 1987 | 75° | 59° | 67° | — | — |
| 1986 | 93° | 53° | 73° | — | — |
| 1985 | 75° | 44° | 60° | — | — |
| 1984 | 81° | 52° | 66° | — | — |
| 1983 | 89° | 52° | 70° | — | — |
| 1982 | 74° | 54° | 64° | — | — |
| 1981 | 81° | 47° | 64° | — | — |
| 1980 | 82° | 51° | 67° | — | — |
| 1979 | 78° | 50° | 64° | — | — |
| 1978 | 89° | 53° | 71° | — | — |
| 1977 | 70° | 45° | 57° | — | — |
| 1976 | 84° | 49° | 66° | — | — |
| 1975 | 78° | 50° | 64° | — | — |
| 1974coldest | 68° | 40° | 54° | — | — |
| 1973 | 79° | 52° | 65° | — | — |
| 1972 | 72° | 55° | 63° | — | — |
| 1971 | 86° | 53° | 70° | — | — |
52 years of data from POMONA/FAIRPLEX