Weather on May 30
Rancho Cucamonga, CA
55 Years of Data
Avg High
83°F
Avg Low
56°F
Warmest
2025
80°F avg
Coldest
1971
55°F avg
About This Date
May 30th in Rancho Cucamonga, CA typically brings warm spring weather, with average highs around 83°F and lows near 56°F — a 27°F daily swing. Over 42 years of records, the warmest May 30th was in 2025 (80°F average), while the coldest was 1971 (55°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 2% of May 30th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 30th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 100° | 61° | 80° | — | — |
| 2024 | 83° | 55° | 69° | — | — |
| 2023 | 69° | 57° | 63° | — | — |
| 2022 | 79° | 54° | 66° | — | — |
| 2021 | 81° | 58° | 69° | — | — |
| 2020 | 82° | 62° | 72° | — | — |
| 2019 | 89° | 57° | 73° | — | — |
| 2018 | 76° | 59° | 67° | — | — |
| 2017 | 81° | 58° | 69° | — | — |
| 2016 | 79° | 56° | 67° | — | — |
| 2015 | 90° | 58° | 74° | — | — |
| 2014 | 92° | 61° | 76° | — | — |
| 2013 | 88° | 59° | 73° | — | — |
| 2012 | 84° | 58° | 71° | — | — |
| 2011 | 81° | 50° | 65° | — | — |
| 2010 | 91° | 54° | 72° | — | — |
| 2009 | 74° | 59° | 66° | — | — |
| 2008 | 80° | 55° | 68° | — | — |
| 2007 | 82° | 54° | 68° | — | — |
| 2006 | 91° | 57° | 74° | — | — |
| 2005 | 80° | 57° | 69° | — | — |
| 2004 | 94° | 56° | 75° | — | — |
| 2003 | 85° | 60° | 72° | — | — |
| 2002 | 90° | 59° | 74° | — | — |
| 2001 | 90° | 58° | 74° | — | — |
| 2000 | 84° | 60° | 72° | — | — |
| 1999 | 74° | 53° | 63° | — | — |
| 1998 | 78° | 49° | 63° | — | — |
| 1984 | 95° | 61° | 78° | — | — |
| 1983 | 81° | 53° | 67° | — | — |
| 1982 | 76° | 54° | 65° | — | — |
| 1981 | 80° | 61° | 70° | — | — |
| 1980 | 69° | 45° | 57° | — | — |
| 1979 | 75° | 52° | 63° | — | — |
| 1978 | 93° | 60° | 77° | — | — |
| 1977 | 88° | 52° | 70° | — | — |
| 1976 | 71° | 49° | 60° | — | — |
| 1975 | 87° | 48° | 68° | — | — |
| 1974 | 70° | 51° | 60° | — | — |
| 1973 | 83° | 51° | 67° | — | — |
| 1972 | 93° | 62° | 78° | — | — |
| 1971coldest | 60° | 50° | 55° | 0.1" | — |
42 years of data from ONTARIO INTL AP