Weather on August 30
Rancho Cucamonga, CA
55 Years of Data
Avg High
95°F
Avg Low
65°F
Warmest
2007
93°F avg
Coldest
1973
67°F avg
About This Date
August 30th in Rancho Cucamonga, CA typically brings hot summer weather, with average highs around 95°F and lows near 65°F — a 30°F daily swing. Over 42 years of records, the warmest August 30th was in 2007 (93°F average), while the coldest was 1973 (67°F) — a 26°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
Planning for August 30th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 98° | 70° | 84° | — | — |
| 2024 | 88° | 62° | 75° | — | — |
| 2023 | 101° | 75° | 88° | — | — |
| 2022 | 101° | 69° | 85° | — | — |
| 2021 | 93° | 68° | 81° | — | — |
| 2020 | 92° | 60° | 76° | — | — |
| 2019 | 97° | 70° | 83° | — | — |
| 2018 | 95° | 65° | 80° | — | — |
| 2017 | 108° | 75° | 91° | — | — |
| 2016 | 100° | 67° | 83° | — | — |
| 2015 | 95° | 70° | 82° | — | — |
| 2014 | 99° | 64° | 81° | — | — |
| 2013 | 97° | 82° | 89° | — | — |
| 2012 | 98° | 72° | 85° | — | — |
| 2011 | 93° | 63° | 78° | — | — |
| 2010 | 78° | 57° | 68° | — | — |
| 2009 | 104° | 70° | 87° | — | — |
| 2008 | 94° | 71° | 82° | — | — |
| 2007warmest | 107° | 78° | 93° | — | — |
| 2006 | 96° | 66° | 81° | — | — |
| 2005 | 95° | 67° | 81° | — | — |
| 2004 | 97° | 60° | 78° | — | — |
| 2003 | 91° | 62° | 77° | — | — |
| 2002 | 94° | 59° | 76° | — | — |
| 2001 | 87° | 62° | 75° | — | — |
| 2000 | 80° | 64° | 72° | — | — |
| 1999 | 91° | 59° | 75° | — | — |
| 1998 | 109° | 76° | 92° | — | — |
| 1984 | 106° | 66° | 86° | — | — |
| 1983 | 96° | 62° | 79° | — | — |
| 1982 | 93° | 60° | 77° | — | — |
| 1981 | 100° | 62° | 81° | — | — |
| 1980 | 89° | 54° | 71° | — | — |
| 1979 | 83° | 57° | 70° | — | — |
| 1978 | 89° | 57° | 73° | — | — |
| 1977 | 86° | 60° | 73° | — | — |
| 1976 | 105° | 70° | 87° | — | — |
| 1975 | 92° | 52° | 72° | — | — |
| 1974 | 92° | 53° | 72° | — | — |
| 1973coldest | 82° | 52° | 67° | — | — |
| 1972 | 91° | 71° | 81° | — | — |
| 1971 | 90° | 50° | 70° | — | — |
42 years of data from ONTARIO INTL AP