Weather on June 30
Rancho Cucamonga, CA
55 Years of Data
Avg High
91°F
Avg Low
61°F
Warmest
2013
90°F avg
Coldest
1982
64°F avg
About This Date
June 30th in Rancho Cucamonga, CA typically brings hot summer weather, with average highs around 91°F and lows near 61°F — a 30°F daily swing. Over 42 years of records, the warmest June 30th was in 2013 (90°F average), while the coldest was 1982 (64°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 2% of June 30th dates historically. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for June 30th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 95° | 64° | 80° | — | — |
| 2024 | 98° | 65° | 81° | — | — |
| 2023 | 94° | 61° | 77° | — | — |
| 2022 | 94° | 67° | 80° | — | — |
| 2021 | 95° | 66° | 81° | — | — |
| 2020 | 86° | 60° | 73° | — | — |
| 2019 | 98° | 66° | 82° | — | — |
| 2018 | 85° | 61° | 73° | — | — |
| 2017 | 88° | 61° | 74° | — | — |
| 2016 | 96° | 65° | 80° | — | — |
| 2015 | 100° | 69° | 85° | 0.03" | — |
| 2014 | 90° | 66° | 78° | — | — |
| 2013warmest | 104° | 75° | 90° | — | — |
| 2012 | 91° | 60° | 76° | — | — |
| 2011 | 91° | 58° | 74° | — | — |
| 2010 | 91° | 61° | 76° | — | — |
| 2009 | 90° | 64° | 77° | — | — |
| 2008 | 97° | 65° | 81° | — | — |
| 2007 | 95° | 64° | 80° | — | — |
| 2006 | 101° | 70° | 85° | — | — |
| 2005 | 90° | 59° | 74° | — | — |
| 2004 | 79° | 59° | 69° | — | — |
| 2003 | 94° | 60° | 77° | — | — |
| 2002 | 87° | 56° | 71° | — | — |
| 2001 | 96° | 58° | 77° | — | — |
| 2000 | 88° | 62° | 75° | — | — |
| 1999 | 91° | 58° | 74° | — | — |
| 1998 | 88° | 61° | 74° | — | — |
| 1984 | 98° | 60° | 79° | — | — |
| 1983 | 75° | 60° | 68° | — | — |
| 1982coldest | 74° | 55° | 64° | — | — |
| 1981 | 93° | 59° | 76° | — | — |
| 1980 | 93° | 67° | 80° | — | — |
| 1979 | 94° | 59° | 76° | — | — |
| 1978 | 85° | 53° | 69° | — | — |
| 1977 | 91° | 60° | 76° | — | — |
| 1976 | 91° | 59° | 75° | — | — |
| 1975 | 85° | 53° | 69° | — | — |
| 1974 | 86° | 52° | 69° | — | — |
| 1973 | 89° | 52° | 70° | — | — |
| 1972 | 93° | 61° | 77° | — | — |
| 1971 | 84° | 50° | 67° | — | — |
42 years of data from ONTARIO INTL AP