Weather on June 17
Rancho Cucamonga, CA
55 Years of Data
Avg High
86°F
Avg Low
58°F
Warmest
1981
85°F avg
Coldest
1975
57°F avg
About This Date
June 17th in Rancho Cucamonga, CA typically brings warm summer weather, with average highs around 86°F and lows near 58°F — a 28°F daily swing. Over 42 years of records, the warmest June 17th was in 1981 (85°F average), while the coldest was 1975 (57°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 2% of June 17th dates historically. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for June 17th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 97° | 65° | 81° | — | — |
| 2024 | 77° | 60° | 69° | — | — |
| 2023 | 89° | 59° | 74° | — | — |
| 2022 | 83° | 60° | 71° | — | — |
| 2021 | 101° | 70° | 85° | — | — |
| 2020 | 80° | 62° | 71° | — | — |
| 2019 | 81° | 64° | 72° | — | — |
| 2018 | 73° | 59° | 66° | — | — |
| 2017 | 97° | 64° | 80° | — | — |
| 2016 | 93° | 61° | 77° | — | — |
| 2015 | 94° | 59° | 76° | — | — |
| 2014 | 82° | 58° | 70° | — | — |
| 2013 | 89° | 60° | 75° | — | — |
| 2012 | 95° | 60° | 78° | — | — |
| 2011 | 78° | 58° | 68° | — | — |
| 2010 | 84° | 55° | 70° | — | — |
| 2009 | 80° | 58° | 69° | — | — |
| 2008 | 99° | 65° | 82° | — | — |
| 2007 | 87° | 57° | 72° | — | — |
| 2006 | 93° | 65° | 79° | — | — |
| 2005 | 76° | 59° | 67° | — | — |
| 2004 | 81° | 59° | 70° | — | — |
| 2003 | 87° | 60° | 74° | — | — |
| 2002 | 92° | 60° | 76° | — | — |
| 2001 | 95° | 58° | 76° | — | — |
| 2000 | 86° | 62° | 74° | — | — |
| 1999 | 88° | 56° | 72° | — | — |
| 1998 | 84° | 59° | 72° | — | — |
| 1984 | 95° | 52° | 73° | — | — |
| 1983 | 88° | 54° | 71° | — | — |
| 1982 | 73° | 58° | 65° | — | — |
| 1981warmest | 106° | 65° | 85° | — | — |
| 1980 | 90° | 52° | 71° | — | — |
| 1979 | 75° | 55° | 65° | — | — |
| 1978 | 96° | 56° | 76° | — | — |
| 1977 | 84° | 49° | 66° | — | — |
| 1976 | 85° | 50° | 67° | — | — |
| 1975coldest | 63° | 52° | 57° | 0.05" | — |
| 1974 | 83° | 46° | 64° | — | — |
| 1973 | 79° | 49° | 64° | — | — |
| 1972 | 84° | 54° | 69° | — | — |
| 1971 | 87° | 55° | 71° | — | — |
42 years of data from ONTARIO INTL AP