Weather on April 17
Rancho Cucamonga, CA
55 Years of Data
Avg High
74°F
Avg Low
48°F
Warmest
1999
73°F avg
Coldest
1975
47°F avg
About This Date
April 17th in Rancho Cucamonga, CA typically brings pleasant spring weather, with average highs around 74°F and lows near 48°F — a 26°F daily swing. Over 41 years of records, the warmest April 17th was in 1999 (73°F average), while the coldest was 1975 (47°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 10% of April 17th dates historically, with the wettest April 17th recording 1.57" of rain. The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.7°F warmer on this date compared to 20-30 years ago.
Planning for April 17th in Rancho Cucamonga, CA? Great weather for outdoor activities.
Warming Trend
1.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 53° | 56° | — | — |
| 2024 | 83° | 55° | 69° | — | — |
| 2023 | 66° | 51° | 59° | — | — |
| 2022 | 80° | 54° | 67° | — | — |
| 2021 | 81° | 51° | 66° | — | — |
| 2020 | 68° | 51° | 60° | — | — |
| 2019 | 85° | 53° | 69° | — | — |
| 2018 | 75° | 44° | 60° | — | — |
| 2017 | 79° | 52° | 65° | — | — |
| 2016 | 91° | 54° | 72° | — | — |
| 2015 | 85° | 53° | 69° | — | — |
| 2014 | 77° | 54° | 65° | — | — |
| 2013 | 72° | 43° | 57° | — | — |
| 2012 | 84° | 53° | 69° | — | — |
| 2011 | 82° | 57° | 70° | — | — |
| 2010 | 79° | 49° | 64° | — | — |
| 2009 | 80° | 46° | 63° | — | — |
| 2008 | 85° | 47° | 66° | — | — |
| 2007 | 72° | 49° | 60° | — | — |
| 2006 | 66° | 50° | 58° | — | — |
| 2005 | 77° | 51° | 64° | — | — |
| 2004 | 56° | 49° | 52° | 0.41" | — |
| 2003 | 60° | 46° | 53° | — | — |
| 2002 | 65° | 48° | 56° | — | — |
| 2001 | 83° | 48° | 65° | — | — |
| 2000 | 60° | 49° | 54° | 1.57" | — |
| 1999warmest | 92° | 55° | 73° | — | — |
| 1984 | 79° | 46° | 62° | — | — |
| 1983 | 77° | 42° | 60° | — | — |
| 1982 | 70° | 41° | 55° | — | — |
| 1981 | 78° | 48° | 63° | — | — |
| 1980 | 91° | 54° | 72° | — | — |
| 1979 | 67° | 50° | 58° | — | — |
| 1978 | 69° | 38° | 53° | — | — |
| 1977 | 78° | 45° | 61° | — | — |
| 1976 | 65° | 35° | 50° | — | — |
| 1975coldest | 55° | 40° | 47° | 0.08" | — |
| 1974 | 75° | 43° | 59° | — | — |
| 1973 | 71° | 40° | 55° | — | — |
| 1972 | 69° | 39° | 54° | — | — |
| 1971 | 55° | 41° | 48° | 0.74" | — |
41 years of data from ONTARIO INTL AP