Weather on August 14
Rancho Cucamonga, CA
55 Years of Data
Avg High
94°F
Avg Low
64°F
Warmest
2015
89°F avg
Coldest
1976
67°F avg
About This Date
August 14th in Rancho Cucamonga, CA typically brings hot summer weather, with average highs around 94°F and lows near 64°F — a 30°F daily swing. Over 41 years of records, the warmest August 14th was in 2015 (89°F average), while the coldest was 1976 (67°F) — a 22°F range across recorded history. This date has historically been dry, with little recorded precipitation. 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 August 14th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
2.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 89° | 65° | 77° | — | — |
| 2024 | 94° | 69° | 81° | — | — |
| 2023 | 97° | 65° | 81° | — | — |
| 2022 | 101° | 71° | 86° | — | — |
| 2021 | 96° | 70° | 83° | — | — |
| 2020 | 105° | 74° | 89° | — | — |
| 2019 | 101° | 66° | 83° | — | — |
| 2018 | 92° | 67° | 79° | — | — |
| 2017 | 89° | 64° | 77° | — | — |
| 2016 | 102° | 68° | 85° | — | — |
| 2015warmest | 105° | 73° | 89° | — | — |
| 2014 | 96° | 64° | 80° | — | — |
| 2013 | 100° | 61° | 80° | — | — |
| 2012 | 103° | 74° | 88° | — | — |
| 2011 | 92° | 60° | 76° | — | — |
| 2010 | 92° | 57° | 74° | — | — |
| 2009 | 89° | 62° | 76° | — | — |
| 2008 | 100° | 66° | 83° | — | — |
| 2007 | 104° | 69° | 87° | — | — |
| 2006 | 89° | 62° | 76° | — | — |
| 2005 | 79° | 63° | 71° | — | — |
| 2004 | 92° | 66° | 79° | — | — |
| 2003 | 105° | 69° | 87° | — | — |
| 2002 | 92° | 63° | 77° | — | — |
| 2001 | 102° | 68° | 85° | — | — |
| 2000 | 98° | 68° | 83° | — | — |
| 1999 | 88° | 60° | 74° | — | — |
| 1998 | 102° | 68° | 85° | — | — |
| 1983 | 99° | 71° | 85° | — | — |
| 1982 | 88° | 53° | 70° | — | — |
| 1981 | 96° | 63° | 79° | — | — |
| 1980 | 88° | 65° | 76° | — | — |
| 1979 | 83° | 55° | 69° | — | — |
| 1978 | 89° | 54° | 71° | — | — |
| 1977 | 96° | 60° | 78° | — | — |
| 1976coldest | 79° | 56° | 67° | — | — |
| 1975 | 87° | 50° | 69° | — | — |
| 1974 | 84° | 51° | 68° | — | — |
| 1973 | 91° | 63° | 77° | — | — |
| 1972 | 82° | 62° | 72° | — | — |
| 1971 | 89° | 59° | 74° | — | — |
41 years of data from ONTARIO INTL AP