Weather on August 16
Rancho Cucamonga, CA
55 Years of Data
Avg High
94°F
Avg Low
64°F
Warmest
2015
90°F avg
Coldest
1976
66°F avg
About This Date
August 16th 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 42 years of records, the warmest August 16th was in 2015 (90°F average), while the coldest was 1976 (66°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 5% of August 16th dates historically, with the wettest August 16th recording 0.51" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for August 16th 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 | 85° | 62° | 73° | — | — |
| 2024 | 97° | 68° | 82° | — | — |
| 2023 | 102° | 73° | 88° | — | — |
| 2022 | 101° | 69° | 85° | — | — |
| 2021 | 98° | 70° | 84° | — | — |
| 2020 | 103° | 77° | 90° | — | — |
| 2019 | 95° | 62° | 79° | — | — |
| 2018 | 93° | 69° | 81° | — | — |
| 2017 | 85° | 63° | 74° | — | — |
| 2016 | 104° | 66° | 85° | — | — |
| 2015warmest | 107° | 73° | 90° | — | — |
| 2014 | 99° | 69° | 84° | — | — |
| 2013 | 97° | 67° | 82° | — | — |
| 2012 | 103° | 73° | 88° | — | — |
| 2011 | 95° | 62° | 79° | — | — |
| 2010 | 99° | 64° | 81° | — | — |
| 2009 | 87° | 60° | 74° | — | — |
| 2008 | 94° | 65° | 79° | — | — |
| 2007 | 101° | 72° | 86° | — | — |
| 2006 | 86° | 59° | 73° | — | — |
| 2005 | 85° | 60° | 72° | — | — |
| 2004 | 92° | 62° | 77° | — | — |
| 2003 | 98° | 69° | 84° | — | — |
| 2002 | 85° | 61° | 73° | — | — |
| 2001 | 100° | 66° | 83° | — | — |
| 2000 | 100° | 70° | 85° | — | — |
| 1999 | 96° | 58° | 77° | — | — |
| 1998 | 91° | 64° | 78° | — | — |
| 1984 | 104° | 64° | 84° | — | — |
| 1983 | 93° | 74° | 83° | 0.51" | — |
| 1982 | 93° | 56° | 74° | — | — |
| 1981 | 93° | 63° | 78° | — | — |
| 1980 | 83° | 63° | 73° | — | — |
| 1979 | 89° | 55° | 72° | — | — |
| 1978 | 88° | 51° | 69° | — | — |
| 1977 | 90° | 72° | 81° | 0.3" | — |
| 1976coldest | 77° | 55° | 66° | — | — |
| 1975 | 85° | 50° | 67° | — | — |
| 1974 | 88° | 48° | 68° | — | — |
| 1973 | 91° | 63° | 77° | — | — |
| 1972 | 84° | 53° | 69° | — | — |
| 1971 | 92° | 61° | 76° | — | — |
42 years of data from ONTARIO INTL AP