Weather on August 29
Rancho Cucamonga, CA
55 Years of Data
Avg High
96°F
Avg Low
65°F
Warmest
2017
92°F avg
Coldest
2000
67°F avg
About This Date
August 29th in Rancho Cucamonga, CA typically brings hot summer weather, with average highs around 96°F and lows near 65°F — a 31°F daily swing. Over 42 years of records, the warmest August 29th was in 2017 (92°F average), while the coldest was 2000 (67°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 29th dates historically. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for August 29th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 96° | 70° | 83° | — | — |
| 2024 | 89° | 60° | 75° | — | — |
| 2023 | 105° | 73° | 89° | — | — |
| 2022 | 92° | 65° | 78° | — | — |
| 2021 | 102° | 69° | 86° | — | — |
| 2020 | 95° | 63° | 79° | — | — |
| 2019 | 96° | 68° | 82° | — | — |
| 2018 | 92° | 65° | 78° | — | — |
| 2017warmest | 108° | 77° | 92° | — | — |
| 2016 | 100° | 65° | 82° | — | — |
| 2015 | 102° | 73° | 88° | — | — |
| 2014 | 100° | 69° | 85° | — | — |
| 2013 | 104° | 75° | 90° | — | — |
| 2012 | 101° | 75° | 88° | — | — |
| 2011 | 99° | 69° | 84° | — | — |
| 2010 | 77° | 59° | 68° | — | — |
| 2009 | 108° | 74° | 91° | — | — |
| 2008 | 100° | 66° | 83° | — | — |
| 2007 | 107° | 73° | 90° | — | — |
| 2006 | 102° | 67° | 84° | — | — |
| 2005 | 98° | 69° | 84° | — | — |
| 2004 | 93° | 60° | 77° | — | — |
| 2003 | 95° | 66° | 81° | — | — |
| 2002 | 89° | 58° | 73° | — | — |
| 2001 | 83° | 60° | 71° | — | — |
| 2000coldest | 69° | 64° | 67° | 0.03" | — |
| 1999 | 96° | 60° | 78° | — | — |
| 1998 | 108° | 72° | 90° | — | — |
| 1984 | 102° | 67° | 84° | — | — |
| 1983 | 100° | 61° | 80° | — | — |
| 1982 | 91° | 59° | 75° | — | — |
| 1981 | 106° | 68° | 87° | — | — |
| 1980 | 91° | 57° | 74° | — | — |
| 1979 | 78° | 61° | 69° | — | — |
| 1978 | 91° | 59° | 75° | — | — |
| 1977 | 92° | 62° | 77° | — | — |
| 1976 | 106° | 66° | 86° | — | — |
| 1975 | 88° | 52° | 70° | — | — |
| 1974 | 92° | 51° | 71° | — | — |
| 1973 | 90° | 53° | 71° | — | — |
| 1972 | 91° | 61° | 76° | — | — |
| 1971 | 97° | 57° | 77° | — | — |
42 years of data from ONTARIO INTL AP