Weather on August 27
Rancho Cucamonga, CA
55 Years of Data
About This Date
August 27th in Rancho Cucamonga, CA typically brings hot summer weather, with average highs around 95°F and lows near 64°F — a 31°F daily swing. Over 42 years of records, the warmest August 27th was in 1981 (90°F average), while the coldest was 1972 (66°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 27th dates historically. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for August 27th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 98° | 69° | 84° | — | — |
| 2024 | 93° | 66° | 80° | — | — |
| 2023 | 102° | 66° | 84° | — | — |
| 2022 | 91° | 66° | 79° | — | — |
| 2021 | 104° | 69° | 87° | — | — |
| 2020 | 103° | 71° | 87° | — | — |
| 2019 | 96° | 69° | 83° | — | — |
| 2018 | 88° | 63° | 75° | — | — |
| 2017 | 99° | 66° | 82° | — | — |
| 2016 | 84° | 60° | 72° | — | — |
| 2015 | 103° | 73° | 88° | — | — |
| 2014 | 97° | 68° | 82° | — | — |
| 2013 | 97° | 75° | 86° | — | — |
| 2012 | 100° | 63° | 81° | — | — |
| 2011 | 107° | 74° | 90° | — | — |
| 2010 | 94° | 61° | 77° | — | — |
| 2009 | 108° | 66° | 87° | — | — |
| 2008 | 93° | 65° | 79° | — | — |
| 2007 | 95° | 67° | 81° | — | — |
| 2006 | 97° | 63° | 80° | — | — |
| 2005 | 101° | 71° | 86° | — | — |
| 2004 | 89° | 62° | 76° | — | — |
| 2003 | 95° | 69° | 82° | — | — |
| 2002 | 89° | 60° | 75° | — | — |
| 2001 | 97° | 64° | 80° | — | — |
| 2000 | 84° | 63° | 73° | — | — |
| 1999 | 99° | 67° | 83° | — | — |
| 1998 | 98° | 64° | 81° | — | — |
| 1984 | 105° | 62° | 84° | — | — |
| 1983 | 101° | 61° | 81° | — | — |
| 1982 | 94° | 67° | 80° | — | — |
| 1981warmest | 111° | 70° | 90° | — | — |
| 1980 | 93° | 55° | 74° | — | — |
| 1979 | 93° | 60° | 77° | — | — |
| 1978 | 88° | 55° | 71° | — | — |
| 1977 | 83° | 62° | 72° | — | — |
| 1976 | 94° | 59° | 76° | — | — |
| 1975 | 88° | 54° | 71° | — | — |
| 1974 | 91° | 55° | 73° | — | — |
| 1973 | 80° | 51° | 66° | — | — |
| 1972coldest | 76° | 57° | 66° | 0.1" | — |
| 1971 | 100° | 51° | 76° | — | — |
Rancho Cucamonga, CA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Rancho Cucamonga, CA Monthly Precipitation
Average rainfall per month, in inches.
Rancho Cucamonga, CA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Rancho Cucamonga, CA
Rancho Cucamonga, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.