Weather on August 30
Rancho Cucamonga, CA
55 Years of Data
About This Date
August 30th in Rancho Cucamonga, CA typically brings hot summer weather, with average highs around 95°F and lows near 65°F — a 30°F daily swing. Over 43 years of records, the warmest August 30th was in 2007 (93°F average), while the coldest was 1973 (67°F) — a 26°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for August 30th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 96° | 72° | 84° | — | — |
| 2025 | 98° | 70° | 84° | — | — |
| 2024 | 88° | 62° | 75° | — | — |
| 2023 | 101° | 75° | 88° | — | — |
| 2022 | 101° | 69° | 85° | — | — |
| 2021 | 93° | 68° | 81° | — | — |
| 2020 | 92° | 60° | 76° | — | — |
| 2019 | 97° | 70° | 83° | — | — |
| 2018 | 95° | 65° | 80° | — | — |
| 2017 | 108° | 75° | 91° | — | — |
| 2016 | 100° | 67° | 83° | — | — |
| 2015 | 95° | 70° | 82° | — | — |
| 2014 | 99° | 64° | 81° | — | — |
| 2013 | 97° | 82° | 89° | — | — |
| 2012 | 98° | 72° | 85° | — | — |
| 2011 | 93° | 63° | 78° | — | — |
| 2010 | 78° | 57° | 68° | — | — |
| 2009 | 104° | 70° | 87° | — | — |
| 2008 | 94° | 71° | 82° | — | — |
| 2007warmest | 107° | 78° | 93° | — | — |
| 2006 | 96° | 66° | 81° | — | — |
| 2005 | 95° | 67° | 81° | — | — |
| 2004 | 97° | 60° | 78° | — | — |
| 2003 | 91° | 62° | 77° | — | — |
| 2002 | 94° | 59° | 76° | — | — |
| 2001 | 87° | 62° | 75° | — | — |
| 2000 | 80° | 64° | 72° | — | — |
| 1999 | 91° | 59° | 75° | — | — |
| 1998 | 109° | 76° | 92° | — | — |
| 1984 | 106° | 66° | 86° | — | — |
| 1983 | 96° | 62° | 79° | — | — |
| 1982 | 93° | 60° | 77° | — | — |
| 1981 | 100° | 62° | 81° | — | — |
| 1980 | 89° | 54° | 71° | — | — |
| 1979 | 83° | 57° | 70° | — | — |
| 1978 | 89° | 57° | 73° | — | — |
| 1977 | 86° | 60° | 73° | — | — |
| 1976 | 105° | 70° | 87° | — | — |
| 1975 | 92° | 52° | 72° | — | — |
| 1974 | 92° | 53° | 72° | — | — |
| 1973coldest | 82° | 52° | 67° | — | — |
| 1972 | 91° | 71° | 81° | — | — |
| 1971 | 90° | 50° | 70° | — | — |
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
Most pleasant months in Rancho Cucamonga, CA: January, February, March, April, May, October, November, December.
What to expect on August 30th
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
August 30th outlook →