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Rancho Cucamonga, CA Weather on October 16
October 16th in Rancho Cucamonga, CA typically brings warm fall weather, with average highs around 81°F and lows near 55°F — a 26°F daily swing. Over 41 years of records, the warmest October 16th was in 2020 (84°F average), while the coldest was 1971 (49°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 7% of October 16th dates historically. The last decade has been 5.2°F warmer on this date compared to 20-30 years ago.
What to Expect on October 16
Planning for October 16th in Rancho Cucamonga, CA? Stay hydrated and seek shade during peak afternoon hours.
October 16 Weather Records for Rancho Cucamonga
- •The all-time record high for October 16th in Rancho Cucamonga, CA is 102°F, set in 2020.
- •The coldest October 16th on record dropped to 41°F in 1971.
- •Temperatures have reached 90°F or higher on October 16th in 12 of the last 41 years.
- •Last year (1971), October 16th was 24°F cooler than the long-term average.
Frequently Asked Questions
What was the warmest October 16 ever in Rancho Cucamonga?
The warmest October 16 in Rancho Cucamonga, CA reached 102°F in 2020. That is 21°F above the long-term average high of 81°F.
What was the coldest October 16 ever in Rancho Cucamonga?
The coldest October 16 in Rancho Cucamonga, CA dropped to 41°F in 1971. That is 14°F below the long-term average low of 55°F.
What is the average temperature on October 16 in Rancho Cucamonga?
On October 16, Rancho Cucamonga averages a high of 81°F and a low of 55°F based on 41 years of NOAA weather observations from ONTARIO INTL AP.
How many years of weather data are available for October 16 in Rancho Cucamonga?
We have 41 years of weather records for October 16 in Rancho Cucamonga, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
October 16 Weather History in Rancho Cucamonga
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 78°F | 52°F | 0" | -- |
| 2024 | 66°F | 60°F | 0" | -- |
| 2023 | 92°F | 60°F | 0" | -- |
| 2022 | 69°F | 59°F | 0" | -- |
| 2021 | 93°F | 53°F | 0" | -- |
| 2020 | 102°F | 66°F | 0" | -- |
| 2019 | 94°F | 59°F | 0" | -- |
| 2018 | 83°F | 53°F | 0" | -- |
| 2017 | 97°F | 61°F | 0" | -- |
| 2016 | 77°F | 62°F | 0" | -- |
| 2015 | 80°F | 67°F | 0.05" | -- |
| 2014 | 79°F | 57°F | 0" | -- |
| 2013 | 85°F | 59°F | 0" | -- |
| 2012 | 96°F | 62°F | 0" | -- |
| 2011 | 85°F | 56°F | 0" | -- |
| 2010 | 70°F | 60°F | 0" | -- |
| 2009 | 98°F | 62°F | 0" | -- |
| 2008 | 93°F | 59°F | 0" | -- |
| 2007 | 68°F | 56°F | 0" | -- |
| 2006 | 64°F | 58°F | 0" | -- |
| 2005 | 71°F | 55°F | 0" | -- |
| 2004 | 66°F | 58°F | 0.01" | -- |
| 2003 | 89°F | 55°F | 0" | -- |
| 2002 | 67°F | 57°F | 0" | -- |
| 2001 | 92°F | 58°F | 0" | -- |
| 2000 | 86°F | 52°F | 0" | -- |
| 1999 | 83°F | 52°F | 0" | -- |
| 1998 | 76°F | 51°F | 0" | -- |
| 1983 | 75°F | 54°F | 0" | -- |
| 1982 | 90°F | 50°F | 0" | -- |
| 1981 | 77°F | 43°F | 0" | -- |
| 1980 | 67°F | 46°F | 0" | -- |
| 1979 | 73°F | 51°F | 0" | -- |
| 1978 | 85°F | 53°F | 0" | -- |
| 1977 | 88°F | 58°F | 0" | -- |
| 1976 | 77°F | 49°F | 0" | -- |
| 1975 | 85°F | 51°F | 0" | -- |
| 1974 | 94°F | 58°F | 0" | -- |
| 1973 | 92°F | 58°F | 0" | -- |
| 1972 | 71°F | 44°F | 0" | -- |
| 1971 | 57°F | 41°F | 0.18" | -- |
Based on 41 years of data from NOAA station: ONTARIO INTL AP
Monthly Climate Averages
Historical temperature and precipitation averages for Rancho Cucamonga, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.