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Rancho Cucamonga, CA Weather on April 12
April 12th in Rancho Cucamonga, CA typically brings pleasant spring weather, with average highs around 73°F and lows near 49°F. Over 41 years of records, the warmest April 12th was in 2000 (72°F average), while the coldest was 1983 (49°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 12% of April 12th dates historically, with the wettest April 12th recording 1.78" of rain. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on April 12
Planning for April 12th in Rancho Cucamonga, CA? Great weather for outdoor activities.
April 12 Weather Records for Rancho Cucamonga
- •The all-time record high for April 12th in Rancho Cucamonga, CA is 93°F, set in 2008.
- •The coldest April 12th on record dropped to 39°F in 1975.
- •Temperatures have reached 90°F or higher on April 12th in 2 of the last 41 years.
- •Last year (1971), April 12th was 6°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest April 12 ever in Rancho Cucamonga?
The warmest April 12 in Rancho Cucamonga, CA reached 93°F in 2008. That is 20°F above the long-term average high of 73°F.
What was the coldest April 12 ever in Rancho Cucamonga?
The coldest April 12 in Rancho Cucamonga, CA dropped to 39°F in 1975. That is 10°F below the long-term average low of 49°F.
What is the average temperature on April 12 in Rancho Cucamonga?
On April 12, Rancho Cucamonga averages a high of 73°F and a low of 49°F based on 41 years of NOAA weather observations from ONTARIO INTL AP.
How many years of weather data are available for April 12 in Rancho Cucamonga?
We have 41 years of weather records for April 12 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.
April 12 Weather History in Rancho Cucamonga
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 82°F | 56°F | 0" | -- |
| 2024 | 64°F | 51°F | 0" | -- |
| 2023 | 67°F | 53°F | 0" | -- |
| 2022 | 70°F | 47°F | 0" | -- |
| 2021 | 72°F | 55°F | 0" | -- |
| 2020 | 60°F | 53°F | 0.03" | -- |
| 2019 | 78°F | 53°F | 0" | -- |
| 2018 | 72°F | 51°F | 0" | -- |
| 2017 | 78°F | 51°F | 0" | -- |
| 2016 | 77°F | 53°F | 0" | -- |
| 2015 | 82°F | 51°F | 0" | -- |
| 2014 | 71°F | 54°F | 0" | -- |
| 2013 | 81°F | 53°F | 0" | -- |
| 2012 | 63°F | 45°F | 0.1" | -- |
| 2011 | 72°F | 47°F | 0" | -- |
| 2010 | 61°F | 46°F | 1.78" | -- |
| 2009 | 77°F | 44°F | 0" | -- |
| 2008 | 93°F | 52°F | 0" | -- |
| 2007 | 70°F | 50°F | 0" | -- |
| 2006 | 76°F | 49°F | 0" | -- |
| 2005 | 81°F | 51°F | 0" | -- |
| 2004 | 81°F | 51°F | 0" | -- |
| 2003 | 72°F | 55°F | 0" | -- |
| 2002 | 75°F | 54°F | 0" | -- |
| 2001 | 64°F | 49°F | 0" | -- |
| 2000 | 88°F | 56°F | 0" | -- |
| 1999 | 57°F | 45°F | 0.13" | -- |
| 1984 | 90°F | 44°F | 0" | -- |
| 1983 | 56°F | 42°F | 0" | -- |
| 1982 | 66°F | 51°F | 1.02" | -- |
| 1981 | 74°F | 54°F | 0" | -- |
| 1980 | 82°F | 51°F | 0" | -- |
| 1979 | 79°F | 44°F | 0" | -- |
| 1978 | 69°F | 53°F | 0" | -- |
| 1977 | 80°F | 41°F | 0" | -- |
| 1976 | 60°F | 43°F | 0" | -- |
| 1975 | 65°F | 39°F | 0" | -- |
| 1974 | 76°F | 46°F | 0" | -- |
| 1973 | 77°F | 44°F | 0" | -- |
| 1972 | 76°F | 43°F | 0" | -- |
| 1971 | 79°F | 43°F | 0" | -- |
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.