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Fullerton, CA Weather on August 26
August 26th in Fullerton, CA typically brings warm summer weather, with average highs around 89°F and lows near 64°F — a 25°F daily swing. Over 55 years of records, the warmest August 26th was in 1981 (85°F average), while the coldest was 1973 (67°F) — a 18°F range across recorded history. This date has historically been dry, with little recorded precipitation. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
What to Expect on August 26
Planning for August 26th in Fullerton, CA? Stay hydrated and seek shade during peak afternoon hours.
August 26 Weather Records for Fullerton
- •The all-time record high for August 26th in Fullerton, CA is 106°F, set in 1981.
- •The coldest August 26th on record dropped to 54°F in 1978.
- •Temperatures have reached 90°F or higher on August 26th in 26 of the last 55 years.
- •Last year (1971), August 26th was 9°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest August 26 ever in Fullerton?
The warmest August 26 in Fullerton, CA reached 106°F in 1981. That is 17°F above the long-term average high of 89°F.
What was the coldest August 26 ever in Fullerton?
The coldest August 26 in Fullerton, CA dropped to 54°F in 1978. That is 10°F below the long-term average low of 64°F.
What is the average temperature on August 26 in Fullerton?
On August 26, Fullerton averages a high of 89°F and a low of 64°F based on 55 years of NOAA weather observations from ANAHEIM.
How many years of weather data are available for August 26 in Fullerton?
We have 55 years of weather records for August 26 in Fullerton, CA, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 26 Weather History in Fullerton
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 85°F | 68°F | 0" | -- |
| 2024 | 88°F | 63°F | 0" | -- |
| 2023 | 94°F | 64°F | 0" | -- |
| 2022 | 93°F | 70°F | 0" | -- |
| 2021 | 100°F | 68°F | 0" | -- |
| 2020 | 94°F | 70°F | 0" | -- |
| 2019 | 94°F | 70°F | 0" | -- |
| 2018 | 87°F | 68°F | 0" | -- |
| 2017 | 90°F | 67°F | 0" | -- |
| 2016 | 81°F | 65°F | 0" | -- |
| 2015 | 96°F | 74°F | 0" | -- |
| 2014 | 88°F | 65°F | 0" | -- |
| 2013 | 94°F | 67°F | 0" | -- |
| 2012 | 85°F | 65°F | 0" | -- |
| 2011 | 98°F | 68°F | 0" | -- |
| 2010 | 98°F | 70°F | 0" | -- |
| 2009 | 101°F | 63°F | 0" | -- |
| 2008 | 86°F | 67°F | 0" | -- |
| 2007 | 91°F | 68°F | 0" | -- |
| 2006 | 89°F | 65°F | 0" | -- |
| 2005 | 97°F | 70°F | 0" | -- |
| 2004 | 82°F | 67°F | 0" | -- |
| 2003 | 92°F | 69°F | 0" | -- |
| 2002 | 82°F | 56°F | 0" | -- |
| 2001 | 89°F | 62°F | 0" | -- |
| 2000 | 85°F | 63°F | 0" | -- |
| 1999 | 93°F | 66°F | 0" | -- |
| 1998 | 85°F | 66°F | 0" | -- |
| 1997 | 85°F | 61°F | 0" | -- |
| 1996 | 92°F | 63°F | 0" | -- |
| 1995 | 90°F | 57°F | 0" | -- |
| 1994 | 86°F | 64°F | 0" | -- |
| 1993 | 92°F | 67°F | 0" | -- |
| 1992 | 91°F | 62°F | 0" | -- |
| 1991 | 81°F | 64°F | 0" | -- |
| 1990 | 80°F | 59°F | 0" | -- |
| 1989 | 79°F | 63°F | 0" | -- |
| 1988 | 88°F | 68°F | 0" | -- |
| 1987 | 79°F | 58°F | 0" | -- |
| 1986 | 89°F | 64°F | 0" | -- |
| 1985 | 95°F | 68°F | 0" | -- |
| 1984 | 85°F | 68°F | 0" | -- |
| 1983 | 87°F | 61°F | 0" | -- |
| 1982 | 95°F | 65°F | 0" | -- |
| 1981 | 106°F | 65°F | 0" | -- |
| 1980 | 90°F | 56°F | 0" | -- |
| 1979 | 89°F | 58°F | 0" | -- |
| 1978 | 85°F | 54°F | 0" | -- |
| 1977 | 83°F | 62°F | 0" | -- |
| 1976 | 91°F | 56°F | 0" | -- |
| 1975 | 84°F | 56°F | 0" | -- |
| 1974 | 91°F | 55°F | 0" | -- |
| 1973 | 76°F | 59°F | 0" | -- |
| 1972 | 81°F | 63°F | 0" | -- |
| 1971 | 98°F | 56°F | 0" | -- |
Based on 55 years of data from NOAA station: ANAHEIM
Monthly Climate Averages
Historical temperature and precipitation averages for Fullerton, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.