W.carter / CC BY-SA 4.0
San Bernardino, CA Weather on August 25
August 25th in San Bernardino, CA typically brings hot summer weather, with average highs around 95°F and lows near 64°F — a 31°F daily swing. Over 48 years of records, the warmest August 25th was in 1985 (90°F average), while the coldest was 1983 (67°F) — a 23°F range across recorded history. This date has historically been dry, with little recorded precipitation.
What to Expect on August 25
Planning for August 25th in San Bernardino, CA? Stay hydrated and seek shade during peak afternoon hours.
August 25 Weather Records for San Bernardino
- •The all-time record high for August 25th in San Bernardino, CA is 110°F, set in 1985.
- •The coldest August 25th on record dropped to 52°F in 1978.
- •Temperatures have reached 90°F or higher on August 25th in 36 of the last 48 years.
- •Last year (1971), August 25th was 5°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest August 25 ever in San Bernardino?
The warmest August 25 in San Bernardino, CA reached 110°F in 1985. That is 15°F above the long-term average high of 95°F.
What was the coldest August 25 ever in San Bernardino?
The coldest August 25 in San Bernardino, CA dropped to 52°F in 1978. That is 12°F below the long-term average low of 64°F.
What is the average temperature on August 25 in San Bernardino?
On August 25, San Bernardino averages a high of 95°F and a low of 64°F based on 48 years of NOAA weather observations from NORTON AFB.
How many years of weather data are available for August 25 in San Bernardino?
We have 48 years of weather records for August 25 in San Bernardino, 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 25 Weather History in San Bernardino
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 100°F | 73°F | -- | -- |
| 2017 | 90°F | 63°F | -- | -- |
| 2016 | 89°F | 63°F | -- | -- |
| 2015 | 87°F | 74°F | -- | -- |
| 2014 | 86°F | 62°F | 0" | -- |
| 2013 | 98°F | 68°F | 0" | -- |
| 2012 | 89°F | 64°F | 0" | -- |
| 2011 | 105°F | 67°F | 0" | -- |
| 2010 | 107°F | 70°F | 0" | -- |
| 2009 | 99°F | 61°F | 0" | -- |
| 2008 | 103°F | 68°F | 0" | -- |
| 2007 | 94°F | 64°F | 0" | -- |
| 2006 | 89°F | 63°F | -- | -- |
| 2005 | 101°F | 66°F | 0" | -- |
| 2004 | 88°F | 58°F | 0" | -- |
| 2003 | 100°F | 70°F | 0" | -- |
| 2002 | 97°F | 58°F | 0" | -- |
| 2001 | 103°F | 64°F | 0" | -- |
| 2000 | 97°F | 63°F | 0" | -- |
| 1999 | 107°F | 70°F | 0" | -- |
| 1998 | 97°F | 66°F | 0" | -- |
| 1997 | 96°F | 65°F | 0" | -- |
| 1996 | 101°F | 69°F | 0" | -- |
| 1995 | 97°F | 64°F | 0" | -- |
| 1994 | 99°F | 59°F | 0" | -- |
| 1993 | 96°F | 65°F | 0" | -- |
| 1992 | 90°F | 63°F | 0" | -- |
| 1991 | 103°F | 60°F | 0" | -- |
| 1990 | 82°F | 62°F | 0" | -- |
| 1989 | 80°F | 58°F | 0" | -- |
| 1988 | 97°F | 72°F | 0" | -- |
| 1987 | 85°F | 57°F | 0" | -- |
| 1986 | 101°F | 62°F | 0" | -- |
| 1985 | 110°F | 70°F | 0" | -- |
| 1984 | 93°F | 64°F | 0" | -- |
| 1983 | 74°F | 61°F | 0" | -- |
| 1982 | 94°F | 66°F | 0" | -- |
| 1981 | 109°F | 70°F | 0" | -- |
| 1980 | 94°F | 63°F | 0" | -- |
| 1979 | 98°F | 64°F | 0" | -- |
| 1978 | 90°F | 52°F | 0" | -- |
| 1977 | 90°F | 61°F | 0" | -- |
| 1976 | 98°F | 62°F | 0" | -- |
| 1975 | 99°F | 56°F | 0" | -- |
| 1974 | 101°F | 60°F | 0" | -- |
| 1973 | 82°F | 57°F | 0" | -- |
| 1972 | 85°F | 63°F | 0" | -- |
| 1971 | 100°F | 60°F | 0" | -- |
Based on 48 years of data from NOAA station: NORTON AFB
Monthly Climate Averages
Historical temperature and precipitation averages for San Bernardino, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.