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San Marcos, CA Weather on October 11
October 11th in San Marcos, CA typically brings warm fall weather, with average highs around 80°F and lows near 56°F. Over 55 years of records, the warmest October 11th was in 1991 (83°F average), while the coldest was 1973 (59°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 11% of October 11th dates historically, with the wettest October 11th recording 1.37" of rain. The last decade has been 1.9°F warmer on this date compared to 20-30 years ago.
What to Expect on October 11
Planning for October 11th in San Marcos, CA? Stay hydrated and seek shade during peak afternoon hours.
October 11 Weather Records for San Marcos
- •The all-time record high for October 11th in San Marcos, CA is 99°F, set in 2015.
- •The coldest October 11th on record dropped to 43°F in 1973.
- •Temperatures have reached 90°F or higher on October 11th in 9 of the last 55 years.
- •Last year (1971), October 11th was 13°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest October 11 ever in San Marcos?
The warmest October 11 in San Marcos, CA reached 99°F in 2015. That is 19°F above the long-term average high of 80°F.
What was the coldest October 11 ever in San Marcos?
The coldest October 11 in San Marcos, CA dropped to 43°F in 1973. That is 13°F below the long-term average low of 56°F.
What is the average temperature on October 11 in San Marcos?
On October 11, San Marcos averages a high of 80°F and a low of 56°F based on 55 years of NOAA weather observations from ESCONDIDO #2.
How many years of weather data are available for October 11 in San Marcos?
We have 55 years of weather records for October 11 in San Marcos, 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 11 Weather History in San Marcos
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 87°F | 62°F | 0" | -- |
| 2024 | 92°F | 57°F | 0" | -- |
| 2023 | 74°F | 61°F | 0.05" | -- |
| 2022 | 80°F | 64°F | 0" | -- |
| 2021 | 71°F | 52°F | 0" | -- |
| 2020 | 80°F | 60°F | 0" | -- |
| 2019 | 90°F | 52°F | 0" | -- |
| 2018 | 74°F | 61°F | 0" | -- |
| 2017 | 78°F | 56°F | 0" | -- |
| 2016 | 77°F | 60°F | 0" | -- |
| 2015 | 99°F | 68°F | 0" | -- |
| 2014 | 84°F | 61°F | 0" | -- |
| 2013 | 75°F | 49°F | 0" | -- |
| 2012 | 69°F | 57°F | 0" | -- |
| 2011 | 83°F | 55°F | 0" | -- |
| 2010 | 87°F | 59°F | 0" | -- |
| 2009 | 68°F | 59°F | 0" | -- |
| 2008 | 67°F | 53°F | 0" | -- |
| 2007 | 68°F | 57°F | 0" | -- |
| 2006 | 77°F | 54°F | 0" | -- |
| 2005 | 70°F | 58°F | 0" | -- |
| 2004 | 78°F | 54°F | 0" | -- |
| 2003 | 72°F | 63°F | 0" | -- |
| 2002 | 78°F | 58°F | 0" | -- |
| 2001 | 86°F | 54°F | 0" | -- |
| 2000 | 69°F | 52°F | 0.09" | -- |
| 1999 | 94°F | 57°F | 0" | -- |
| 1998 | 81°F | 52°F | 0" | -- |
| 1997 | 75°F | 57°F | 0" | -- |
| 1996 | 90°F | 55°F | 0" | -- |
| 1995 | 79°F | 56°F | 0" | -- |
| 1994 | 91°F | 55°F | 0" | -- |
| 1993 | 78°F | 63°F | 0.03" | -- |
| 1992 | 83°F | 54°F | 0" | -- |
| 1991 | 99°F | 67°F | 0" | -- |
| 1990 | 88°F | 49°F | 0" | -- |
| 1989 | 82°F | 56°F | 0" | -- |
| 1988 | 89°F | 59°F | 0" | -- |
| 1987 | 74°F | 57°F | 0.39" | -- |
| 1986 | 67°F | 59°F | 1.37" | -- |
| 1985 | 77°F | 52°F | 0" | -- |
| 1984 | 73°F | 64°F | 0" | -- |
| 1983 | 93°F | 54°F | 0" | -- |
| 1982 | 85°F | 54°F | 0" | -- |
| 1981 | 72°F | 57°F | 0.16" | -- |
| 1980 | 85°F | 55°F | 0" | -- |
| 1979 | 78°F | 60°F | 0" | -- |
| 1978 | 84°F | 55°F | 0" | -- |
| 1977 | 83°F | 58°F | 0" | -- |
| 1976 | 84°F | 50°F | 0" | -- |
| 1975 | 71°F | 53°F | 0" | -- |
| 1974 | 74°F | 49°F | 0" | -- |
| 1973 | 76°F | 43°F | 0" | -- |
| 1972 | 80°F | 47°F | 0" | -- |
| 1971 | 93°F | 54°F | 0" | -- |
Based on 55 years of data from NOAA station: ESCONDIDO #2
Monthly Climate Averages
Historical temperature and precipitation averages for San Marcos, CA, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.