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Lake San Marcos CDP, California

Official LSAD Designation: Lake San Marcos CDP • Census GEOID: 0639724 • San Diego County

Climate Normals & Weather Observations

30-year climate normals (1991–2020) and weather observations for Lake San Marcos CDP.

Reference Weather Station: CARLSBAD PALOMAR AP, CA US (ID: USW00003177) • Located 4.2 miles from community center • Elevation: 100.0 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 65.0° 47.8° 56.4° 2.49"
February 64.0° 48.5° 56.3° 2.64"
March 64.5° 50.8° 57.6° 1.61"
April 66.3° 53.3° 59.8° 0.88"
May 67.6° 57.4° 62.5° 0.28"
June 69.9° 60.3° 65.1° 0.06"
July 74.2° 64.1° 69.2° 0.08"
August 75.8° 65.3° 70.5° 0.03"
September 75.7° 63.6° 69.6° 0.11"
October 73.3° 58.9° 66.1° 0.50"
November 69.5° 52.1° 60.8° 0.99"
December 64.6° 47.3° 56.0° 1.72"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station CARLSBAD PALOMAR AP, CA US (ID: USW00003177) • 4.2 miles from community center .

This is the same reference station used for monthly normals.

Annual mean Annual mean of daily highs Annual mean of daily lows
Annual temperature history at CARLSBAD PALOMAR AP, CA US Year is the horizontal axis. Annual mean temperature in degrees Fahrenheit is the vertical axis. Dots show recorded years; lines connect consecutive available years only. Missing years are gaps, with no interpolation. Optional dashed lines show annual mean of daily highs and lows. Exact values appear in the data table below. 53.0 58.5 64.0 69.5 75.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2010: Annual mean 61.4°F 2011: Annual mean 62.5°F 2012: Annual mean 62.9°F 2013: Annual mean 63.1°F 2015: Annual mean 65.2°F 2016: Annual mean 64.1°F 2017: Annual mean 63.9°F 2018: Annual mean 63.5°F 2019: Annual mean 63.3°F 2020: Annual mean 63.7°F 2021: Annual mean 62.0°F 2022: Annual mean 63.1°F 2025: Annual mean 62.4°F 2010: Annual mean of daily highs 67.7°F 2011: Annual mean of daily highs 69.1°F 2012: Annual mean of daily highs 69.4°F 2013: Annual mean of daily highs 69.8°F 2015: Annual mean of daily highs 72.2°F 2016: Annual mean of daily highs 70.7°F 2017: Annual mean of daily highs 70.6°F 2018: Annual mean of daily highs 70.0°F 2019: Annual mean of daily highs 69.7°F 2020: Annual mean of daily highs 70.7°F 2021: Annual mean of daily highs 68.3°F 2022: Annual mean of daily highs 70.0°F 2024: Annual mean of daily highs 67.6°F 2025: Annual mean of daily highs 68.7°F 2010: Annual mean of daily lows 55.3°F 2011: Annual mean of daily lows 55.8°F 2012: Annual mean of daily lows 56.5°F 2013: Annual mean of daily lows 56.4°F 2014: Annual mean of daily lows 58.3°F 2015: Annual mean of daily lows 58.2°F 2016: Annual mean of daily lows 57.4°F 2017: Annual mean of daily lows 57.2°F 2018: Annual mean of daily lows 57.0°F 2019: Annual mean of daily lows 56.9°F 2020: Annual mean of daily lows 56.8°F 2021: Annual mean of daily lows 55.6°F 2022: Annual mean of daily lows 56.2°F 2025: Annual mean of daily lows 56.0°F

Source: NOAA NCEI Global Summary of the Year.

Annual temperature data table (°F)
Annual station temperatures, 2010–2025. Unavailable means no reported value.
Year Annual mean (°F) Annual mean of daily highs (°F) Annual mean of daily lows (°F)
2010 61.4 67.7 55.3
2011 62.5 69.1 55.8
2012 62.9 69.4 56.5
2013 63.1 69.8 56.4
2014 Unavailable Unavailable 58.3
2015 65.2 72.2 58.2
2016 64.1 70.7 57.4
2017 63.9 70.6 57.2
2018 63.5 70.0 57.0
2019 63.3 69.7 56.9
2020 63.7 70.7 56.8
2021 62.0 68.3 55.6
2022 63.1 70.0 56.2
2023 Unavailable Unavailable Unavailable
2024 Unavailable 67.6 Unavailable
2025 62.4 68.7 56.0
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.