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Janesville CDP, California

Official LSAD Designation: Janesville CDP • Census GEOID: 0637134 • Lassen County

Climate Normals & Weather Observations

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

Reference Weather Station: SUSANVILLE 2SW, CA US (ID: USC00048702) • Located 12.1 miles from community center • Elevation: 1,283.8 m
Month Average High (°F) Average Low (°F) Mean Temp (°F) Precipitation (in)
January 42.7° 22.3° 32.5° 2.44"
February 47.6° 25.6° 36.6° 2.31"
March 54.2° 29.6° 41.9° 1.67"
April 60.5° 33.8° 47.1° 0.49"
May 69.3° 40.2° 54.8° 0.82"
June 78.9° 47.0° 62.9° 0.37"
July 88.0° 53.1° 70.6° 0.21"
August 86.6° 52.0° 69.3° 0.11"
September 80.0° 45.3° 62.7° 0.24"
October 67.0° 35.9° 51.5° 0.97"
November 51.9° 28.1° 40.0° 1.49"
December 42.6° 22.3° 32.4° 1.90"

Annual Temperature History

2010–2025, completed calendar years only.

NOAA station SUSANVILLE 2SW, CA US (ID: USC00048702) • 12.1 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 SUSANVILLE 2SW, 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. 31.0 41.0 51.0 61.0 71.0 2010 2014 2018 2021 2025 Year Annual mean temperature (°F) 2011: Annual mean 48.8°F 2013: Annual mean 49.0°F 2014: Annual mean 52.7°F 2015: Annual mean 52.5°F 2016: Annual mean 51.8°F 2017: Annual mean 51.1°F 2018: Annual mean 51.0°F 2019: Annual mean 49.4°F 2022: Annual mean 49.8°F 2011: Annual mean of daily highs 62.5°F 2013: Annual mean of daily highs 63.6°F 2014: Annual mean of daily highs 67.0°F 2015: Annual mean of daily highs 66.9°F 2016: Annual mean of daily highs 65.7°F 2017: Annual mean of daily highs 64.6°F 2018: Annual mean of daily highs 65.0°F 2019: Annual mean of daily highs 62.9°F 2021: Annual mean of daily highs 66.2°F 2022: Annual mean of daily highs 64.8°F 2010: Annual mean of daily lows 37.0°F 2011: Annual mean of daily lows 35.1°F 2013: Annual mean of daily lows 34.3°F 2014: Annual mean of daily lows 38.5°F 2015: Annual mean of daily lows 38.1°F 2016: Annual mean of daily lows 37.9°F 2017: Annual mean of daily lows 37.6°F 2018: Annual mean of daily lows 37.0°F 2019: Annual mean of daily lows 35.9°F 2020: Annual mean of daily lows 36.1°F 2022: Annual mean of daily lows 34.8°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 Unavailable Unavailable 37.0
2011 48.8 62.5 35.1
2012 Unavailable Unavailable Unavailable
2013 49.0 63.6 34.3
2014 52.7 67.0 38.5
2015 52.5 66.9 38.1
2016 51.8 65.7 37.9
2017 51.1 64.6 37.6
2018 51.0 65.0 37.0
2019 49.4 62.9 35.9
2020 Unavailable Unavailable 36.1
2021 Unavailable 66.2 Unavailable
2022 49.8 64.8 34.8
2023 Unavailable Unavailable Unavailable
2024 Unavailable Unavailable Unavailable
2025 Unavailable Unavailable Unavailable
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.