Alleghany CDP, California

Official LSAD Designation: Alleghany CDP • Census GEOID: 0600982 • Sierra County

Climate Normals & Weather Observations

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

Reference Weather Station: DOWNIEVILLE, CA US (ID: USC00042500) • Located 6.7 miles from community center • Elevation: 888.5 m

Month	Average High (°F)	Average Low (°F)	Mean Temp (°F)	Precipitation (in)
January	48.1°	29.9°	39.0°	11.26"
February	52.3°	30.7°	41.5°	10.73"
March	57.6°	33.0°	45.3°	10.00"
April	63.3°	35.7°	49.5°	5.34"
May	72.1°	41.8°	57.0°	3.65"
June	81.3°	46.4°	63.8°	1.07"
July	89.2°	51.3°	70.2°	0.06"
August	88.6°	49.9°	69.3°	0.19"
September	83.4°	45.9°	64.7°	0.66"
October	71.8°	39.1°	55.4°	3.34"
November	55.7°	33.0°	44.3°	6.81"
December	46.2°	29.2°	37.7°	11.81"

2010–2025, completed calendar years only.

NOAA station DOWNIEVILLE, CA US (ID: USC00042500) • 6.7 miles from community center .

This is the same reference station used for monthly normals.

Show annual mean of daily highs and lows

Annual mean Annual mean of daily highs Annual mean of daily lows

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	52.2	65.6	38.9
2011	51.3	65.5	37.1
2012	Unavailable	Unavailable	Unavailable
2013	Unavailable	Unavailable	Unavailable
2014	55.3	70.1	40.6
2015	55.5	70.7	40.2
2016	53.8	68.0	39.6
2017	54.1	68.0	40.2
2018	54.3	69.2	39.3
2019	52.5	66.1	38.8
2020	54.6	69.9	39.3
2021	54.2	68.7	39.7
2022	53.5	68.5	38.6
2023	52.2	65.7	38.8
2024	54.2	68.3	40.1
2025	54.8	69.0	40.5

Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.