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St. Helena March Weather

Averages and records for weather in St. Helena, California in the month of March.

Typical St. Helena March Weather 1991–2020
Average daily high	67.1 °F
Average daily low	43.5 °F
Average monthly precipitation	4.8 inches
Average monthly snow	none
Daily chance of precipitation	32.0%
Daily chance of snow	0%

St. Helena March Weather Records 1907–2023
Highest temperature	95 °F	March 17, 1914
Lowest temperature	24 °F	March 5, 1971
Highest daily low	63 °F	March 16, 2004
Lowest daily high	38 °F	March 25, 1920
Hottest average high temperature	76.4 °F	2015
Coldest average high temperature	57.3 °F	2006
Most daily precipitation	6.4 inches	March 9, 1995
Most monthly precipitation	16.8 inches	1995
Most daily snow	4.0 inches	March 2, 1976
Most monthly snow	4.0 inches	1976

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
March 1	64.2	42.3	82	27
March 2	64.3	42.4	82	26
March 3	64.5	42.5	85	24
March 4	64.8	42.5	82	27
March 5	65.1	42.6	81	24
March 6	65.5	42.7	81	26
March 7	65.7	42.8	82	28
March 8	65.8	43.0	83	29
March 9	65.8	43.1	85	27
March 10	65.9	43.2	88	27
March 11	66.0	43.2	88	27
March 12	66.1	43.2	87	24
March 13	66.3	43.3	84	28
March 14	66.5	43.4	85	27
March 15	66.8	43.5	85	28
March 16	67.1	43.6	91	30
March 17	67.3	43.6	95	27
March 18	67.5	43.7	90	29
March 19	67.7	43.8	88	29
March 20	68.0	43.9	84	28
March 21	68.2	44.0	83	29
March 22	68.4	44.0	86	29
March 23	68.5	44.1	87	30
March 24	68.6	44.2	87	27
March 25	68.6	44.3	84	28
March 26	68.6	44.3	86	28
March 27	68.6	44.3	87	29
March 28	68.6	44.4	86	30
March 29	68.7	44.4	89	31
March 30	68.8	44.4	86	30
March 31	68.9	44.4	90	29

Weather Station Details

Years	Station	Coordinates
1907–2023	Saint Helena	location