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St. Helena October Weather

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

Typical St. Helena October Weather 1991–2020
Average daily high	78.2 °F
Average daily low	48.8 °F
Average monthly precipitation	1.6 inches
Average monthly snow	none
Daily chance of precipitation	10.2%
Daily chance of snow	0%

St. Helena October Weather Records 1907–2023
Highest temperature	104 °F	October 5, 1933
Lowest temperature	22 °F	October 16, 2019
Highest daily low	75 °F	October 16, 2020
Lowest daily high	43 °F	October 20, 1920
Hottest average high temperature	84.8 °F	1915
Coldest average high temperature	68.7 °F	1916
Most daily precipitation	9.9 inches	October 24, 2021
Most monthly precipitation	11.8 inches	1962
Most daily snow	none	-
Most monthly snow	none	-

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
October 1	83.2	51.1	103	32
October 2	83.0	51.1	101	22
October 3	82.8	50.9	104	35
October 4	82.5	50.8	103	35
October 5	82.2	50.6	104	35
October 6	81.9	50.5	101	33
October 7	81.7	50.3	101	32
October 8	81.4	50.2	103	35
October 9	81.1	50.0	102	35
October 10	80.8	49.9	103	34
October 11	80.4	49.8	96	30
October 12	80.0	49.7	98	22
October 13	79.8	49.5	98	22
October 14	79.4	49.3	101	22
October 15	78.9	49.1	100	22
October 16	78.6	48.9	98	22
October 17	78.2	48.8	99	32
October 18	77.9	48.7	98	32
October 19	77.6	48.4	98	34
October 20	77.4	48.3	95	27
October 21	77.0	48.1	98	30
October 22	76.6	47.9	96	30
October 23	76.1	47.8	96	32
October 24	75.6	47.7	99	30
October 25	75.2	47.5	95	29
October 26	74.8	47.3	95	28
October 27	74.3	47.1	94	31
October 28	73.8	47.0	93	26
October 29	73.3	46.8	91	23
October 30	73.0	46.6	93	27
October 31	72.6	46.4	94	26

Weather Station Details

Years	Station	Coordinates
1907–2023	Saint Helena	location