San Francisco Weather in 1940

Historical record of San Francisco, California weather for the year 1940 based on NOAA data.

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1940 San Francisco Weather Extremes
Highest temperature	84 °F	October 11
Lowest temperature	38 °F	January 18
Highest daily low	64 °F	September 16
Lowest daily high	45 °F	January 19
Most daily precipitation	2.2 inches	March 30
Most daily snow	none	-
Total annual precipitation	34.9 inches	-
Total annual snow	none	-

What was the hottest temperature in San Francisco in 1940?

The highest temperature recorded in San Francisco, California in 1940 was 84 °F which happened on October 11.

Highest Temperatures: All-Time By Year

Highest Temperatures in San Francisco in 1940

Rank	Temperature	Date
1	84 °F	Oct 11
2	83 °F	Sep 29
3	82 °F	Oct 18
4	81 °F	Oct 12
4	81 °F	Aug 10
6	80 °F	Oct 19
6	80 °F	Sep 30
6	80 °F	Apr 12
6	80 °F	Apr 11
10	79 °F	Oct 17
10	79 °F	Jul 5

What was the coldest temperature in San Francisco in 1940?

The lowest temperature recorded in San Francisco, California in 1940 was 38 °F which happened on Jan 18.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in San Francisco in 1940

Rank	Temperature	Date
1	38 °F	January 18
2	39 °F	January 22
2	39 °F	January 21
2	39 °F	January 20
5	40 °F	January 19
6	42 °F	December 14
7	44 °F	December 13
7	44 °F	January 15
9	45 °F	December 31
9	45 °F	December 15
9	45 °F	January 23
9	45 °F	January 17
9	45 °F	January 16
9	45 °F	January 14
9	45 °F	January 13

January 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	61	55	1.21
January 2	62	53	0.90
January 3	59	52	1.26
January 4	59	52	0.03
January 5	56	47	0.76
January 6	52	46	0.01
January 7	58	48	1.38
January 8	59	57	0.11
January 9	60	53	0.53
January 10	60	51	0.88
January 11	59	53	0.27
January 12	58	49	0.00
January 13	55	45	0.00
January 14	58	45	0.00
January 15	57	44	0.00
January 16	60	45	0.00
January 17	54	45	0.00
January 18	46	38	0.00
January 19	45	40	0.00
January 20	46	39	0.00
January 21	47	39	0.00
January 22	46	39	0.02
January 23	53	45	0.02
January 24	55	48	0.16
January 25	60	51	1.78
January 26	64	53	0.20
January 27	65	52	0.00
January 28	61	52	0.00
January 29	67	54	0.00
January 30	60	52	0.18
January 31	61	54	0.33

February 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	63	53	0.06
February 2	58	52	0.01
February 3	63	53	0.63
February 4	63	55	0.09
February 5	61	55	0.02
February 6	59	53	0.21
February 7	59	52	0.00
February 8	66	50	0.00
February 9	63	50	0.00
February 10	59	52	0.00
February 11	59	46	0.00
February 12	60	47	0.00
February 13	57	49	0.58
February 14	57	48	0.40
February 15	57	49	0.00
February 16	60	49	0.00
February 17	57	48	0.75
February 18	57	46	0.00
February 19	60	46	0.00
February 20	61	49	0.00
February 21	60	53	0.00
February 22	56	52	0.02
February 23	60	53	0.08
February 24	61	52	0.09
February 25	58	55	0.89
February 26	60	55	1.57
February 27	61	57	1.16
February 28	62	49	1.18
February 29	59	50	0.07

March 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	60	49	0.00
March 2	64	52	0.01
March 3	69	55	0.00
March 4	68	53	0.00
March 5	66	51	0.00
March 6	72	52	0.00
March 7	72	55	0.00
March 8	60	53	0.00
March 9	55	48	0.00
March 10	54	48	0.00
March 11	56	47	0.00
March 12	62	47	0.00
March 13	65	50	0.00
March 14	69	52	0.00
March 15	64	52	0.12
March 16	60	52	0.02
March 17	70	51	0.00
March 18	69	55	0.00
March 19	64	54	0.00
March 20	69	52	0.00
March 21	60	51	0.00
March 22	59	52	0.00
March 23	62	51	0.00
March 24	60	53	0.06
March 25	62	52	0.02
March 26	60	55	0.80
March 27	61	55	0.00
March 28	63	51	0.32
March 29	63	56	1.79
March 30	56	51	2.18
March 31	60	50	0.00

April 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	61	50	0.00
April 2	57	50	0.00
April 3	61	50	0.37
April 4	59	51	0.00
April 5	61	51	0.00
April 6	63	52	0.00
April 7	65	55	0.11
April 8	62	55	0.13
April 9	63	53	0.00
April 10	72	52	0.00
April 11	80	55	0.00
April 12	80	59	0.00
April 13	76	54	0.00
April 14	60	52	0.00
April 15	62	50	0.00
April 16	67	51	0.00
April 17	70	53	0.00
April 18	68	54	0.00
April 19	61	52	0.00
April 20	69	49	0.00
April 21	58	49	0.00
April 22	58	50	0.00
April 23	58	49	0.00
April 24	58	51	0.00
April 25	57	50	0.27
April 26	59	49	0.06
April 27	60	49	0.00
April 28	60	51	0.00
April 29	63	52	0.00
April 30	67	53	0.00

May 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	61	53	0.00
May 2	62	54	0.07
May 3	64	51	0.04
May 4	61	53	0.16
May 5	62	51	0.00
May 6	61	50	0.00
May 7	64	51	0.00
May 8	72	52	0.00
May 9	65	54	0.00
May 10	64	51	0.00
May 11	64	51	0.00
May 12	67	50	0.00
May 13	76	52	0.00
May 14	67	52	0.00
May 15	64	51	0.00
May 16	62	52	0.00
May 17	62	52	0.00
May 18	67	52	0.00
May 19	67	51	0.00
May 20	60	52	0.00
May 21	63	54	0.00
May 22	63	53	0.00
May 23	58	52	0.00
May 24	62	52	0.00
May 25	62	51	0.00
May 26	62	50	0.00
May 27	57	50	0.00
May 28	57	52	0.00
May 29	68	51	0.03
May 30	68	56	0.33
May 31	72	58	0.00

June 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	64	56	0.01
June 2	65	55	0.00
June 3	60	54	0.00
June 4	67	53	0.00
June 5	67	52	0.00
June 6	68	52	0.00
June 7	72	55	0.00
June 8	72	54	0.00
June 9	60	51	0.00
June 10	61	51	0.00
June 11	60	52	0.00
June 12	63	52	0.00
June 13	64	51	0.00
June 14	62	53	0.00
June 15	62	52	0.00
June 16	65	56	0.00
June 17	65	57	0.00
June 18	63	55	0.00
June 19	65	54	0.00
June 20	70	54	0.00
June 21	60	53	0.00
June 22	66	53	0.00
June 23	60	52	0.00
June 24	61	53	0.00
June 25	58	52	0.00
June 26	70	55	0.00
June 27	65	54	0.00
June 28	66	56	0.00
June 29	64	57	0.00
June 30	63	57	0.00

July 1940 San Francisco Weather

Day	High (°F)	Low (°F)
July 1	63	55
July 2	67	54
July 3	64	55
July 4	67	54
July 5	79	56
July 6	65	55
July 7	60	53
July 8	60	52
July 9	64	53
July 10	63	55
July 11	64	55
July 12	67	57
July 13	62	55
July 14	61	55
July 15	64	56
July 16	64	56
July 17	63	56
July 18	65	57
July 19	64	55
July 20	66	55
July 21	65	56
July 22	62	55
July 23	73	54
July 24	73	57
July 25	68	56
July 26	65	55
July 27	63	54
July 28	69	55
July 29	64	55
July 30	66	55
July 31	64	55

August 1940 San Francisco Weather

Day	High (°F)	Low (°F)
August 1	65	56
August 2	66	55
August 3	66	55
August 4	64	55
August 5	65	56
August 6	67	56
August 7	62	54
August 8	62	54
August 9	63	54
August 10	81	55
August 11	61	55
August 12	65	55
August 13	64	55
August 14	59	54
August 15	66	55
August 16	71	59
August 17	69	59
August 18	67	58
August 19	69	57
August 20	63	54
August 21	59	54
August 22	60	55
August 23	63	55
August 24	64	56
August 25	64	56
August 26	59	54
August 27	64	54
August 28	67	54
August 29	62	54
August 30	70	53
August 31	62	55

September 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	65	56	0.00
September 2	64	57	0.00
September 3	66	57	0.42
September 4	63	55	0.00
September 5	68	57	0.08
September 6	70	60	0.05
September 7	74	60	0.00
September 8	70	59	0.00
September 9	71	60	0.00
September 10	73	59	0.00
September 11	72	59	0.00
September 12	75	63	0.00
September 13	73	60	0.00
September 14	70	59	0.00
September 15	72	62	0.00
September 16	74	64	0.02
September 17	70	63	0.01
September 18	68	61	0.00
September 19	74	59	0.00
September 20	76	58	0.00
September 21	69	57	0.00
September 22	63	57	0.00
September 23	68	60	0.00
September 24	71	60	0.00
September 25	72	59	0.00
September 26	69	60	0.01
September 27	70	59	0.00
September 28	71	58	0.00
September 29	83	59	0.00
September 30	80	59	0.00

October 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	65	56	0.00
October 2	64	55	0.00
October 3	65	53	0.00
October 4	68	55	0.00
October 5	64	54	0.00
October 6	72	54	0.00
October 7	68	56	0.15
October 8	68	57	0.00
October 9	70	55	0.00
October 10	75	57	0.00
October 11	84	58	0.00
October 12	81	54	0.00
October 13	78	58	0.00
October 14	66	52	0.00
October 15	70	51	0.00
October 16	69	53	0.00
October 17	79	61	0.00
October 18	82	61	0.00
October 19	80	60	0.00
October 20	66	57	0.00
October 21	66	57	0.00
October 22	63	57	0.00
October 23	66	56	0.00
October 24	66	58	0.68
October 25	62	55	0.00
October 26	60	53	0.00
October 27	62	52	0.00
October 28	64	53	0.09
October 29	65	56	0.13
October 30	65	53	0.00
October 31	65	56	0.00

November 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	67	56	0.42
November 2	62	52	0.04
November 3	59	49	0.21
November 4	61	51	0.00
November 5	60	52	0.85
November 6	60	55	0.58
November 7	64	56	0.07
November 8	60	52	0.00
November 9	59	52	0.01
November 10	61	50	0.00
November 11	62	49	0.00
November 12	66	54	0.00
November 13	65	55	0.00
November 14	73	56	0.00
November 15	73	53	0.00
November 16	66	54	0.00
November 17	61	54	0.04
November 18	64	53	0.00
November 19	64	53	0.00
November 20	57	50	0.00
November 21	59	49	0.00
November 22	60	49	0.00
November 23	59	47	0.00
November 24	55	48	0.00
November 25	65	47	0.00
November 26	65	48	0.00
November 27	61	48	0.00
November 28	66	51	0.00
November 29	61	52	0.00
November 30	64	48	0.00

December 1940 San Francisco Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	65	48	0.00
December 2	65	50	0.00
December 3	70	52	0.00
December 4	67	51	0.00
December 5	65	49	0.00
December 6	64	47	0.00
December 7	63	46	0.00
December 8	65	51	0.00
December 9	71	52	0.00
December 10	67	47	0.00
December 11	61	47	0.00
December 12	53	46	0.00
December 13	53	44	0.00
December 14	53	42	0.00
December 15	50	45	0.20
December 16	60	48	0.95
December 17	65	56	0.22
December 18	63	53	0.14
December 19	63	52	0.00
December 20	62	57	0.23
December 21	58	54	1.01
December 22	60	51	0.73
December 23	63	55	0.23
December 24	61	50	0.60
December 25	61	51	0.55
December 26	58	50	0.88
December 27	58	54	0.37
December 28	56	52	0.06
December 29	58	53	0.08
December 30	58	49	0.00
December 31	55	45	0.00

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Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location