Napa Weather in 1940

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

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1940 Napa Weather Extremes
Highest temperature	102 °F	August 10
Lowest temperature	28 °F	January 17
Highest daily low	62 °F	September 17
Lowest daily high	46 °F	January 22
Most daily precipitation	3.3 inches	March 30
Total annual precipitation	41.9 inches	-

What was the hottest temperature in Napa in 1940?

The highest temperature recorded in Napa, California in 1940 was 102 °F which happened on August 10.

Highest Temperatures: All-Time By Year

Highest Temperatures in Napa in 1940

Rank	Temperature	Date
1	102 °F	Aug 10
2	101 °F	Jul 5
3	99 °F	Jul 23
4	94 °F	Jul 24
5	91 °F	Oct 18
5	91 °F	Oct 13
5	91 °F	Oct 12
5	91 °F	Jul 25
9	90 °F	Oct 11
9	90 °F	Jul 6

What was the coldest temperature in Napa in 1940?

The lowest temperature recorded in Napa, California in 1940 was 28 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Napa in 1940

Rank	Temperature	Date
1	28 °F	January 17
1	28 °F	January 14
3	29 °F	December 11
4	30 °F	November 23
4	30 °F	January 18
4	30 °F	January 16
4	30 °F	January 15
8	31 °F	December 14
8	31 °F	January 13
10	32 °F	December 31
10	32 °F	January 20
10	32 °F	January 19

January 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	62	47	0.62
January 2	68	55	1.91
January 3	59	47	0.11
January 4	62	48	0.85
January 5	56	40	0.13
January 6	53	42	0.16
January 7	58	48	1.89
January 8	60	51	0.53
January 9	62	52	0.33
January 10	57	50	0.82
January 11	60	51	0.65
January 12	58	48	0.00
January 13	59	31	0.00
January 14	60	28	0.00
January 15	61	30	0.00
January 16	64	30	0.00
January 17	63	28	0.00
January 18	58	30	0.00
January 19	50	32	0.00
January 20	54	32	0.00
January 21	51	35	0.00
January 22	46	36	0.00
January 23	54	41	0.11
January 24	55	44	0.05
January 25	55	49	1.02
January 26	64	52	0.68
January 27	66	48	0.00
January 28	65	51	0.00
January 29	71	50	0.00
January 30	63	47	0.00
January 31	60	50	0.25

February 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	68	48	0.00
February 2	62	48	0.00
February 3	66	51	0.82
February 4	61	52	0.10
February 5	63	52	0.00
February 6	64	52	0.20
February 7	65	40	0.00
February 8	70	38	0.00
February 9	67	40	0.00
February 10	64	45	0.00
February 11	65	34	0.00
February 12	63	37	0.00
February 13	55	40	0.54
February 14	62	45	1.48
February 15	62	34	0.00
February 16	60	44	0.00
February 17	61	48	0.72
February 18	64	36	0.04
February 19	65	33	0.00
February 20	69	37	0.00
February 21	64	45	0.00
February 22	60	47	0.00
February 23	60	50	0.08
February 24	62	49	0.00
February 25	61	50	0.68
February 26	60	54	0.55
February 27	60	56	3.28
February 28	65	54	0.60
February 29	65	44	0.38

March 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	62	39	0.00
March 2	68	45	0.00
March 3	75	53	0.00
March 4	71	46	0.00
March 5	72	41	0.00
March 6	70	43	0.00
March 7	75	45	0.00
March 8	70	45	0.00
March 9	66	38	0.00
March 10	60	33	0.00
March 11	61	33	0.00
March 12	68	34	0.00
March 13	68	36	0.00
March 14	73	37	0.00
March 15	68	45	0.00
March 16	68	51	0.06
March 17	70	42	0.00
March 18	74	42	0.00
March 19	73	49	0.00
March 20	72	46	0.00
March 21	72	49	0.00
March 22	68	44	0.00
March 23	70	46	0.00
March 24	66	54	0.08
March 25	62	50	0.00
March 26	59	54	1.14
March 27	65	52	0.66
March 28	65	50	0.31
March 29	61	55	0.65
March 30	58	53	3.28
March 31	66	45	0.13

April 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	66	40	0.00
April 2	65	45	0.00
April 3	65	45	0.10
April 4	64	40	0.00
April 5	68	40	0.00
April 6	68	41	0.00
April 7	60	50	0.05
April 8	70	54	0.03
April 9	72	42	0.00
April 10	78	45	0.00
April 11	85	48	0.00
April 12	86	52	0.00
April 13	84	51	0.00
April 14	79	49	0.00
April 15	74	41	0.00
April 16	78	47	0.00
April 17	79	49	0.00
April 18	80	48	0.00
April 19	78	48	0.00
April 20	77	40	0.00
April 21	77	43	0.00
April 22	66	49	0.00
April 23	65	40	0.00
April 24	64	41	0.00
April 25	59	46	0.40
April 26	62	46	0.18
April 27	66	46	0.00
April 28	69	44	0.00
April 29	72	45	0.00
April 30	78	46	0.00

May 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	75	45	0.00
May 2	70	51	0.00
May 3	66	38	0.00
May 4	68	50	0.36
May 5	70	40	0.00
May 6	71	41	0.00
May 7	75	41	0.00
May 8	81	44	0.00
May 9	81	51	0.00
May 10	81	48	0.00
May 11	76	47	0.00
May 12	75	45	0.00
May 13	87	50	0.00
May 14	83	48	0.00
May 15	78	49	0.00
May 16	73	53	0.00
May 17	72	51	0.00
May 18	78	52	0.00
May 19	82	50	0.00
May 20	72	54	0.00
May 21	78	50	0.00
May 22	73	54	0.00
May 23	69	52	0.00
May 24	78	52	0.00
May 25	76	49	0.00
May 26	74	47	0.00
May 27	69	45	0.00
May 28	62	50	0.00
May 29	72	46	0.00
May 30	70	55	0.96
May 31	74	50	0.00

June 1940 Napa Weather

Day	High (°F)	Low (°F)
June 1	73	58
June 2	79	54
June 3	75	52
June 4	80	48
June 5	86	47
June 6	83	50
June 7	89	53
June 8	88	54
June 9	82	50
June 10	83	49
June 11	82	51
June 12	82	51
June 13	85	54
June 14	83	51
June 15	78	52
June 16	74	56
June 17	78	57
June 18	76	53
June 19	80	55
June 20	88	53
June 21	85	51
June 22	79	49
June 23	78	48
June 24	74	51
June 25	75	51
June 26	88	55
June 27	85	58
June 28	76	50
June 29	75	56
June 30	78	52

July 1940 Napa Weather

Day	High (°F)	Low (°F)
July 1	77	48
July 2	88	50
July 3	88	53
July 4	88	52
July 5	101	53
July 6	90	54
July 7	84	51
July 8	76	50
July 9	78	46
July 10	84	46
July 11	80	50
July 12	82	55
July 13	80	50
July 14	76	54
July 15	72	55
July 16	73	57
July 17	72	54
July 18	76	51
July 19	78	50
July 20	80	48
July 21	80	49
July 22	83	54
July 23	99	50
July 24	94	54
July 25	91	55
July 26	89	52
July 27	82	55
July 28	78	57
July 29	78	56
July 30	82	52
July 31	82	56

August 1940 Napa Weather

Day	High (°F)	Low (°F)
August 1	82	50
August 2	84	51
August 3	82	58
August 4	80	52
August 5	78	51
August 6	81	50
August 7	84	47
August 8	83	50
August 9	82	52
August 10	102	50
August 11	88	55
August 12	80	56
August 13	78	53
August 14	75	48
August 15	71	52
August 16	80	56
August 17	80	50
August 18	80	50
August 19	85	50
August 20	82	50
August 21	80	50
August 22	71	53
August 23	68	55
August 24	73	52
August 25	72	54
August 26	73	55
August 27	78	53
August 28	88	55
August 29	86	54
August 30	88	56
August 31	86	56

September 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	79	50	0.00
September 2	78	56	0.00
September 3	73	53	0.20
September 4	78	48	0.00
September 5	78	54	0.00
September 6	80	54	0.00
September 7	78	55	0.00
September 8	82	50	0.00
September 9	80	52	0.00
September 10	82	52	0.00
September 11	81	54	0.00
September 12	78	60	0.00
September 13	80	62	0.00
September 14	82	54	0.00
September 15	80	54	0.00
September 16	83	60	0.00
September 17	78	62	0.00
September 18	78	53	0.00
September 19	87	48	0.00
September 20	88	48	0.00
September 21	88	48	0.00
September 22	78	47	0.00
September 23	78	52	0.00
September 24	82	48	0.00
September 25	88	48	0.00
September 26	76	51	0.00
September 27	82	46	0.00
September 28	83	44	0.00
September 29	87	50	0.00
September 30	88	47	0.00

October 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	74	49	0.00
October 2	72	41	0.00
October 3	75	41	0.00
October 4	75	43	0.00
October 5	77	43	0.00
October 6	82	43	0.00
October 7	68	47	0.00
October 8	76	53	0.10
October 9	76	45	0.00
October 10	82	46	0.00
October 11	90	49	0.00
October 12	91	50	0.00
October 13	91	46	0.00
October 14	85	45	0.00
October 15	86	42	0.00
October 16	72	47	0.00
October 17	85	61	0.00
October 18	91	52	0.00
October 19	88	53	0.00
October 20	85	54	0.00
October 21	75	53	0.00
October 22	70	48	0.00
October 23	68	47	0.00
October 24	68	56	0.65
October 25	68	48	0.04
October 26	66	39	0.00
October 27	68	38	0.00
October 28	65	42	0.00
October 29	65	52	0.47
October 30	70	41	0.00
October 31	73	51	0.00

November 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	68	51	0.00
November 2	63	51	0.30
November 3	64	41	0.00
November 4	64	38	0.00
November 5	61	42	0.25
November 6	66	51	0.53
November 7	65	53	0.53
November 8	65	49	0.00
November 9	63	46	0.00
November 10	59	38	0.00
November 11	66	40	0.00
November 12	66	40	0.00
November 13	69	41	0.00
November 14	81	42	0.00
November 15	78	41	0.00
November 16	62	42	0.00
November 17	60	42	0.00
November 18	59	42	0.00
November 19	72	40	0.00
November 20	70	52	0.00
November 21	63	34	0.00
November 22	62	42	0.00
November 23	65	30	0.00
November 24	60	36	0.00
November 25	65	35	0.00
November 26	68	39	0.00
November 27	64	35	0.00
November 28	67	38	0.00
November 29	67	40	0.00
November 30	70	37	0.00

December 1940 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	70	37	0.00
December 2	74	37	0.00
December 3	74	35	0.00
December 4	71	40	0.00
December 5	70	39	0.00
December 6	68	46	0.00
December 7	71	37	0.00
December 8	70	35	0.00
December 9	70	38	0.00
December 10	69	33	0.00
December 11	76	29	0.00
December 12	57	35	0.00
December 13	55	33	0.00
December 14	55	31	0.00
December 15	52	40	0.11
December 16	52	44	0.25
December 17	65	48	0.81
December 18	65	55	1.36
December 19	62	44	0.00
December 20	63	52	0.06
December 21	61	53	2.05
December 22	58	46	0.13
December 23	62	50	1.35
December 24	61	49	0.86
December 25	55	47	1.65
December 26	58	50	1.02
December 27	60	49	0.97
December 28	57	50	0.24
December 29	58	50	0.00
December 30	62	44	0.04
December 31	54	32	0.00

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Weather Station Details

Years	Station	Coordinates
1999–2024	Napa County Airport	location
1901–1998	Napa State Hospital	location