Napa Weather in 1939

Historical record of Napa, California weather for the year 1939 based on NOAA data.

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1939 Napa Weather Extremes
Highest temperature	106 °F	September 23
Lowest temperature	25 °F	January 25
Highest daily low	69 °F	September 22
Lowest daily high	51 °F	February 9
Most daily precipitation	1.2 inches	January 5
Total annual precipitation	10.4 inches	-

What was the hottest temperature in Napa in 1939?

The highest temperature recorded in Napa, California in 1939 was 106 °F which happened on September 23.

Highest Temperatures: All-Time By Year

Highest Temperatures in Napa in 1939

Rank	Temperature	Date
1	106 °F	Sep 23
2	105 °F	Sep 22
2	105 °F	Sep 21
2	105 °F	Sep 20
5	103 °F	Aug 17
6	101 °F	Sep 18
6	101 °F	Jul 8
8	100 °F	Sep 19
8	100 °F	Jul 20
10	99 °F	Sep 17

What was the coldest temperature in Napa in 1939?

The lowest temperature recorded in Napa, California in 1939 was 25 °F which happened on Jan 25.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Napa in 1939

Rank	Temperature	Date
1	25 °F	January 25
2	27 °F	February 9
2	27 °F	February 1
4	28 °F	January 23
5	29 °F	March 4
5	29 °F	February 21
5	29 °F	February 2
5	29 °F	January 31
9	30 °F	March 5
9	30 °F	February 20
9	30 °F	February 11
9	30 °F	February 8
9	30 °F	January 24
9	30 °F	January 17
9	30 °F	January 13
9	30 °F	January 12

January 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	53	31	0.00
January 2	61	40	0.00
January 3	62	47	0.05
January 4	59	41	0.08
January 5	56	44	1.23
January 6	65	38	0.04
January 7	64	33	0.00
January 8	62	32	0.00
January 9	68	48	0.00
January 10	66	32	0.00
January 11	66	32	0.00
January 12	64	30	0.00
January 13	65	30	0.00
January 14	67	33	0.00
January 15	64	36	0.00
January 16	64	31	0.00
January 17	63	30	0.00
January 18	61	33	0.00
January 19	56	39	0.00
January 20	58	40	0.00
January 21	65	40	0.01
January 22	62	35	0.00
January 23	64	28	0.00
January 24	65	30	0.00
January 25	63	25	0.00
January 26	60	36	0.00
January 27	55	43	0.22
January 28	61	33	0.00
January 29	57	43	0.26
January 30	56	38	0.69
January 31	52	29	0.00

February 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	55	27	0.00
February 2	54	29	0.15
February 3	54	40	0.55
February 4	60	33	0.08
February 5	58	32	0.00
February 6	59	46	0.53
February 7	56	36	0.31
February 8	53	30	0.14
February 9	51	27	0.01
February 10	58	38	0.09
February 11	62	30	0.00
February 12	58	36	0.01
February 13	65	35	0.00
February 14	65	35	0.00
February 15	67	35	0.00
February 16	68	43	0.00
February 17	79	51	0.00
February 18	77	38	0.00
February 19	66	44	0.00
February 20	67	30	0.00
February 21	71	29	0.00
February 22	73	34	0.00
February 23	69	32	0.00
February 24	76	40	0.00
February 25	75	32	0.00
February 26	64	38	0.00
February 27	65	31	0.00
February 28	62	33	0.00

March 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	67	34	0.00
March 2	64	36	0.00
March 3	66	32	0.00
March 4	64	29	0.00
March 5	60	30	0.00
March 6	61	42	0.11
March 7	55	33	0.02
March 8	55	44	0.88
March 9	54	41	0.87
March 10	62	34	0.07
March 11	63	34	0.00
March 12	61	47	0.05
March 13	63	48	0.08
March 14	69	32	0.00
March 15	78	36	0.00
March 16	84	42	0.00
March 17	85	45	0.00
March 18	68	48	0.00
March 19	69	43	0.00
March 20	68	47	0.00
March 21	61	48	0.00
March 22	61	46	0.00
March 23	57	46	0.00
March 24	64	46	0.00
March 25	63	47	0.00
March 26	56	47	0.30
March 27	63	34	0.00
March 28	61	36	0.00
March 29	68	47	0.00
March 30	74	37	0.00
March 31	82	40	0.00

April 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	80	45	0.00
April 2	72	52	0.00
April 3	69	41	0.36
April 4	73	43	0.00
April 5	84	40	0.00
April 6	91	55	0.00
April 7	87	46	0.00
April 8	76	43	0.00
April 9	84	42	0.00
April 10	80	40	0.00
April 11	69	38	0.00
April 12	69	41	0.00
April 13	75	40	0.00
April 14	69	38	0.00
April 15	73	43	0.00
April 16	87	41	0.00
April 17	86	46	0.00
April 18	78	45	0.00
April 19	79	44	0.00
April 20	72	45	0.00
April 21	71	46	0.00
April 22	70	47	0.00
April 23	70	47	0.00
April 24	69	42	0.00
April 25	72	38	0.00
April 26	72	38	0.00
April 27	79	37	0.00
April 28	75	41	0.00
April 29	70	45	0.00
April 30	70	34	0.00

May 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	70	47	0.00
May 2	71	40	0.00
May 3	78	36	0.00
May 4	79	42	0.00
May 5	73	42	0.00
May 6	70	41	0.00
May 7	78	41	0.00
May 8	67	46	0.00
May 9	74	49	0.00
May 10	74	55	0.01
May 11	69	49	0.00
May 12	94	50	0.00
May 13	79	47	0.00
May 14	72	49	0.00
May 15	69	53	0.00
May 16	72	51	0.00
May 17	73	40	0.00
May 18	69	39	0.00
May 19	72	36	0.00
May 20	69	45	0.00
May 21	65	48	0.73
May 22	66	50	0.48
May 23	76	42	0.00
May 24	79	44	0.00
May 25	83	46	0.00
May 26	83	47	0.00
May 27	82	54	0.00
May 28	92	50	0.00
May 29	96	56	0.00
May 30	84	51	0.00
May 31	82	46	0.00

June 1939 Napa Weather

Day	High (°F)	Low (°F)
June 1	82	44
June 2	85	47
June 3	79	46
June 4	73	40
June 5	74	41
June 6	84	40
June 7	91	46
June 8	91	52
June 9	90	52
June 10	86	51
June 11	81	49
June 12	77	45
June 13	75	52
June 14	73	50
June 15	67	52
June 16	73	42
June 17	81	45
June 18	86	47
June 19	85	50
June 20	91	50
June 21	97	53
June 22	88	56
June 23	87	50
June 24	74	51
June 25	76	46
June 26	82	46
June 27	81	52
June 28	75	50
June 29	80	47
June 30	82	48

July 1939 Napa Weather

Day	High (°F)	Low (°F)
July 1	75	52
July 2	73	49
July 3	73	51
July 4	77	54
July 5	74	54
July 6	84	46
July 7	87	48
July 8	101	50
July 9	82	53
July 10	79	56
July 11	88	52
July 12	89	51
July 13	83	47
July 14	86	46
July 15	87	51
July 16	86	50
July 17	83	50
July 18	82	48
July 19	86	48
July 20	100	47
July 21	98	52
July 22	91	55
July 23	86	53
July 24	76	52
July 25	82	53
July 26	82	50
July 27	81	51
July 28	79	53
July 29	80	54
July 30	77	51
July 31	81	52

August 1939 Napa Weather

Day	High (°F)	Low (°F)
August 1	85	52
August 2	81	49
August 3	81	52
August 4	80	51
August 5	79	50
August 6	76	51
August 7	75	52
August 8	76	53
August 9	78	51
August 10	80	52
August 11	80	46
August 12	86	49
August 13	93	46
August 14	86	48
August 15	82	48
August 16	85	53
August 17	103	50
August 18	78	53
August 19	79	50
August 20	80	53
August 21	84	53
August 22	79	53
August 23	78	54
August 24	81	51
August 25	83	46
August 26	81	47
August 27	80	46
August 28	87	42
August 29	87	47
August 30	84	45
August 31	80	42

September 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	83	44	0.00
September 2	88	46	0.00
September 3	82	54	0.00
September 4	80	49	0.00
September 5	83	43	0.00
September 6	92	48	0.00
September 7	90	48	0.00
September 8	93	46	0.00
September 9	97	51	0.00
September 10	86	53	0.00
September 11	76	51	0.00
September 12	71	54	0.00
September 13	68	44	0.00
September 14	81	42	0.00
September 15	89	43	0.00
September 16	96	45	0.00
September 17	99	50	0.00
September 18	101	53	0.00
September 19	100	62	0.00
September 20	105	65	0.00
September 21	105	68	0.00
September 22	105	69	0.00
September 23	106	62	0.00
September 24	83	60	0.00
September 25	79	55	0.00
September 26	77	53	0.03
September 27	80	55	0.00
September 28	78	47	0.00
September 29	79	47	0.00
September 30	78	45	0.00

October 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	76	55	0.03
October 2	74	43	0.35
October 3	72	41	0.00
October 4	75	42	0.00
October 5	73	44	0.00
October 6	71	48	0.05
October 7	79	39	0.00
October 8	86	44	0.00
October 9	87	45	0.00
October 10	88	45	0.00
October 11	n/a	n/a	n/a
October 12	n/a	n/a	n/a
October 13	n/a	n/a	n/a
October 14	80	48	0.00
October 15	75	45	0.00
October 16	76	38	0.00
October 17	73	40	0.00
October 18	80	46	0.00
October 19	77	46	0.00
October 20	86	42	0.00
October 21	91	46	0.00
October 22	90	48	0.00
October 23	66	46	0.00
October 24	65	50	0.06
October 25	67	33	0.00
October 26	70	32	0.00
October 27	77	42	0.00
October 28	85	46	0.00
October 29	90	45	0.00
October 30	87	46	0.00
October 31	79	43	0.00

November 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	75	41	0.00
November 2	73	40	0.00
November 3	72	38	0.00
November 4	74	35	0.00
November 5	77	34	0.00
November 6	79	35	0.00
November 7	82	36	0.00
November 8	73	36	0.00
November 9	69	35	0.00
November 10	77	36	0.00
November 11	78	37	0.00
November 12	78	39	0.00
November 13	71	35	0.00
November 14	69	40	0.00
November 15	71	32	0.00
November 16	77	35	0.00
November 17	77	36	0.00
November 18	74	36	0.00
November 19	75	36	0.00
November 20	78	36	0.00
November 21	75	35	0.00
November 22	77	39	0.00
November 23	78	39	0.00
November 24	73	36	0.00
November 25	60	41	0.12
November 26	66	38	0.00
November 27	69	33	0.00
November 28	77	47	0.00
November 29	69	36	0.00
November 30	70	35	0.00

December 1939 Napa Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	71	39	0.00
December 2	70	41	0.00
December 3	72	35	0.00
December 4	71	33	0.00
December 5	69	35	0.00
December 6	63	35	0.00
December 7	60	35	0.00
December 8	62	45	0.05
December 9	63	56	0.01
December 10	67	55	0.69
December 11	63	37	0.02
December 12	65	34	0.00
December 13	64	39	0.00
December 14	62	38	0.00
December 15	66	42	0.00
December 16	66	40	0.00
December 17	67	50	0.00
December 18	68	37	0.00
December 19	60	37	0.01
December 20	66	35	0.00
December 21	65	38	0.00
December 22	58	36	0.00
December 23	70	44	0.05
December 24	62	38	0.00
December 25	58	31	0.00
December 26	64	37	0.00
December 27	56	39	0.00
December 28	56	47	0.00
December 29	63	47	0.24
December 30	59	45	0.25
December 31	58	48	0.00

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Weather Station Details

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