Helena Weather in 1940

Historical record of Helena, Montana weather for the year 1940 based on NOAA data.

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1940 Helena Weather Extremes
Highest temperature	103 °F	August 12
Lowest temperature	-20 °F	January 21
Highest daily low	68 °F	August 13
Lowest daily high	-3 °F	January 19
Most daily precipitation	0.7 inches	September 28
Most daily snow	4.9 inches	November 21
Total annual precipitation	10.2 inches	-

What was the hottest temperature in Helena in 1940?

The highest temperature recorded in Helena, Montana in 1940 was 103 °F which happened on August 12.

Highest Temperatures: All-Time By Year

Highest Temperatures in Helena in 1940

Rank	Temperature	Date
1	103 °F	Aug 12
2	102 °F	Aug 9
3	97 °F	Jul 23
4	96 °F	Aug 13
5	95 °F	Aug 11
5	95 °F	Aug 8
5	95 °F	Jul 12
8	94 °F	Aug 31
8	94 °F	Aug 30
8	94 °F	Aug 19
8	94 °F	Aug 10
8	94 °F	Jul 22
8	94 °F	Jul 11

What was the coldest temperature in Helena in 1940?

The lowest temperature recorded in Helena, Montana in 1940 was -20 °F which happened on Jan 21.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Helena in 1940

Rank	Temperature	Date
1	-20 °F	January 21
2	-18 °F	January 19
3	-16 °F	January 18
4	-15 °F	January 22
5	-14 °F	January 24
6	-13 °F	November 12
6	-13 °F	January 20
8	-10 °F	November 13
8	-10 °F	January 26
8	-10 °F	January 25

January 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	35	24	0.00	n/a
January 2	42	25	0.00	n/a
January 3	30	21	0.00	n/a
January 4	28	20	0.05	n/a
January 5	27	17	0.01	n/a
January 6	34	17	0.04	n/a
January 7	22	5	0.00	n/a
January 8	21	2	0.08	n/a
January 9	27	6	0.00	n/a
January 10	42	8	0.02	n/a
January 11	25	1	0.00	n/a
January 12	26	6	0.03	n/a
January 13	28	19	0.00	n/a
January 14	36	26	0.00	n/a
January 15	41	18	0.00	n/a
January 16	40	33	0.00	n/a
January 17	39	-4	0.00	n/a
January 18	3	-16	0.00	n/a
January 19	-3	-18	0.00	n/a
January 20	1	-13	0.00	n/a
January 21	0	-20	0.00	n/a
January 22	4	-15	0.00	n/a
January 23	8	-6	0.00	n/a
January 24	2	-14	0.00	n/a
January 25	4	-10	0.04	n/a
January 26	10	-10	0.08	n/a
January 27	47	3	0.00	n/a
January 28	42	20	0.00	n/a
January 29	30	10	0.00	n/a
January 30	24	5	0.00	n/a
January 31	21	3	0.00	n/a

February 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	22	7	0.01	n/a
February 2	25	4	0.00	n/a
February 3	22	0	0.00	n/a
February 4	39	13	0.00	n/a
February 5	44	26	0.00	n/a
February 6	38	30	0.00	n/a
February 7	40	24	0.07	n/a
February 8	42	18	0.00	n/a
February 9	42	35	0.00	n/a
February 10	44	30	0.00	n/a
February 11	40	22	0.00	n/a
February 12	39	18	0.03	n/a
February 13	32	13	0.00	n/a
February 14	37	23	0.00	n/a
February 15	37	24	0.00	n/a
February 16	32	17	0.00	n/a
February 17	38	18	0.00	n/a
February 18	33	17	0.00	n/a
February 19	25	13	0.08	n/a
February 20	35	10	0.00	n/a
February 21	31	14	0.06	n/a
February 22	19	4	0.00	n/a
February 23	13	-7	0.09	n/a
February 24	23	-8	0.00	n/a
February 25	39	5	0.00	n/a
February 26	46	0	0.06	n/a
February 27	45	31	0.00	n/a
February 28	52	29	0.00	n/a
February 29	48	27	0.00	n/a

March 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	51	30	0.00	n/a
March 2	45	30	0.00	n/a
March 3	47	28	0.00	n/a
March 4	53	28	0.00	n/a
March 5	45	35	0.00	n/a
March 6	44	32	0.00	n/a
March 7	49	29	0.00	n/a
March 8	46	26	0.00	n/a
March 9	41	19	0.00	n/a
March 10	31	23	0.00	n/a
March 11	37	22	0.00	n/a
March 12	40	17	0.00	n/a
March 13	46	19	0.00	n/a
March 14	54	27	0.00	n/a
March 15	64	27	0.00	n/a
March 16	56	37	0.00	n/a
March 17	52	33	0.00	n/a
March 18	52	38	0.00	n/a
March 19	55	36	0.00	n/a
March 20	58	36	0.00	n/a
March 21	63	25	0.00	n/a
March 22	63	29	0.00	n/a
March 23	51	19	0.00	n/a
March 24	54	23	0.00	n/a
March 25	44	22	0.55	n/a
March 26	37	22	0.00	n/a
March 27	53	30	0.00	n/a
March 28	54	33	0.00	n/a
March 29	53	34	0.00	n/a
March 30	57	35	0.00	n/a
March 31	48	38	0.60	n/a

April 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	43	34	0.02	n/a
April 2	50	30	0.03	n/a
April 3	43	26	0.00	n/a
April 4	50	30	0.00	n/a
April 5	45	29	0.08	n/a
April 6	54	33	0.00	n/a
April 7	56	27	0.00	n/a
April 8	58	41	0.00	n/a
April 9	52	35	0.34	n/a
April 10	38	16	0.05	n/a
April 11	38	6	0.01	n/a
April 12	62	21	0.00	n/a
April 13	77	34	0.00	n/a
April 14	66	44	0.00	n/a
April 15	48	30	0.01	n/a
April 16	52	24	0.00	n/a
April 17	65	28	0.00	n/a
April 18	68	39	0.00	n/a
April 19	69	31	0.00	n/a
April 20	54	40	0.00	n/a
April 21	48	37	0.00	n/a
April 22	57	35	0.00	n/a
April 23	56	28	0.27	n/a
April 24	54	31	0.00	n/a
April 25	49	31	0.00	n/a
April 26	53	33	0.03	n/a
April 27	55	35	0.02	n/a
April 28	57	36	0.00	n/a
April 29	50	36	0.00	n/a
April 30	56	32	0.00	n/a

May 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	74	41	0.00
May 2	81	42	0.00
May 3	66	43	0.00
May 4	60	34	0.13
May 5	58	37	0.00
May 6	58	38	0.00
May 7	68	32	0.00
May 8	73	34	0.00
May 9	80	45	0.00
May 10	88	43	0.00
May 11	77	49	0.00
May 12	71	41	0.00
May 13	63	43	0.00
May 14	72	34	0.00
May 15	71	43	0.00
May 16	68	42	0.01
May 17	61	40	0.01
May 18	74	34	0.00
May 19	75	50	0.00
May 20	65	42	0.00
May 21	74	36	0.00
May 22	79	39	0.00
May 23	82	42	0.00
May 24	84	50	0.00
May 25	82	50	0.46
May 26	66	47	0.24
May 27	71	42	0.12
May 28	68	46	0.01
May 29	71	50	0.01
May 30	79	47	0.00
May 31	77	49	0.38

June 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	77	51	0.11
June 2	70	48	0.00
June 3	70	48	0.02
June 4	70	44	0.00
June 5	66	50	0.00
June 6	71	41	0.01
June 7	54	42	0.60
June 8	52	40	0.60
June 9	69	45	0.01
June 10	79	44	0.00
June 11	82	50	0.00
June 12	91	50	0.00
June 13	87	59	0.00
June 14	83	55	0.00
June 15	88	47	0.00
June 16	86	51	0.00
June 17	86	51	0.00
June 18	88	51	0.00
June 19	90	57	0.10
June 20	86	55	0.00
June 21	85	50	0.01
June 22	63	43	0.00
June 23	78	36	0.00
June 24	86	45	0.00
June 25	93	50	0.00
June 26	87	55	0.00
June 27	75	55	0.00
June 28	84	43	0.00
June 29	92	46	0.00
June 30	80	66	0.00

July 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	68	56	0.02
July 2	85	56	0.03
July 3	89	52	0.08
July 4	84	56	0.04
July 5	87	57	0.26
July 6	82	50	0.00
July 7	88	48	0.00
July 8	93	55	0.00
July 9	89	60	0.01
July 10	92	52	0.00
July 11	94	59	0.00
July 12	95	62	0.00
July 13	92	63	0.00
July 14	84	60	0.00
July 15	88	59	0.53
July 16	79	61	0.28
July 17	84	54	0.13
July 18	78	49	0.05
July 19	86	58	0.00
July 20	92	52	0.00
July 21	93	53	0.00
July 22	94	58	0.00
July 23	97	60	0.00
July 24	84	62	0.18
July 25	81	50	0.00
July 26	64	52	0.09
July 27	67	53	0.06
July 28	76	44	0.00
July 29	88	51	0.00
July 30	93	57	0.01
July 31	83	56	0.02

August 1940 Helena Weather

Day	High (°F)	Low (°F)
August 1	84	54
August 2	81	53
August 3	87	47
August 4	71	52
August 5	83	42
August 6	92	47
August 7	90	52
August 8	95	54
August 9	102	54
August 10	94	58
August 11	95	54
August 12	103	60
August 13	96	68
August 14	88	53
August 15	84	55
August 16	76	50
August 17	81	51
August 18	88	48
August 19	94	51
August 20	93	54
August 21	86	58
August 22	81	53
August 23	84	51
August 24	79	56
August 25	83	52
August 26	87	48
August 27	84	51
August 28	74	55
August 29	82	45
August 30	94	47
August 31	94	53

September 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	90	59	0.00
September 2	88	55	0.00
September 3	78	52	0.19
September 4	75	47	0.11
September 5	69	43	0.00
September 6	78	40	0.00
September 7	89	46	0.10
September 8	71	57	0.00
September 9	69	50	0.00
September 10	80	44	0.00
September 11	89	48	0.00
September 12	82	51	0.02
September 13	83	50	0.07
September 14	73	50	0.00
September 15	71	41	0.08
September 16	73	50	0.01
September 17	78	45	0.00
September 18	72	52	0.02
September 19	63	51	0.02
September 20	70	50	0.28
September 21	64	50	0.20
September 22	67	45	0.00
September 23	66	45	0.10
September 24	68	48	0.00
September 25	74	41	0.00
September 26	74	42	0.00
September 27	72	41	0.00
September 28	57	50	0.65
September 29	53	46	0.15
September 30	62	37	0.00

October 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	64	40	0.00
October 2	59	45	0.00
October 3	54	45	0.04
October 4	55	46	0.00
October 5	58	37	0.00
October 6	64	28	0.00
October 7	71	32	0.00
October 8	70	32	0.00
October 9	66	41	0.00
October 10	69	42	0.00
October 11	74	47	0.00
October 12	66	48	0.00
October 13	49	35	0.16
October 14	57	29	0.00
October 15	70	37	0.00
October 16	65	37	0.00
October 17	65	39	0.00
October 18	71	43	0.00
October 19	75	37	0.00
October 20	70	37	0.00
October 21	61	38	0.00
October 22	62	30	0.01
October 23	60	39	0.06
October 24	66	37	0.00
October 25	61	49	0.00
October 26	50	38	0.15
October 27	39	36	0.00
October 28	47	35	0.00
October 29	52	31	0.00
October 30	53	28	0.00
October 31	51	33	0.00

November 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
November 1	52	30	0.00	0.0
November 2	52	32	0.01	0.2
November 3	46	30	0.00	0.0
November 4	40	23	0.00	0.2
November 5	42	17	0.00	0.0
November 6	45	27	0.00	0.0
November 7	39	24	0.00	0.0
November 8	33	12	0.00	0.0
November 9	12	-1	0.03	0.8
November 10	9	-8	0.06	1.2
November 11	14	-8	0.00	0.3
November 12	12	-13	0.00	0.0
November 13	16	-10	0.00	0.0
November 14	30	1	0.00	0.0
November 15	37	9	0.00	0.0
November 16	41	10	0.00	0.0
November 17	38	21	0.00	0.0
November 18	36	14	0.01	0.4
November 19	31	2	0.00	0.0
November 20	24	5	0.02	0.0
November 21	25	17	0.18	4.9
November 22	17	-4	0.00	0.0
November 23	15	-4	0.00	0.0
November 24	29	11	0.00	0.0
November 25	43	22	0.00	0.0
November 26	39	17	0.00	0.0
November 27	43	16	0.01	0.3
November 28	43	34	0.01	0.0
November 29	45	33	0.03	0.0
November 30	42	28	0.00	0.0

December 1940 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	36	23	0.00	0.0
December 2	50	32	0.00	0.0
December 3	55	28	0.00	0.0
December 4	44	28	0.00	0.0
December 5	56	26	0.01	0.0
December 6	41	31	0.00	0.0
December 7	52	27	0.00	0.0
December 8	59	31	0.00	0.0
December 9	40	25	0.00	0.0
December 10	32	22	0.03	0.4
December 11	24	6	0.00	0.1
December 12	18	-3	0.00	0.0
December 13	10	-8	0.00	0.0
December 14	12	-9	0.00	0.0
December 15	20	-4	0.00	0.0
December 16	17	-4	0.00	0.0
December 17	19	-5	0.00	0.0
December 18	39	9	0.00	0.0
December 19	48	29	0.00	0.0
December 20	50	30	0.00	0.0
December 21	52	32	0.00	0.0
December 22	47	29	0.00	0.0
December 23	49	29	0.00	0.0
December 24	49	25	0.00	0.0
December 25	45	23	0.00	0.0
December 26	43	25	0.00	0.0
December 27	44	34	0.00	0.0
December 28	40	24	0.00	0.0
December 29	38	17	0.00	0.0
December 30	28	13	0.00	0.0
December 31	36	20	0.00	0.0

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Weather Station Details

Years	Station	Coordinates
1939–2024	Helena Regional Airport	location
1893–1938	Helna	location