Helena Weather in 1966

Historical record of Helena, Montana weather for the year 1966 based on NOAA data.

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1966 Helena Weather Extremes
Highest temperature	100 °F	August 2
Lowest temperature	-10 °F	January 25
Highest daily low	68 °F	July 31
Lowest daily high	8 °F	January 20
Most daily precipitation	0.4 inches	October 2
Most daily snow	4.9 inches	November 6
Total annual precipitation	6.5 inches	-
Total annual snow	30.8 inches	-

What was the hottest temperature in Helena in 1966?

The highest temperature recorded in Helena, Montana in 1966 was 100 °F which happened on August 2.

Highest Temperatures: All-Time By Year

Highest Temperatures in Helena in 1966

Rank	Temperature	Date
1	100 °F	Aug 2
2	99 °F	Jul 15
3	97 °F	Aug 25
3	97 °F	Jul 30
5	96 °F	Aug 16
5	96 °F	Jul 16
7	95 °F	Aug 1
7	95 °F	Jul 17
9	94 °F	Jul 29
9	94 °F	Jul 23
9	94 °F	Jul 19
9	94 °F	Jul 14

What was the coldest temperature in Helena in 1966?

The lowest temperature recorded in Helena, Montana in 1966 was -10 °F which happened 3 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Helena in 1966

Rank	Temperature	Date
1	-10 °F	January 25
1	-10 °F	January 24
1	-10 °F	January 20
4	-7 °F	January 4
5	-5 °F	February 15
6	-4 °F	January 27
6	-4 °F	January 19
6	-4 °F	January 3
9	-3 °F	January 26
9	-3 °F	January 5

January 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	30	8	0.00	0.0
January 2	36	12	0.00	0.0
January 3	32	-4	0.12	2.5
January 4	18	-7	0.10	1.4
January 5	20	-3	0.06	0.8
January 6	49	17	0.06	0.0
January 7	45	31	0.00	0.0
January 8	55	30	0.02	0.2
January 9	36	23	0.00	0.0
January 10	39	22	0.00	0.0
January 11	45	27	0.00	0.0
January 12	42	31	0.00	0.0
January 13	46	31	0.00	0.0
January 14	43	30	0.00	0.0
January 15	36	15	0.04	0.5
January 16	28	9	0.00	0.0
January 17	35	15	0.00	0.0
January 18	33	12	0.00	0.0
January 19	18	-4	0.00	0.0
January 20	8	-10	0.00	0.0
January 21	22	7	0.00	0.0
January 22	24	12	0.03	0.4
January 23	25	2	0.00	0.0
January 24	9	-10	0.03	0.5
January 25	17	-10	0.00	0.0
January 26	21	-3	0.00	0.0
January 27	10	-4	0.00	0.0
January 28	22	4	0.00	0.0
January 29	36	13	0.00	0.0
January 30	30	15	0.00	0.0
January 31	35	18	0.00	0.0

February 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	38	17	0.00	0.0
February 2	35	12	0.00	0.0
February 3	31	6	0.00	0.0
February 4	39	18	0.00	0.0
February 5	43	18	0.00	0.0
February 6	37	17	0.03	0.4
February 7	35	17	0.04	0.6
February 8	35	8	0.00	0.0
February 9	32	8	0.02	0.2
February 10	32	18	0.09	1.8
February 11	38	22	0.00	0.0
February 12	35	19	0.01	0.2
February 13	33	19	0.00	0.0
February 14	26	5	0.10	1.5
February 15	16	-5	0.00	0.1
February 16	38	8	0.00	0.0
February 17	43	17	0.00	0.0
February 18	45	16	0.00	0.0
February 19	40	19	0.00	0.0
February 20	43	20	0.00	0.0
February 21	45	26	0.00	0.0
February 22	41	20	0.00	0.0
February 23	43	17	0.00	0.0
February 24	40	18	0.00	0.0
February 25	38	21	0.00	0.0
February 26	45	21	0.00	0.0
February 27	44	30	0.00	0.0
February 28	40	27	0.04	0.3

March 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	35	20	0.01	0.2
March 2	22	12	0.08	0.7
March 3	19	3	0.02	0.1
March 4	25	-2	0.00	0.0
March 5	32	0	0.00	0.0
March 6	44	13	0.00	0.0
March 7	46	29	0.00	0.0
March 8	56	19	0.00	0.0
March 9	62	42	0.00	0.0
March 10	51	33	0.00	0.0
March 11	52	25	0.00	0.0
March 12	58	27	0.00	0.0
March 13	53	28	0.02	0.0
March 14	60	27	0.00	0.0
March 15	56	28	0.00	0.0
March 16	48	33	0.00	0.0
March 17	41	25	0.00	0.0
March 18	52	15	0.00	0.0
March 19	60	30	0.00	0.0
March 20	44	20	0.01	0.0
March 21	31	18	0.14	1.3
March 22	36	10	0.00	0.0
March 23	47	14	0.00	0.0
March 24	59	21	0.00	0.0
March 25	61	26	0.00	0.0
March 26	68	27	0.00	0.0
March 27	69	26	0.00	0.0
March 28	69	28	0.00	0.0
March 29	69	31	0.00	0.0
March 30	74	29	0.00	0.0
March 31	63	44	0.00	0.0

April 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	75	31	0.00	0.0
April 2	51	32	0.05	0.1
April 3	44	28	0.03	0.0
April 4	52	24	0.00	0.0
April 5	65	24	0.00	0.0
April 6	69	30	0.00	0.0
April 7	53	35	0.03	0.0
April 8	62	37	0.00	0.0
April 9	63	39	0.03	0.0
April 10	60	32	0.00	0.0
April 11	59	33	0.00	0.0
April 12	61	30	0.00	0.0
April 13	58	29	0.00	0.0
April 14	69	25	0.00	0.0
April 15	63	45	0.00	0.0
April 16	50	30	0.10	0.6
April 17	35	27	0.04	0.3
April 18	31	19	0.00	0.0
April 19	36	16	0.00	0.0
April 20	51	18	0.00	0.0
April 21	54	32	0.00	0.0
April 22	58	31	0.00	0.0
April 23	60	41	0.00	0.0
April 24	69	31	0.00	0.0
April 25	70	40	0.00	0.0
April 26	54	28	0.15	0.1
April 27	40	25	0.06	0.7
April 28	39	22	0.02	0.1
April 29	54	20	0.00	0.0
April 30	62	27	0.00	0.0

May 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	71	34	0.00
May 2	77	35	0.00
May 3	84	37	0.00
May 4	87	41	0.00
May 5	86	43	0.00
May 6	90	43	0.00
May 7	75	48	0.00
May 8	72	44	0.00
May 9	77	39	0.00
May 10	66	42	0.27
May 11	48	31	0.00
May 12	52	25	0.00
May 13	58	41	0.00
May 14	55	39	0.04
May 15	62	32	0.00
May 16	58	39	0.00
May 17	59	37	0.00
May 18	64	33	0.00
May 19	70	31	0.00
May 20	80	42	0.00
May 21	80	42	0.00
May 22	52	40	0.00
May 23	65	40	0.00
May 24	79	45	0.00
May 25	84	40	0.00
May 26	88	42	0.00
May 27	86	48	0.01
May 28	82	52	0.10
May 29	84	48	0.01
May 30	89	47	0.00
May 31	71	53	0.00

June 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	71	47	0.00
June 2	61	43	0.22
June 3	57	38	0.09
June 4	58	35	0.00
June 5	63	35	0.01
June 6	71	38	0.00
June 7	72	44	0.00
June 8	72	48	0.00
June 9	74	44	0.07
June 10	69	51	0.04
June 11	62	45	0.00
June 12	63	44	0.00
June 13	72	34	0.00
June 14	76	52	0.00
June 15	71	48	0.00
June 16	79	42	0.00
June 17	82	47	0.03
June 18	82	55	0.00
June 19	80	47	0.00
June 20	78	55	0.00
June 21	76	48	0.04
June 22	70	51	0.06
June 23	67	45	0.14
June 24	58	44	0.02
June 25	72	44	0.00
June 26	84	43	0.00
June 27	90	48	0.00
June 28	93	52	0.00
June 29	83	57	0.02
June 30	74	52	0.22

July 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	82	52	0.00
July 2	88	52	0.11
July 3	73	47	0.10
July 4	79	44	0.00
July 5	85	50	0.00
July 6	88	50	0.00
July 7	88	56	0.00
July 8	91	59	0.00
July 9	89	54	0.00
July 10	84	57	0.08
July 11	85	51	0.00
July 12	83	53	0.00
July 13	78	60	0.00
July 14	94	51	0.00
July 15	99	56	0.00
July 16	96	56	0.00
July 17	95	58	0.00
July 18	92	62	0.00
July 19	94	60	0.03
July 20	87	58	0.00
July 21	85	54	0.00
July 22	90	55	0.00
July 23	94	53	0.00
July 24	84	58	0.00
July 25	87	58	0.00
July 26	87	50	0.00
July 27	88	52	0.00
July 28	89	59	0.00
July 29	94	51	0.00
July 30	97	53	0.00
July 31	92	68	0.00

August 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	95	56	0.00
August 2	100	54	0.00
August 3	93	58	0.00
August 4	87	58	0.10
August 5	87	51	0.00
August 6	79	54	0.00
August 7	76	54	0.00
August 8	84	48	0.00
August 9	86	50	0.00
August 10	91	53	0.00
August 11	81	57	0.00
August 12	81	48	0.00
August 13	84	49	0.00
August 14	83	52	0.00
August 15	92	49	0.00
August 16	96	50	0.00
August 17	86	50	0.00
August 18	85	53	0.00
August 19	66	48	0.00
August 20	58	48	0.11
August 21	71	40	0.00
August 22	77	40	0.00
August 23	83	41	0.00
August 24	92	42	0.00
August 25	97	49	0.00
August 26	88	53	0.11
August 27	72	52	0.00
August 28	81	48	0.01
August 29	86	52	0.03
August 30	75	47	0.06
August 31	75	43	0.00

September 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	79	40	0.00
September 2	78	45	0.00
September 3	84	45	0.00
September 4	89	46	0.00
September 5	90	46	0.00
September 6	90	50	0.00
September 7	89	51	0.01
September 8	88	55	0.00
September 9	89	49	0.00
September 10	91	47	0.00
September 11	85	54	0.04
September 12	70	54	0.04
September 13	69	53	0.00
September 14	69	52	0.07
September 15	59	38	0.06
September 16	75	37	0.00
September 17	82	40	0.00
September 18	91	45	0.00
September 19	73	52	0.00
September 20	86	46	0.00
September 21	90	50	0.00
September 22	89	48	0.00
September 23	90	51	0.00
September 24	67	50	0.00
September 25	66	44	0.00
September 26	67	47	0.00
September 27	68	40	0.00
September 28	75	55	0.00
September 29	67	37	0.12
September 30	62	29	0.00

October 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	78	35	0.00
October 2	61	34	0.40
October 3	56	30	0.00
October 4	63	30	0.00
October 5	75	33	0.00
October 6	79	36	0.00
October 7	72	38	0.00
October 8	65	46	0.00
October 9	64	39	0.00
October 10	70	30	0.00
October 11	71	34	0.00
October 12	52	34	0.28
October 13	37	29	0.02
October 14	48	22	0.00
October 15	51	26	0.00
October 16	55	24	0.00
October 17	54	37	0.00
October 18	53	28	0.00
October 19	72	31	0.00
October 20	64	33	0.00
October 21	43	30	0.00
October 22	47	27	0.00
October 23	59	43	0.00
October 24	68	38	0.00
October 25	68	30	0.00
October 26	71	30	0.00
October 27	59	37	0.05
October 28	47	28	0.00
October 29	59	21	0.00
October 30	61	44	0.00
October 31	50	24	0.00

November 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
November 1	52	17	0.00	0.0
November 2	64	29	0.00	0.0
November 3	54	30	0.00	0.0
November 4	46	30	0.00	0.0
November 5	60	28	0.00	0.0
November 6	43	8	0.36	4.9
November 7	26	4	0.02	0.3
November 8	19	7	0.00	0.0
November 9	41	8	0.00	0.0
November 10	41	6	0.13	1.9
November 11	22	-1	0.00	0.0
November 12	50	17	0.00	0.0
November 13	41	25	0.00	0.0
November 14	62	28	0.00	0.0
November 15	62	39	0.00	0.0
November 16	51	35	0.03	0.0
November 17	44	29	0.00	0.0
November 18	46	21	0.00	0.0
November 19	51	26	0.00	0.0
November 20	64	30	0.01	0.0
November 21	52	28	0.24	0.0
November 22	43	23	0.00	0.0
November 23	42	25	0.00	0.0
November 24	45	35	0.00	0.0
November 25	56	34	0.00	0.0
November 26	41	25	0.00	0.0
November 27	44	23	0.00	0.0
November 28	44	25	0.00	0.0
November 29	39	17	0.05	0.2
November 30	20	10	0.20	2.2

December 1966 Helena Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	18	6	0.21	2.7
December 2	17	-1	0.00	0.0
December 3	38	11	0.00	0.0
December 4	45	9	0.00	0.0
December 5	45	20	0.02	0.0
December 6	34	15	0.00	0.0
December 7	39	11	0.02	0.2
December 8	28	1	0.00	0.0
December 9	21	-1	0.00	0.0
December 10	33	8	0.00	0.0
December 11	40	24	0.00	0.0
December 12	40	18	0.00	0.0
December 13	48	28	0.00	0.0
December 14	47	35	0.00	0.0
December 15	41	23	0.00	0.0
December 16	56	27	0.00	0.0
December 17	44	28	0.00	0.0
December 18	56	33	0.00	0.0
December 19	45	32	0.00	0.0
December 20	52	32	0.02	0.0
December 21	40	32	0.17	0.0
December 22	32	17	0.00	0.0
December 23	28	13	0.00	0.0
December 24	32	15	0.00	0.0
December 25	27	17	0.05	0.8
December 26	30	21	0.05	0.5
December 27	26	4	0.00	0.0
December 28	32	13	0.00	0.0
December 29	33	18	0.07	1.4
December 30	36	15	0.01	0.1
December 31	42	31	0.00	0.0

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Weather Station Details

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