Janesville Weather in 1978

Historical record of Janesville, Wisconsin weather for the year 1978 based on NOAA data.

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1978 Janesville Weather Extremes
Highest temperature	99 °F	September 8
Lowest temperature	-11 °F	January 11
Highest daily low	74 °F	June 27
Lowest daily high	3 °F	January 9
Most daily precipitation	2.4 inches	June 17
Most daily snow	6.0 inches	January 1
Total annual precipitation	38.1 inches	-
Total annual snow	46.0 inches	-

What was the hottest temperature in Janesville in 1978?

The highest temperature recorded in Janesville, Wisconsin in 1978 was 99 °F which happened on September 8.

Highest Temperatures: All-Time By Year

Highest Temperatures in Janesville in 1978

Rank	Temperature	Date
1	99 °F	Sep 8
2	95 °F	Sep 9
2	95 °F	May 27
4	94 °F	Sep 10
4	94 °F	Sep 7
6	93 °F	Aug 24
6	93 °F	May 26
8	92 °F	Aug 15
8	92 °F	Jun 29
8	92 °F	Jun 26
8	92 °F	Jun 11

What was the coldest temperature in Janesville in 1978?

The lowest temperature recorded in Janesville, Wisconsin in 1978 was -11 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Janesville in 1978

Rank	Temperature	Date
1	-11 °F	January 11
1	-11 °F	January 10
3	-10 °F	February 19
4	-9 °F	December 10
4	-9 °F	January 30
4	-9 °F	January 9
7	-8 °F	January 2
8	-6 °F	February 22
8	-6 °F	January 22
10	-5 °F	February 4

January 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	29	9	0.58	6.0
January 2	15	-8	0.00	0.0
January 3	13	-4	0.00	0.0
January 4	31	-1	0.00	0.0
January 5	35	14	0.00	0.0
January 6	36	21	0.00	0.0
January 7	36	30	0.01	0.0
January 8	35	-2	0.00	0.0
January 9	3	-9	0.00	0.0
January 10	7	-11	0.00	0.0
January 11	15	-11	0.00	0.0
January 12	19	-3	0.04	0.4
January 13	25	8	0.09	1.0
January 14	25	8	0.02	0.2
January 15	23	-3	0.00	0.0
January 16	13	0	0.00	0.0
January 17	24	-1	0.00	0.0
January 18	28	0	0.00	0.0
January 19	23	10	0.00	0.0
January 20	21	13	0.03	0.5
January 21	23	3	0.00	0.0
January 22	21	-6	0.00	0.0
January 23	33	12	0.00	0.0
January 24	33	19	0.05	0.5
January 25	27	0	0.00	0.0
January 26	23	-4	0.04	4.0
January 27	13	3	0.00	0.0
January 28	18	3	0.00	0.0
January 29	14	-3	0.00	0.0
January 30	14	-9	0.00	0.0
January 31	18	-3	0.00	0.0

February 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	16	0	0.15	1.7
February 2	16	-1	0.00	0.0
February 3	20	-4	0.07	0.5
February 4	20	-5	0.08	0.5
February 5	20	6	0.01	0.2
February 6	12	-1	0.00	0.0
February 7	20	5	0.00	0.0
February 8	29	8	0.00	0.0
February 9	28	16	0.00	0.0
February 10	30	11	0.00	0.0
February 11	32	-3	0.00	0.0
February 12	34	14	0.00	0.0
February 13	29	12	0.00	0.0
February 14	30	4	0.00	0.0
February 15	25	9	0.00	0.0
February 16	22	-1	0.00	0.0
February 17	22	-3	0.00	0.0
February 18	32	-3	0.00	0.0
February 19	23	-10	0.00	0.0
February 20	26	6	0.00	0.0
February 21	24	0	0.00	0.0
February 22	25	-6	0.00	0.0
February 23	33	15	0.03	0.3
February 24	35	22	0.00	0.0
February 25	36	23	0.00	0.0
February 26	30	11	0.00	0.0
February 27	26	4	0.00	0.0
February 28	27	n/a	0.01	0.0

March 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	25	5	0.00	0.0
March 2	26	2	0.00	0.0
March 3	27	13	0.09	1.0
March 4	23	7	0.00	0.0
March 5	22	-3	0.00	0.0
March 6	32	16	0.00	0.0
March 7	33	13	0.00	0.0
March 8	34	12	0.00	0.0
March 9	40	1	0.00	0.0
March 10	47	11	0.00	0.0
March 11	39	31	0.41	4.0
March 12	37	22	0.00	0.0
March 13	36	29	0.00	0.0
March 14	40	31	0.05	3.5
March 15	41	29	0.00	0.0
March 16	38	19	0.00	0.0
March 17	37	15	0.00	0.0
March 18	38	13	0.00	0.0
March 19	50	29	0.00	0.0
March 20	48	31	0.00	0.0
March 21	48	34	0.00	0.0
March 22	54	35	0.00	0.0
March 23	49	27	0.00	0.0
March 24	40	25	0.00	0.0
March 25	32	25	0.09	1.0
March 26	36	29	0.07	0.7
March 27	50	26	0.00	0.0
March 28	55	35	0.00	0.0
March 29	51	32	0.00	0.0
March 30	58	32	0.00	0.0
March 31	79	37	0.00	0.0

April 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	72	42	0.00
April 2	50	30	0.31
April 3	65	32	0.24
April 4	56	44	0.00
April 5	56	32	0.00
April 6	55	43	0.97
April 7	70	40	0.00
April 8	55	35	0.08
April 9	59	37	0.01
April 10	58	44	0.57
April 11	55	38	0.01
April 12	73	34	0.00
April 13	63	34	0.00
April 14	59	34	0.00
April 15	57	31	0.00
April 16	52	29	0.00
April 17	55	29	0.00
April 18	55	n/a	0.41
April 19	48	40	0.03
April 20	44	36	0.14
April 21	52	31	0.05
April 22	58	28	0.00
April 23	64	41	0.41
April 24	64	42	0.34
April 25	60	39	0.04
April 26	66	37	0.00
April 27	71	37	0.00
April 28	75	40	0.00
April 29	73	48	0.00
April 30	55	34	0.00

May 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	55	28	0.00
May 2	60	33	0.00
May 3	66	35	0.00
May 4	62	43	0.00
May 5	51	39	0.01
May 6	67	35	0.00
May 7	63	45	0.13
May 8	69	46	0.50
May 9	64	45	0.04
May 10	78	40	0.00
May 11	74	59	0.00
May 12	79	59	0.64
May 13	74	42	2.10
May 14	48	42	0.12
May 15	61	46	0.01
May 16	60	50	0.00
May 17	73	44	0.00
May 18	81	49	0.00
May 19	80	53	0.00
May 20	77	64	0.00
May 21	70	44	0.00
May 22	73	42	0.00
May 23	71	55	0.06
May 24	79	56	0.00
May 25	87	55	0.00
May 26	93	66	0.00
May 27	95	67	0.00
May 28	91	65	0.00
May 29	89	67	0.09
May 30	84	64	0.00
May 31	91	56	0.00

June 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	87	64	0.03
June 2	78	54	0.00
June 3	77	46	0.00
June 4	82	49	0.00
June 5	82	50	0.00
June 6	87	59	0.00
June 7	n/a	n/a	0.00
June 8	87	48	0.79
June 9	83	46	0.00
June 10	87	46	0.00
June 11	92	62	0.00
June 12	91	64	0.49
June 13	74	43	0.00
June 14	69	50	0.00
June 15	82	58	0.00
June 16	81	59	2.01
June 17	79	64	2.40
June 18	80	62	0.00
June 19	82	53	0.00
June 20	80	60	0.01
June 21	76	52	0.00
June 22	82	52	0.00
June 23	78	59	0.00
June 24	89	60	0.00
June 25	n/a	n/a	2.02
June 26	92	65	0.03
June 27	87	74	0.00
June 28	88	63	0.00
June 29	92	68	0.00
June 30	88	68	2.16

July 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	81	65	1.52
July 2	80	65	0.99
July 3	77	61	0.00
July 4	83	59	0.00
July 5	86	60	0.00
July 6	n/a	71	0.00
July 7	n/a	69	0.20
July 8	n/a	62	0.00
July 9	n/a	63	0.05
July 10	n/a	52	0.00
July 11	79	52	0.00
July 12	76	55	0.33
July 13	85	64	0.17
July 14	83	59	0.00
July 15	89	65	0.00
July 16	87	61	0.00
July 17	88	64	0.00
July 18	86	73	0.00
July 19	90	72	0.00
July 20	89	68	1.24
July 21	81	62	1.07
July 22	87	69	0.04
July 23	84	60	0.00
July 24	83	57	0.00
July 25	85	59	0.01
July 26	83	65	0.68
July 27	81	61	0.00
July 28	79	57	0.02
July 29	80	69	0.02
July 30	73	53	0.02
July 31	81	53	0.00

August 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	84	52	0.00
August 2	82	67	0.10
August 3	81	54	0.00
August 4	78	45	0.00
August 5	80	48	0.00
August 6	87	53	0.00
August 7	88	53	0.00
August 8	90	58	0.00
August 9	87	66	0.04
August 10	84	55	0.00
August 11	84	58	0.00
August 12	88	59	0.00
August 13	90	60	0.00
August 14	90	63	0.00
August 15	92	68	0.00
August 16	85	57	0.00
August 17	86	62	0.00
August 18	89	69	0.48
August 19	85	63	2.22
August 20	82	52	0.00
August 21	79	53	0.00
August 22	89	62	0.00
August 23	90	64	0.00
August 24	93	67	0.00
August 25	86	61	0.00
August 26	82	66	0.00
August 27	79	68	0.45
August 28	83	68	0.01
August 29	86	59	0.02
August 30	85	54	0.00
August 31	85	54	0.00

September 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	85	54	0.00
September 2	88	58	0.00
September 3	84	65	0.00
September 4	85	49	0.00
September 5	88	52	0.00
September 6	90	57	0.00
September 7	94	59	0.00
September 8	99	64	0.00
September 9	95	61	0.00
September 10	94	60	0.00
September 11	90	60	0.00
September 12	80	55	0.35
September 13	69	60	0.77
September 14	77	65	0.29
September 15	83	52	0.00
September 16	81	n/a	0.00
September 17	70	57	0.21
September 18	83	58	1.25
September 19	90	64	0.00
September 20	87	62	0.13
September 21	66	51	0.06
September 22	69	45	0.00
September 23	74	40	0.00
September 24	80	47	0.00
September 25	74	49	0.00
September 26	77	46	0.00
September 27	73	55	0.00
September 28	70	38	0.00
September 29	75	46	0.00
September 30	69	53	0.00

October 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	73	41	0.00
October 2	73	43	0.00
October 3	65	52	0.31
October 4	59	45	0.00
October 5	57	50	0.39
October 6	52	47	0.00
October 7	51	39	0.00
October 8	60	30	0.00
October 9	66	43	0.15
October 10	63	54	0.00
October 11	66	50	0.00
October 12	58	45	0.00
October 13	59	35	0.00
October 14	52	35	0.00
October 15	53	34	0.06
October 16	53	37	0.00
October 17	57	29	0.00
October 18	58	40	0.00
October 19	64	33	0.00
October 20	75	34	0.00
October 21	81	52	0.00
October 22	74	52	0.03
October 23	53	40	0.09
October 24	58	33	0.00
October 25	56	44	0.19
October 26	55	35	0.00
October 27	62	34	0.00
October 28	57	34	0.00
October 29	58	34	0.00
October 30	71	42	0.00
October 31	57	41	0.00

November 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
November 1	61	27	0.00	0.0
November 2	72	36	0.00	0.0
November 3	75	38	0.00	0.0
November 4	70	45	0.00	0.0
November 5	71	43	0.07	0.0
November 6	52	42	0.00	0.0
November 7	54	25	0.00	0.0
November 8	58	33	0.00	0.0
November 9	64	40	0.00	0.0
November 10	63	40	0.00	0.0
November 11	53	38	0.00	0.0
November 12	42	35	0.02	0.0
November 13	60	39	0.60	0.0
November 14	52	27	0.00	0.0
November 15	42	22	0.00	0.0
November 16	40	25	0.00	0.0
November 17	48	34	1.50	0.0
November 18	47	33	0.00	0.0
November 19	41	23	0.00	0.0
November 20	27	22	0.02	0.2
November 21	27	20	0.00	0.0
November 22	30	24	0.00	0.0
November 23	37	26	0.35	0.0
November 24	37	26	0.00	0.0
November 25	35	18	0.00	0.0
November 26	35	26	0.00	0.0
November 27	34	30	0.25	2.5
November 28	31	11	0.03	0.5
November 29	37	15	0.02	0.3
November 30	31	7	0.00	0.0

December 1978 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	27	16	0.09	0.9
December 2	23	11	0.00	0.0
December 3	34	21	0.62	2.0
December 4	28	7	0.00	0.0
December 5	33	26	0.01	0.5
December 6	32	13	0.00	0.0
December 7	18	8	0.15	1.3
December 8	18	7	0.00	0.0
December 9	14	-2	0.00	0.0
December 10	10	-9	0.00	0.0
December 11	31	4	0.00	0.0
December 12	38	27	0.00	0.0
December 13	36	20	0.00	0.0
December 14	36	15	0.00	0.0
December 15	42	25	0.00	0.0
December 16	39	21	0.01	0.2
December 17	37	16	0.00	0.0
December 18	42	21	0.00	0.0
December 19	34	27	0.00	0.0
December 20	33	29	0.05	0.0
December 21	31	11	0.00	0.0
December 22	35	19	0.00	0.0
December 23	38	20	0.00	0.0
December 24	37	25	0.11	0.5
December 25	25	9	0.00	0.0
December 26	22	3	0.09	1.0
December 27	17	0	0.00	0.0
December 28	27	10	0.00	0.0
December 29	34	24	0.26	2.6
December 30	34	14	0.20	2.0
December 31	19	11	0.55	5.5

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Weather Station Details

Years	Station	Coordinates
1987–2024	Afton-Janesville WWTP	location
1893–1987	Janesville	location