Janesville Weather in 2018

Historical record of Janesville, Wisconsin weather for the year 2018 based on NOAA data.

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2018 Janesville Weather Extremes
Highest temperature	96 °F	May 28
Lowest temperature	-19 °F	February 6
Highest daily low	76 °F	June 18
Lowest daily high	2 °F	January 2
Most daily precipitation	2.9 inches	August 17
Most daily snow	5.0 inches	February 9
Total annual precipitation	46.8 inches	-
Total annual snow	43.1 inches	-

What was the hottest temperature in Janesville in 2018?

The highest temperature recorded in Janesville, Wisconsin in 2018 was 96 °F which happened on May 28.

Highest Temperatures: All-Time By Year

Highest Temperatures in Janesville in 2018

Rank	Temperature	Date
1	96 °F	May 28
2	94 °F	May 29
3	93 °F	Jul 1
4	92 °F	Jul 14
4	92 °F	Jul 5
4	92 °F	Jun 30
4	92 °F	Jun 18
4	92 °F	May 30
9	91 °F	Sep 18
9	91 °F	Jun 19
9	91 °F	Jun 17
9	91 °F	May 27

What was the coldest temperature in Janesville in 2018?

The lowest temperature recorded in Janesville, Wisconsin in 2018 was -19 °F which happened on Feb 6.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Janesville in 2018

Rank	Temperature	Date
1	-19 °F	February 6
2	-15 °F	January 2
3	-14 °F	January 1
4	-13 °F	January 7
5	-12 °F	January 6
5	-12 °F	January 3
7	-10 °F	January 5
7	-10 °F	January 4
9	-9 °F	February 5
10	-6 °F	February 12

January 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	8	-14	0.00	0.0
January 2	2	-15	0.00	0.0
January 3	13	-12	0.02	0.6
January 4	14	-10	0.00	0.0
January 5	10	-10	0.00	0.0
January 6	9	-12	0.00	0.0
January 7	15	-13	0.00	0.0
January 8	32	14	0.00	0.0
January 9	40	21	0.00	0.0
January 10	40	23	0.01	0.0
January 11	52	35	0.03	0.0
January 12	52	14	0.22	0.0
January 13	20	-1	0.00	0.0
January 14	13	-2	0.00	0.0
January 15	18	-2	0.20	4.0
January 16	21	10	0.06	1.2
January 17	22	-3	0.00	0.0
January 18	18	-2	0.00	0.0
January 19	31	15	0.00	0.0
January 20	40	24	0.00	0.0
January 21	46	26	0.00	0.0
January 22	38	32	0.60	0.0
January 23	43	28	0.99	3.0
January 24	29	24	0.00	0.0
January 25	28	20	0.00	0.0
January 26	38	22	0.00	0.0
January 27	48	34	0.00	0.0
January 28	45	25	0.02	0.0
January 29	29	21	0.00	0.0
January 30	22	7	0.00	0.0
January 31	31	0	0.00	0.0

February 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	40	15	0.00	0.0
February 2	15	1	0.00	0.0
February 3	22	1	0.00	0.0
February 4	38	-1	0.25	3.0
February 5	14	-9	0.02	1.0
February 6	10	-19	0.20	2.0
February 7	14	-1	0.06	1.2
February 8	16	-2	0.01	0.5
February 9	19	5	0.33	5.0
February 10	19	5	0.06	1.5
February 11	18	8	0.20	4.0
February 12	21	-6	0.01	0.5
February 13	19	-5	0.00	0.0
February 14	34	9	0.00	0.0
February 15	43	20	0.00	0.0
February 16	45	30	0.00	0.0
February 17	31	13	0.00	0.0
February 18	32	13	0.04	0.8
February 19	39	16	0.00	0.0
February 20	42	34	1.32	0.0
February 21	41	22	1.04	0.0
February 22	27	22	0.00	0.0
February 23	37	25	0.08	0.0
February 24	38	27	0.00	0.0
February 25	40	28	0.30	0.0
February 26	42	25	0.00	0.0
February 27	51	25	0.00	0.0
February 28	60	31	0.00	0.0

March 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	56	32	0.00	0.0
March 2	45	24	0.00	0.0
March 3	47	24	0.00	0.0
March 4	47	27	0.00	0.0
March 5	47	29	0.00	0.0
March 6	36	30	0.24	2.5
March 7	37	19	0.05	0.0
March 8	31	17	0.00	0.0
March 9	33	17	0.00	0.0
March 10	38	18	0.00	0.0
March 11	42	20	0.00	0.0
March 12	45	25	0.00	0.0
March 13	45	26	0.00	0.0
March 14	36	21	0.00	0.0
March 15	48	23	0.00	0.0
March 16	47	22	0.00	0.0
March 17	38	22	0.00	0.0
March 18	50	24	0.00	0.0
March 19	58	24	0.00	0.0
March 20	49	27	0.00	0.0
March 21	38	24	0.00	0.0
March 22	42	19	0.00	0.0
March 23	49	19	0.00	0.0
March 24	46	21	0.00	0.0
March 25	37	24	0.00	0.0
March 26	43	24	0.00	0.0
March 27	50	25	0.39	0.0
March 28	46	29	0.00	0.0
March 29	55	29	0.00	0.0
March 30	51	30	0.00	0.0
March 31	47	30	0.04	0.0

April 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	49	19	0.06	0.0
April 2	33	18	0.00	0.0
April 3	40	18	0.01	0.0
April 4	34	22	0.15	2.5
April 5	33	20	0.00	0.0
April 6	41	22	0.00	0.0
April 7	33	16	0.00	0.0
April 8	38	15	0.00	0.0
April 9	40	17	0.01	0.1
April 10	38	23	0.00	0.0
April 11	44	23	0.00	0.0
April 12	62	36	0.18	0.0
April 13	65	38	0.00	0.0
April 14	42	35	0.20	0.0
April 15	37	30	0.50	1.0
April 16	32	25	0.15	1.5
April 17	34	25	0.00	0.0
April 18	40	25	0.00	0.0
April 19	34	27	0.33	3.0
April 20	52	25	0.00	0.0
April 21	63	26	0.00	0.0
April 22	56	36	0.00	0.0
April 23	63	37	0.00	0.0
April 24	68	40	0.00	0.0
April 25	72	42	0.00	0.0
April 26	61	33	0.00	0.0
April 27	68	34	0.00	0.0
April 28	60	36	0.00	0.0
April 29	55	27	0.00	0.0
April 30	64	27	0.00	0.0

May 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	81	43	0.00
May 2	82	60	0.00
May 3	82	59	0.76
May 4	69	54	0.45
May 5	75	48	0.01
May 6	81	50	0.06
May 7	73	45	0.00
May 8	78	50	0.00
May 9	81	56	0.13
May 10	77	56	0.66
May 11	70	39	0.15
May 12	43	39	0.22
May 13	53	42	0.45
May 14	60	46	0.36
May 15	76	56	0.20
May 16	76	45	0.00
May 17	82	50	0.00
May 18	77	51	0.00
May 19	76	51	0.14
May 20	73	48	0.01
May 21	59	46	0.35
May 22	61	49	0.46
May 23	70	51	0.00
May 24	81	54	0.00
May 25	87	59	0.00
May 26	88	62	0.00
May 27	91	62	0.00
May 28	96	65	0.00
May 29	94	66	0.00
May 30	92	69	0.01
May 31	80	66	1.02

June 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	86	65	0.00
June 2	80	52	0.00
June 3	71	55	0.22
June 4	69	49	0.00
June 5	80	56	0.06
June 6	75	50	0.00
June 7	79	55	0.01
June 8	85	57	0.00
June 9	76	60	0.31
June 10	80	61	0.92
June 11	65	60	0.30
June 12	70	61	0.05
June 13	79	65	0.00
June 14	81	58	0.00
June 15	81	58	0.00
June 16	86	62	0.70
June 17	91	70	0.00
June 18	92	76	0.00
June 19	91	63	0.85
June 20	71	62	0.50
June 21	73	62	0.01
June 22	65	58	0.62
June 23	71	57	0.02
June 24	80	59	0.00
June 25	84	58	0.00
June 26	78	60	0.01
June 27	77	65	0.60
June 28	80	62	0.00
June 29	86	66	0.00
June 30	92	73	0.00

July 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	93	70	0.54
July 2	89	61	0.22
July 3	85	59	0.00
July 4	89	64	0.00
July 5	92	69	0.10
July 6	88	64	0.00
July 7	78	52	0.00
July 8	82	55	0.00
July 9	85	59	0.00
July 10	89	65	0.00
July 11	87	61	0.00
July 12	87	62	0.00
July 13	87	67	0.00
July 14	92	70	0.66
July 15	84	69	0.08
July 16	86	69	0.00
July 17	86	62	0.00
July 18	81	57	0.00
July 19	81	58	0.00
July 20	81	63	1.40
July 21	74	68	0.42
July 22	79	66	0.15
July 23	78	60	0.01
July 24	82	63	0.00
July 25	85	60	0.00
July 26	84	63	0.00
July 27	76	56	0.00
July 28	76	53	0.00
July 29	78	56	0.00
July 30	80	58	0.00
July 31	82	56	0.00

August 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	80	57	0.00
August 2	85	59	0.50
August 3	79	61	0.01
August 4	84	62	0.00
August 5	88	70	0.00
August 6	88	66	0.79
August 7	81	64	0.08
August 8	76	63	0.05
August 9	81	66	0.00
August 10	88	62	0.90
August 11	84	62	0.00
August 12	86	63	0.00
August 13	88	62	0.00
August 14	88	63	0.00
August 15	87	64	0.00
August 16	84	68	0.04
August 17	84	66	2.87
August 18	82	64	0.07
August 19	82	64	0.00
August 20	83	65	0.00
August 21	75	62	1.16
August 22	77	54	0.07
August 23	77	53	0.00
August 24	78	54	0.00
August 25	68	62	0.13
August 26	85	64	0.00
August 27	90	64	0.07
August 28	86	71	0.00
August 29	84	63	1.27
August 30	72	53	0.04
August 31	75	54	0.00

September 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	84	56	0.03
September 2	81	67	1.09
September 3	87	67	0.88
September 4	77	69	1.10
September 5	90	70	0.00
September 6	82	62	0.91
September 7	72	56	0.01
September 8	70	56	0.00
September 9	71	54	0.00
September 10	71	49	0.00
September 11	75	49	0.00
September 12	81	50	0.00
September 13	83	53	0.00
September 14	82	55	0.00
September 15	87	57	0.00
September 16	88	59	0.00
September 17	89	60	0.00
September 18	91	63	0.01
September 19	69	58	0.29
September 20	76	60	2.50
September 21	89	65	0.07
September 22	68	45	0.00
September 23	69	44	0.00
September 24	74	45	0.00
September 25	79	52	0.00
September 26	80	46	0.20
September 27	65	42	0.00
September 28	69	43	0.00
September 29	55	36	0.00
September 30	53	36	0.50

October 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	56	48	1.25
October 2	59	51	1.00
October 3	61	52	0.01
October 4	85	46	0.16
October 5	57	45	0.15
October 6	59	51	1.14
October 7	57	51	0.22
October 8	61	51	0.19
October 9	83	61	0.00
October 10	84	67	0.30
October 11	70	39	0.29
October 12	48	35	0.00
October 13	41	29	0.00
October 14	51	30	0.00
October 15	50	34	0.07
October 16	46	32	0.00
October 17	58	33	0.00
October 18	51	28	0.00
October 19	60	28	0.00
October 20	55	42	0.05
October 21	48	23	0.00
October 22	51	24	0.00
October 23	65	29	0.01
October 24	53	29	0.00
October 25	55	29	0.00
October 26	52	35	0.00
October 27	52	42	0.00
October 28	51	41	0.08
October 29	49	35	0.03
October 30	54	37	0.00
October 31	62	42	0.45

November 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
November 1	58	40	0.00	0.0
November 2	50	33	0.00	0.0
November 3	48	34	0.00	0.0
November 4	48	33	0.06	0.0
November 5	51	41	0.32	0.0
November 6	50	41	0.50	0.0
November 7	48	33	0.02	0.0
November 8	37	31	0.00	0.0
November 9	39	28	0.13	2.0
November 10	32	17	0.00	0.0
November 11	30	18	0.00	0.0
November 12	41	28	0.00	0.0
November 13	29	17	0.00	0.0
November 14	28	14	0.00	0.0
November 15	35	15	0.00	0.0
November 16	39	18	0.00	0.0
November 17	39	29	0.11	1.1
November 18	32	20	0.00	0.0
November 19	32	20	0.00	0.0
November 20	34	22	0.00	0.0
November 21	34	22	0.00	0.0
November 22	30	26	0.00	0.0
November 23	39	30	0.00	0.0
November 24	49	34	0.10	0.0
November 25	43	34	0.00	0.0
November 26	35	26	0.01	0.0
November 27	26	19	0.00	0.0
November 28	26	18	0.00	0.0
November 29	28	19	0.05	0.5
November 30	32	23	0.00	0.0

December 2018 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	35	24	0.00	0.0
December 2	38	35	0.61	0.0
December 3	37	30	0.24	0.1
December 4	31	27	0.00	0.0
December 5	29	23	0.00	0.0
December 6	32	23	0.00	0.0
December 7	28	12	0.00	0.0
December 8	24	14	0.00	0.0
December 9	28	11	0.00	0.0
December 10	24	11	0.00	0.0
December 11	34	12	0.00	0.0
December 12	35	17	0.00	0.0
December 13	36	18	0.00	0.0
December 14	42	18	0.00	0.0
December 15	34	19	0.00	0.0
December 16	46	21	0.00	0.0
December 17	49	23	0.00	0.0
December 18	41	19	0.00	0.0
December 19	45	20	0.00	0.0
December 20	45	34	0.16	0.0
December 21	41	31	0.02	0.0
December 22	32	26	0.00	0.0
December 23	31	26	0.00	0.0
December 24	37	19	0.00	0.0
December 25	32	20	0.00	0.0
December 26	38	23	0.00	0.0
December 27	42	23	0.20	0.0
December 28	50	34	0.57	0.0
December 29	34	22	0.05	0.5
December 30	26	19	0.00	0.0
December 31	34	18	0.00	0.0

Next Year >

Weather Station Details

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