Janesville Weather in 2023

Historical record of Janesville, Wisconsin weather for the year 2023 based on NOAA data.

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2023 Janesville Weather Extremes
Highest temperature	98 °F	August 24
Lowest temperature	-11 °F	February 1
Highest daily low	76 °F	August 24
Lowest daily high	9 °F	February 1
Most daily precipitation	2.0 inches	October 14
Most daily snow	7.0 inches	January 29
Total annual precipitation	29.9 inches	-
Total annual snow	36.3 inches	-

What was the hottest temperature in Janesville in 2023?

The highest temperature recorded in Janesville, Wisconsin in 2023 was 98 °F which happened on August 24.

Highest Temperatures: All-Time By Year

Highest Temperatures in Janesville in 2023

Rank	Temperature	Date
1	98 °F	Aug 24
2	97 °F	Aug 25
3	94 °F	Sep 4
4	93 °F	Sep 5
4	93 °F	Aug 21
6	92 °F	Jul 29
6	92 °F	Jul 28
6	92 °F	Jun 25
9	91 °F	Sep 6
9	91 °F	Jul 5
9	91 °F	Jun 3
9	91 °F	Jun 1

What was the coldest temperature in Janesville in 2023?

The lowest temperature recorded in Janesville, Wisconsin in 2023 was -11 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Janesville in 2023

Rank	Temperature	Date
1	-11 °F	February 1
1	-11 °F	January 31
3	-6 °F	February 4
3	-6 °F	February 3
5	0 °F	February 2
6	6 °F	January 30
7	7 °F	January 27
8	9 °F	March 18
9	10 °F	November 29
9	10 °F	November 28
9	10 °F	March 19
9	10 °F	February 7

January 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	35	21	0.16	0.0
January 2	36	29	0.00	0.0
January 3	38	29	0.19	0.0
January 4	39	35	0.07	0.0
January 5	35	29	0.05	0.5
January 6	33	27	0.01	0.0
January 7	28	19	0.00	0.0
January 8	29	19	0.00	0.0
January 9	26	20	0.00	0.0
January 10	41	20	0.00	0.0
January 11	45	26	0.00	0.0
January 12	47	32	0.00	0.0
January 13	37	28	0.00	0.0
January 14	29	22	0.00	0.0
January 15	31	22	0.00	0.0
January 16	42	27	0.00	0.0
January 17	48	36	0.46	0.0
January 18	37	34	0.00	0.0
January 19	38	33	0.23	0.0
January 20	37	29	0.15	0.0
January 21	30	25	0.00	0.0
January 22	26	23	0.01	0.2
January 23	29	19	0.00	0.0
January 24	29	20	0.00	0.0
January 25	36	28	0.02	0.5
January 26	36	28	0.15	1.5
January 27	29	7	0.03	0.5
January 28	34	14	0.06	0.9
January 29	20	15	0.35	7.0
January 30	19	6	0.00	0.0
January 31	11	-11	0.00	0.0

February 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	9	-11	0.00	0.0
February 2	25	0	0.00	0.0
February 3	30	-6	0.00	0.0
February 4	13	-6	0.00	0.0
February 5	39	13	0.00	0.0
February 6	39	11	0.00	0.0
February 7	45	10	0.00	0.0
February 8	41	21	0.00	0.0
February 9	47	22	0.08	0.0
February 10	36	27	0.77	0.0
February 11	32	19	0.00	0.0
February 12	45	22	0.00	0.0
February 13	50	23	0.00	0.0
February 14	48	26	0.00	0.0
February 15	49	35	0.20	0.0
February 16	40	27	0.01	0.0
February 17	30	12	0.34	5.9
February 18	27	12	0.00	0.0
February 19	40	24	0.00	0.0
February 20	44	23	0.00	0.0
February 21	45	18	0.00	0.0
February 22	32	18	0.00	0.0
February 23	31	29	0.99	2.5
February 24	35	14	0.00	0.0
February 25	25	15	0.02	0.3
February 26	36	21	0.00	0.0
February 27	43	20	1.32	0.0
February 28	39	33	0.19	0.0

March 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	46	33	0.07	0.0
March 2	53	33	0.00	0.0
March 3	37	29	0.00	0.0
March 4	39	24	0.00	0.0
March 5	47	24	0.01	0.0
March 6	49	24	0.27	0.0
March 7	48	32	0.00	0.0
March 8	49	29	0.00	0.0
March 9	45	32	0.00	0.0
March 10	38	30	0.45	5.0
March 11	35	29	0.00	0.0
March 12	35	30	0.13	1.3
March 13	38	26	0.01	0.0
March 14	31	15	0.00	0.0
March 15	34	15	0.00	0.0
March 16	49	28	0.00	0.0
March 17	44	28	0.20	0.0
March 18	31	9	0.00	0.0
March 19	23	10	0.00	0.0
March 20	41	15	0.00	0.0
March 21	48	29	0.00	0.0
March 22	56	29	0.00	0.0
March 23	49	33	0.05	0.0
March 24	45	28	0.00	0.0
March 25	46	30	0.50	5.0
March 26	43	22	0.04	0.4
March 27	40	22	0.10	0.0
March 28	45	25	0.00	0.0
March 29	46	28	0.00	0.0
March 30	37	21	0.00	0.0
March 31	55	25	0.02	0.0

April 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	68	34	0.85	0.0
April 2	43	27	0.01	0.0
April 3	56	28	0.00	0.0
April 4	55	34	0.24	0.0
April 5	69	35	0.11	0.0
April 6	63	28	0.10	0.0
April 7	51	28	0.00	0.0
April 8	55	31	0.00	0.0
April 9	65	33	0.00	0.0
April 10	68	36	0.00	0.0
April 11	72	40	0.00	0.0
April 12	78	43	0.00	0.0
April 13	81	48	0.00	0.0
April 14	82	45	0.00	0.0
April 15	82	47	0.00	0.0
April 16	81	46	0.43	0.0
April 17	47	28	0.55	0.2
April 18	37	28	0.00	0.0
April 19	57	31	0.00	0.0
April 20	54	40	0.09	0.0
April 21	73	38	0.02	0.0
April 22	57	34	0.00	0.0
April 23	44	34	0.02	0.0
April 24	41	29	0.00	0.0
April 25	53	31	0.02	0.0
April 26	48	27	0.00	0.0
April 27	54	30	0.00	0.0
April 28	67	37	0.00	0.0
April 29	68	39	0.01	0.0
April 30	54	37	0.04	0.0

May 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	43	36	0.11
May 2	52	38	0.06
May 3	57	34	0.00
May 4	62	37	0.00
May 5	74	42	0.00
May 6	77	53	0.03
May 7	75	55	0.01
May 8	85	53	0.10
May 9	58	52	0.45
May 10	72	48	0.00
May 11	79	48	0.00
May 12	85	55	0.01
May 13	79	55	0.80
May 14	70	55	0.00
May 15	57	46	0.27
May 16	72	40	0.00
May 17	81	43	0.00
May 18	66	41	0.00
May 19	75	46	0.39
May 20	67	44	0.00
May 21	73	46	0.00
May 22	79	48	0.00
May 23	82	50	0.00
May 24	83	52	0.00
May 25	73	48	0.00
May 26	68	39	0.00
May 27	n/a	44	0.00
May 28	78	49	0.00
May 29	n/a	54	0.00
May 30	n/a	55	0.00
May 31	88	59	0.00

June 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	91	63	0.02
June 2	90	61	0.08
June 3	91	59	0.00
June 4	90	64	0.00
June 5	82	52	0.00
June 6	87	53	0.00
June 7	77	58	0.00
June 8	77	52	0.00
June 9	76	46	0.00
June 10	82	53	0.00
June 11	84	54	0.21
June 12	56	41	0.10
June 13	70	50	0.07
June 14	70	50	0.10
June 15	81	57	0.00
June 16	76	47	0.00
June 17	73	50	0.00
June 18	82	54	0.00
June 19	86	58	0.00
June 20	86	56	0.00
June 21	85	59	0.00
June 22	88	62	0.00
June 23	87	56	0.00
June 24	88	59	0.00
June 25	92	60	0.43
June 26	78	65	0.03
June 27	74	57	0.00
June 28	81	56	0.00
June 29	83	60	0.07
June 30	85	65	0.00

July 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	85	68	0.00
July 2	81	69	1.33
July 3	84	61	0.00
July 4	89	66	0.00
July 5	91	66	0.00
July 6	89	64	0.05
July 7	82	56	0.00
July 8	80	60	0.06
July 9	81	56	0.00
July 10	84	56	0.00
July 11	87	63	0.00
July 12	83	61	0.02
July 13	70	59	0.51
July 14	82	59	0.16
July 15	87	66	0.03
July 16	83	61	0.00
July 17	80	58	0.15
July 18	77	53	0.00
July 19	81	55	0.00
July 20	85	60	0.00
July 21	83	53	0.00
July 22	83	58	0.00
July 23	83	59	0.60
July 24	83	59	0.00
July 25	85	62	0.00
July 26	90	66	0.00
July 27	86	66	1.25
July 28	92	67	0.22
July 29	92	67	0.29
July 30	84	62	0.00
July 31	80	60	0.00

August 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	83	60	0.00
August 2	84	62	0.00
August 3	84	61	0.00
August 4	87	62	0.00
August 5	85	64	0.00
August 6	82	64	0.00
August 7	81	64	0.00
August 8	80	57	0.00
August 9	85	59	0.18
August 10	79	58	0.00
August 11	85	61	0.00
August 12	86	63	0.37
August 13	86	58	0.00
August 14	77	63	0.04
August 15	68	60	1.31
August 16	78	55	0.00
August 17	80	56	0.00
August 18	76	52	0.00
August 19	77	53	0.00
August 20	85	63	0.00
August 21	93	65	0.00
August 22	n/a	62	0.00
August 23	89	63	0.00
August 24	98	76	0.00
August 25	97	69	0.00
August 26	84	69	0.03
August 27	72	60	0.00
August 28	74	51	0.00
August 29	81	52	0.00
August 30	83	53	0.00
August 31	72	45	0.00

September 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	79	46	0.00
September 2	84	50	0.00
September 3	89	58	0.00
September 4	94	64	0.00
September 5	93	67	0.00
September 6	91	72	0.01
September 7	77	61	0.09
September 8	68	59	0.00
September 9	67	48	0.00
September 10	76	50	0.00
September 11	83	57	0.20
September 12	65	53	0.00
September 13	72	51	0.11
September 14	69	43	0.00
September 15	76	43	0.00
September 16	79	46	0.00
September 17	76	57	0.93
September 18	71	48	0.07
September 19	74	49	0.00
September 20	69	56	0.55
September 21	77	60	0.00
September 22	74	60	0.05
September 23	79	64	0.02
September 24	81	58	0.00
September 25	79	59	0.20
September 26	75	61	0.73
September 27	70	61	0.39
September 28	71	59	0.00
September 29	68	51	0.00
September 30	77	52	0.00

October 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	86	58	0.00
October 2	86	55	0.00
October 3	85	54	0.00
October 4	85	54	0.00
October 5	81	54	0.00
October 6	75	46	0.00
October 7	52	40	0.06
October 8	58	38	0.00
October 9	55	39	0.00
October 10	57	38	0.00
October 11	61	32	0.00
October 12	65	32	0.24
October 13	55	49	0.15
October 14	53	48	2.03
October 15	54	39	0.17
October 16	58	41	0.00
October 17	55	32	0.00
October 18	64	32	0.00
October 19	66	44	0.06
October 20	61	47	0.11
October 21	62	40	0.00
October 22	59	38	0.00
October 23	58	35	0.00
October 24	67	44	0.00
October 25	81	59	0.06
October 26	63	59	0.11
October 27	65	61	0.46
October 28	68	37	0.00
October 29	44	37	0.00
October 30	39	26	0.01
October 31	39	26	0.01

November 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
November 1	37	22	0.02	0.2
November 2	40	22	0.00	0.0
November 3	55	31	0.00	0.0
November 4	53	36	0.00	0.0
November 5	55	30	0.00	0.0
November 6	59	30	0.00	0.0
November 7	67	42	0.00	0.0
November 8	53	41	0.12	0.0
November 9	48	35	0.30	0.0
November 10	54	33	0.00	0.0
November 11	44	24	0.00	0.0
November 12	48	25	0.00	0.0
November 13	56	32	0.00	0.0
November 14	60	25	0.00	0.0
November 15	61	26	0.00	0.0
November 16	64	33	0.00	0.0
November 17	65	39	0.00	0.0
November 18	47	23	0.00	0.0
November 19	54	23	0.00	0.0
November 20	54	26	0.00	0.0
November 21	47	35	0.66	0.0
November 22	42	32	0.00	0.0
November 23	44	29	0.00	0.0
November 24	43	21	0.00	0.0
November 25	31	20	0.00	0.0
November 26	36	23	0.10	1.5
November 27	32	19	0.08	1.6
November 28	25	10	0.00	0.0
November 29	23	10	0.00	0.0
November 30	42	20	0.00	0.0

December 2023 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	49	27	0.00	0.0
December 2	36	32	0.21	0.5
December 3	38	32	0.21	0.0
December 4	38	32	0.00	0.0
December 5	37	32	0.08	0.5
December 6	37	31	0.00	0.0
December 7	38	30	0.00	0.0
December 8	52	29	0.00	0.0
December 9	55	42	0.28	0.0
December 10	43	30	0.01	0.0
December 11	32	25	0.00	0.0
December 12	36	25	0.00	0.0
December 13	35	16	0.00	0.0
December 14	41	16	0.00	0.0
December 15	51	24	0.00	0.0
December 16	48	25	0.00	0.0
December 17	43	39	0.13	0.0
December 18	41	28	0.00	0.0
December 19	28	12	0.00	0.0
December 20	34	14	0.00	0.0
December 21	42	25	0.00	0.0
December 22	40	30	0.00	0.0
December 23	45	34	0.26	0.0
December 24	46	39	0.02	0.0
December 25	52	45	0.00	0.0
December 26	55	36	0.26	0.0
December 27	36	30	0.00	0.0
December 28	41	30	0.01	0.0
December 29	35	32	0.19	0.0
December 30	35	22	0.00	0.0
December 31	37	22	0.03	0.3

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Weather Station Details

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