Janesville Weather in 1999

Historical record of Janesville, Wisconsin weather for the year 1999 based on NOAA data.

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1999 Janesville Weather Extremes
Highest temperature	97 °F	July 31
Lowest temperature	-23 °F	January 8
Highest daily low	76 °F	July 5
Lowest daily high	3 °F	January 5
Most daily precipitation	2.1 inches	April 23
Most daily snow	10.0 inches	January 3
Total annual precipitation	32.9 inches	-
Total annual snow	37.9 inches	-

What was the hottest temperature in Janesville in 1999?

The highest temperature recorded in Janesville, Wisconsin in 1999 was 97 °F which happened on July 31.

Highest Temperatures: All-Time By Year

Highest Temperatures in Janesville in 1999

Rank	Temperature	Date
1	97 °F	Jul 31
2	96 °F	Jul 30
2	96 °F	Jul 26
4	94 °F	Jul 25
4	94 °F	Jul 24
4	94 °F	Jul 17
7	92 °F	Sep 3
7	92 °F	Jul 23
7	92 °F	Jul 6
7	92 °F	Jul 5

What was the coldest temperature in Janesville in 1999?

The lowest temperature recorded in Janesville, Wisconsin in 1999 was -23 °F which happened 4 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Janesville in 1999

Rank	Temperature	Date
1	-23 °F	January 8
1	-23 °F	January 7
1	-23 °F	January 6
1	-23 °F	January 5
5	-13 °F	January 10
6	-9 °F	January 11
7	-7 °F	January 9
8	-4 °F	January 4
9	-3 °F	December 22
9	-3 °F	January 12

January 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	14	1	0.00	0.0
January 2	19	2	0.14	2.5
January 3	21	2	0.30	10.0
January 4	21	-4	0.00	0.0
January 5	3	-23	0.00	0.0
January 6	13	-23	0.08	1.5
January 7	n/a	-23	0.02	0.3
January 8	6	-23	0.05	0.5
January 9	14	-7	0.08	4.0
January 10	8	-13	0.05	1.5
January 11	9	-9	0.03	0.5
January 12	8	-3	0.17	3.0
January 13	14	2	0.04	1.5
January 14	18	4	0.00	0.0
January 15	19	14	0.02	0.9
January 16	32	15	0.00	0.0
January 17	40	10	0.00	0.0
January 18	37	12	0.41	0.0
January 19	34	15	0.00	0.0
January 20	32	13	0.00	0.0
January 21	32	24	0.00	0.0
January 22	36	28	0.43	0.0
January 23	36	32	0.19	0.0
January 24	33	28	0.48	0.3
January 25	33	24	0.15	1.5
January 26	26	10	0.00	0.0
January 27	39	12	0.00	0.0
January 28	43	30	0.00	0.0
January 29	33	25	0.00	0.0
January 30	34	19	0.00	0.0
January 31	40	21	0.00	0.0

February 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	37	21	0.00	0.0
February 2	38	33	0.04	0.0
February 3	42	34	0.04	0.0
February 4	43	20	0.00	0.0
February 5	28	19	0.00	0.0
February 6	37	24	0.06	0.0
February 7	44	28	0.00	0.0
February 8	36	27	0.00	0.0
February 9	44	35	0.00	0.0
February 10	51	29	0.00	0.0
February 11	58	34	0.00	0.0
February 12	66	23	0.57	0.0
February 13	26	12	0.00	0.0
February 14	35	15	0.00	0.0
February 15	47	26	0.00	0.0
February 16	54	31	0.00	0.0
February 17	37	26	0.00	0.0
February 18	34	20	0.00	0.0
February 19	34	24	0.00	0.0
February 20	31	17	0.00	0.0
February 21	30	15	0.00	0.0
February 22	34	14	0.00	0.0
February 23	33	16	0.00	0.0
February 24	36	18	0.00	0.0
February 25	32	18	0.19	2.5
February 26	36	26	0.00	0.0
February 27	45	26	0.11	0.0
February 28	45	33	0.02	0.0

March 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	40	30	0.00	0.0
March 2	44	30	0.00	0.0
March 3	41	23	0.04	0.0
March 4	35	17	0.00	0.0
March 5	37	20	0.00	0.0
March 6	33	17	0.19	2.0
March 7	25	3	0.03	0.3
March 8	30	8	0.00	0.0
March 9	30	23	0.18	3.0
March 10	31	15	0.02	0.3
March 11	38	18	0.00	0.0
March 12	38	18	0.00	0.0
March 13	40	20	0.00	0.0
March 14	41	23	0.00	0.0
March 15	44	22	0.00	0.0
March 16	46	28	0.00	0.0
March 17	56	36	0.00	0.0
March 18	59	31	0.00	0.0
March 19	45	24	0.00	0.0
March 20	47	23	0.00	0.0
March 21	54	27	0.00	0.0
March 22	46	24	0.00	0.0
March 23	46	21	0.00	0.0
March 24	55	27	0.00	0.0
March 25	45	27	0.00	0.0
March 26	36	19	0.00	0.0
March 27	51	23	0.00	0.0
March 28	58	30	0.00	0.0
March 29	54	29	0.04	0.0
March 30	62	32	0.00	0.0
March 31	72	46	0.00	0.0

April 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	73	52	0.00	0.0
April 2	64	49	0.00	0.0
April 3	76	48	0.00	0.0
April 4	68	51	0.80	0.0
April 5	58	41	0.01	0.0
April 6	59	41	0.53	0.0
April 7	59	35	0.01	0.0
April 8	76	37	0.00	0.0
April 9	68	41	0.91	0.0
April 10	n/a	n/a	0.20	n/a
April 11	53	36	0.03	0.0
April 12	50	32	0.01	0.0
April 13	53	32	0.00	0.0
April 14	65	33	0.00	0.0
April 15	65	37	0.00	0.0
April 16	55	41	0.61	0.0
April 17	57	41	0.02	0.0
April 18	51	40	0.01	0.0
April 19	51	31	0.01	0.0
April 20	55	32	0.01	0.0
April 21	53	36	0.48	0.0
April 22	58	45	0.58	0.0
April 23	51	n/a	2.05	0.0
April 24	56	33	0.00	0.0
April 25	60	32	0.00	0.0
April 26	65	36	0.00	0.0
April 27	69	41	0.00	0.0
April 28	53	44	1.05	0.0
April 29	64	42	0.00	0.0
April 30	66	37	0.00	0.0

May 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	70	38	0.00
May 2	76	39	0.00
May 3	75	44	0.00
May 4	78	53	0.00
May 5	81	61	0.01
May 6	78	53	0.28
May 7	54	49	0.58
May 8	54	48	0.00
May 9	57	46	0.00
May 10	68	42	0.00
May 11	77	50	0.00
May 12	79	52	0.45
May 13	67	47	0.05
May 14	61	41	0.00
May 15	71	47	0.00
May 16	68	53	0.01
May 17	64	60	0.48
May 18	71	56	0.32
May 19	70	44	0.33
May 20	75	48	0.00
May 21	79	54	0.00
May 22	74	57	0.00
May 23	77	54	0.00
May 24	71	47	0.04
May 25	56	42	0.00
May 26	67	47	0.00
May 27	74	43	0.00
May 28	82	43	0.00
May 29	87	56	0.00
May 30	86	55	0.00
May 31	85	59	0.00

June 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	78	56	0.40
June 2	72	55	1.10
June 3	73	52	0.03
June 4	76	48	0.00
June 5	73	55	0.19
June 6	88	64	0.00
June 7	90	65	0.44
June 8	86	61	0.00
June 9	91	63	0.00
June 10	90	66	0.01
June 11	90	66	0.10
June 12	88	68	0.20
June 13	85	67	0.85
June 14	73	57	0.53
June 15	73	60	0.00
June 16	67	50	0.00
June 17	68	46	0.19
June 18	71	46	0.00
June 19	78	50	0.00
June 20	79	52	0.00
June 21	84	55	0.00
June 22	83	61	0.00
June 23	86	66	0.07
June 24	77	65	0.33
June 25	88	61	0.00
June 26	91	61	0.00
June 27	87	64	0.00
June 28	89	67	0.08
June 29	84	52	0.01
June 30	75	55	0.00

July 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	78	61	0.27
July 2	80	62	0.00
July 3	81	64	0.21
July 4	87	73	0.00
July 5	92	76	0.00
July 6	92	71	0.02
July 7	83	56	0.00
July 8	86	58	0.00
July 9	86	62	0.08
July 10	86	56	0.00
July 11	77	52	0.00
July 12	82	54	0.00
July 13	87	57	0.00
July 14	84	57	0.00
July 15	87	64	0.00
July 16	91	68	0.00
July 17	94	70	1.04
July 18	81	65	0.40
July 19	81	67	0.09
July 20	85	65	0.08
July 21	82	68	1.24
July 22	90	70	0.02
July 23	92	73	0.00
July 24	94	66	0.83
July 25	94	69	0.00
July 26	96	72	0.12
July 27	88	68	0.22
July 28	90	71	0.00
July 29	90	67	0.00
July 30	96	70	0.02
July 31	97	73	0.17

August 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	84	62	0.00
August 2	78	59	0.00
August 3	79	57	0.00
August 4	82	59	0.00
August 5	80	58	0.00
August 6	81	59	0.00
August 7	85	62	0.01
August 8	75	63	0.20
August 9	72	49	0.00
August 10	71	53	0.11
August 11	84	60	0.00
August 12	83	62	0.35
August 13	79	64	0.21
August 14	72	52	0.01
August 15	77	49	0.00
August 16	80	51	0.00
August 17	82	59	0.00
August 18	84	59	0.00
August 19	84	59	0.50
August 20	74	53	0.02
August 21	80	54	0.00
August 22	n/a	n/a	n/a
August 23	80	56	0.11
August 24	70	60	1.00
August 25	77	64	0.00
August 26	82	58	0.00
August 27	85	60	0.00
August 28	86	60	0.00
August 29	91	60	0.00
August 30	78	50	0.00
August 31	74	48	0.01

September 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	80	48	0.00
September 2	85	50	0.00
September 3	92	57	0.00
September 4	89	62	0.00
September 5	91	62	0.00
September 6	87	52	0.00
September 7	75	47	0.00
September 8	83	48	0.05
September 9	80	49	0.00
September 10	63	44	0.00
September 11	74	43	0.00
September 12	80	43	0.00
September 13	73	48	0.06
September 14	67	46	0.00
September 15	69	39	0.00
September 16	67	40	0.00
September 17	71	38	0.00
September 18	74	39	0.00
September 19	78	44	0.00
September 20	81	45	0.05
September 21	59	38	0.01
September 22	61	34	0.00
September 23	76	35	0.00
September 24	83	44	0.00
September 25	70	40	0.00
September 26	81	40	0.00
September 27	84	55	1.12
September 28	56	51	1.56
September 29	54	46	0.94
September 30	62	40	0.00

October 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	69	39	0.00
October 2	59	39	0.06
October 3	50	34	0.00
October 4	43	33	0.50
October 5	54	33	0.00
October 6	65	36	0.00
October 7	61	39	0.00
October 8	73	46	0.00
October 9	71	46	0.01
October 10	76	47	0.00
October 11	75	36	0.00
October 12	69	37	0.00
October 13	76	52	0.00
October 14	53	30	0.01
October 15	62	32	0.00
October 16	81	44	0.45
October 17	62	36	0.00
October 18	50	29	0.00
October 19	51	29	0.00
October 20	58	36	0.00
October 21	50	31	0.00
October 22	68	39	0.00
October 23	49	37	0.00
October 24	47	22	0.00
October 25	52	22	0.00
October 26	67	34	0.00
October 27	59	32	0.00
October 28	63	35	0.00
October 29	71	35	0.00
October 30	76	45	0.00
October 31	71	39	0.00

November 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	67	38	0.00
November 2	70	36	0.00
November 3	45	25	0.00
November 4	47	22	0.00
November 5	63	25	0.00
November 6	63	27	0.00
November 7	54	26	0.00
November 8	59	26	0.00
November 9	74	35	0.00
November 10	74	48	0.00
November 11	64	40	0.05
November 12	46	32	0.01
November 13	61	32	0.00
November 14	70	32	0.00
November 15	50	25	0.00
November 16	48	26	0.00
November 17	44	27	0.00
November 18	49	27	0.00
November 19	70	38	0.02
November 20	56	39	0.01
November 21	44	29	0.00
November 22	51	31	0.00
November 23	59	36	0.16
November 24	60	36	0.33
November 25	47	24	0.00
November 26	46	23	0.00
November 27	46	27	0.07
November 28	46	22	0.00
November 29	44	22	0.00
November 30	36	16	0.00

December 1999 Janesville Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	38	16	0.00	0.0
December 2	43	30	0.00	0.0
December 3	57	41	0.00	0.0
December 4	54	43	0.22	0.0
December 5	47	36	0.66	0.0
December 6	37	25	0.01	0.0
December 7	34	24	0.00	0.0
December 8	41	28	0.00	0.0
December 9	46	29	0.01	0.0
December 10	42	27	0.34	0.0
December 11	33	18	0.00	0.0
December 12	38	18	0.00	0.0
December 13	41	22	0.00	0.0
December 14	34	25	0.00	0.0
December 15	37	32	0.04	0.0
December 16	36	22	0.01	0.0
December 17	23	16	0.00	0.0
December 18	24	8	0.00	0.0
December 19	28	7	0.00	0.0
December 20	35	12	0.04	0.0
December 21	14	-2	0.00	0.0
December 22	12	-3	0.02	0.3
December 23	14	-2	0.00	0.0
December 24	14	-1	0.10	1.0
December 25	36	n/a	0.00	0.0
December 26	36	11	0.00	0.0
December 27	28	19	0.05	0.5
December 28	20	8	0.00	0.0
December 29	32	16	0.01	0.0
December 30	45	26	0.00	0.0
December 31	38	22	0.00	0.0

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Weather Station Details

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