Wilmington Weather in 1999

Historical record of Wilmington, Delaware weather for the year 1999 based on NOAA data.

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1999 Wilmington Weather Extremes
Highest temperature	100 °F	July 19
Lowest temperature	13 °F	January 6
Highest daily low	80 °F	July 5
Lowest daily high	26 °F	January 11
Most daily precipitation	8.3 inches	September 16
Most daily snow	4.0 inches	January 8
Total annual precipitation	47.7 inches	-
Total annual snow	6.5 inches	-

What was the hottest temperature in Wilmington in 1999?

The highest temperature recorded in Wilmington, Delaware in 1999 was 100 °F which happened on July 19.

Highest Temperatures: All-Time By Year

Highest Temperatures in Wilmington in 1999

Rank	Temperature	Date
1	100 °F	Jul 19
2	99 °F	Jul 5
3	98 °F	Jul 23
3	98 °F	Jul 18
3	98 °F	Jul 6
6	97 °F	Jul 4
7	96 °F	Aug 1
7	96 °F	Jul 28
7	96 °F	Jul 17
10	95 °F	Jul 31
10	95 °F	Jul 25
10	95 °F	Jul 15

What was the coldest temperature in Wilmington in 1999?

The lowest temperature recorded in Wilmington, Delaware in 1999 was 13 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Wilmington in 1999

Rank	Temperature	Date
1	13 °F	January 6
1	13 °F	January 2
3	14 °F	February 23
4	16 °F	December 25
4	16 °F	January 5
6	17 °F	December 24
6	17 °F	March 8
6	17 °F	February 22
9	18 °F	February 1
10	19 °F	January 11
10	19 °F	January 10
10	19 °F	January 4
10	19 °F	January 1

January 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	32	19	0.00	0.0
January 2	26	13	0.04	0.2
January 3	55	26	1.44	0.0
January 4	31	19	0.00	0.0
January 5	27	16	0.00	0.0
January 6	34	13	0.00	0.0
January 7	36	20	0.00	0.0
January 8	31	21	0.37	4.0
January 9	41	28	0.18	0.0
January 10	28	19	0.00	0.0
January 11	26	19	0.00	0.0
January 12	51	23	0.00	0.0
January 13	54	31	0.01	0.0
January 14	31	23	0.10	0.3
January 15	36	26	1.04	0.0
January 16	48	23	0.00	0.0
January 17	56	30	0.00	0.0
January 18	60	36	1.03	0.0
January 19	50	33	0.00	0.0
January 20	49	34	0.04	0.0
January 21	50	29	0.05	0.0
January 22	47	42	0.03	0.0
January 23	65	45	0.05	0.0
January 24	62	37	1.01	0.0
January 25	45	34	0.02	0.0
January 26	46	32	0.00	0.0
January 27	49	26	0.00	0.0
January 28	50	33	0.00	0.0
January 29	46	28	0.00	0.0
January 30	44	24	0.00	0.0
January 31	31	21	0.00	0.0

February 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	41	18	0.04
February 2	52	36	0.70
February 3	55	35	0.00
February 4	49	34	0.04
February 5	46	33	0.00
February 6	44	30	0.02
February 7	42	29	0.32
February 8	41	28	0.13
February 9	49	25	0.00
February 10	54	32	0.00
February 11	55	27	0.00
February 12	71	34	0.56
February 13	41	27	0.00
February 14	36	24	0.00
February 15	48	21	0.00
February 16	57	26	0.00
February 17	50	34	0.08
February 18	49	35	0.87
February 19	45	30	0.00
February 20	40	27	0.00
February 21	36	23	0.00
February 22	31	17	0.00
February 23	27	14	0.00
February 24	38	21	0.00
February 25	42	22	0.00
February 26	47	28	0.00
February 27	49	27	0.00
February 28	50	40	0.75

March 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	47	35	0.01	0.0
March 2	52	32	0.00	0.0
March 3	59	39	0.15	0.0
March 4	50	31	0.03	0.0
March 5	43	27	0.00	0.0
March 6	49	34	0.48	0.0
March 7	42	21	0.00	0.0
March 8	37	17	0.00	0.0
March 9	32	20	0.00	0.0
March 10	45	27	0.00	0.0
March 11	41	25	0.00	0.0
March 12	39	29	0.00	0.0
March 13	50	29	0.00	0.0
March 14	39	32	1.03	2.0
March 15	42	33	0.14	0.0
March 16	49	30	0.00	0.0
March 17	69	33	0.00	0.0
March 18	70	44	0.00	0.0
March 19	51	36	0.00	0.0
March 20	53	31	0.00	0.0
March 21	50	35	1.70	0.0
March 22	48	36	0.28	0.0
March 23	54	29	0.00	0.0
March 24	61	42	0.04	0.0
March 25	51	34	0.00	0.0
March 26	51	30	0.00	0.0
March 27	53	30	0.08	0.0
March 28	51	40	0.02	0.0
March 29	68	44	0.00	0.0
March 30	64	39	0.00	0.0
March 31	71	39	0.00	0.0

April 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	56	48	0.31
April 2	69	48	0.00
April 3	60	46	0.00
April 4	79	49	0.18
April 5	57	40	0.00
April 6	61	38	0.00
April 7	72	45	0.00
April 8	81	43	0.00
April 9	62	44	1.06
April 10	60	41	0.11
April 11	47	41	0.65
April 12	58	42	0.16
April 13	62	39	0.00
April 14	68	41	0.00
April 15	64	44	0.11
April 16	56	45	0.08
April 17	59	40	0.00
April 18	61	42	0.00
April 19	58	38	0.00
April 20	54	42	0.04
April 21	58	38	0.02
April 22	74	47	0.39
April 23	55	47	0.25
April 24	59	39	0.00
April 25	62	35	0.00
April 26	75	42	0.00
April 27	64	45	0.00
April 28	62	42	0.00
April 29	69	41	0.00
April 30	66	41	0.00

May 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	68	40	0.00
May 2	67	44	0.00
May 3	58	49	0.09
May 4	66	53	0.01
May 5	74	51	0.00
May 6	73	54	0.00
May 7	65	54	0.00
May 8	78	58	0.00
May 9	75	56	0.00
May 10	74	49	0.00
May 11	71	50	0.00
May 12	79	50	0.53
May 13	64	54	0.02
May 14	66	50	0.00
May 15	72	42	0.00
May 16	71	44	0.00
May 17	73	50	0.00
May 18	76	54	0.00
May 19	69	58	0.44
May 20	75	52	0.00
May 21	78	47	0.00
May 22	80	52	0.01
May 23	75	61	0.23
May 24	71	55	2.23
May 25	72	50	0.00
May 26	76	55	0.00
May 27	73	51	0.00
May 28	84	50	0.00
May 29	88	58	0.00
May 30	90	61	0.00
May 31	88	61	0.00

June 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	86	64	0.00
June 2	87	68	0.00
June 3	80	65	0.00
June 4	78	56	0.00
June 5	76	53	0.00
June 6	81	55	0.00
June 7	94	65	0.00
June 8	94	72	0.00
June 9	90	66	0.00
June 10	71	59	0.00
June 11	80	57	0.00
June 12	77	53	0.00
June 13	79	67	0.59
June 14	82	67	0.26
June 15	82	67	0.00
June 16	75	60	0.01
June 17	69	59	0.12
June 18	75	57	0.03
June 19	77	54	0.00
June 20	66	58	0.50
June 21	67	56	0.11
June 22	82	53	0.00
June 23	84	57	0.00
June 24	82	60	0.00
June 25	81	61	0.00
June 26	89	68	0.00
June 27	87	72	0.00
June 28	84	76	0.00
June 29	92	74	0.00
June 30	78	70	0.00

July 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	84	69	0.17
July 2	86	72	0.12
July 3	92	71	0.00
July 4	97	76	0.00
July 5	99	80	0.00
July 6	98	77	0.00
July 7	91	72	0.00
July 8	92	65	0.00
July 9	92	63	0.00
July 10	84	69	0.00
July 11	84	57	0.00
July 12	78	59	0.00
July 13	83	64	0.00
July 14	79	60	0.00
July 15	95	56	0.00
July 16	94	67	0.00
July 17	96	70	0.00
July 18	98	72	0.00
July 19	100	74	0.00
July 20	79	70	0.45
July 21	85	66	0.00
July 22	88	72	0.15
July 23	98	72	0.00
July 24	93	76	0.00
July 25	95	74	0.00
July 26	92	69	0.00
July 27	94	69	0.00
July 28	96	70	0.00
July 29	91	67	0.00
July 30	93	70	0.00
July 31	95	70	0.00

August 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	96	77	0.00
August 2	92	68	0.00
August 3	90	68	0.00
August 4	87	65	0.00
August 5	90	67	0.00
August 6	89	63	0.00
August 7	87	67	0.00
August 8	85	74	0.03
August 9	82	62	0.00
August 10	83	56	0.00
August 11	89	70	0.00
August 12	90	68	0.00
August 13	92	74	0.00
August 14	91	72	0.26
August 15	85	71	0.01
August 16	86	72	0.00
August 17	94	70	0.00
August 18	91	68	0.00
August 19	86	64	0.00
August 20	74	63	1.79
August 21	72	63	0.00
August 22	77	61	0.00
August 23	84	57	0.00
August 24	79	67	0.07
August 25	83	64	0.45
August 26	84	70	1.55
August 27	82	70	0.08
August 28	87	66	0.00
August 29	88	65	0.00
August 30	70	58	0.00
August 31	74	60	0.00

September 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	79	62	0.00
September 2	82	61	0.00
September 3	84	58	0.00
September 4	79	71	0.02
September 5	82	73	0.70
September 6	84	74	0.00
September 7	83	72	0.18
September 8	85	72	0.00
September 9	82	70	0.23
September 10	80	63	0.10
September 11	78	58	0.00
September 12	80	54	0.00
September 13	77	58	0.00
September 14	79	64	0.00
September 15	70	67	0.35
September 16	68	58	8.29
September 17	72	55	0.00
September 18	74	49	0.00
September 19	73	51	0.00
September 20	74	57	0.05
September 21	66	52	2.07
September 22	62	47	0.21
September 23	71	47	0.00
September 24	76	53	0.00
September 25	78	52	0.00
September 26	75	58	0.00
September 27	72	63	0.00
September 28	78	64	0.00
September 29	77	66	0.01
September 30	70	49	0.47

October 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	69	45	0.00
October 2	74	50	0.00
October 3	77	54	0.00
October 4	68	51	1.23
October 5	54	40	0.01
October 6	67	38	0.00
October 7	56	36	0.00
October 8	63	36	0.00
October 9	71	54	0.03
October 10	67	61	0.76
October 11	73	51	0.00
October 12	66	43	0.00
October 13	73	43	0.00
October 14	66	41	0.00
October 15	60	36	0.00
October 16	71	42	0.00
October 17	67	55	0.29
October 18	63	43	0.02
October 19	57	38	0.00
October 20	54	48	0.75
October 21	59	40	0.00
October 22	62	38	0.32
October 23	55	41	0.01
October 24	56	37	0.00
October 25	55	39	0.00
October 26	65	42	0.00
October 27	61	40	0.00
October 28	57	36	0.00
October 29	67	39	0.00
October 30	67	42	0.00
October 31	68	50	0.00

November 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	69	53	0.00
November 2	68	52	0.68
November 3	56	39	0.00
November 4	54	37	0.00
November 5	65	32	0.00
November 6	71	48	0.00
November 7	55	35	0.00
November 8	52	34	0.00
November 9	65	34	0.00
November 10	74	52	0.00
November 11	62	35	0.00
November 12	51	33	0.00
November 13	59	42	0.00
November 14	64	39	0.00
November 15	50	40	0.00
November 16	43	31	0.00
November 17	44	29	0.00
November 18	53	25	0.00
November 19	59	32	0.00
November 20	69	40	0.00
November 21	65	46	0.00
November 22	59	53	0.02
November 23	61	55	0.03
November 24	62	54	0.00
November 25	58	50	0.37
November 26	67	50	0.69
November 27	57	45	0.30
November 28	51	37	0.00
November 29	48	31	0.00
November 30	39	28	0.00

December 1999 Wilmington Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	37	23	0.00
December 2	48	25	0.00
December 3	57	28	0.00
December 4	67	36	0.00
December 5	63	39	0.00
December 6	59	49	0.50
December 7	51	36	0.00
December 8	51	31	0.00
December 9	54	31	0.00
December 10	56	40	0.41
December 11	48	36	0.00
December 12	50	31	0.00
December 13	45	28	0.61
December 14	45	41	1.15
December 15	45	37	0.00
December 16	49	34	0.00
December 17	46	30	0.00
December 18	46	30	0.00
December 19	45	35	0.00
December 20	52	38	0.25
December 21	46	34	0.01
December 22	40	27	0.01
December 23	43	22	0.00
December 24	30	17	0.00
December 25	30	16	0.00
December 26	37	22	0.00
December 27	38	28	0.00
December 28	32	22	0.00
December 29	38	26	0.00
December 30	51	32	0.00
December 31	49	31	0.00

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Weather Station Details

Years	Station	Coordinates
1948–2024	New Castle Airport	location
1932–1947	Wilmington Porter Research	location
1894–1931	Wilmington City Hall	location