San Antonio Weather in 2018

Historical record of San Antonio, Texas weather for the year 2018 based on NOAA data.

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2018 San Antonio Weather Extremes
Highest temperature	105 °F	July 23
Lowest temperature	21 °F	January 3
Highest daily low	81 °F	July 24
Lowest daily high	31 °F	January 1
Most daily precipitation	6.1 inches	September 3
Most daily snow	none	-
Total annual precipitation	41.2 inches	-
Total annual snow	none	-

What was the hottest temperature in San Antonio in 2018?

The highest temperature recorded in San Antonio, Texas in 2018 was 105 °F which happened on July 23.

Highest Temperatures: All-Time By Year

Highest Temperatures in San Antonio in 2018

Rank	Temperature	Date
1	105 °F	Jul 23
2	103 °F	Jul 22
3	102 °F	Jul 24
3	102 °F	Jul 1
5	101 °F	Aug 22
5	101 °F	Jun 6
5	101 °F	Jun 2
8	100 °F	Aug 29
8	100 °F	Aug 28
8	100 °F	Aug 27
8	100 °F	Aug 25
8	100 °F	Aug 24
8	100 °F	Aug 23
8	100 °F	Aug 21
8	100 °F	Aug 19
8	100 °F	Aug 17
8	100 °F	Aug 16
8	100 °F	Jul 30
8	100 °F	Jul 29
8	100 °F	Jul 20
8	100 °F	Jul 4
8	100 °F	Jul 3
8	100 °F	Jul 2
8	100 °F	Jun 30
8	100 °F	Jun 27
8	100 °F	Jun 5
8	100 °F	Jun 1

What was the coldest temperature in San Antonio in 2018?

The lowest temperature recorded in San Antonio, Texas in 2018 was 21 °F which happened on Jan 3.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in San Antonio in 2018

Rank	Temperature	Date
1	21 °F	January 3
2	22 °F	January 17
3	23 °F	November 14
4	26 °F	January 16
4	26 °F	January 1
6	28 °F	November 13
6	28 °F	January 14
8	29 °F	January 2
9	30 °F	February 12
9	30 °F	January 4

January 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	31	26	0.00
January 2	34	29	0.00
January 3	58	21	0.00
January 4	57	30	0.00
January 5	60	43	0.00
January 6	64	38	0.00
January 7	67	54	0.00
January 8	72	43	0.00
January 9	68	37	0.00
January 10	71	44	0.00
January 11	74	46	0.00
January 12	63	36	0.00
January 13	57	34	0.00
January 14	62	28	0.00
January 15	70	36	0.00
January 16	43	26	0.09
January 17	36	22	0.00
January 18	46	33	0.00
January 19	50	39	0.10
January 20	61	49	0.00
January 21	72	51	0.00
January 22	66	37	0.00
January 23	65	33	0.00
January 24	64	33	0.00
January 25	60	31	0.00
January 26	64	51	0.06
January 27	71	58	0.03
January 28	71	45	0.00
January 29	70	39	0.00
January 30	65	36	0.00
January 31	71	45	0.00

February 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	81	49	0.00
February 2	61	46	0.00
February 3	58	48	0.00
February 4	82	42	0.00
February 5	61	46	0.00
February 6	58	47	0.02
February 7	50	39	0.03
February 8	58	34	0.00
February 9	57	50	0.02
February 10	65	47	0.05
February 11	47	33	0.00
February 12	54	30	0.00
February 13	50	40	0.01
February 14	72	48	0.06
February 15	76	62	0.01
February 16	78	61	0.00
February 17	67	55	0.00
February 18	80	53	0.00
February 19	80	67	0.00
February 20	73	68	0.07
February 21	72	41	0.15
February 22	50	41	0.09
February 23	70	48	1.31
February 24	75	63	0.07
February 25	73	52	0.01
February 26	76	47	0.00
February 27	80	60	0.01
February 28	84	67	0.00

March 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	75	54	0.00
March 2	74	51	0.00
March 3	72	55	0.07
March 4	80	65	0.00
March 5	82	63	0.00
March 6	74	56	0.00
March 7	68	46	0.00
March 8	69	46	0.00
March 9	71	52	0.00
March 10	89	64	0.00
March 11	70	57	0.00
March 12	68	48	0.00
March 13	70	47	0.00
March 14	70	48	0.00
March 15	70	50	0.00
March 16	87	62	0.00
March 17	85	64	0.00
March 18	84	67	0.26
March 19	84	59	0.00
March 20	77	52	0.00
March 21	77	45	0.00
March 22	80	52	0.00
March 23	80	62	0.00
March 24	80	67	0.00
March 25	79	68	0.00
March 26	87	68	0.00
March 27	81	62	0.18
March 28	74	60	3.51
March 29	81	55	0.00
March 30	74	56	0.00
March 31	81	61	0.00

April 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	83	64	0.00
April 2	84	67	0.00
April 3	82	64	0.00
April 4	70	52	0.00
April 5	76	61	0.00
April 6	85	69	0.01
April 7	75	43	0.00
April 8	70	43	0.00
April 9	67	53	0.00
April 10	76	55	0.00
April 11	81	49	0.00
April 12	87	62	0.00
April 13	87	69	0.00
April 14	72	50	0.00
April 15	76	41	0.00
April 16	83	47	0.00
April 17	85	59	0.00
April 18	84	64	0.00
April 19	77	60	0.00
April 20	64	58	0.00
April 21	79	62	0.01
April 22	80	53	0.00
April 23	83	54	0.00
April 24	86	56	0.00
April 25	85	57	0.34
April 26	76	56	0.00
April 27	78	57	0.00
April 28	83	58	0.00
April 29	81	58	0.00
April 30	77	65	0.00

May 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	84	70	0.00
May 2	87	72	0.00
May 3	90	74	0.00
May 4	75	63	0.76
May 5	85	63	0.00
May 6	90	56	0.00
May 7	90	58	0.00
May 8	89	64	0.00
May 9	88	65	0.00
May 10	89	68	0.00
May 11	90	70	0.00
May 12	93	70	0.00
May 13	92	74	0.00
May 14	91	75	0.00
May 15	91	72	0.01
May 16	94	66	0.00
May 17	96	68	0.00
May 18	98	69	0.00
May 19	95	72	0.00
May 20	87	69	0.20
May 21	89	67	0.00
May 22	92	70	0.00
May 23	92	72	0.00
May 24	93	72	0.00
May 25	94	74	0.00
May 26	98	72	0.00
May 27	97	72	0.00
May 28	97	72	0.00
May 29	97	73	0.00
May 30	98	72	0.00
May 31	99	75	0.00

June 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	100	76	0.00
June 2	101	77	0.00
June 3	99	76	0.00
June 4	95	74	0.00
June 5	100	74	0.00
June 6	101	76	0.00
June 7	99	77	0.00
June 8	98	76	0.00
June 9	97	76	0.00
June 10	99	78	0.00
June 11	98	78	0.00
June 12	98	77	0.00
June 13	96	78	0.00
June 14	97	75	0.00
June 15	96	75	0.36
June 16	95	76	0.00
June 17	96	74	0.00
June 18	94	75	0.22
June 19	80	73	0.12
June 20	86	74	0.00
June 21	93	73	0.00
June 22	98	76	0.00
June 23	99	75	0.00
June 24	99	77	0.00
June 25	94	77	0.01
June 26	98	78	0.00
June 27	100	76	0.00
June 28	98	76	0.00
June 29	99	77	0.00
June 30	100	78	0.00

July 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	102	77	0.00
July 2	100	76	0.00
July 3	100	76	0.00
July 4	100	72	0.58
July 5	92	72	0.13
July 6	96	72	0.26
July 7	93	74	0.92
July 8	93	73	0.14
July 9	80	71	2.54
July 10	93	72	0.00
July 11	93	75	0.00
July 12	95	75	0.00
July 13	94	76	0.00
July 14	95	77	0.00
July 15	95	78	0.00
July 16	97	77	0.00
July 17	97	76	0.00
July 18	99	76	0.00
July 19	99	76	0.00
July 20	100	75	0.00
July 21	99	75	0.00
July 22	103	77	0.00
July 23	105	77	0.00
July 24	102	81	0.00
July 25	98	78	0.00
July 26	97	74	0.00
July 27	98	71	0.00
July 28	98	77	0.00
July 29	100	77	0.00
July 30	100	78	0.00
July 31	93	74	0.30

August 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	99	71	0.00
August 2	96	69	0.00
August 3	97	73	0.00
August 4	97	73	0.00
August 5	94	72	0.00
August 6	97	74	0.00
August 7	96	75	0.00
August 8	98	77	0.00
August 9	99	76	0.00
August 10	96	74	0.09
August 11	88	74	0.11
August 12	85	74	0.42
August 13	96	75	0.00
August 14	97	76	0.00
August 15	98	78	0.00
August 16	100	79	0.00
August 17	100	76	0.00
August 18	99	76	0.00
August 19	100	76	0.00
August 20	99	79	0.00
August 21	100	77	0.00
August 22	101	76	0.00
August 23	100	76	0.00
August 24	100	76	0.00
August 25	100	78	0.00
August 26	99	79	0.00
August 27	100	79	0.00
August 28	100	79	0.00
August 29	100	77	0.00
August 30	98	76	0.00
August 31	96	74	0.00

September 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	98	75	0.00
September 2	99	76	0.00
September 3	95	69	6.07
September 4	89	73	0.82
September 5	93	76	0.00
September 6	90	74	0.44
September 7	91	74	0.90
September 8	86	76	0.00
September 9	82	71	2.25
September 10	74	71	0.55
September 11	85	70	0.00
September 12	88	73	0.11
September 13	88	74	0.23
September 14	86	73	0.92
September 15	80	73	1.36
September 16	84	71	0.75
September 17	89	68	0.00
September 18	90	75	0.00
September 19	89	76	0.00
September 20	87	74	0.56
September 21	87	78	0.00
September 22	79	66	1.86
September 23	78	65	0.00
September 24	87	71	0.00
September 25	90	75	0.00
September 26	90	70	0.00
September 27	81	65	0.00
September 28	82	64	0.00
September 29	80	71	0.04
September 30	85	70	0.00

October 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	86	71	0.02
October 2	87	73	0.05
October 3	88	75	0.00
October 4	88	75	0.00
October 5	88	75	0.00
October 6	89	76	0.35
October 7	86	75	0.01
October 8	81	71	0.77
October 9	80	67	0.76
October 10	82	64	0.00
October 11	76	62	0.00
October 12	83	63	0.00
October 13	88	74	0.04
October 14	88	76	0.00
October 15	76	45	1.37
October 16	51	46	0.16
October 17	59	50	0.01
October 18	59	52	0.52
October 19	66	59	0.18
October 20	71	62	0.00
October 21	70	57	0.00
October 22	65	52	0.18
October 23	65	51	0.31
October 24	63	55	0.79
October 25	73	55	0.00
October 26	82	53	0.00
October 27	82	54	0.00
October 28	81	54	0.00
October 29	82	59	0.00
October 30	83	68	0.00
October 31	81	58	0.95

November 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	69	49	0.00
November 2	73	45	0.00
November 3	76	49	0.00
November 4	72	60	0.00
November 5	78	58	0.00
November 6	79	61	0.00
November 7	83	69	0.00
November 8	69	58	1.26
November 9	58	50	0.17
November 10	54	45	0.01
November 11	54	46	0.13
November 12	53	38	0.04
November 13	48	28	0.00
November 14	59	23	0.00
November 15	64	32	0.00
November 16	68	34	0.00
November 17	71	42	0.00
November 18	64	49	0.13
November 19	53	47	0.00
November 20	63	45	0.00
November 21	53	43	0.03
November 22	61	50	0.00
November 23	77	54	0.01
November 24	75	47	0.00
November 25	74	51	0.00
November 26	63	39	0.00
November 27	63	34	0.00
November 28	68	45	0.00
November 29	73	49	0.00
November 30	79	65	0.00

December 2018 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	79	49	0.00
December 2	75	47	0.00
December 3	67	48	0.00
December 4	59	42	0.00
December 5	54	45	0.00
December 6	63	52	0.03
December 7	63	49	1.57
December 8	50	40	0.02
December 9	57	36	0.00
December 10	61	33	0.00
December 11	58	33	0.00
December 12	63	51	0.00
December 13	69	42	0.00
December 14	57	42	0.00
December 15	71	35	0.00
December 16	68	34	0.00
December 17	70	42	0.00
December 18	67	39	0.00
December 19	70	52	0.02
December 20	65	44	0.00
December 21	67	36	0.00
December 22	77	37	0.00
December 23	66	44	0.00
December 24	64	43	0.00
December 25	75	60	0.00
December 26	72	56	0.24
December 27	72	48	0.30
December 28	59	41	0.00
December 29	47	42	0.00
December 30	44	39	0.15
December 31	61	41	0.02

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Weather Station Details

Years	Station	Coordinates
1947–2024	San Antonio International Airport	location
1893–1946	San Antonio Nursery	location