San Antonio Weather in 2021

Historical record of San Antonio, Texas weather for the year 2021 based on NOAA data.

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2021 San Antonio Weather Extremes
Highest temperature	100 °F	September 20
Lowest temperature	9 °F	February 15
Highest daily low	80 °F	June 21
Lowest daily high	26 °F	February 16
Most daily precipitation	2.6 inches	October 13
Most daily snow	2.5 inches	February 18
Total annual precipitation	34.6 inches	-
Total annual snow	6.4 inches	-

What was the hottest temperature in San Antonio in 2021?

The highest temperature recorded in San Antonio, Texas in 2021 was 100 °F which happened 3 different times.

Highest Temperatures: All-Time By Year

Highest Temperatures in San Antonio in 2021

Rank	Temperature	Date
1	100 °F	Sep 20
1	100 °F	Sep 8
1	100 °F	Sep 6
4	99 °F	Sep 18
4	99 °F	Sep 5
4	99 °F	Sep 2
4	99 °F	Sep 1
8	98 °F	Sep 19
8	98 °F	Sep 3
8	98 °F	Aug 31
8	98 °F	Aug 21
8	98 °F	Aug 20
8	98 °F	Aug 19
8	98 °F	Aug 18

What was the coldest temperature in San Antonio in 2021?

The lowest temperature recorded in San Antonio, Texas in 2021 was 9 °F which happened on Feb 15.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in San Antonio in 2021

Rank	Temperature	Date
1	9 °F	February 15
2	12 °F	February 16
3	13 °F	February 14
4	19 °F	February 19
5	24 °F	February 17
6	26 °F	February 20
7	28 °F	February 18
8	29 °F	February 13
8	29 °F	January 12
10	30 °F	January 13

January 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	57	34	0.00	0.0
January 2	62	34	0.00	0.0
January 3	69	32	0.00	0.0
January 4	77	37	0.00	0.0
January 5	66	47	0.00	0.0
January 6	73	54	0.01	0.0
January 7	65	42	0.00	0.0
January 8	59	35	0.00	0.0
January 9	53	32	0.00	0.0
January 10	49	35	0.83	0.2
January 11	46	32	0.00	0.0
January 12	49	29	0.00	0.0
January 13	64	30	0.00	0.0
January 14	74	34	0.00	0.0
January 15	61	38	0.00	0.0
January 16	65	33	0.00	0.0
January 17	70	38	0.00	0.0
January 18	73	40	0.00	0.0
January 19	72	48	0.04	0.0
January 20	53	47	0.06	0.0
January 21	63	52	0.01	0.0
January 22	79	50	0.00	0.0
January 23	64	53	0.01	0.0
January 24	72	60	0.06	0.0
January 25	77	50	0.00	0.0
January 26	76	46	0.00	0.0
January 27	67	45	0.00	0.0
January 28	57	36	0.00	0.0
January 29	69	38	0.00	0.0
January 30	76	50	0.00	0.0
January 31	73	45	0.00	0.0

February 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	68	42	0.00	0.0
February 2	66	39	0.00	0.0
February 3	76	42	0.00	0.0
February 4	80	57	0.00	0.0
February 5	57	46	0.00	0.0
February 6	78	50	0.00	0.0
February 7	71	39	0.00	0.0
February 8	76	50	0.00	0.0
February 9	79	54	0.00	0.0
February 10	54	40	0.00	0.0
February 11	40	33	0.86	0.0
February 12	36	31	0.00	0.0
February 13	32	29	0.01	0.0
February 14	30	13	0.07	1.2
February 15	28	9	0.08	2.5
February 16	26	12	0.07	0.0
February 17	45	24	0.13	0.0
February 18	32	28	0.07	2.5
February 19	46	19	0.00	0.0
February 20	60	26	0.00	0.0
February 21	73	44	0.00	0.0
February 22	74	45	0.00	0.0
February 23	78	44	0.00	0.0
February 24	78	63	0.00	0.0
February 25	66	55	0.05	0.0
February 26	61	50	0.00	0.0
February 27	76	58	0.02	0.0
February 28	75	62	0.02	0.0

March 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	62	51	0.00
March 2	67	42	0.00
March 3	71	38	0.00
March 4	75	45	0.00
March 5	81	56	0.00
March 6	68	50	0.00
March 7	70	45	0.00
March 8	72	48	0.00
March 9	77	58	0.00
March 10	82	64	0.00
March 11	79	66	0.00
March 12	80	68	0.00
March 13	78	67	0.07
March 14	80	52	0.05
March 15	84	44	0.00
March 16	84	65	0.00
March 17	81	57	0.02
March 18	75	49	0.00
March 19	72	46	0.00
March 20	71	42	0.00
March 21	74	45	0.00
March 22	73	57	0.00
March 23	83	51	0.39
March 24	77	54	0.02
March 25	78	55	0.00
March 26	85	48	0.00
March 27	88	66	0.00
March 28	76	53	0.03
March 29	75	47	0.00
March 30	80	61	0.00
March 31	76	61	0.00

April 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	71	50	0.00
April 2	75	50	0.00
April 3	72	54	0.01
April 4	76	57	0.06
April 5	81	59	0.00
April 6	90	68	0.00
April 7	94	63	0.00
April 8	94	63	0.00
April 9	95	67	0.00
April 10	87	61	0.00
April 11	89	52	0.00
April 12	92	67	0.00
April 13	84	71	0.00
April 14	87	70	0.00
April 15	75	64	0.02
April 16	74	62	0.08
April 17	70	53	0.00
April 18	72	51	0.00
April 19	76	51	0.00
April 20	85	50	0.00
April 21	70	47	0.00
April 22	65	53	0.02
April 23	84	64	0.69
April 24	90	56	0.00
April 25	88	58	0.00
April 26	87	67	0.00
April 27	77	69	0.00
April 28	90	67	2.55
April 29	75	67	0.61
April 30	74	66	2.01

May 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	71	65	1.96
May 2	92	60	0.00
May 3	94	70	0.16
May 4	85	67	0.00
May 5	84	59	0.00
May 6	87	60	0.00
May 7	86	60	0.00
May 8	90	69	0.00
May 9	91	75	0.00
May 10	87	69	0.01
May 11	86	63	0.18
May 12	76	61	0.00
May 13	75	60	0.00
May 14	83	63	0.00
May 15	76	69	0.20
May 16	82	70	0.07
May 17	85	74	0.00
May 18	84	67	0.19
May 19	75	62	0.01
May 20	85	59	0.00
May 21	86	66	0.00
May 22	81	72	0.42
May 23	78	71	0.30
May 24	84	71	0.93
May 25	89	74	0.10
May 26	88	73	0.00
May 27	89	73	0.00
May 28	88	63	1.29
May 29	83	66	0.28
May 30	84	70	0.02
May 31	85	72	0.02

June 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	85	69	0.21
June 2	86	69	0.00
June 3	76	66	1.04
June 4	82	66	0.00
June 5	84	66	0.38
June 6	88	69	0.00
June 7	90	77	0.00
June 8	90	77	0.00
June 9	90	76	0.00
June 10	90	75	0.00
June 11	90	76	0.00
June 12	92	75	0.00
June 13	95	75	0.00
June 14	96	76	0.00
June 15	95	73	0.18
June 16	93	71	0.00
June 17	94	73	0.00
June 18	92	76	0.00
June 19	92	69	0.00
June 20	92	77	0.00
June 21	93	80	0.00
June 22	90	75	0.04
June 23	94	78	0.00
June 24	95	78	0.00
June 25	94	77	0.00
June 26	95	77	0.00
June 27	88	74	0.01
June 28	90	74	0.00
June 29	87	73	0.57
June 30	91	74	0.01

July 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	93	75	0.00
July 2	93	75	0.00
July 3	95	76	0.17
July 4	92	76	0.05
July 5	91	75	0.32
July 6	84	74	0.84
July 7	84	73	0.01
July 8	86	74	0.02
July 9	79	73	1.16
July 10	85	73	0.12
July 11	89	74	0.00
July 12	90	74	0.00
July 13	89	73	0.00
July 14	89	72	0.10
July 15	90	74	0.00
July 16	90	75	0.00
July 17	91	77	0.00
July 18	92	75	0.00
July 19	94	73	1.02
July 20	90	73	0.00
July 21	89	73	0.00
July 22	87	71	0.57
July 23	90	74	0.00
July 24	92	75	0.00
July 25	93	74	0.00
July 26	94	76	0.00
July 27	94	74	0.00
July 28	93	75	0.00
July 29	95	75	0.00
July 30	95	73	0.00
July 31	96	76	0.00

August 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	97	76	0.00
August 2	87	72	0.37
August 3	93	75	0.00
August 4	93	75	0.00
August 5	88	73	0.26
August 6	93	75	0.00
August 7	93	75	0.00
August 8	95	77	0.00
August 9	96	77	0.00
August 10	96	78	0.00
August 11	96	77	0.00
August 12	95	78	0.00
August 13	96	75	0.00
August 14	96	75	0.00
August 15	95	73	0.15
August 16	94	71	0.00
August 17	95	77	0.00
August 18	98	79	0.00
August 19	98	79	0.00
August 20	98	79	0.00
August 21	98	78	0.00
August 22	96	78	0.00
August 23	96	75	0.00
August 24	97	78	0.00
August 25	97	76	0.00
August 26	97	76	0.00
August 27	94	74	0.03
August 28	91	74	0.43
August 29	95	74	0.01
August 30	95	75	0.03
August 31	98	75	0.00

September 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	99	79	0.00
September 2	99	79	0.00
September 3	98	77	0.00
September 4	97	79	0.00
September 5	99	75	0.00
September 6	100	73	0.17
September 7	95	72	0.00
September 8	100	72	0.00
September 9	97	68	0.00
September 10	95	67	0.00
September 11	93	67	0.00
September 12	92	74	0.00
September 13	86	73	0.13
September 14	94	68	0.00
September 15	90	70	0.00
September 16	94	67	0.00
September 17	97	70	0.00
September 18	99	72	0.01
September 19	98	72	0.00
September 20	100	75	0.00
September 21	96	79	0.05
September 22	87	64	0.00
September 23	87	56	0.00
September 24	88	57	0.00
September 25	89	60	0.00
September 26	89	58	0.00
September 27	91	65	0.00
September 28	96	70	1.61
September 29	90	66	0.62
September 30	92	73	0.00

October 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	86	68	0.23
October 2	87	71	0.00
October 3	90	69	0.00
October 4	90	66	0.00
October 5	91	61	0.00
October 6	89	61	0.00
October 7	89	66	0.00
October 8	89	65	0.00
October 9	87	64	0.00
October 10	91	67	0.05
October 11	83	60	1.10
October 12	87	74	0.00
October 13	87	71	2.64
October 14	85	69	0.85
October 15	88	66	0.73
October 16	74	54	0.00
October 17	73	48	0.00
October 18	77	49	0.00
October 19	81	59	0.00
October 20	83	66	0.00
October 21	84	63	0.00
October 22	84	63	0.00
October 23	86	69	0.00
October 24	84	71	0.00
October 25	88	71	0.00
October 26	87	72	0.00
October 27	78	57	0.98
October 28	78	51	0.00
October 29	74	50	0.00
October 30	79	46	0.00
October 31	82	49	0.00

November 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	79	55	0.00
November 2	79	62	0.00
November 3	69	50	0.43
November 4	56	46	0.00
November 5	64	42	0.00
November 6	70	42	0.00
November 7	73	44	0.00
November 8	78	49	0.00
November 9	76	55	0.00
November 10	81	64	0.00
November 11	77	51	0.00
November 12	80	46	0.00
November 13	71	44	0.00
November 14	79	47	0.00
November 15	80	54	0.00
November 16	81	64	0.00
November 17	82	63	0.00
November 18	70	54	0.00
November 19	67	48	0.00
November 20	70	46	0.00
November 21	76	60	0.00
November 22	71	45	0.00
November 23	71	38	0.00
November 24	76	53	0.00
November 25	71	52	0.45
November 26	59	47	0.00
November 27	53	45	0.39
November 28	71	43	0.00
November 29	70	40	0.00
November 30	73	44	0.00

December 2021 San Antonio Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	76	51	0.00
December 2	75	53	0.00
December 3	80	65	0.00
December 4	76	65	0.00
December 5	77	68	0.00
December 6	72	50	0.00
December 7	68	45	0.00
December 8	78	45	0.00
December 9	78	61	0.00
December 10	83	65	0.00
December 11	70	42	0.00
December 12	61	34	0.00
December 13	67	43	0.00
December 14	75	60	0.00
December 15	81	69	0.00
December 16	80	69	0.00
December 17	79	70	0.00
December 18	71	48	0.85
December 19	52	40	0.05
December 20	59	42	0.00
December 21	66	37	0.00
December 22	73	42	0.00
December 23	71	48	0.00
December 24	77	57	0.00
December 25	77	60	0.00
December 26	76	57	0.00
December 27	77	60	0.00
December 28	72	59	0.00
December 29	85	59	0.00
December 30	82	56	0.00
December 31	83	64	0.00

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Weather Station Details

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