San Antonio Climate Records and Averages

The city of San Antonio is located in the south–central portion of Texas on the Balcones escarpment. Temperatures range from 50 degrees in January to the middle 80s in July and August. While the summer is hot with daily temperatures above 90 degrees over 80 percent of the time, extremely high temperatures are rare. Mild weather prevails during much of the winter months, with below–freezing temperatures occurring on an average of about 20 days each year.

Precipitation is fairly well-distributed throughout the year, with the heaviest amounts occurring during May and September. Precipitation from April through September usually occurs from thunderstorms and heavy precipitation may fall during short periods of time. Most of winter precipitation occurs as light rain or drizzle. Thunderstorms and heavy rains have occurred in all months of the year. Hail of damaging intensity seldom occurs, but small hail is frequent with the springtime thunderstorms. Measurable snow occurs only once in three or four years. Snowfall of 2 to 4 inches occurs about every ten years.

	Monthly Averages			Daily Extremes				Monthly Extremes
Temperatures in F	Max.	Min.	Avg	High	Date of daily extreme high	Low	Date of daily extreme low	Highest Avg	Year	Lowest Avg	Year
January	62.2	39.8	51.0	89	30/1971	0	31/1949	59.4	1952	43.3	1978
February	66.5	43.3	54.9	100	21/1996	6	02/1951	62.9	2009	46.4	1978
March	73.5	50.2	61.9	100	28/1971	19	02/1980	67.9	1974	54.9	1969
April	80.4	58.4	69.4	101	19/1996	31	03/1987	76.7	2006	63.9	1997
May	86.4	66.2	76.3	104	31/2004	43	09/1984	81.9	1996	71.3	1976
June	92.1	72.3	82.2	107	15/1998	53	02/1964	87.4	1990	78.8	1966
July	94.8	74.4	84.6	106	26/1954	62	16/1967	88.7	2009	79.8	1976
August	95.3	74.1	84.7	108	19/1986	61	25/1966	88.3	2009	81.1	1974
September	89.8	69.2	79.5	105	25/2005	46	19/1981	84.3	2005	72.3	1974
October	82.0	59.7	70.9	99	12/1991	27	31/1993	76.9	2004	61.0	1976
November	71.5	48.9	60.2	94	04/1988	21	29/1976	65.7	1973	52.1	1976
December	64.5	41.6	53.1	90	25/1955	6	23/1989	60.1	1970	43.0	1983

Annual	79.9	58.2	69.1	108	1986/08/19	0	1949/01/31	72.1	2006	66.4	1976

Winter	64.4	41.6	53.0	100	1996/02/21	0	1949/01/31	57.8	1971	47.7	1978
Spring	80.1	58.3	69.2	104	2004/05/31	19	1980/03/02	74.3	2006	65.8	1969
Summer	94.1	73.6	83.8	108	1986/08/19	53	1964/06/02	87.8	2009	80.4	1976
Fall	81.1	59.3	70.2	105	2005/09/25	21	1976/11/29	73.4	2005	63.5	1976

												Total Snowfall
	Avg.	High	Year	Low	Year	1 Day Max.		>= 0.01 in.	>= 0.10 in.	>= 0.50 in.	>= 1.00 in.	Mean	High	Year
	in.	in.	-	in.	-	in.	dd/yyyy or yyyymmdd	# Days	# Days	# Days	# Days	in.	in.	-
January	1.64	8.52	1968	0.00	1996	2.72	18/1968	8	3	1	0	0.4	15.9	1985
February	1.81	6.43	1965	0.01	1999	2.44	03/1986	7	4	1	0	0.2	3.5	1966
March	1.78	7.24	2007	0.03	1954	2.50	03/1992	8	3	1	1	0.0	0.0	-
April	2.48	9.32	1957	0.01	2005	3.60	26/1990	7	4	2	1	0.0	0.0	-
May	3.73	12.85	1987	0.12	2003	6.26	05/1993	8	5	2	1	0.0	0.0	-
June	3.56	11.95	1986	0.01	1967	6.18	03/1951	7	4	2	1	0.0	0.0	-
July	2.30	16.92	2002	0.00	1984	9.52	01/2002	5	3	1	1	0.0	0.0	-
August	2.52	11.14	1974	0.00	1952	5.73	16/2007	5	3	2	1	0.0	0.0	-
September	3.46	15.78	1946	0.05	1999	6.54	26/1973	7	5	2	1	0.0	0.0	-
October	3.46	18.07	1998	0.00	1952	11.26	17/1998	7	4	2	1	0.0	0.0	-
November	2.22	9.46	2004	0.00	1966	4.87	01/1977	7	3	1	1	0.0	0.3	1957
December	1.65	13.96	1991	0.03	1950	5.97	19/1991	7	3	1	0	0.0	0.2	1964

Annual	30.62	52.28	1973	13.70	1954	11.26	1998/10/17	82	45	18	9	0.6	15.9	1985

Winter	5.11	25.97	1992	0.44	1999	5.97	1991/12/19	22	10	3	1	0.6	15.9	1985
Spring	7.99	21.73	1957	0.52	1961	6.26	1993/05/05	23	12	5	2	-	-
Summer	8.38	25.00	2007	1.38	2009	9.52	2002/07/01	17	11	5	3	-	-
Fall	9.15	23.04	1998	0.73	2008	11.26	1998/10/17	20	12	5	3	-	0.3	1957

Winter = Dec, Jan, and Feb		Spring = Mar, Apr, and May
Summer = Jun, Jul, and Aug.		Fall = Sep, Oct, and Nov