August
August · October · March
Mexico · 1991–2020
August leads for comfortable weather in San Antonio: typically 24.6°C by day, 12.7°C at night, with 59 mm of rain. Based on measured 1991–2020 NOAA station history.
August · October · March
May · April · June
January · October · November
The weakest month is January, scoring 69 against August’s 88 — nights drop to 4.9°C, and days reach only 20.3°C, 4° below the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 20.3°C | 4.9°C | 17 mm | 1.9 | 10 h 55 | 69 | Good coverage |
| February | 22.6°C | 6.2°C | 14 mm | 1.4 | 11 h 23 | 79 | Good coverage |
| March | 25.5°C | 8.5°C | 10 mm | 1.1 | 11 h 58 | 83 | Good coverage |
| April | 28°C | 10.8°C | 13 mm | 2 | 12 h 38 | 79 | Good coverage |
| May | 28.9°C | 12.6°C | 32 mm | 4.5 | 13 h 11 | 78 | Good coverage |
| June | 26.5°C | 13.4°C | 63 mm | 6.9 | 13 h 28 | 81 | Good coverage |
| July | 24.5°C | 12.7°C | 83 mm | 7.8 | 13 h 21 | 83 | Good coverage |
| August | 24.6°C | 12.7°C | 59 mm | 6.4 | 12 h 53 | 88 | Good coverage |
| September | 23°C | 12.2°C | 78 mm | 8.3 | 12 h 15 | 81 | Good coverage |
| October | 22.4°C | 9.6°C | 33 mm | 4.5 | 11 h 36 | 84 | Good coverage |
| November | 21.8°C | 7.3°C | 9 mm | 1.3 | 11 h 03 | 79 | Good coverage |
| December | 20.8°C | 5.4°C | 6 mm | 1 | 10 h 47 | 72 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 31.7°C24 Jan 1971 | -5.0°C5 Jan 2000 | 32 mm12 Jan 2002 | 118 mm1992 · driest 0 mm in 1998 | 46 |
| February | 30.6°C5 Feb 1973 | -5.0°C9 Feb 1967 | 60 mm3 Feb 2010 | 125 mm2010 · driest 0 mm in 1983 | 46 |
| March | 33.9°C13 Mar 2006 | -1.7°C24 Mar 1986 | 36 mm19 Mar 1997 | 87 mm2004 · driest 0 mm in 1977 | 48 |
| April | 36.1°C23 Apr 1995 | 1.7°C1 Apr 1987 | 39 mm16 Apr 1965 | 90 mm1986 · driest 0 mm in 1964 | 45 |
| May | 42.2°C27 May 1987 | 3.9°C31 May 1984 | 47 mm20 May 1982 | 102 mm1992 · driest 2 mm in 2011 | 45 |
| June | 38.9°C26 Jun 1964 | 1.7°C2 Jun 1964 | 54 mm29 Jun 1968 | 201 mm1971 · driest 1 mm in 1982 | 45 |
| July | 35.0°C19 Jul 1981 | 3.9°C5 Jul 1996 | 69 mm12 Jul 1976 | 273 mm1976 · driest 3 mm in 1989 | 48 |
| August | 32.8°C22 Aug 1970 | 6.7°C22 Aug 1972 | 60 mm11 Aug 1995 | 280 mm2008 · driest 9 mm in 1987 | 45 |
| September | 32.8°C3 Sep 1987 | 1.7°C26 Sep 1975 | 86 mm21 Sep 1993 | 174 mm2009 · driest 1 mm in 1997 | 45 |
| October | 32.8°C23 Oct 1970 | -1.1°C21 Oct 1975 | 35 mm9 Oct 1966 | 95 mm1998 · driest 0 mm in 1987 | 46 |
| November | 34.4°C12 Nov 1981 | -4.4°C15 Nov 1975 | 34 mm3 Nov 2002 | 45 mm1964 · driest 0 mm in 2005 | 46 |
| December | 29.4°C19 Dec 1978 | -5.0°C31 Dec 1983 | 64 mm3 Dec 1979 | 98 mm1979 · driest 0 mm in 1977 | 45 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 4 | 0 | 2 | <1 |
| February | 11 | <1 | <1 | <1 |
| March | 21 | 4 | <1 | <1 |
| April | 25 | 13 | 0 | <1 |
| May | 27 | 15 | 0 | 1 |
| June | 22 | 6 | 0 | 2 |
| July | 17 | 2 | 0 | 3 |
| August | 17 | <1 | 0 | 2 |
| September | 11 | <1 | 0 | 3 |
| October | 11 | <1 | 0 | 1 |
| November | 7 | <1 | 1 | <1 |
| December | 5 | 0 | 2 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 65% | 6% | 2% | 5% | 18.4–22.2°C |
| February | 79% | 5% | <1% | 2% | 20.4–24.3°C |
| March | 91% | 4% | <1% | 2% | 23.1–27.4°C |
| April | 92% | 7% | 2% | 4% | 26.1–29.9°C |
| May | 86% | 14% | 3% | 12% | 27.2–30.3°C |
| June | 77% | 22% | 7% | 28% | 24.5–29.1°C |
| July | 75% | 23% | 9% | 21% | 22.1–26.7°C |
| August | 79% | 20% | 6% | 22% | 22.9–26.6°C |
| September | 71% | 24% | 8% | 28% | 21.5–25.3°C |
| October | 76% | 13% | 3% | 10% | 20.1–24.6°C |
| November | 78% | 4% | <1% | 2% | 20.1–23.9°C |
| December | 69% | 5% | <1% | 1% | 19.3–22.3°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page