April
Other strong months: March and November
86/100 weather score
United States · 1991–2020
Best time to visit
San Antonio
For San Antonio, April has the most comfortable weather in our climate comparison. Typical daytime highs are 27.1°C, nights average 14°C, and rainfall totals about 48 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.
Best all-round monthApril
Typical daytime high27.1°C
Typical night-time low14°C
April rainfall48 mm
February
Other strong months: November and March
88/100 weather score
Make the answer personal
Choose the weather
that suits you.
Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.
4 months fit your choices for San Antonio
The lowest comfort score is 42 out of 100. July and August share that score. In July, that is mainly because days average 34.6°C, 11° above the 24°C the score treats as ideal.
Quick answers
Planning a trip to San Antonio?
These answers come from the same measured monthly climate record shown on this page.
When is the best time to visit San Antonio?
April is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 27.1°C and 48 mm of rain.
What is the hottest month in San Antonio?
August is hottest in this record, with a typical daytime high of 35.5°C and a night-time low of 23.5°C.
Which month has the least rain?
February has the lowest monthly rainfall total at 40 mm.
Is this a weather forecast?
No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.
Month by month
See how the weather
changes through the year.
The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 17.8°C | 4.5°C | 52 mm | 5.2 | 10 h 27 | 56 | Good coverage |
| February | 19.6°C | 6.3°C | 40 mm | 5.5 | 11 h 06 | 67 | Good coverage |
| March | 23.5°C | 10.4°C | 56 mm | 5.8 | 11 h 54 | 85 | Good coverage |
| April | 27.1°C | 14°C | 48 mm | 3.9 | 12 h 50 | 86 | Good coverage |
| May | 30.4°C | 18.8°C | 83 mm | 5.6 | 13 h 36 | 63 | Good coverage |
| June | 33.6°C | 22.3°C | 85 mm | 5.3 | 14 h 01 | 46 | Good coverage |
| July | 34.6°C | 23.3°C | 80 mm | 5.3 | 13 h 51 | 42 | Good coverage |
| August | 35.5°C | 23.5°C | 62 mm | 3.6 | 13 h 12 | 42 | Good coverage |
| September | 32.2°C | 20.5°C | 110 mm | 6.6 | 12 h 18 | 49 | Good coverage |
| October | 27.3°C | 14.9°C | 115 mm | 5.7 | 11 h 24 | 75 | Good coverage |
| November | 22.2°C | 9.2°C | 59 mm | 4.7 | 10 h 38 | 79 | Good coverage |
| December | 17.8°C | 4.4°C | 44 mm | 5.3 | 10 h 16 | 57 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 30.0°C30 Jan 2013 | -10.0°C17 Jan 2024 | 104 mm25 Jan 2012 | 126 mm2007 · driest 0 mm in 2021 | 23 |
| February | 32.8°C26 Feb 2008 | -12.8°C16 Feb 2021 | 50 mm4 Feb 2012 | 143 mm2012 · driest 0 mm in 2021 | 23 |
| March | 35.0°C15 Mar 2008 | -6.1°C4 Mar 2002 | 54 mm12 Mar 2007 | 202 mm2007 · driest 0 mm in 2021 | 22 |
| April | 36.7°C10 Apr 2009 | 0.6°C2 Apr 2019 | 56 mm24 Apr 2001 | 130 mm2004 · driest 0 mm in 2021 | 22 |
| May | 37.8°C26 May 2024 | 5.0°C4 May 2013 | 125 mm25 May 2013 | 226 mm2012 · driest 0 mm in 2020 | 23 |
| June | 42.2°C16 Jun 1998 | 11.7°C19 Jun 2004 | 128 mm24 Jun 2001 | 259 mm2004 · driest 4 mm in 2008 | 22 |
| July | 41.7°C12 Jul 2020 | 13.9°C25 Jul 2019 | 182 mm2 Jul 2002 | 428 mm2002 · driest 0 mm in 2020 | 21 |
| August | 43.3°C29 Aug 2011 | 16.1°C31 Aug 2017 | 149 mm17 Aug 2007 | 238 mm2001 · driest 0 mm in 2020 | 22 |
| September | 43.3°C6 Sep 2000 | 7.2°C30 Sep 2020 | 148 mm8 Sep 2010 | 381 mm2018 · driest 0 mm in 2020 | 24 |
| October | 36.1°C12 Oct 2020 | -1.1°C29 Oct 2017 | 364 mm18 Oct 1998 | 493 mm1998 · driest 0 mm in 2022 | 23 |
| November | 32.2°C28 Nov 2005 | -5.6°C14 Nov 2018 | 112 mm16 Nov 2001 | 296 mm2004 · driest 0 mm in 2021 | 23 |
| December | 28.9°C11 Dec 2021 | -6.1°C13 Dec 1997 | 54 mm21 Dec 1997 | 94 mm2018 · driest 0 mm in 2023 | 22 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 3 | <1 | 7 | 2 |
| February | 6 | <1 | 4 | 1 |
| March | 14 | 2 | <1 | 2 |
| April | 23 | 7 | 0 | 1 |
| May | 29 | 19 | 0 | 2 |
| June | 30 | 28 | 0 | 2 |
| July | 31 | 30 | 0 | 2 |
| August | 31 | 30 | 0 | 1 |
| September | 29 | 24 | 0 | 3 |
| October | 24 | 11 | <1 | 3 |
| November | 12 | <1 | 2 | 2 |
| December | 3 | 0 | 8 | 1 |
| Month | Dry days reaching 20°C | Wet days | Days with heavy rain | Weeks with 3+ wet days | Typical high by year |
|---|---|---|---|---|---|
| January | 39% | 16% | 5% | 15% | 15.1–20.5°C |
| February | 48% | 19% | 4% | 18% | 17.0–23.4°C |
| March | 67% | 19% | 6% | 15% | 21.7–25.6°C |
| April | 84% | 13% | 5% | 10% | 25.5–29.2°C |
| May | 82% | 18% | 7% | 17% | 28.9–32.1°C |
| June | 84% | 17% | 7% | 20% | 31.6–35.9°C |
| July | 82% | 17% | 7% | 14% | 32.1–37.2°C |
| August | 88% | 11% | 5% | 9% | 33.7–37.0°C |
| September | 79% | 21% | 10% | 23% | 30.3–34.9°C |
| October | 79% | 18% | 9% | 20% | 25.9–28.7°C |
| November | 63% | 16% | 5% | 15% | 19.3–24.6°C |
| December | 36% | 17% | 4% | 13% | 15.8–20.4°C |
A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.
The evidence behind this page
Where these figures
come from.
- Place identity
- GeoNames 4726206
- NOAA station
- USC00417947 · SAN ANTONIO INCARNATE WORD
- Station distance
- 5.5 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 18 usable years
- Daylight
- Calculated from latitude 29.42°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for San Antonio is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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