Best time to visit San Antonio
USA · Americas · Subtropical climate · Northern hemisphere
February – April, October – December
February – April, October – December is the canonical best window — average daytime highs of 24 °C and 373 mm of rain across those months. The wettest month is May (105 mm) and the driest is February (46 mm).
6 months · Spring / Autumn / Winter
Good · 79/100
Warm conditions with moderate annual rainfall (822 mm); the canonical best window is February – April, October – December.
- Recommended window
- 6 months
- Canonical best months
- Climate zone
- Subtropical
- NASA POWER normals
- Dominant season
- Spring
- Derived
- Climate score
- Good · 79/100
- Real field
- Typical stay
- 3 days
- Real field
Climate year
● recommended window · fixed scales −15–40 °C · 0–800 mm · 0–31 rain days · use ← → to change month
February
Winter · In recommended window
Favourable month (R1–R7) inside the canonical best-time window
- High / Low
- 20.1° / 7.2°C
- Mean
- 12.6°C
- Rain
- 45.7 mm
- Rain days (≥1 mm)
- 0.2
- Daylight
- 11.1 h
When to go
Go in February – April, October – December
February – April, October – December is the canonical best window — average daytime highs of 24 °C and 373 mm of rain across those months. The wettest month is May (105 mm) and the driest is February (46 mm).
Warm conditions with moderate annual rainfall (822 mm); the canonical best window is February – April, October – December.
Read the full San Antonio destination guide- Best
- Feb · Mar · Apr · Oct · Nov · Dec6/12
- Good
- —0/12
- Mixed
- Jan · May · Jun · Jul · Aug · Sep6/12
- Avoid
- —0/12
Distribution across the twelve months
Why these months?
San Antonio's canonical best-time window is February – April, October – December — 6 months of the year. That window is derived from the R1–R7 classification of NASA POWER climate normals, and it is the primary signal behind the verdicts above.
Inside the window, NASA POWER climate normals for a subtropical climate in the northern hemisphere read Mild / Warm with Low precipitation — 1991–2020 monthly averages, not a forecast. Outside it, month-by- month verdicts come from the R1–R7 climate classification over the same dataset.
The other 6 months sit outside the window. No month reads as least favourable on the pattern.
Signals — Best: R1–R7 favourable months · Good / Mixed: R1–R7 workable · Avoid: R1–R7 challenging · climate normals: NASA POWER 1991–2020
Read a single month
● marks a month inside the recommended window · use ← → to change month
February
Winter · In recommended window
- Temperature
- 20.1° / 7.2°C
- Precipitation
- 45.7 mm
- Rain days (≥1 mm)
- 0.2
- Daylight
- 11.1 h
Avg high 20.1°C / avg low 7.2°C · 45.7 mm precipitation over 0.2 days with ≥1 mm rain.
Temperature, precipitation and rain days are 1991–2020 NASA POWER climate normals; daylight hours are astronomical. The verdict comes from the R1–R7 climate classification.
All twelve months
Twelve months of NASA POWER climate normals for San Antonio (1991–2020 average), side by side with the travel verdict: whether a month is Favourable, Workable or Challenging (R1–R7 classification), and whether it falls inside the canonical best-time window. Historical climate normals — not a forecast.
| Month | Season | Temperature | Precipitation | Month readout | Verdict |
|---|---|---|---|---|---|
| January | Winter | 17.3° / 5.1°C | 50.6 mm · 0.2 rain days | Avg high 17.3°C / avg low 5.1°C · 50.6 mm precipitation over 0.2 days with ≥1 mm rain. | Mixed |
| Februaryinside the recommended window; | Winter | 20.1° / 7.2°C | 45.7 mm · 0.2 rain days | Avg high 20.1°C / avg low 7.2°C · 45.7 mm precipitation over 0.2 days with ≥1 mm rain. | Best |
| Marchinside the recommended window; | Spring | 24.0° / 10.7°C | 62.8 mm · 0.3 rain days | Avg high 24.0°C / avg low 10.7°C · 62.8 mm precipitation over 0.3 days with ≥1 mm rain. | Best |
| Aprilinside the recommended window; | Spring | 28.4° / 14.6°C | 66.5 mm · 0.3 rain days | Avg high 28.4°C / avg low 14.6°C · 66.5 mm precipitation over 0.3 days with ≥1 mm rain. | Best |
| May | Spring | 31.6° / 19.1°C | 104.9 mm · 0.4 rain days | Avg high 31.6°C / avg low 19.1°C · 104.9 mm precipitation over 0.4 days with ≥1 mm rain. | Mixed |
| June | Summer | 34.3° / 22.3°C | 85.4 mm · 0.4 rain days | Avg high 34.3°C / avg low 22.3°C · 85.4 mm precipitation over 0.4 days with ≥1 mm rain. | Mixed |
| July | Summer | 35.5° / 23.3°C | 57.7 mm · 0.3 rain days | Avg high 35.5°C / avg low 23.3°C · 57.7 mm precipitation over 0.3 days with ≥1 mm rain. | Mixed |
| August | Summer | 35.9° / 23.8°C | 64.9 mm · 0.3 rain days | Avg high 35.9°C / avg low 23.8°C · 64.9 mm precipitation over 0.3 days with ≥1 mm rain. | Mixed |
| September | Autumn | 32.4° / 20.9°C | 86.1 mm · 0.4 rain days | Avg high 32.4°C / avg low 20.9°C · 86.1 mm precipitation over 0.4 days with ≥1 mm rain. | Mixed |
| Octoberinside the recommended window; | Autumn | 28.3° / 15.9°C | 87.5 mm · 0.3 rain days | Avg high 28.3°C / avg low 15.9°C · 87.5 mm precipitation over 0.3 days with ≥1 mm rain. | Best |
| Novemberinside the recommended window; | Autumn | 22.3° / 10.4°C | 55.2 mm · 0.2 rain days | Avg high 22.3°C / avg low 10.4°C · 55.2 mm precipitation over 0.2 days with ≥1 mm rain. | Best |
| Decemberinside the recommended window; | Winter | 18.1° / 6.2°C | 54.9 mm · 0.2 rain days | Avg high 18.1°C / avg low 6.2°C · 54.9 mm precipitation over 0.2 days with ≥1 mm rain. | Best |
● marks a month inside the canonical best-time window
- Best
- Favourable month (R1–R7) inside the canonical best-time window
- Good
- Workable month (R1–R7) — a viable alternative outside the stated window
- Mixed
- Transitional month — workable with a flexible plan
- Avoid
- Challenging month (R1–R7) — least favourable climate pattern
Method: temperature and precipitation are 1991–2020 climate normals (monthly means); verdicts combine the R1–R7 climate classification with the canonical best-time window. No daily forecast, crowd level or price index is claimed.
Climate data source: NASA POWER (NASA Langley Research Center) · Climatology / Daily / Monthly point APIs · 1991–2020 · UTC+00:00 daily boundary.
Season by season
The recommended window (February – April, October – December) runs through Spring and Autumn and Winter. Below, each season is read on two axes: the NASA POWER climate normals for San Antonio's 1991–2020 record, and how much of it sits inside the canonical best-time window.
Spring
Mar · Apr · May
Mild / Warm · Low / Moderate precipitation
Avg high 24.0°C / avg low 10.7°C · 62.8 mm precipitation over 0.3 days with ≥1 mm rain.
2 of 3 months inside the recommended window
Summer
Jun · Jul · Aug
Hot · Low precipitation
Avg high 34.3°C / avg low 22.3°C · 85.4 mm precipitation over 0.4 days with ≥1 mm rain.
Outside the recommended window
Autumn
Sep · Oct · Nov
Mild / Warm / Hot · Low precipitation
Avg high 32.4°C / avg low 20.9°C · 86.1 mm precipitation over 0.4 days with ≥1 mm rain.
2 of 3 months inside the recommended window
Winter
Jan · Feb · Dec
Mild · Low precipitation
Avg high 17.3°C / avg low 5.1°C · 50.6 mm precipitation over 0.2 days with ≥1 mm rain.
2 of 3 months inside the recommended window
Temperature and precipitation are 1991–2020 NASA POWER climate normals (qualitative buckets are derived from the monthly values); the season names follow the destination's hemisphere, and daylight hours are astronomical.
Trip shape
- Typical stay
- 3 days
- Daily budget
- 110 USD
- Currency
- USD $
- Time zone
- America/Chicago
- Airport
- SAT · San Antonio
- Travel style
- Cultural
- Region
- Americas
Frequently asked questions
What are the best months to visit San Antonio?
The best months to visit San Antonio are February – April, October – December, based on the R1–R7 classification of NASA POWER 1991–2020 climate normals. February – April, October – December is the canonical best window — average daytime highs of 24 °C and 373 mm of rain across those months. The wettest month is May (105 mm) and the driest is February (46 mm).
What is the weather like in San Antonio?
San Antonio is rated Good for climate, with a score of 79/100. Warm conditions with moderate annual rainfall (822 mm); the canonical best window is February – April, October – December.
How many days do you need in San Antonio?
We recommend 3 days in San Antonio, ideally placed inside the recommended window of February – April, October – December.
Plan a February trip to San Antonio
The recommended window is February – April, October – December. The planner opens with San Antonio prefilled — set your dates inside that window and build the route around it.
Plan around this window
Climate data source: NASA POWER (NASA Langley Research Center) · Climatology / Daily / Monthly point APIs · 1991–2020 · accessed 2026-09-13 · dataset nasa-power-canonical-production-v1.2-wave2