People think San Antonio is just hot. The bigger surprise is spring. May is the wettest month with 14 rain days, and storms roll in fast, so a packable rain shell earns its spot even when the forecast says 88°F (31°C).
San Antonio weather by month
Daily high and low (°F), and days with rainSee the numbers
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High | 63°F17°C | 70°F21°C | 79°F26°C | 82°F28°C | 88°F31°C | 95°F35°C | 95°F35°C | 99°F37°C | 93°F34°C | 86°F30°C | 75°F24°C | 68°F20°C |
| Low | 43°F6°C | 48°F9°C | 57°F14°C | 63°F17°C | 70°F21°C | 75°F24°C | 75°F24°C | 79°F26°C | 73°F23°C | 66°F19°C | 55°F13°C | 50°F10°C |
| Rain days | 8 | 5 | 9 | 12 | 14 | 11 | 10 | 5 | 5 | 5 | 8 | 7 |
Season by season
Winter
December–FebruaryMild by most standards. Highs of 63–70°F (17–21°C) and lows of 43–50°F (6–10°C), with 5 to 8 rain days a month. A light jacket covers the River Walk at night and the drive out to the missions.
Spring
March–MayWarm and stormy. Highs go from 79°F (26°C) in March to 88°F (31°C) in May, and rain days climb to 14 in May. Pack a rain shell and light layers, and check the forecast before a long day on the Mission Trail.
Summer
June–AugustHot. Highs of 95–99°F (35–37°C), with August the warmest at 99°F (37°C), and lows of 75–79°F (24–26°C) that give you little relief at night. See the Alamo and the missions early, then head down to the shaded River Walk or indoors by midday.
Fall
September–NovemberSeptember still hits 93°F (34°C), but it eases to 86°F (30°C) in October and 75°F (24°C) in November. Rain is light at 5 to 8 days a month. It's one of the best times to walk the city.
What to bring to San Antonio
0 of 21 packed- Hydro Flask 32 oz Travel Bottle with Flex Straw CapWater Bottles & Hydration
It fits the car's cupholder for the drive between missions and keeps water cold through a 99°F (37°C) day.
- Bearwind S40 Portable Handheld Turbo FanTech & Power
A hand fan helps in a summer line at the Alamo when there's no shade.
Spring storms come in fast, and this packs into its own pocket until you need it.
May brings 14 rain days, and a jacket that stuffs into a pocket rides along with no fuss.
- Bellroy Lite SlingBags & Luggage
Wallet, phone and a small water bottle in one strap keeps your hands free on the River Walk steps.
- Anker Nano Power Bank 5,000mAh (Built-In USB-C)Tech & Power
Maps and photos drain a phone fast on a mission day, and this plugs straight in.
- Epicka 70W Universal Travel AdapterTech & Power
Coming from abroad, its US setting fits Type A and B sockets and charges five devices at once.
Clothing
- Breathable T-shirts · 4August averages a 37°C high
- Shorts · 2
- Light long pants · 1
- Wide-brim sun hat · 1
- Light sweater · 1Dec–Jan lows of 6–10°C
Footwear
- Comfortable walking shoes · 1The River Walk and missions
- Sandals · 1
Gear
- Sunglasses · 1
- Compact umbrella · 1Fast spring storms
Health and toiletries
- SPF 50 sunscreen · 1
- Insect repellent · 1
- Electrolyte packetsJun–Sep heat
Documents and money
- ID or passport
Tech
- Phone charger and cable
What shoes should you pack for San Antonio?
Comfortable walking shoes with grip. The River Walk has uneven stone paths and steps down from street level, and the Mission Reach trail is long and exposed. Sandals are fine for the evening but not for a mission day.
What do people wear in San Antonio?
Casual. Shorts, T-shirts and sundresses are normal from April to October, and nobody blinks at boots and jeans. Restaurants and museums blast the air-con, so carry a light layer.
What plugs does San Antonio use?
The US uses Type A and B sockets at 120V. If your plugs aren't A or B, you need an adapter, and anything that isn't dual voltage needs a converter.
Tours and things to do in San Antonio
Packed and ready? Browse guided tours, day trips and tickets for San Antonio.
What should you leave at home for San Antonio?
Leave the heavy coat unless you're coming in a rare cold snap. Skip dark, heavy fabrics from May to September too. You'll want light colors and breathable cotton in 95°F (35°C) heat.
Packing for San Antonio: questions people ask
What should I wear in San Antonio in summer?
Light, breathable clothes, a hat and sunscreen. Highs run 95–99°F (35–37°C) from June to August, so plan outdoor sightseeing for the morning.
Does it rain a lot in San Antonio?
Mostly in spring. May has 14 rain days and April 12, while August to October drop to 5 a month.
Do I need a jacket in San Antonio in winter?
A light one. Winter highs are 63–70°F (17–21°C), but lows drop to 43°F (6°C) in January.
What shoes are best for the San Antonio River Walk?
Closed walking shoes with grip. The paths are stone, uneven in places, and there are stairs down from the street.
When is the best time to visit San Antonio?
October and November, or February and March. Highs sit at 70–86°F (21–30°C) and it's not too wet.
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