Late spring · Weather & things to do
San Antonio in May
The year's rain peaks now, with about 3.9 in (100 mm) falling in San Antonio, alongside highs near 89°F (32°C) and lows of 67°F (19°C).
Our comfort score puts it mid-table at 63/100, 9th of 12.
- Avg high
- 89°F (32°C)
- Avg low
- 67°F (19°C)
- Rain
- 3.9 in (100 mm)
- Humidity
- 68%
- Cloud cover
- 60%
- Daylight
- ~13 h 28 min
- Comfort score
- 63/100 · Good
What May feels like
Heat sets the pace, with highs around 89°F (32°C). Get out early and keep the hottest hours for somewhere cool.
There's a big swing between day and night, about 13°C (23°F), so mornings and evenings feel much cooler than the afternoon.
Showers are part of the month, adding up to about 3.9 in (100 mm).
Plan around May
May sits mid-table; the best months are October – March.
- Start of the wettest three-month stretch (May – July), which brings about 9.5 in (242 mm) in total.
- Comfort slips from 81/100 in April to 63/100.
- Our Texas BBQ Trail route recommends Oct – Apr, so May falls outside its suggested window.
- Our San Antonio & the Texas Hill Country route is planned for Late Nov – Dec, a window set by the holiday season rather than the weather — May falls outside it.
What to pack for May
- Light, breathable clotheshighs average 89°F
- Sunscreen, sunglasses and a hatstrong sun this month
- Refillable water bottleeasy to dehydrate in the heat
- A warm layer for eveningslows near 67°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in San Antonio in May
Start early and take shelter at midday: the picks below pair morning outings with places to cool off.
Sternewirth
Hotel Emma's bar in the old brewhouse, with intimate booths in vintage tanks.
Why now A break from 89°F afternoons.
San Antonio Museum of Art
Former Lone Star brewery housing strong Latin American and antiquities collections.
Why now Somewhere to sit out the hottest hours.
Menger Bar
Dark-paneled 1887 bar in the Menger Hotel beside the Alamo, modeled on the House of Lords pub in London.
San Antonio River Walk
Below-street paths along the river; take a GO RIO boat for an overview.
Why now May scores 63/100 for comfort, good conditions for being outside.
River Walk
Stone-lined walkways along the San Antonio River, with cypress trees and bridges strung with lights through the holidays.
Why now Highs near 89°F and 3.9 in of monthly rain make this an easy outdoor pick.
San Fernando Cathedral
Cathedral founded in 1738 on Main Plaza, whose facade hosts San Antonio | The Saga, a free light projection on the city's history.
Nearby in May
- Texas Hill Country in May~58 mi · highs 85°F, 4.3 in rain · 2°C (4°F) cooler by day, about as wet
- Austin in May~74 mi · highs 87°F, 4.4 in rain · 1°C (2°F) cooler by day, about as wet
- Downtown Houston in May~189 mi · highs 87°F, 4.7 in rain · 1°C (3°F) cooler by day, wetter
- Dallas in May~252 mi · highs 84°F, 4.6 in rain · 3°C (5°F) cooler by day, wetter
These averages also cover Downtown San Antonio & Hemisfair and Pearl & Museum Reach.
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
San Antonio in May: quick answers
Is May a good time to visit San Antonio?
It's middling, scoring 63/100. The best months are October – March, at up to 92. Expect highs of 89°F (32°C) and 3.9 in (100 mm) of rain. Our Texas BBQ Trail route recommends Oct – Apr, so May is outside its suggested window.
How hot is San Antonio in May?
Average highs are 89°F (32°C) and average lows 67°F (19°C), making it the 5th-warmest month by daytime highs.
Does it rain a lot in San Antonio in May?
Some: about 3.9 in (100 mm) of rain falls across May on average, the wettest month of the year. The annual total is about 30.7 in (779 mm).
What should I pack for San Antonio in May?
Bring light, breathable clothes (highs average 89°F), sunscreen, sunglasses and a hat (strong sun this month), refillable water bottle (easy to dehydrate in the heat), a warm layer for evenings (lows near 67°F) and packable rain jacket or umbrella (a shower or two is likely).
More on San Antonio
Planning San Antonio in May?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.