What May feels like in San Antonio
May is late spring in San Antonio. Expect proper heat in the afternoon — slow down between noon and four. Evenings bring a clear drop in temperature, and nights stay warm. The air carries some moisture, so hot spells feel a little sticky.
Rain in San Antonio in May
Dry days are the exception, with rain on about one day in 2. Rainy days are intense, averaging about 10.5 mm (0.4 in) — downpours rather than drizzle. That is close to San Antonio's typical rain per wet day for the whole year (about 8.5 mm). May is San Antonio's wettest month of the year.
Daylight and sunshine in May
In mid-May, sunrise is at about 6:42 am and sunset at about 8:18 pm (local time) — 13 h 36 min of daylight. Days are getting longer: 45 min more daylight than in mid-April. Measured sunshine covers about 75% of the daylight — there are plenty of bright spells.
How May compares to the rest of the year
May is the 5th warmest month of the year in San Antonio. Afternoons run 3.1°C (5.6°F) warmer than in April, with 53 mm more rain. Temperatures keep climbing into June. The next month's average high: 33.9°C (93°F).
Who May suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
Tips for visiting San Antonio in May
Versatile Layers
Mornings and evenings are cooler than midday, so dress in layers.
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Sun Protection
Protect yourself from strong sun: hat, SPF and plenty of water.
Quick questions
How warm is San Antonio in May?
Expect around 30.5°C (86.9°F) in the afternoon and 20.1°C (68.2°F) at night, which most visitors would call hot.
Does it rain a lot in San Antonio in May?
Yes, fairly — rain falls about one day in 2 and totals about 137 mm, so an umbrella is worth carrying.
What should I wear in San Antonio in May?
The numbers point to versatile layers, rain protection and sun protection. There is little need to change for the evening.
Is May or June better for visiting San Antonio?
May scores better on our climate ranking (#8 of 12 vs #11), rated Good against Fair. June is warmer and has fewer rainy days.