San Antonio Weather in May
San Antonio in May sees pleasant temperatures, with highs around 19°C (66°F) and overnight lows of 11°C (52°F). With the rainy season in full effect, expect around 308 mm (12 in) of rainfall and regular showers throughout the month.
Rainfall in San Antonio in May
San Antonio is in the rainy season in May, with rain on around 15 days and an average of 308 mm (12 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in San Antonio in May
Expect highs of 19°C (66°F) in San Antonio in May, with nights dropping to around 11°C (52°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in San Antonio in May
The area experiences a moderate amount of sunshine, with approximately 165 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.
Wind Speed in San Antonio in May
Average wind conditions reach () in May. This results in mostly calm, still weather and is ideal for most activities. While this is an average, conditions can vary slightly from completely calm to occasionally breezy days.If you're looking for dry conditions and comfortable temperatures, May may not be the ideal month to visit San Antonio. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ecuador, check out our San Antonio's climate page.
San Antonio Temperature in May
Min Temperature
11°C (52°F)
Max Temperature
19°C (66°F)
Chance of Rain
49%
Precipitation
308 mm (12 in)
Rainy days
15 days
Humidity
80% *
Windspeed
() *
Sunshine
165 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in San Antonio typically stay consistent throughout May, with daily highs averaging around 19°C (66°F). Nights are cool, with lows around 11°C (52°F).
Average temperatures in May
Historical weather for San Antonio in May
Browse day-by-day weather records for San Antonio spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Antonio historical weather extremes in May
Based on weather observations in San Antonio between 2004 and 2026, these are the recorded extremes during May.
- San Antonio recorded its highest May temperature of 28°C (82°F) on May 20, 2026.
- San Antonio experienced its chilliest May day on May 28, 2008, reaching only 15°C (59°F).
- Nighttime temperatures dropped to 4°C (39°F) on May 21, 2012, marking the coldest May night on record.
Best Places in Ecuador in May
Find out more about the weather in Ecuador and which places have the best travel conditions in this month. See all of Ecuador in May →
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What to Wear in San Antonio in May
For San Antonio in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in San Antonio in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ecuador, check out our San Antonio's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full San Antonio climate overview or explore weather in Ecuador.
