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Discover South America's top 10 alternative cities! From Valparaíso's vibrant streets to La Paz's high-altitude charm and Medellín's innovative spirit.
San Antonio Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Antonio.
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Climate overview of San Antonio
San Antonio, Ecuador, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 19°C (66°F), peaking in August at 20°C (68°F) and dipping in December to 19°C (66°F).
The city receives considerable rainfall, with around 3431 mm (135 in) annually. April is the wettest month. The most sunshine falls in August, with an average of 8.6 hours of daily sunshine.
San Antonio Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Antonio - and find the best time to visit.
Monthly Temperature in San Antonio
With minimal seasonal shifts, San Antonio experiences a constant climate year-round. Typically, average maximum daytime temperatures range from a pleasant 20°C (68°F) in August to a pleasant 19°C (66°F) in the coolest month, December.
Nights vary from 11°C (52°F) in August to around 10°C (50°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Antonio
San Antonio has a notably wet climate with abundant precipitation, recording 3431 mm (135 in) of rainfall per year. The climate in San Antonio shows significant variation throughout the year. Expect heavy rainfall in April, the wettest month, with an average of 383 mm (15 in) of precipitation over 18 rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 140 mm (5.5 in) of rainfall over 5 rainy days. For more details, please visit our San Antonio Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in San Antonio
For those who appreciate different seasons, San Antonio serves as an ideal destination. Expect longer, more sun-filled days in August with an average of 8.6 hours of sunshine daily, and embrace the darker days in March, offering only 4.1 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Quito, Ecuador (15 KM, 9 Miles).
Daily hours of sunshine
Data from: Quito, Ecuador (15 KM, 9 Miles).
Humidity in San Antonio by Month
The relative humidity is high throughout the year in San Antonio.
The city experiences its highest humidity in April, reaching 84%. In August, the humidity drops to its lowest level at 69%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Quito, Ecuador (15 KM, 9 Miles).
Wind Speed in San Antonio
The average wind speed over the year ranges from () to 1 m/s (2 knots). It is lower in January, February, March, April, May, June, September, October, November and December and higher in July and August. What does this mean?
The mean monthly wind speed over the year (meters per second)
Data from: Quito, Ecuador (15 KM, 9 Miles).
Best Time to Visit San Antonio
For comfortable weather, consider visiting San Antonio in July and August. Conditions are usually least favourable in January, February, March, April, May, October, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very wet
Feb
very wet
Mar
very wet
Apr
very wet
May
very wet
Jun
mixed
Jul
very good
Aug
very good
Sep
mixed
Oct
very wet
Nov
very wet
Dec
very wet
- Best overall: July and August
- Warmest weather: all year round
- Most sunshine: July and August
- Fewest rainy days: July and August
Frequently asked questions about the climate in San Antonio
What is the best time to visit San Antonio?
July and August typically offer the most optimal weather in San Antonio. In contrast, January, February, March, April, May, October, November and December tend to have less optimal conditions.
What temperatures can I expect in San Antonio?
Daytime highs range from 19°C (66°F) in December to 20°C (68°F) in August. Nighttime lows range from 10°C (50°F) to 11°C (52°F). Temperatures stay relatively stable year-round.
How much rain does San Antonio get?
Annual rainfall is around 3431 mm (135 in). April is the wettest month with 383 mm (15 in), while August is the driest with 140 mm (5.5 in).
How sunny is San Antonio?
San Antonio receives around 2,235 hours of sunshine per year. August is the sunniest month with 257 hours, while March is the cloudiest with just 122 hours. Overall, San Antonio enjoys abundant sunshine.
San Antonio 3-Day Forecast
San Antonio on the map
San Antonio is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Guayaquil
29°C (84°F) Montañita25°C (77°F) Puerto Ayora26°C (79°F) Salinas23°C (73°F) Puerto Baquerizo Moreno
23°C (73°F) Quito
19°C (66°F) Baños17°C (63°F) Cuenca15°C (59°F) Bucket list
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