San Antonio Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Antonio.
Climate overview of San Antonio
The climate in San Antonio, Cayo, Belize, is remarkably consistent, with temperatures year-round averaging 31°C (88°F). The warmest month is April at 34°C (93°F), and the coolest is January at 28°C (82°F).
Rainfall is high, totalling around 1204 mm (47 in) per year. September is the wettest month and February the driest. April is the sunniest month, averaging 8.5 hours of sunshine per day.
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
In San Antonio temperatures are generally consistent throughout the year. Average maximum daytime temperatures range from a very warm 34°C (93°F) in April, the warmest time of the year, to a comfortable 28°C (82°F) during cooler months like January.
At night, you can expect temperatures ranging from 24°C (75°F) in April to around 18°C (64°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Antonio
San Antonio experiences significant rainfall throughout the year, averaging 1204 mm (47 in) of precipitation annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives heavy rainfall, averaging 178 mm (7 in) of precipitation, recorded across 16 rainy days. In contrast, the driest month February brings less rainfall, with 40 mm (1.6 in) over 9 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
Seasonal changes in sunshine hours are quite dramatic in San Antonio. While April receives considerable daily sunshine with up to 8.5 hours, December marks the darkest time of the year, where sunshine is scarce with only 5.0 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit San Antonio
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January and December
- Warmest weather: April, May, June, July, August and September
- Most sunshine: March, April and May
- Fewest rainy days: March and April
Frequently asked questions about the climate in San Antonio
What is the best time to visit San Antonio?
January and December typically offer the most optimal weather in San Antonio. In contrast, April, May, June, July, August and September tend to have less optimal conditions.
What temperatures can I expect in San Antonio?
Daytime highs range from 28°C (82°F) in January to 34°C (93°F) in April. Nighttime lows range from 18°C (64°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does San Antonio get?
Annual rainfall is around 1204 mm (47 in). September is the wettest month with 178 mm (7 in), while February is the driest with 40 mm (1.6 in).
How sunny is San Antonio?
San Antonio receives around 2,389 hours of sunshine per year. April is the sunniest month with 256 hours, while December is the cloudiest with just 151 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 this month
Where to go in August - average daytime high across popular destinations.
San Ignacio
34°C (93°F) Belize City
31°C (88°F) Maya Beach30°C (86°F) Hopkins31°C (88°F) Dangriga31°C (88°F) Caye Caulker30°C (86°F) Placencia Village31°C (88°F) San Pedro30°C (86°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Cockscomb basin wildlife sanctuary
The Cockscomb Basin Wildlife Sanctuary is located in the south of Belize and is said to be the best place on earth to encounter a jaguar. Something you migh want to add to your bucket list.
Dive and feel like Robinson Crusoe at Glover’s Reef
Belize has an amazing number of beautiful small islands. Many of these islands are unaffordable for the average backpacker. Glovers Reef is an exception to this.
River Tube in Belize
The best time to visit Belize and to River Tube is from December to mid-April, this is the dry season. If you like to avoid the crowds we recommend visiting May and early June.
The Cayo District is Belize's most adventurous region
This area has all the perfect ingredients for many different adventure activities. We are sure that the dramatic mix of this beautiful scenery made by Mother nature will capture your heart.