nomadseason

Monthly climate in San Antonio, Belize

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Antonio features a tropical monsoon climate (Am). Temperatures typically range between 23 °C (73 °F) and 28 °C (82 °F) through the year, but rarely can drop to 13 °C (55 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 1333 mm (52.5 inches) and receives 246 rainy days on the 1 mm (0.04 inches) threshold annually. San Antonio enjoys an average of 3448 hours of sunshine throughout the year, and daylight varies from 11 hours 9 minutes to 13 hours 4 minutes per day.

Monthly average temperatures in San Antonio, Belize

The warmest months in San Antonio are May, June and September, with daily mean temperatures ranging from 27 to 28 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 23 to 24 °C (73 - 76 °F) throughout the day. On average each year, San Antonio experiences 316 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in San Antonio. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum32°C
(90°F)		33°C
(92°F)		35°C
(95°F)		39°C
(103°F)		38°C
(101°F)		38°C
(100°F)		35°C
(95°F)		36°C
(97°F)		36°C
(97°F)		35°C
(95°F)		32°C
(90°F)		32°C
(89°F)
Mean maximum31°C
(88°F)		32°C
(90°F)		33°C
(92°F)		37°C
(99°F)		37°C
(99°F)		35°C
(95°F)		34°C
(93°F)		34°C
(94°F)		35°C
(95°F)		34°C
(93°F)		31°C
(89°F)		31°C
(88°F)
Average high27°C
(81°F)		29°C
(84°F)		30°C
(86°F)		33°C
(91°F)		33°C
(92°F)		32°C
(90°F)		32°C
(89°F)		32°C
(90°F)		32°C
(90°F)		31°C
(87°F)		29°C
(84°F)		27°C
(82°F)
Daily mean23°C
(73°F)		24°C
(76°F)		25°C
(77°F)		27°C
(81°F)		28°C
(82°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		26°C
(79°F)		24°C
(76°F)		23°C
(74°F)
Average low20°C
(68°F)		20°C
(69°F)		21°C
(70°F)		23°C
(73°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		23°C
(75°F)		23°C
(75°F)		23°C
(74°F)		21°C
(70°F)		20°C
(68°F)
Mean minimum16°C
(60°F)		16°C
(60°F)		17°C
(64°F)		19°C
(67°F)		22°C
(71°F)		23°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		21°C
(70°F)		18°C
(65°F)		15°C
(60°F)
Minimum14°C
(58°F)		13°C
(55°F)		16°C
(61°F)		16°C
(61°F)		21°C
(70°F)		22°C
(71°F)		22°C
(71°F)		21°C
(71°F)		21°C
(71°F)		20°C
(68°F)		17°C
(62°F)		14°C
(57°F)

Compare climate in San Antonio with other places

Compare temperature, precipitation, sunshine, UV index in San Antonio, Belize with other places around the world.

Monthly average precipitation in San Antonio, Belize

San Antonio usually has the most precipitation in June, September and October, with an average of 25 rainy days and 177 mm (7.0 inches) of precipitation per month. The driest months in San Antonio are February, March and April. On average, 57 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Antonio. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)68 (2.7)50 (2.0)65 (2.5)57 (2.3)106 (4.2)172 (6.8)122 (4.8)130 (5.1)139 (5.5)219 (8.6)138 (5.5)65 (2.6)
Average precipitation days (≥ 1 mm)141616122126272726241918

Monthly sunshine hours in San Antonio, Belize

The sunniest months in San Antonio are March, April and May, when the sun shines an average of 10 hours 16 minutes a day. Least sunny months in San Antonio: January, February and June receive an average of 8 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Antonio. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours219266310313320273304307295280275281
Mean daily daylight hours11h 16m11h 36m12h 2m12h 30m12h 52m13h 4m12h 57m12h 37m12h 11m11h 44m11h 21m11h 9m

Solar UV radiation in San Antonio, Belize

San Antonio experiences the highest level of ultraviolet (UV) radiation in April, May and August, when the maximum UV index can reach values of 14 - 14, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly San Antonio UV Index data.

Average daily maximum UV levels by month for San Antonio. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)10121414141313141312109