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Monthly climate in La Union, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification La Union features a tropical monsoon climate (Am). Temperatures typically range between 24 °C (75 °F) and 29 °C (85 °F) through the year, but rarely can drop to 11 °C (53 °F) or can rise to as high as 41 °C (107 °F). The average annual precipitation amounts to about 1135 mm (44.7 inches) and receives 204 rainy days on the 1 mm (0.04 inches) threshold annually. La Union enjoys an average of 3456 hours of sunshine throughout the year, and daylight varies from 11 hours 3 minutes to 13 hours 10 minutes per day.

Monthly average temperatures in La Union, Mexico

The warmest months in La Union are April, May and August, with daily mean temperatures ranging from 28 to 29 °C (83 - 85 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 24 to 25 °C (75 - 77 °F) throughout the day. On average each year, La Union experiences 326 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 La Union. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum37°C
(99°F)		36°C
(98°F)		36°C
(98°F)		41°C
(107°F)		39°C
(103°F)		38°C
(101°F)		37°C
(98°F)		37°C
(99°F)		38°C
(100°F)		36°C
(97°F)		33°C
(92°F)		33°C
(92°F)
Mean maximum33°C
(92°F)		34°C
(94°F)		36°C
(97°F)		39°C
(103°F)		39°C
(102°F)		35°C
(95°F)		35°C
(96°F)		36°C
(96°F)		35°C
(96°F)		35°C
(95°F)		32°C
(90°F)		32°C
(90°F)
Average high29°C
(84°F)		31°C
(88°F)		33°C
(91°F)		35°C
(96°F)		35°C
(95°F)		33°C
(91°F)		33°C
(92°F)		33°C
(92°F)		33°C
(92°F)		32°C
(89°F)		30°C
(86°F)		29°C
(85°F)
Daily mean24°C
(75°F)		25°C
(78°F)		26°C
(80°F)		28°C
(83°F)		29°C
(85°F)		28°C
(83°F)		28°C
(82°F)		28°C
(83°F)		28°C
(82°F)		27°C
(80°F)		25°C
(77°F)		24°C
(75°F)
Average low20°C
(68°F)		21°C
(70°F)		21°C
(71°F)		23°C
(74°F)		25°C
(76°F)		25°C
(77°F)		24°C
(76°F)		24°C
(76°F)		24°C
(75°F)		23°C
(74°F)		21°C
(70°F)		20°C
(68°F)
Mean minimum15°C
(58°F)		15°C
(59°F)		17°C
(63°F)		19°C
(67°F)		22°C
(72°F)		23°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		20°C
(69°F)		16°C
(62°F)		13°C
(55°F)
Minimum14°C
(57°F)		11°C
(53°F)		16°C
(60°F)		17°C
(63°F)		19°C
(67°F)		22°C
(72°F)		21°C
(71°F)		21°C
(70°F)		22°C
(72°F)		18°C
(64°F)		15°C
(59°F)		12°C
(53°F)

Compare climate in La Union with other places

Compare temperature, precipitation, sunshine, UV index in La Union, Mexico with other places around the world.

Monthly average precipitation in La Union, Mexico

La Union usually has the most precipitation in June, September and October, with an average of 25 rainy days and 187 mm (7.4 inches) of precipitation per month. The driest months in La Union are January, February and March. On average, 32 mm (1.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in La Union. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)43 (1.7)29 (1.2)23 (0.9)46 (1.8)75 (3.0)227 (8.9)113 (4.4)125 (4.9)154 (6.1)180 (7.1)73 (2.9)46 (1.8)
Average precipitation days (≥ 1 mm)1110771825232426241514

Monthly sunshine hours in La Union, Mexico

The sunniest months in La Union are March, May and August, when the sun shines an average of 10 hours 16 minutes a day. Least sunny months in La Union: January, February and October receive an average of 8 hours 21 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in La Union. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours220269316312324274313315288269270280
Mean daily daylight hours11h 10m11h 33m12h 2m12h 32m12h 58m13h 10m13h 3m12h 41m12h 12m11h 42m11h 16m11h 3m

Solar UV radiation in La Union, Mexico

La Union experiences the highest level of ultraviolet (UV) radiation in April, August and September, when the maximum UV index can reach values of 13 - 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 9. For more detailed information, check out our hourly La Union UV Index data.

Average daily maximum UV levels by month for La Union. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)911131413131313131298