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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 savanna climate (Aw). Temperatures typically range between 14 °C (58 °F) and 20 °C (68 °F) through the year, but rarely can drop to 2 °C (36 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 1700 mm (66.9 inches) and receives 172 rainy days on the 1 mm (0.04 inches) threshold annually. La Union enjoys an average of 3542 hours of sunshine throughout the year, and daylight varies from 11 hours 0 minutes to 13 hours 14 minutes per day.

Monthly average temperatures in La Union, Mexico

The warmest months in La Union are March, April and May, with daily mean temperatures ranging from 19 to 20 °C (66 - 68 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 14 to 16 °C (58 - 61 °F) throughout the day. On average each year, La Union experiences 117 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
Maximum27°C
(81°F)		28°C
(83°F)		31°C
(88°F)		31°C
(88°F)		30°C
(86°F)		31°C
(87°F)		26°C
(80°F)		27°C
(80°F)		27°C
(80°F)		27°C
(81°F)		26°C
(79°F)		26°C
(79°F)
Mean maximum26°C
(79°F)		28°C
(82°F)		30°C
(86°F)		30°C
(87°F)		29°C
(85°F)		27°C
(81°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		25°C
(78°F)		25°C
(78°F)
Average high22°C
(73°F)		25°C
(76°F)		27°C
(80°F)		27°C
(81°F)		26°C
(80°F)		24°C
(75°F)		24°C
(75°F)		23°C
(75°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		22°C
(73°F)
Daily mean14°C
(58°F)		16°C
(62°F)		19°C
(66°F)		20°C
(68°F)		20°C
(68°F)		18°C
(65°F)		18°C
(65°F)		18°C
(65°F)		18°C
(65°F)		18°C
(64°F)		16°C
(61°F)		14°C
(58°F)
Average low7°C
(46°F)		9°C
(48°F)		11°C
(52°F)		12°C
(55°F)		13°C
(56°F)		14°C
(57°F)		13°C
(56°F)		14°C
(57°F)		14°C
(57°F)		13°C
(55°F)		9°C
(49°F)		7°C
(46°F)
Mean minimum4°C
(39°F)		6°C
(43°F)		8°C
(46°F)		9°C
(49°F)		10°C
(51°F)		11°C
(52°F)		10°C
(51°F)		11°C
(52°F)		11°C
(52°F)		9°C
(49°F)		6°C
(43°F)		4°C
(40°F)
Minimum3°C
(37°F)		5°C
(41°F)		7°C
(44°F)		8°C
(46°F)		9°C
(48°F)		10°C
(51°F)		9°C
(48°F)		10°C
(51°F)		10°C
(51°F)		7°C
(45°F)		3°C
(38°F)		2°C
(36°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, August and September, with an average of 28 rainy days and 343 mm (13.5 inches) of precipitation per month. The driest months in La Union are January, February and December. On average, 5 mm (0.2 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)6 (0.2)4 (0.2)15 (0.6)39 (1.5)160 (6.3)369 (14.5)228 (9.0)323 (12.7)337 (13.3)173 (6.8)39 (1.5)5 (0.2)
Average precipitation days (≥ 1 mm)113718262730292181

Monthly sunshine hours in La Union, Mexico

The sunniest months in La Union are March, April and May, when the sun shines an average of 10 hours 33 minutes a day. Least sunny months in La Union: January, February and September receive an average of 8 hours 50 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 hours240276318319333295311297278289285295
Mean daily daylight hours11h 7m11h 31m12h 2m12h 34m13h 1m13h 14m13h 7m12h 43m12h 12m11h 41m11h 13m11h 0m

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 14 - 15, 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 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)10121415141414141412108