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Monthly climate in San Julian, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Julian features a humid subtropical climate (Cwa). Temperatures typically range between 15 °C (59 °F) and 23 °C (74 °F) through the year, but rarely can drop to 1 °C (34 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 912 mm (35.9 inches) and receives 103 rainy days on the 1 mm (0.04 inches) threshold annually. San Julian enjoys an average of 3635 hours of sunshine throughout the year, and daylight varies from 10 hours 51 minutes to 13 hours 22 minutes per day.

Monthly average temperatures in San Julian, Mexico

The warmest months in San Julian are April, May and June, with daily mean temperatures ranging from 22 to 23 °C (71 - 74 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 15 to 17 °C (59 - 62 °F) throughout the day. On average each year, San Julian experiences 180 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 Julian. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum28°C
(82°F)		29°C
(85°F)		33°C
(91°F)		33°C
(92°F)		35°C
(95°F)		35°C
(95°F)		31°C
(87°F)		29°C
(84°F)		29°C
(84°F)		29°C
(85°F)		29°C
(84°F)		27°C
(80°F)
Mean maximum26°C
(79°F)		28°C
(83°F)		31°C
(87°F)		32°C
(89°F)		33°C
(92°F)		32°C
(91°F)		28°C
(83°F)		28°C
(83°F)		27°C
(81°F)		28°C
(82°F)		27°C
(81°F)		25°C
(78°F)
Average high22°C
(72°F)		24°C
(76°F)		28°C
(82°F)		29°C
(85°F)		30°C
(86°F)		28°C
(82°F)		25°C
(77°F)		25°C
(78°F)		24°C
(76°F)		25°C
(77°F)		24°C
(76°F)		22°C
(72°F)
Daily mean15°C
(59°F)		17°C
(63°F)		20°C
(69°F)		22°C
(72°F)		23°C
(74°F)		22°C
(71°F)		20°C
(67°F)		20°C
(68°F)		19°C
(67°F)		19°C
(66°F)		17°C
(62°F)		15°C
(59°F)
Average low8°C
(47°F)		10°C
(50°F)		12°C
(54°F)		14°C
(57°F)		16°C
(60°F)		16°C
(62°F)		15°C
(59°F)		15°C
(59°F)		15°C
(59°F)		13°C
(56°F)		10°C
(51°F)		8°C
(47°F)
Mean minimum4°C
(39°F)		6°C
(43°F)		9°C
(48°F)		11°C
(51°F)		12°C
(54°F)		14°C
(58°F)		13°C
(56°F)		13°C
(56°F)		12°C
(55°F)		9°C
(49°F)		6°C
(44°F)		4°C
(40°F)
Minimum1°C
(35°F)		5°C
(41°F)		7°C
(45°F)		9°C
(48°F)		11°C
(53°F)		13°C
(55°F)		12°C
(54°F)		12°C
(54°F)		11°C
(51°F)		7°C
(44°F)		3°C
(38°F)		1°C
(34°F)

Compare climate in San Julian with other places

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

Monthly average precipitation in San Julian, Mexico

San Julian usually has the most precipitation in July, August and September, with an average of 20 rainy days and 197 mm (7.8 inches) of precipitation per month. The driest months in San Julian are March, April and December. On average, 6 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Julian. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)12 (0.5)13 (0.5)7 (0.3)3 (0.1)30 (1.2)156 (6.2)219 (8.6)178 (7.0)195 (7.7)71 (2.8)20 (0.8)7 (0.3)
Average precipitation days (≥ 1 mm)2221616231920921

Monthly sunshine hours in San Julian, Mexico

The sunniest months in San Julian are April, May and July, when the sun shines an average of 10 hours 53 minutes a day. Least sunny months in San Julian: January, February and November receive an average of 8 hours 47 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Julian. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours233272321327347316326325295296284288
Mean daily daylight hours11h 0m11h 26m12h 2m12h 38m13h 8m13h 22m13h 14m12h 48m12h 13m11h 37m11h 6m10h 51m

Solar UV radiation in San Julian, Mexico

San Julian experiences the highest level of ultraviolet (UV) radiation in April, May and August, 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 San Julian UV Index data.

Average daily maximum UV levels by month for San Julian. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)9111415151413141312108