nomadseason

Monthly climate in Arroyo San Isidro, Mexico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arroyo San Isidro features a tropical monsoon climate (Am). Temperatures typically range between 22 °C (72 °F) and 29 °C (85 °F) through the year, but rarely can drop to 13 °C (55 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 1697 mm (66.8 inches) and receives 191 rainy days on the 1 mm (0.04 inches) threshold annually. Arroyo San Isidro enjoys an average of 3248 hours of sunshine throughout the year, and daylight varies from 11 hours 2 minutes to 13 hours 12 minutes per day.

Monthly average temperatures in Arroyo San Isidro, Mexico

The warmest months in Arroyo San Isidro are May, June 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, February and December, when daily mean temperatures range from 22 to 23 °C (72 - 74 °F) throughout the day. On average each year, Arroyo San Isidro experiences 294 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 Arroyo San Isidro. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum33°C
(92°F)		35°C
(95°F)		37°C
(100°F)		40°C
(104°F)		39°C
(103°F)		38°C
(100°F)		36°C
(96°F)		35°C
(96°F)		36°C
(98°F)		35°C
(95°F)		34°C
(94°F)		33°C
(91°F)
Mean maximum32°C
(89°F)		33°C
(92°F)		36°C
(98°F)		38°C
(101°F)		38°C
(101°F)		35°C
(96°F)		34°C
(94°F)		34°C
(94°F)		35°C
(95°F)		34°C
(94°F)		32°C
(89°F)		31°C
(88°F)
Average high26°C
(78°F)		27°C
(81°F)		29°C
(85°F)		32°C
(90°F)		34°C
(93°F)		32°C
(90°F)		31°C
(89°F)		32°C
(89°F)		31°C
(89°F)		30°C
(86°F)		27°C
(82°F)		26°C
(79°F)
Daily mean22°C
(72°F)		23°C
(74°F)		25°C
(77°F)		27°C
(82°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)		24°C
(76°F)		23°C
(73°F)
Average low19°C
(67°F)		20°C
(68°F)		22°C
(71°F)		24°C
(75°F)		25°C
(78°F)		25°C
(77°F)		25°C
(76°F)		25°C
(76°F)		24°C
(76°F)		24°C
(75°F)		21°C
(71°F)		20°C
(67°F)
Mean minimum15°C
(60°F)		15°C
(59°F)		17°C
(63°F)		20°C
(68°F)		23°C
(73°F)		23°C
(74°F)		23°C
(73°F)		23°C
(74°F)		23°C
(73°F)		21°C
(71°F)		17°C
(64°F)		15°C
(59°F)
Minimum13°C
(56°F)		13°C
(55°F)		14°C
(58°F)		18°C
(64°F)		20°C
(68°F)		23°C
(73°F)		22°C
(72°F)		23°C
(73°F)		22°C
(72°F)		19°C
(66°F)		15°C
(60°F)		14°C
(58°F)

Compare climate in Arroyo San Isidro with other places

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

Monthly average precipitation in Arroyo San Isidro, Mexico

Arroyo San Isidro usually has the most precipitation in June, September and October, with an average of 24 rainy days and 288 mm (11.3 inches) of precipitation per month. The driest months in Arroyo San Isidro are February, March and April. On average, 31 mm (1.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arroyo San Isidro. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)46 (1.8)36 (1.4)25 (1.0)32 (1.3)58 (2.3)288 (11.3)223 (8.8)239 (9.4)310 (12.2)267 (10.5)127 (5.0)45 (1.8)
Average precipitation days (≥ 1 mm)109661023262726231510

Monthly sunshine hours in Arroyo San Isidro, Mexico

The sunniest months in Arroyo San Isidro are May, July and August, when the sun shines an average of 10 hours 3 minutes a day. Least sunny months in Arroyo San Isidro: January, February and December receive an average of 7 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arroyo San Isidro. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours179222294301325276307301274262253246
Mean daily daylight hours11h 9m11h 32m12h 2m12h 33m12h 59m13h 12m13h 5m12h 42m12h 12m11h 41m11h 15m11h 2m

Solar UV radiation in Arroyo San Isidro, Mexico

Arroyo San Isidro experiences the highest level of ultraviolet (UV) radiation in April, July 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 Arroyo San Isidro UV Index data.

Average daily maximum UV levels by month for Arroyo San Isidro. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)911121313131412131198