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Monthly climate in Ostuncalco, Guatemala

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ostuncalco features a subtropical climate (Cwb). Temperatures typically range between 17 °C (63 °F) and 19 °C (66 °F) through the year, but rarely can drop to 9 °C (49 °F) or can rise to as high as 26 °C (79 °F). The average annual precipitation amounts to about 3239 mm (127.5 inches) and receives 287 rainy days on the 1 mm (0.04 inches) threshold annually. Ostuncalco enjoys an average of 3532 hours of sunshine throughout the year, and daylight varies from 11 hours 15 minutes to 12 hours 58 minutes per day.

Monthly average temperatures in Ostuncalco, Guatemala

The warmest months in Ostuncalco are May, July and August, with daily mean temperatures ranging from 18 to 19 °C (65 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 17 to 17 °C (63 - 63 °F) throughout the day. On average each year, Ostuncalco experiences 2 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 Ostuncalco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum24°C
(75°F)		26°C
(78°F)		26°C
(79°F)		25°C
(78°F)		26°C
(79°F)		26°C
(78°F)		25°C
(77°F)		26°C
(79°F)		25°C
(77°F)		24°C
(76°F)		24°C
(76°F)		24°C
(75°F)
Mean maximum23°C
(74°F)		24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		25°C
(77°F)		24°C
(75°F)		24°C
(76°F)		25°C
(77°F)		24°C
(76°F)		24°C
(75°F)		23°C
(74°F)		23°C
(74°F)
Average high21°C
(71°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		23°C
(73°F)		22°C
(73°F)		23°C
(73°F)		23°C
(73°F)		22°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(71°F)
Daily mean17°C
(63°F)		17°C
(63°F)		18°C
(64°F)		18°C
(65°F)		18°C
(65°F)		18°C
(65°F)		19°C
(66°F)		18°C
(65°F)		18°C
(65°F)		18°C
(65°F)		18°C
(64°F)		17°C
(63°F)
Average low13°C
(56°F)		13°C
(56°F)		14°C
(57°F)		14°C
(58°F)		15°C
(60°F)		16°C
(60°F)		15°C
(60°F)		15°C
(60°F)		15°C
(60°F)		16°C
(60°F)		15°C
(59°F)		14°C
(57°F)
Mean minimum11°C
(52°F)		11°C
(53°F)		11°C
(52°F)		12°C
(54°F)		14°C
(57°F)		14°C
(58°F)		13°C
(56°F)		14°C
(57°F)		14°C
(57°F)		14°C
(57°F)		13°C
(55°F)		11°C
(52°F)
Minimum10°C
(51°F)		9°C
(49°F)		10°C
(50°F)		11°C
(53°F)		13°C
(55°F)		13°C
(56°F)		13°C
(56°F)		13°C
(55°F)		13°C
(55°F)		13°C
(56°F)		12°C
(55°F)		10°C
(51°F)

Compare climate in Ostuncalco with other places

Compare temperature, precipitation, sunshine, UV index in Ostuncalco, Guatemala with other places around the world.

Monthly average precipitation in Ostuncalco, Guatemala

Ostuncalco usually has the most precipitation in May, June and September, with an average of 30 rainy days and 526 mm (20.7 inches) of precipitation per month. The driest months in Ostuncalco are January, February and December. On average, 46 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ostuncalco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)32 (1.2)59 (2.3)110 (4.3)246 (9.7)644 (25.4)477 (18.8)258 (10.2)414 (16.3)457 (18.0)373 (14.7)122 (4.8)48 (1.9)
Average precipitation days (≥ 1 mm)91323273130293030302312

Monthly sunshine hours in Ostuncalco, Guatemala

The sunniest months in Ostuncalco are March, April and December, when the sun shines an average of 10 hours 19 minutes a day. Least sunny months in Ostuncalco: January, June and October receive an average of 8 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ostuncalco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours253285322312303271311301282275297314
Mean daily daylight hours11h 20m11h 39m12h 3m12h 27m12h 48m12h 58m12h 53m12h 34m12h 11m11h 46m11h 25m11h 15m

Solar UV radiation in Ostuncalco, Guatemala

Ostuncalco 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 / Extreme exposure category. In these months, the maximum values of the UV index do not exceed 11. For more detailed information, check out our hourly Ostuncalco UV Index data.

Average daily maximum UV levels by month for Ostuncalco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)11131415141414141413119