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Monthly climate in La Reforma, Guatemala

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification La Reforma features a tropical savanna climate (Aw). Temperatures typically range between 19 °C (67 °F) and 21 °C (70 °F) through the year, but rarely can drop to 12 °C (53 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 4234 mm (166.7 inches) and receives 317 rainy days on the 1 mm (0.04 inches) threshold annually. La Reforma 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 La Reforma, Guatemala

The warmest months in La Reforma are May, July and August, with daily mean temperatures ranging from 21 to 21 °C (70 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 19 to 20 °C (67 - 68 °F) throughout the day. On average each year, La Reforma experiences 126 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 Reforma. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum27°C
(81°F)		28°C
(82°F)		27°C
(81°F)		27°C
(81°F)		28°C
(83°F)		28°C
(82°F)		27°C
(81°F)		28°C
(83°F)		28°C
(82°F)		28°C
(82°F)		27°C
(80°F)		26°C
(79°F)
Mean maximum25°C
(78°F)		26°C
(79°F)		26°C
(79°F)		27°C
(80°F)		27°C
(82°F)		26°C
(79°F)		27°C
(80°F)		27°C
(81°F)		27°C
(81°F)		26°C
(80°F)		26°C
(79°F)		25°C
(78°F)
Average high24°C
(75°F)		24°C
(76°F)		24°C
(76°F)		25°C
(77°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(76°F)		24°C
(76°F)		24°C
(76°F)
Daily mean19°C
(67°F)		20°C
(68°F)		20°C
(68°F)		21°C
(69°F)		21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		21°C
(69°F)		21°C
(69°F)		20°C
(69°F)		20°C
(68°F)
Average low15°C
(60°F)		15°C
(60°F)		16°C
(61°F)		17°C
(63°F)		18°C
(65°F)		18°C
(65°F)		18°C
(64°F)		18°C
(64°F)		18°C
(64°F)		18°C
(64°F)		17°C
(63°F)		16°C
(61°F)
Mean minimum13°C
(55°F)		13°C
(56°F)		13°C
(55°F)		15°C
(58°F)		16°C
(62°F)		17°C
(62°F)		15°C
(60°F)		16°C
(60°F)		16°C
(61°F)		16°C
(61°F)		15°C
(59°F)		13°C
(56°F)
Minimum12°C
(53°F)		12°C
(53°F)		12°C
(54°F)		14°C
(57°F)		15°C
(59°F)		16°C
(61°F)		15°C
(59°F)		15°C
(59°F)		16°C
(60°F)		15°C
(59°F)		14°C
(58°F)		12°C
(54°F)

Compare climate in La Reforma with other places

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

Monthly average precipitation in La Reforma, Guatemala

La Reforma usually has the most precipitation in May, August and September, with an average of 30 rainy days and 631 mm (24.9 inches) of precipitation per month. The driest months in La Reforma are January, February and December. On average, 62 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in La Reforma. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)51 (2.0)62 (2.5)134 (5.3)248 (9.8)702 (27.6)561 (22.1)461 (18.2)588 (23.1)604 (23.8)528 (20.8)224 (8.8)71 (2.8)
Average precipitation days (≥ 1 mm)151828273129313030312819

Monthly sunshine hours in La Reforma, Guatemala

The sunniest months in La Reforma are March, April and December, when the sun shines an average of 10 hours 19 minutes a day. Least sunny months in La Reforma: 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 La Reforma. 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 52m12h 34m12h 11m11h 46m11h 25m11h 15m

Solar UV radiation in La Reforma, Guatemala

La Reforma 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 La Reforma UV Index data.

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