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Monthly climate in Arma, Peru

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arma features a cold desert climate (BWk). Temperatures typically range between 3 °C (38 °F) and 5 °C (41 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 13 °C (56 °F). The average annual precipitation amounts to about 1870 mm (73.6 inches) and receives 281 rainy days on the 1 mm (0.04 inches) threshold annually. Arma enjoys an average of 3527 hours of sunshine throughout the year, and daylight varies from 11 hours 21 minutes to 12 hours 52 minutes per day.

Monthly average temperatures in Arma, Peru

The warmest months in Arma are March, November and December, with daily mean temperatures ranging from 5 to 5 °C (41 - 41 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 3 to 4 °C (38 - 39 °F) throughout the day. On average each year, Arma experiences 0 days above 25 °C (77.0 °F) and 127 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Arma. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°C
(55°F)		13°C
(56°F)		12°C
(55°F)		12°C
(54°F)		11°C
(52°F)		12°C
(55°F)		12°C
(54°F)		13°C
(55°F)		13°C
(56°F)		12°C
(54°F)		13°C
(55°F)		13°C
(55°F)
Mean maximum11°C
(53°F)		12°C
(53°F)		11°C
(53°F)		11°C
(52°F)		11°C
(51°F)		10°C
(51°F)		11°C
(52°F)		11°C
(51°F)		11°C
(52°F)		11°C
(53°F)		12°C
(54°F)		12°C
(54°F)
Average high9°C
(49°F)		9°C
(49°F)		9°C
(49°F)		9°C
(49°F)		9°C
(48°F)		8°C
(47°F)		8°C
(47°F)		9°C
(48°F)		9°C
(48°F)		9°C
(49°F)		9°C
(49°F)		9°C
(49°F)
Daily mean5°C
(41°F)		5°C
(41°F)		5°C
(41°F)		5°C
(41°F)		4°C
(39°F)		3°C
(38°F)		3°C
(38°F)		4°C
(39°F)		4°C
(40°F)		5°C
(40°F)		5°C
(41°F)		5°C
(41°F)
Average low2°C
(35°F)		2°C
(36°F)		2°C
(36°F)		1°C
(33°F)		-1°C
(31°F)		-2°C
(30°F)		-2°C
(29°F)		-1°C
(30°F)		0°C
(32°F)		1°C
(33°F)		1°C
(34°F)		2°C
(35°F)
Mean minimum-2°C
(29°F)		-1°C
(30°F)		-2°C
(29°F)		-4°C
(26°F)		-6°C
(22°F)		-6°C
(21°F)		-5°C
(23°F)		-5°C
(23°F)		-5°C
(23°F)		-4°C
(25°F)		-2°C
(28°F)		-2°C
(29°F)
Minimum-4°C
(25°F)		-4°C
(26°F)		-4°C
(26°F)		-6°C
(22°F)		-7°C
(20°F)		-10°C
(14°F)		-6°C
(21°F)		-7°C
(20°F)		-8°C
(19°F)		-6°C
(22°F)		-4°C
(25°F)		-6°C
(22°F)

Compare climate in Arma with other places

Compare temperature, precipitation, sunshine, UV index in Arma, Peru with other places around the world.

Monthly average precipitation in Arma, Peru

Arma usually has the most precipitation in January, February and March, with an average of 28 rainy days and 255 mm (10.0 inches) of precipitation per month. The driest months in Arma are June, July and August. On average, 48 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arma. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)230 (9.1)257 (10.1)277 (10.9)159 (6.2)101 (4.0)45 (1.8)42 (1.6)58 (2.3)137 (5.4)175 (6.9)173 (6.8)217 (8.5)
Average precipitation days (≥ 1 mm)252831262212121427282828

Monthly sunshine hours in Arma, Peru

The sunniest months in Arma are July, August and September, when the sun shines an average of 10 hours 48 minutes a day. Least sunny months in Arma: January, February and March receive an average of 7 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arma. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours219237261299323312330337325320282276
Mean daily daylight hours12h 46m12h 29m12h 8m11h 46m11h 29m11h 21m11h 25m11h 40m12h 1m12h 23m12h 42m12h 52m

Solar UV radiation in Arma, Peru

Arma experiences the highest level of ultraviolet (UV) radiation in February, November and December, when the maximum UV index can reach values of 19 - 20, which corresponds to the Extreme category of sun exposure. May, June and July are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 15. For more detailed information, check out our hourly Arma UV Index data.

Average daily maximum UV levels by month for Arma. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)192019181512141517191919