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Monthly climate in Trelew, Argentina

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Trelew features a cold semi-arid climate (BSk). Temperatures typically range between 7 °C (45 °F) and 22 °C (71 °F) through the year, but rarely can drop to -6 °C (22 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 240 mm (9.5 inches) and receives 38 rainy days on the 1 mm (0.04 inches) threshold annually. Trelew enjoys an average of 3638 hours of sunshine throughout the year, and daylight varies from 9 hours 0 minutes to 15 hours 18 minutes per day.

Monthly average temperatures in Trelew, Argentina

The warmest months in Trelew are January, February and December, with daily mean temperatures ranging from 20 to 22 °C (69 - 71 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 7 to 9 °C (45 - 49 °F) throughout the day. On average each year, Trelew experiences 93 days above 25 °C (77.0 °F) and 12 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Trelew. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum41°C
(106°F)		40°C
(104°F)		36°C
(96°F)		33°C
(92°F)		28°C
(82°F)		21°C
(69°F)		20°C
(69°F)		25°C
(77°F)		31°C
(88°F)		32°C
(89°F)		37°C
(98°F)		38°C
(100°F)
Mean maximum38°C
(100°F)		37°C
(99°F)		34°C
(94°F)		31°C
(87°F)		25°C
(78°F)		19°C
(66°F)		18°C
(65°F)		22°C
(73°F)		28°C
(82°F)		30°C
(87°F)		34°C
(93°F)		37°C
(98°F)
Average high28°C
(82°F)		27°C
(81°F)		25°C
(77°F)		21°C
(71°F)		16°C
(62°F)		12°C
(54°F)		12°C
(54°F)		15°C
(59°F)		18°C
(65°F)		20°C
(69°F)		24°C
(75°F)		26°C
(80°F)
Daily mean22°C
(71°F)		21°C
(70°F)		19°C
(66°F)		15°C
(60°F)		11°C
(52°F)		8°C
(46°F)		7°C
(45°F)		9°C
(49°F)		12°C
(54°F)		15°C
(59°F)		18°C
(64°F)		20°C
(69°F)
Average low16°C
(61°F)		16°C
(60°F)		13°C
(56°F)		11°C
(51°F)		6°C
(44°F)		4°C
(39°F)		3°C
(38°F)		5°C
(41°F)		7°C
(44°F)		9°C
(49°F)		12°C
(54°F)		14°C
(58°F)
Mean minimum10°C
(51°F)		9°C
(49°F)		7°C
(44°F)		4°C
(40°F)		-1°C
(30°F)		-2°C
(28°F)		-3°C
(27°F)		-1°C
(30°F)		1°C
(35°F)		1°C
(35°F)		6°C
(44°F)		8°C
(46°F)
Minimum8°C
(47°F)		7°C
(45°F)		5°C
(41°F)		-1°C
(30°F)		-4°C
(25°F)		-4°C
(24°F)		-6°C
(22°F)		-4°C
(25°F)		0°C
(33°F)		-1°C
(30°F)		5°C
(40°F)		6°C
(44°F)

Compare climate in Trelew with other places

Compare temperature, precipitation, sunshine, UV index in Trelew, Argentina with other places around the world.

Monthly average precipitation in Trelew, Argentina

Trelew usually has the most precipitation in March, June and November, with an average of 4 rainy days and 36 mm (1.4 inches) of precipitation per month. The driest months in Trelew are January, February and September. On average, 11 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Trelew. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)7 (0.3)11 (0.4)38 (1.5)20 (0.8)16 (0.6)45 (1.8)17 (0.7)17 (0.7)14 (0.5)14 (0.6)25 (1.0)16 (0.6)
Average precipitation days (≥ 1 mm)125344443332

Monthly sunshine hours in Trelew, Argentina

The sunniest months in Trelew are October, November and December, when the sun shines an average of 12 hours 15 minutes a day. Least sunny months in Trelew: May, June and July receive an average of 7 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Trelew. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours330345329277241205216259304351366409
Mean daily daylight hours14h 56m13h 45m12h 18m10h 50m9h 36m9h 0m9h 20m10h 25m11h 49m13h 18m14h 37m15h 18m

Solar UV radiation in Trelew, Argentina

Trelew experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure. May, June and July are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Trelew UV Index data.

Average daily maximum UV levels by month for Trelew. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1311853224681213