Last updated: July 31, 2025
Under the Köppen–Geiger climate classification Puerto Santa Cruz features a cold semi-arid climate (BSk). Temperatures typically range between 3 °C (37 °F) and 16 °C (62 °F) through the year, but rarely can drop to -9 °C (17 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 281 mm (11.0 inches) and receives 61 rainy days on the 1 mm (0.04 inches) threshold annually. Puerto Santa Cruz enjoys an average of 3219 hours of sunshine throughout the year, and daylight varies from 8 hours 7 minutes to 16 hours 16 minutes per day.
The warmest months in Puerto Santa Cruz are January, February and December, with daily mean temperatures ranging from 16 to 16 °C (61 - 62 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 3 to 5 °C (37 - 42 °F) throughout the day. On average each year, Puerto Santa Cruz experiences 24 days above 25 °C (77.0 °F) and 42 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 32°C (91°F) | 36°C (97°F) | 31°C (87°F) | 29°C (84°F) | 20°C (68°F) | 14°C (58°F) | 16°C (62°F) | 22°C (72°F) | 25°C (77°F) | 28°C (83°F) | 31°C (88°F) | 34°C (93°F) |
| Mean maximum | 30°C (86°F) | 33°C (91°F) | 28°C (82°F) | 23°C (74°F) | 17°C (63°F) | 12°C (54°F) | 13°C (55°F) | 17°C (63°F) | 22°C (72°F) | 24°C (76°F) | 28°C (82°F) | 30°C (87°F) |
| Average high | 21°C (71°F) | 22°C (72°F) | 19°C (67°F) | 15°C (60°F) | 11°C (51°F) | 6°C (44°F) | 7°C (44°F) | 10°C (50°F) | 13°C (56°F) | 16°C (61°F) | 19°C (67°F) | 21°C (70°F) |
| Daily mean | 16°C (61°F) | 16°C (62°F) | 14°C (57°F) | 10°C (51°F) | 6°C (44°F) | 3°C (37°F) | 3°C (38°F) | 5°C (42°F) | 8°C (47°F) | 11°C (51°F) | 14°C (57°F) | 16°C (61°F) |
| Average low | 11°C (51°F) | 11°C (52°F) | 9°C (49°F) | 6°C (43°F) | 3°C (38°F) | -0°C (32°F) | -0°C (32°F) | 2°C (35°F) | 3°C (38°F) | 6°C (42°F) | 8°C (47°F) | 10°C (51°F) |
| Mean minimum | 6°C (42°F) | 5°C (42°F) | 4°C (39°F) | 1°C (33°F) | -2°C (28°F) | -4°C (24°F) | -6°C (22°F) | -3°C (26°F) | -2°C (28°F) | -0°C (31°F) | 3°C (38°F) | 5°C (42°F) |
| Minimum | 4°C (39°F) | 4°C (39°F) | 3°C (37°F) | -1°C (30°F) | -3°C (26°F) | -9°C (17°F) | -9°C (17°F) | -5°C (23°F) | -3°C (27°F) | -3°C (26°F) | 2°C (37°F) | 5°C (40°F) |
Compare temperature, precipitation, sunshine, UV index in Puerto Santa Cruz, Argentina with other places around the world.
Puerto Santa Cruz usually has the most precipitation in January, November and December, with an average of 6 rainy days and 28 mm (1.1 inches) of precipitation per month. The driest months in Puerto Santa Cruz are July, September and October. On average, 17 mm (0.7 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 29 (1.1) | 24 (1.0) | 25 (1.0) | 25 (1.0) | 25 (1.0) | 23 (0.9) | 17 (0.7) | 21 (0.8) | 16 (0.6) | 20 (0.8) | 26 (1.0) | 30 (1.2) |
| Average precipitation days (≥ 1 mm) | 6 | 5 | 5 | 5 | 7 | 4 | 4 | 4 | 4 | 4 | 6 | 7 |
The sunniest months in Puerto Santa Cruz are October, November and December, when the sun shines an average of 11 hours 32 minutes a day. Least sunny months in Puerto Santa Cruz: May, June and July receive an average of 5 hours 52 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 285 | 314 | 288 | 232 | 180 | 174 | 185 | 230 | 266 | 327 | 358 | 374 |
| Mean daily daylight hours | 15h 46m | 14h 14m | 12h 22m | 10h 30m | 8h 55m | 8h 7m | 8h 33m | 9h 58m | 11h 45m | 13h 38m | 15h 21m | 16h 16m |
Puerto Santa Cruz experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure. May, June and July are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Puerto Santa Cruz UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 12 | 10 | 7 | 4 | 2 | 1 | 2 | 3 | 5 | 8 | 12 | 11 |