Last updated: July 31, 2025
Under the Köppen–Geiger climate classification Santa Rosa features a humid subtropical climate (Cfa). Temperatures typically range between 16 °C (61 °F) and 27 °C (81 °F) through the year, but rarely can drop to 1 °C (33 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 1501 mm (59.1 inches) and receives 110 rainy days on the 1 mm (0.04 inches) threshold annually. Santa Rosa enjoys an average of 3460 hours of sunshine throughout the year, and daylight varies from 10 hours 27 minutes to 13 hours 47 minutes per day.
The warmest months in Santa Rosa are January, February and December, with daily mean temperatures ranging from 26 to 27 °C (79 - 81 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 16 to 18 °C (61 - 65 °F) throughout the day. On average each year, Santa Rosa experiences 228 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 41°C (106°F) | 40°C (105°F) | 38°C (101°F) | 34°C (94°F) | 33°C (92°F) | 31°C (88°F) | 33°C (91°F) | 39°C (102°F) | 37°C (99°F) | 40°C (105°F) | 39°C (103°F) | 38°C (100°F) |
| Mean maximum | 37°C (98°F) | 37°C (99°F) | 36°C (98°F) | 33°C (91°F) | 30°C (87°F) | 27°C (82°F) | 31°C (88°F) | 35°C (95°F) | 36°C (97°F) | 36°C (98°F) | 36°C (97°F) | 37°C (98°F) |
| Average high | 32°C (90°F) | 32°C (90°F) | 30°C (87°F) | 27°C (81°F) | 23°C (74°F) | 22°C (72°F) | 22°C (71°F) | 24°C (76°F) | 26°C (79°F) | 28°C (83°F) | 30°C (86°F) | 32°C (89°F) |
| Daily mean | 27°C (81°F) | 26°C (80°F) | 25°C (77°F) | 22°C (72°F) | 19°C (66°F) | 17°C (63°F) | 16°C (61°F) | 18°C (65°F) | 21°C (69°F) | 23°C (73°F) | 25°C (76°F) | 26°C (79°F) |
| Average low | 23°C (73°F) | 21°C (71°F) | 20°C (69°F) | 18°C (64°F) | 15°C (59°F) | 13°C (56°F) | 12°C (53°F) | 13°C (55°F) | 16°C (61°F) | 18°C (65°F) | 19°C (67°F) | 21°C (70°F) |
| Mean minimum | 19°C (66°F) | 16°C (61°F) | 15°C (59°F) | 12°C (54°F) | 8°C (46°F) | 5°C (41°F) | 2°C (35°F) | 4°C (40°F) | 9°C (49°F) | 12°C (54°F) | 15°C (59°F) | 16°C (61°F) |
| Minimum | 16°C (60°F) | 14°C (58°F) | 13°C (56°F) | 9°C (48°F) | 5°C (42°F) | 2°C (35°F) | 1°C (33°F) | 1°C (34°F) | 7°C (45°F) | 10°C (49°F) | 12°C (54°F) | 14°C (58°F) |
Compare temperature, precipitation, sunshine, UV index in Santa Rosa, Paraguay with other places around the world.
Santa Rosa usually has the most precipitation in January, May and October, with an average of 12 rainy days and 185 mm (7.3 inches) of precipitation per month. The driest months in Santa Rosa are July, August and September. On average, 81 mm (3.2 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 156 (6.2) | 102 (4.0) | 120 (4.7) | 132 (5.2) | 216 (8.5) | 100 (3.9) | 77 (3.0) | 72 (2.8) | 94 (3.7) | 183 (7.2) | 150 (5.9) | 97 (3.8) |
| Average precipitation days (≥ 1 mm) | 13 | 10 | 10 | 7 | 11 | 8 | 7 | 5 | 9 | 12 | 9 | 9 |
The sunniest months in Santa Rosa are March, November and December, when the sun shines an average of 11 hours 3 minutes a day. Least sunny months in Santa Rosa: May, June and July receive an average of 7 hours 53 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 274 | 310 | 318 | 277 | 245 | 229 | 251 | 289 | 270 | 292 | 321 | 377 |
| Mean daily daylight hours | 13h 35m | 12h 58m | 12h 12m | 11h 24m | 10h 46m | 10h 27m | 10h 37m | 11h 11m | 11h 56m | 12h 44m | 13h 26m | 13h 47m |
Santa Rosa experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure. May, June and July are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 7. For more detailed information, check out our hourly Santa Rosa UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 15 | 14 | 13 | 10 | 7 | 5 | 6 | 7 | 10 | 13 | 14 | 14 |