Rio Grande do Sul weather in October
October is one of the least pleasant months in Rio Grande do Sul: highs of 24°C (75°F) and about 155 mm (6.1 in) of rain on average. Nights average 14°C (57°F) and cloud cover 63% (NASA POWER, 2001–2025 averages). It is the 2nd wettest month of the year and the 6th coolest. Compared with September, it is warmer and about as wet; November brings highs of 26°C (79°F) and 110 mm (4.3 in) of rain.
Figures are long-term averages for Porto Alegre, the largest city in Rio Grande do Sul. See below for other places.
Is October a good time to visit Rio Grande do Sul?
least pleasant month Weather score 62/100.
October is one of the least pleasant months for weather in Rio Grande do Sul. For better conditions, consider Feb–May, Aug, Nov–Dec.
Does it rain a lot in Rio Grande do Sul in October?
Yes, it is one of the rainy months: about 155 mm (6.1 in) falls in an average October. It is the 2nd wettest month of the year.
How warm is Rio Grande do Sul in October?
Days average 24°C (75°F) and nights 14°C (57°F).
Rio Grande do Sul weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 29°C (85°F) | 20°C (67°F) | 120 mm | 58% | fair |
| February | 30°C (85°F) | 20°C (68°F) | 103 mm | 55% | best |
| March | 28°C (83°F) | 18°C (65°F) | 103 mm | 56% | best |
| April | 26°C (78°F) | 16°C (60°F) | 98 mm | 56% | best |
| May | 21°C (70°F) | 12°C (54°F) | 112 mm | 60% | best |
| June | 19°C (66°F) | 10°C (50°F) | 113 mm | 62% | fair |
| July | 18°C (65°F) | 9°C (48°F) | 149 mm | 58% | least pleasant |
| August | 20°C (69°F) | 10°C (50°F) | 116 mm | 56% | best |
| September | 22°C (71°F) | 12°C (53°F) | 157 mm | 62% | least pleasant |
| October | 24°C (75°F) | 14°C (57°F) | 155 mm | 63% | least pleasant |
| November | 26°C (79°F) | 16°C (60°F) | 110 mm | 54% | best |
| December | 28°C (83°F) | 18°C (64°F) | 110 mm | 55% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Rio Grande do Sul in October
Weather can differ a lot within Rio Grande do Sul: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Porto Alegre | 24°C (75°F) | 14°C (57°F) | 155 mm | least pleasant |
| Caxias do Sul | 23°C (73°F) | 12°C (54°F) | 183 mm | least pleasant |
| Pelotas | 22°C (71°F) | 13°C (55°F) | 128 mm | fair |
| Canoas | 24°C (75°F) | 14°C (57°F) | 155 mm | least pleasant |
| Santa Maria | 24°C (76°F) | 13°C (55°F) | 207 mm | least pleasant |
| Gravataí | 24°C (75°F) | 14°C (57°F) | 155 mm | least pleasant |
| Novo Hamburgo | 24°C (74°F) | 14°C (56°F) | 168 mm | least pleasant |
| Viamão | 24°C (75°F) | 14°C (57°F) | 155 mm | least pleasant |
| Passo Fundo | 24°C (76°F) | 13°C (55°F) | 210 mm | least pleasant |
| São Leopoldo | 24°C (75°F) | 14°C (57°F) | 155 mm | least pleasant |
| Rio Grande | 19°C (67°F) | 16°C (61°F) | 126 mm | fair |
| Alvorada | 24°C (75°F) | 14°C (57°F) | 155 mm | least pleasant |