Rio Grande do Sul weather in January
January is a fair month to visit Rio Grande do Sul: highs of 29°C (85°F) and about 120 mm (4.7 in) of rain on average. Nights average 20°C (67°F) and cloud cover 58% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 2nd warmest. Compared with December, it is warmer and about as wet; February brings highs of 30°C (85°F) and 103 mm (4.1 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 January a good time to visit Rio Grande do Sul?
fair month Weather score 68/100.
January is a fair month in Rio Grande do Sul. The weather is usually best in Feb–May, Aug, Nov–Dec.
Does it rain a lot in Rio Grande do Sul in January?
Some rain is normal: about 120 mm (4.7 in) falls in an average January. It is the 4th wettest month of the year.
How warm is Rio Grande do Sul in January?
Days average 29°C (85°F) and nights 20°C (67°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 January
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 | 29°C (85°F) | 20°C (67°F) | 120 mm | fair |
| Caxias do Sul | 27°C (80°F) | 17°C (62°F) | 145 mm | fair |
| Pelotas | 29°C (84°F) | 19°C (67°F) | 109 mm | best |
| Canoas | 29°C (85°F) | 20°C (67°F) | 120 mm | fair |
| Santa Maria | 30°C (85°F) | 18°C (64°F) | 160 mm | fair |
| Gravataí | 29°C (85°F) | 20°C (67°F) | 120 mm | fair |
| Novo Hamburgo | 29°C (84°F) | 18°C (65°F) | 135 mm | fair |
| Viamão | 29°C (85°F) | 20°C (67°F) | 120 mm | fair |
| Passo Fundo | 28°C (82°F) | 18°C (64°F) | 151 mm | fair |
| São Leopoldo | 29°C (85°F) | 20°C (67°F) | 120 mm | fair |
| Rio Grande | 26°C (78°F) | 22°C (72°F) | 101 mm | best |
| Alvorada | 29°C (85°F) | 20°C (67°F) | 120 mm | fair |