Arroio Grande in December
7.7out of 10
Yes, a good time to go
Warm and comfortable: highs around 27°C. Frequent rain: about 10 rainy days.
27°CAvg high
18°CAvg low
10Rainy days (96 mm)
14:06 hDaylight
05:25Sunrise · 19:32 Sunset
Why this score
- Warm and comfortable: highs around 27°C
- Frequent rain: about 10 rainy days
What to wear and pack
- T-shirts and light layers
- Shorts or a light skirt
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in December is fairly consistent from year to year (2.5 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 28°C | 20°C | 111 mm | 11 | – | – | 7.5 |
| February | 27°C | 20°C | 109 mm | 11 | – | – | 7.4 |
| March | 26°C | 19°C | 103 mm | 10 | – | – | 7.7 |
| April | 23°C | 16°C | 124 mm | 10 | – | – | 7.6 |
| May | 20°C | 13°C | 96 mm | 9 | – | – | 7.5 |
| June | 17°C | 10°C | 110 mm | 9 | – | – | 6.9 |
| July | 16°C | 9°C | 107 mm | 9 | – | – | 6.8 |
| August | 18°C | 10°C | 107 mm | 9 | – | – | 7.2 |
| September | 19°C | 11°C | 124 mm | 10 | – | – | 7.0 |
| October | 22°C | 14°C | 133 mm | 10 | – | – | 7.4 |
| November | 24°C | 16°C | 98 mm | 8 | – | – | 7.9 |
| December | 27°C | 18°C | 96 mm | 10 | – | – | 7.7 |
Frequently asked questions
How hot is Arroio Grande in December?
Daytime highs average 27°C and nights about 18°C.
When is the best time to visit Arroio Grande?
The best months are November, March, December, April.