Arroio Grande in September
7.0out of 10
Possible, with caveats
Mild: highs around 19°C. Frequent rain: about 10 rainy days.
19°CAvg high
11°CAvg low
10Rainy days (124 mm)
11:49 hDaylight
06:32Sunrise · 18:21 Sunset
Why this score
- Mild: highs around 19°C
- Frequent rain: about 10 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in September is fairly consistent from year to year (2.2 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 September?
Daytime highs average 19°C and nights about 11°C.
When is the best time to visit Arroio Grande?
The best months are November, March, December, April.