São Luís in December
7.1out of 10
Possible, with caveats
Warm and comfortable: highs around 28°C. Very wet: about 15 rainy days.
28°CAvg high
26°CAvg low
15Rainy days (73 mm)
12:09 hDaylight
05:49Sunrise · 17:58 Sunset
Why this score
- Warm and comfortable: highs around 28°C
- Very wet: about 15 rainy days
- Rain varies a lot between years (±5.6 days)
What to wear and pack
- T-shirts and light layers
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in December varies a lot between years (±5.6 rainy days), so check the forecast closer to your trip. 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 | 25°C | 221 mm | 25 | – | – | 6.1 |
| February | 28°C | 25°C | 305 mm | 26 | – | – | 6.1 |
| March | 27°C | 25°C | 439 mm | 30 | – | – | 6.1 |
| April | 28°C | 25°C | 416 mm | 29 | – | – | 6.1 |
| May | 28°C | 26°C | 286 mm | 27 | – | – | 6.1 |
| June | 28°C | 26°C | 153 mm | 23 | – | – | 6.1 |
| July | 29°C | 26°C | 103 mm | 20 | – | – | 6.3 |
| August | 29°C | 26°C | 28 mm | 9 | – | – | 7.9 |
| September | 29°C | 26°C | 11 mm | 3 | – | – | 8.7 |
| October | 28°C | 26°C | 13 mm | 4 | – | – | 8.6 |
| November | 28°C | 26°C | 27 mm | 7 | – | – | 8.2 |
| December | 28°C | 26°C | 73 mm | 15 | – | – | 7.1 |
Frequently asked questions
How hot is São Luís in December?
Daytime highs average 28°C and nights about 26°C.
When is the best time to visit São Luís?
The best months are September, October, November.