São Luís in December
In December, São Luís averages 31°C (88°F) during the day and 26°C (78°F) at night, with frequent rain — about 26 days of the month see precipitation (117 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
December is one of the wetter and less comfortable months in São Luís. If your dates are flexible, consider a different time of year.
How December compares to the rest of the year in São Luís
December is in the middle of the year for warmth in São Luís (5th of 12) and moderately rainy compared to the rest of the year (9th of 12). Daytime temperature runs 1°C above the annual average (30°C). December runs 1°C cooler than November (32°C) and cools 1°C in January (30°C).
December sunrise & sunset in São Luís
Times shown for São Luís local time (America/Fortaleza), calculated for the 15th of December. They shift by a few minutes day to day across the month.
Photography light in São Luís — December
Golden-hour and blue-hour windows for the 15th of December, in São Luís's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — São Luís in December
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on December's tier (Shoulder) and São Luís's popularity.
Crowds & pricing — December in São Luís
São Luís is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — December in São Luís
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
São Luís in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 30°C / 85°F | 25°C / 76°F | 238 mm | 30 | — |
| February | 29°C / 84°F | 24°C / 76°F | 327 mm | 28 | — |
| March | 29°C / 84°F | 24°C / 75°F | 473 mm | 31 | — |
| April | 29°C / 85°F | 24°C / 76°F | 370 mm | 30 | — |
| May | 30°C / 85°F | 24°C / 76°F | 249 mm | 31 | — |
| June | 30°C / 85°F | 24°C / 76°F | 126 mm | 29 | — |
| July | 30°C / 86°F | 24°C / 76°F | 74 mm | 29 | — |
| August | 31°C / 88°F | 25°C / 77°F | 39 mm | 27 | — |
| September | 32°C / 89°F | 25°C / 78°F | 29 mm | 25 | — |
| October | 32°C / 89°F | 26°C / 78°F | 33 mm | 23 | — |
| November | 32°C / 89°F | 26°C / 78°F | 73 mm | 22 | — |
| December | 31°C / 88°F | 26°C / 78°F | 117 mm | 26 | — |
Other cities with similar December weather
🌍 See the full ranked list of climate twins for São Luís in December →
Frequently asked questions
How hot is São Luís in December?
In December, São Luís averages a high of 31°C (88°F) and a low of 26°C (78°F) — generally hot.
Does it rain a lot in São Luís in December?
December is quite rainy in São Luís, with about 26 rainy days on average.
Is December a good time to visit São Luís?
December is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for São Luís in December?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full December packing list for São Luís for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.