São Luís in May
In May, São Luís averages 30°C (85°F) during the day and 24°C (76°F) at night, with frequent rain — about 31 days of the month see precipitation (249 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
May offers comfortable temperatures in São Luís, with some rain to plan around.
How May compares to the rest of the year in São Luís
May is in the middle of the year for warmth in São Luís (8th of 12) and one of the wettest months (2nd of 12). Daytime temperature runs 1°C below the annual average (30°C). May runs roughly the same as April (29°C) and stays flat into June.
May sunrise & sunset in São Luís
Times shown for São Luís local time (America/Fortaleza), calculated for the 15th of May. They shift by a few minutes day to day across the month.
Photography light in São Luís — May
Golden-hour and blue-hour windows for the 15th of May, in São Luís's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — São Luís in May
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 May's tier (Shoulder) and São Luís's popularity.
Crowds & pricing — May 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 — May 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 May weather
🌍 See the full ranked list of climate twins for São Luís in May →
Frequently asked questions
How hot is São Luís in May?
In May, São Luís averages a high of 30°C (85°F) and a low of 24°C (76°F) — generally hot.
Does it rain a lot in São Luís in May?
May is quite rainy in São Luís, with about 31 rainy days on average.
Is May a good time to visit São Luís?
May 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 May?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full May packing list for São Luís for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.