Maranhão weather in May
May is one of the least pleasant months in Maranhão: highs of 28°C (83°F) and about 238 mm (9.4 in) of rain on average. Nights average 25°C (77°F) and cloud cover 67% (NASA POWER, 2001–2025 averages). The sea averages 31°C (87°F). It is the 4th wettest month of the year and the 3rd coolest. Compared with April, it is about as warm and drier; June brings highs of 29°C (84°F) and 149 mm (5.9 in) of rain.
Figures are long-term averages for São Luís, the largest city in Maranhão. See below for other places.
Is May a good time to visit Maranhão?
least pleasant month Weather score 47/100.
May is one of the least pleasant months for weather in Maranhão. For better conditions, consider Jul–Dec.
Does it rain a lot in Maranhão in May?
Yes, it is one of the rainy months: about 238 mm (9.4 in) falls in an average May. It is the 4th wettest month of the year.
How warm is Maranhão in May?
Days average 28°C (83°F) and nights 25°C (77°F).
Maranhão weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 30°C (85°F) | 25°C (76°F) | 191 mm | 73% | 30°C (85°F) | fair |
| February | 29°C (83°F) | 25°C (76°F) | 247 mm | 81% | 30°C (86°F) | least pleasant |
| March | 28°C (83°F) | 25°C (76°F) | 322 mm | 82% | 30°C (86°F) | least pleasant |
| April | 28°C (82°F) | 25°C (77°F) | 357 mm | 82% | 30°C (86°F) | least pleasant |
| May | 28°C (83°F) | 25°C (77°F) | 238 mm | 67% | 31°C (87°F) | least pleasant |
| June | 29°C (84°F) | 25°C (76°F) | 149 mm | 50% | 30°C (87°F) | fair |
| July | 29°C (84°F) | 24°C (76°F) | 88 mm | 38% | 30°C (86°F) | best |
| August | 31°C (87°F) | 24°C (76°F) | 23 mm | 26% | 30°C (85°F) | best |
| September | 32°C (89°F) | 25°C (76°F) | 23 mm | 25% | 29°C (84°F) | best |
| October | 31°C (89°F) | 25°C (77°F) | 15 mm | 34% | 29°C (84°F) | best |
| November | 31°C (88°F) | 25°C (78°F) | 17 mm | 46% | 29°C (84°F) | best |
| December | 31°C (87°F) | 25°C (78°F) | 47 mm | 58% | 29°C (84°F) | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months
Weather across Maranhão in May
Weather can differ a lot within Maranhão: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| São Luís | 28°C (83°F) | 25°C (77°F) | 238 mm | least pleasant |
| Imperatriz | 30°C (86°F) | 23°C (73°F) | 84 mm | fair |
| São José de Ribamar | 30°C (85°F) | 24°C (76°F) | 208 mm | fair |
| Timon | 30°C (85°F) | 23°C (73°F) | 115 mm | fair |
| Caxias | 30°C (85°F) | 23°C (73°F) | 115 mm | fair |
| Paço do Lumiar | 28°C (83°F) | 25°C (77°F) | 238 mm | least pleasant |
| Codó | 29°C (84°F) | 23°C (73°F) | 134 mm | fair |
| Açailândia | 29°C (84°F) | 22°C (71°F) | 94 mm | fair |
| Bacabal | 30°C (85°F) | 23°C (74°F) | 156 mm | fair |
| Balsas | 31°C (88°F) | 21°C (71°F) | 53 mm | best |
| Barra do Corda | 30°C (86°F) | 22°C (72°F) | 83 mm | fair |
| Santa Inês | 29°C (84°F) | 23°C (74°F) | 180 mm | fair |