Weather in Sao Luis now
Weather in Sao Luis now: 33°C, Clear sky, Humidity 50%, Wind 17 km/h.
Sao Luis sits at 2.5° south latitude, in the equatorial belt, 3 m above sea level, in the America/Fortaleza time zone. Over the week ahead highs range from 33° to 35° and lows from 26° to 26°, averaging 30°.
Forecast rainfall totals 4 mm, and 0 of the seven days carry a chance above 50%. Today the sun rises at 05:37 and sets at 17:47: 12:10 of daylight.
| Conditions | high | low | rain | Wind | UV index | |
|---|---|---|---|---|---|---|
| Today | Overcast | 33° | 26° | 2% | 21 km/h | 9 |
| Tomorrow | Overcast | 34° | 26° | 2% | 20 km/h | 9 |
| Mon, Oct 19 | Light drizzle | 33° | 26° | 41% | 20 km/h | 9 |
| Tue, Oct 20 | Light drizzle | 33° | 26° | 27% | 20 km/h | 9 |
| Wed, Oct 21 | Overcast | 34° | 26° | 14% | 22 km/h | 9 |
| Thu, Oct 22 | Overcast | 35° | 26° | 27% | 22 km/h | 9 |
| Fri, Oct 23 | Light drizzle | 34° | 26° | 35% | 20 km/h | 9 |
Weather data by Open-Meteo (ECMWF, GFS, ICON models and national weather services). Updated every 15 minutes.
Weather in Sao Luis month by month
The table gathers the 2016-2025 climate normals for Sao Luis: average highs and lows, total rainfall and number of rainy days for each month of the year.
Sao Luis has an annual mean temperature of 27.5°. The warmest month is September, when highs sit around 31.9°; the coldest is March, with average lows of 24°. The 7.9° gap between those two ends of the calendar is the measure of how much the year swings here.
Rainfall totals about 2,275 mm a year, spread over roughly 256 rainy days. The wettest month is March, averaging 493.8 mm across 30 days; the driest is September, with 31.1 mm.
| Month | Average high | Average low | Rainfall | Rainy days |
|---|---|---|---|---|
| January | 29.6° | 24.4° | 267.9 mm | 29 |
| February | 29.2° | 24.1° | 355.3 mm | 27 |
| March | 29° | 24° | 493.8 mm | 30 |
| April | 29.4° | 24.1° | 403 mm | 29 |
| May | 29.9° | 24.4° | 245.9 mm | 26 |
| June | 30° | 24.2° | 120.8 mm | 22 |
| July | 30.3° | 24.2° | 73.3 mm | 19 |
| August | 31.1° | 24.7° | 45.4 mm | 15 |
| September | 31.9° | 25.3° | 31.1 mm | 11 |
| October | 31.9° | 25.6° | 38.9 mm | 13 |
| November | 31.7° | 25.6° | 78 mm | 14 |
| December | 31.1° | 25.4° | 121.9 mm | 21 |
When to visit Sao Luis
For travellers who plan around the weather, February–April tend to be the most comfortable stretch: average highs between 29° and 29.4° and rainfall below the yearly average.
What to expect each month
- In January, highs sit near 29.6° and lows near 24.4°, with about 267.9 mm of rain over 29 days.
- In February, highs sit near 29.2° and lows near 24.1°, with about 355.3 mm of rain over 27 days.
- In March, highs sit near 29° and lows near 24°, with about 493.8 mm of rain over 30 days.
- In April, highs sit near 29.4° and lows near 24.1°, with about 403 mm of rain over 29 days.
- In May, highs sit near 29.9° and lows near 24.4°, with about 245.9 mm of rain over 26 days.
- In June, highs sit near 30° and lows near 24.2°, with about 120.8 mm of rain over 22 days.
- In July, highs sit near 30.3° and lows near 24.2°, with about 73.3 mm of rain over 19 days.
- In August, highs sit near 31.1° and lows near 24.7°, with about 45.4 mm of rain over 15 days.
- In September, highs sit near 31.9° and lows near 25.3°, with about 31.1 mm of rain over 11 days.
- In October, highs sit near 31.9° and lows near 25.6°, with about 38.9 mm of rain over 13 days.
- In November, highs sit near 31.7° and lows near 25.6°, with about 78 mm of rain over 14 days.
- In December, highs sit near 31.1° and lows near 25.4°, with about 121.9 mm of rain over 21 days.
Recorded extremes
Across 2016-2025, the thermometer reached 35.5° at the top of the series and fell to 21.8° at the bottom. These are observed values, not averages: they show what the city has actually faced.
Normals computed from the ERA5 reanalysis (Copernicus/ECMWF), 2016-2025 series.
FAQ
What is the temperature in Sao Luis right now?
It is 33°C in Sao Luis right now, with clear sky. It feels like 37°C.
Will it rain in Sao Luis today?
The peak chance of rain today is 2%, with about 0 mm expected.
What will the weather be tomorrow in Sao Luis?
Tomorrow the high is 34° and the low 26°, with overcast.
Where does the data come from and how often is it updated?
Data comes from the ECMWF, GFS and ICON models and national weather services via Open-Meteo, updated every 15 minutes.
What is the warmest month in Sao Luis?
The warmest month is September, with average highs of 31.9° and lows of 25.3°.
Does it rain a lot in Sao Luis?
The city gets about 2,275 mm a year over 256 rainy days. The wettest month is March, with 493.8 mm.
When is the best time to visit Sao Luis?
On weather grounds, February–April combine the most agreeable temperatures with below-average rainfall.