Weather in São Luís

14-day forecast · updated today, Thursday, October 29, at 12:24 am (GMT-3)

Now · overcast 81 °F

Feels like: 87 °F
Low / high: 80 / 88 °F
Rain: 91% · 0.06 in
Wind: 10 mph NE

→ 29.91 inHg · steady UV 10 · very high

Today in São Luís: light drizzle, 80 °F to 88 °F, with a 91% chance of rain (0.06 in) and a gentle breeze from the northeast (10 mph). Tomorrow, partly cloudy, 80 °F to 88 °F and a 6% chance of rain. The warmest day of the week is Monday 2, at 90 °F. No significant rain expected over the next 7 days.

Temperatures for the next 14 days

88° 80°
Today
88° 80°
Fri 30
90° 79°
Sat 31
90° 80°
Sun 1
90° 80°
Mon 2
89° 80°
Tue 3
88° 80°
Wed 4
88° 80°
Thu 5
88° 80°
Fri 6
88° 80°
Sat 7
88° 81°
Sun 8
88° 81°
Mon 9
88° 81°
Tue 10
88° 81°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	High tides	Model
Today · 29	Light drizzle	80 / 88 °F	91% · 0.06 in	14 mph NE	9:02 am · 9:16 pm	ECMWF
Fri 30	Partly cloudy	80 / 88 °F	6%	13 mph NE	9:50 am · 10:07 pm	ECMWF
Sat 31	Mainly clear	79 / 90 °F	2%	13 mph NE	10:46 am · 11:07 pm	ECMWF
Sun 1	Partly cloudy	80 / 90 °F	10%	14 mph NE	11:53 am	ECMWF
Mon 2	Partly cloudy	80 / 90 °F	7%	15 mph ENE	12:19 am · 1:14 pm	ECMWF
Tue 3	Overcast	80 / 89 °F	14%	15 mph NE	1:41 am · 2:32 pm	ECMWF
Wed 4	Overcast	80 / 88 °F	2%	14 mph NE	2:58 am · 3:35 pm	ECMWF
Thu 5	Mainly clear	80 / 88 °F	6%	13 mph NE	3:59 am · 4:26 pm	ECMWF
Fri 6	Partly cloudy	80 / 88 °F	4%	15 mph NE	4:50 am · 5:10 pm	ECMWF
Sat 7	Mainly clear	80 / 88 °F	6%	13 mph NE	5:35 am · 5:50 pm	ECMWF
Sun 8	Light drizzle	81 / 88 °F	31% · 0.02 in	11 mph NE	6:16 am · 6:27 pm	ECMWF
Mon 9	Partly cloudy	81 / 88 °F	37%	12 mph NE	6:53 am · 7:03 pm	ECMWF
Tue 10	Light drizzle	81 / 88 °F	45% · 0.07 in	13 mph ENE	7:28 am · 7:37 pm	ECMWF
Wed 11	Light drizzle	81 / 88 °F	41% · 0.05 in	15 mph ENE	8:02 am · 8:11 pm	ECMWF

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Overcast	Overcast	Overcast	Mainly clear	Light drizzle	Light drizzle	Mainly clear	Mainly clear
Temperature	81°	80°	80°	86°	88°	86°	82°	81°
Chance of rain	2%	2%	6%	8%	76%	86%	14%	0%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.01 in	0.01 in	0.00 in	0.00 in
Wind (mph)	10 NE	10 ENE	10 ENE	10 ENE	12 NE	14 NE	13 NE	11 NE
Humidity	82%	84%	82%	65%	64%	70%	77%	80%
UV	0	0	0	6	9	3	0	0
Model	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF	ECMWF

Do the models agree?

Low confidence

They don't agree on temperature today: it may change, so check again closer to the day.

What 4 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	88°	88°	90°	90°	90°	89°	88°
AIFS	84°	85°	84°	84°	84°	84°	84°
GFS	94°	92°	95°	94°	92°	96°	95°
ICON	93°	91°	93°	93°	92°	92°	92°
Confidence	low	medium	low	medium	medium	low	low

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0.06 in	0	0	0	0	0	0
AIFS	0.06 in	0	0	0	0.05 in	0.05 in	0.02 in
GFS	0.04 in	0	0	0	0	0	0
ICON	0	0	0	0	0	0	0
Confidence	medium	high	high	high	medium	medium	high

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	1432	1330	1330	1433	1534	1534	1434
AIFS	16	17	16	17	18	17	17
GFS	1319	923	1323	1425	1225	1226	1425
ICON	1228	1126	1228	1228	1228	1127	1126
Confidence	high	medium	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	91%	6%	2%	10%	7%	14%	2%
GFS (GEFS, 31 scenarios)	3%	3%	3%	6%	3%	3%	3%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: a bit warmer and a bit drier.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	A bit above +1.6 °F	Below −70%	—
Nov 9 – Nov 15Nov 9–Nov 15	A bit above +1.6 °F	A bit below −35%	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +2.2 °F	A bit below −34%	94° / 80°
Nov 23 – Nov 29Nov 23–Nov 29	A bit above +2.2 °F	A bit below −34%	94° / 80°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.2 °F	A bit below −23%	93° / 80°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +1.4 °F	Below −79%
December	Above +2.7 °F	Below −54%
January	Above +4.0 °F	Below −56%
February	Above +4.5 °F	A bit below −43%
March	Above +4.3 °F	A bit below −31%

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

São Luís climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit São Luís is from August to November: highs of 91 °F, about 3 rainy days a month and 6 hours of sunshine a day.

89° 73°

JanJ
88° 73°

FebF
87° 73°

MarM
88° 73°

AprA
88° 74°

MayM
89° 73°

JunJ
89° 72°

JulJ
91° 72°

AugA
91° 73°

SepS
91° 73°

OctO
91° 73°

NovN
91° 74°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	89°	73°	7.50 in	19	4.0	83°	1.6 ft
FebruaryFeb	88°	73°	11.75 in	22	3.4	83°	1.7 ft
MarchMar	87°	73°	14.90 in	27	3.0	83°	1.5 ft
AprilApr	88°	73°	17.27 in	27	3.3	84°	1.4 ft
MayMay	88°	74°	10.84 in	24	5.1	84°	1.3 ft
JuneJun	89°	73°	6.31 in	18	6.0	84°	1.2 ft
JulyJul	89°	72°	4.58 in	12	6.6	83°	1.2 ft
AugustAug	91°	72°	1.11 in	4	6.9	83°	1.5 ft
SeptemberSep	91°	73°	0.75 in	1	6.7	82°	1.7 ft
OctoberOct	91°	73°	0.49 in	1	5.9	82°	1.8 ft
NovemberNov	91°	73°	0.55 in	2	5.1	82°	1.7 ft
DecemberDec	91°	74°	2.21 in	6	4.8	82°	1.7 ft

Month	Water	Waves
Jan	83°	1.6 ft
Feb	83°	1.7 ft
Mar	83°	1.5 ft
Apr	84°	1.4 ft
May	84°	1.3 ft
Jun	84°	1.2 ft
Jul	83°	1.2 ft
Aug	83°	1.5 ft
Sep	82°	1.7 ft
Oct	82°	1.8 ft
Nov	82°	1.7 ft
Dec	82°	1.7 ft

Days: rainy days in the month. Sun: hours a day.

A normal year brings 78.26 in of rain on about 162 days and about 1,850 hours of sunshine.

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now81 °Ffeels like 87 °F

Tomorrow80 / 88 °F

It's 81 °F now (feels like 87 °F). Today, 80 °F to 88 °F; tomorrow, 80 °F to 88 °F.

Chance of rain

Today 91% 0.06 in
Fri 30 6%
Sat 31 2%
Sun 1 10%
Mon 2 7%
Tue 3 14%
Wed 4 2%

Today the chance of rain reaches 91%, with 0.06 in in total. No significant rain expected this week.

Recent rain: last 24 hours, 0.12 in; last 3 days, 0.12 in; last 7 days, 0.44 in.

Humidity and dew point

Humidity83%

Dew point75 °F

Humidity is 83% now and the dew point is 75 °F. With a dew point this high, it feels muggy.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now15 migood

Clouds97%

Visibility is good now (15 mi). No fog expected today.

The model gives visibility up to about 15 mi: beyond that, the horizon is clear.

UV index

Now0

Today's peak10very high

Fri 30: 11 · Sat 31: 12 · Sun 1: 10

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising Anglers say fish bite less for a while
→ Steady · now Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.8029.9030.00 29.80

Steady now (−0.03 inHg in 3 hours). Over the next 48 hours: −0.08 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 22

Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Wed 28	Drizzle	80 / 88 °F	0.12 in	11 mph NE
Tue 27	Overcast	80 / 89 °F	0	11 mph NE
Mon 26	Overcast	79 / 88 °F	0	12 mph NE
Sun 25	Light drizzle	81 / 87 °F	0.02 in	15 mph NE
Sat 24	Drizzle	80 / 89 °F	0.08 in	14 mph NE
Fri 23	Drizzle	79 / 89 °F	0.13 in	14 mph NE
Thu 22	Drizzle	80 / 89 °F	0.08 in	15 mph ENE

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Light drizzle	79 / 89 °F	0.01 in	16 mph ENE
Tue 20	Light drizzle	80 / 88 °F	0.01 in	15 mph NE
Mon 19	Drizzle	77 / 88 °F	0.12 in	13 mph NE
Sun 18	Overcast	80 / 89 °F	0	14 mph NE
Sat 17	Overcast	80 / 88 °F	0	14 mph NE
Fri 16	Partly cloudy	80 / 90 °F	0	12 mph NE
Thu 15	Overcast	80 / 88 °F	0	14 mph NE
Wed 14	Overcast	80 / 88 °F	0	16 mph NE
Tue 13	Light drizzle	79 / 88 °F	0.04 in	16 mph ENE
Mon 12	Light drizzle	79 / 88 °F	0.05 in	13 mph ENE
Sun 11	Drizzle	79 / 87 °F	0.12 in	13 mph NE
Sat 10	Drizzle	79 / 87 °F	0.12 in	13 mph NE
Fri 9	Light drizzle	80 / 88 °F	0.04 in	15 mph ENE
Thu 8	Light drizzle	80 / 89 °F	0.01 in	15 mph NE
Wed 7	Overcast	80 / 91 °F	0	15 mph ENE
Tue 6	Mainly clear	78 / 90 °F	0	15 mph ENE
Mon 5	Drizzle	80 / 87 °F	0.11 in	15 mph ENE
Sun 4	Light drizzle	80 / 88 °F	0.05 in	14 mph ENE
Sat 3	Overcast	80 / 88 °F	0	13 mph NE
Fri 2	Light drizzle	80 / 87 °F	0.05 in	13 mph NE
Thu 1	Light drizzle	80 / 87 °F	0.02 in	17 mph ENE
Wed 30	Light drizzle	80 / 88 °F	0.06 in	15 mph NE
Tue 29	Light drizzle	79 / 88 °F	0.01 in	13 mph NE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in São LuísQuestions

What's the weather like today in São Luís?

Light drizzle, from 80 °F to 88 °F, with a gentle breeze from the northeast (10 mph) and a 91% chance of rain.

Will it rain tomorrow in São Luís?

On Friday 30 the chance of rain is 6% (0.00 in): partly cloudy.

How warm will it be this week?

Between a low of 79 °F and a high of 90 °F; the warmest day, Monday 2.

What's the UV index today?

It reaches 10 (very high). Avoid the midday sun; reflection off the water adds to it.

Is the pressure rising or falling?

It's 29.91 inHg and steady: 0.00 inHg over the last 24 hours.

When is the best time to visit São Luís?

The best time to visit São Luís is from August to November: highs of 91 °F, about 3 rainy days a month and 6 hours of sunshine a day.

What is the weather like in São Luís in October?

In October, São Luís normally sees highs of 91 °F and lows of 73 °F, with about 1 rainy days (0.49 in for the month) and 6 hours of sunshine a day. The sea is around 82 °F. These are 1991–2020 averages.

What are the warmest and wettest months in São Luís?

The warmest is October, with average highs of 91 °F, and the coldest July, with lows of 72 °F. The wettest is April (17.27 in) and the driest, October.

More about São Luís today

Weather near São Luís

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 4.2 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 12:24 am (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from