The best times to visit Sao Luis for ideal weather are

August 6th to December 23rd

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Sao Luis Travel Info

Weather in Sao Luis


Average temperatures in Sao Luis vary barely at all. Considering humidity, temperatures feel hot all year with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 15th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Sao Luis, the hottest months are December, November, and then October. See average monthly temperatures below. The warmest time of year is generally late December where highs are regularly around 90.5°F (32.5°C) with temperatures rarely dropping below 78.8°F (26°C) at night.

Sao Luis Temperatures (Fahrenheit)


Sao Luis Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Sao Luis Perceived Temperature (F)


Sao Luis Perceived Temperature (C)



Average Sao Luis Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 88.6 81.7 77.1
Feb 87.9 80.8 76.2
Mar 87.3 80.4 75.9
Apr 87.3 80.1 75.8
May 88.1 80.6 76.1
Jun 88.6 80.9 75.9
Jul 88.4 80.8 76
Aug 89.7 81.7 76.8
Sep 89.8 82.2 77.7
Oct 89.9 82.6 78.2
Nov 89.8 82.8 78.4
Dec 90 83 78.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 31.4 27.6 25.1
Feb 31.1 27.1 24.6
Mar 30.7 26.9 24.4
Apr 30.7 26.7 24.3
May 31.2 27 24.5
Jun 31.4 27.2 24.4
Jul 31.3 27.1 24.4
Aug 32.1 27.6 24.9
Sep 32.1 27.9 25.4
Oct 32.2 28.1 25.7
Nov 32.1 28.2 25.8
Dec 32.2 28.3 25.8



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Sao Luis are October, November, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early September. For example, on the week of September 3rd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid April with an average of 4 days of significant precipitation the week of April 9th.

When can you find snow in Sao Luis? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Sao Luis.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Sao Luis (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 23% 0 3.6
Feb 31% 0 5.3
Mar 44% 0 6.8
Apr 51% 0 7.1
May 44% 0 7.7
Jun 32% 0 4.8
Jul 22% 0 3.1
Aug 5% 0 0.4
Sep 2% 0 0.1
Oct 1% 0 0.1
Nov 1% 0 0.1
Dec 4% 0 0.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 23 0 9.1
Feb 31 0 13.5
Mar 44 0 17.3
Apr 51 0 18
May 44 0 19.6
Jun 32 0 12.2
Jul 22 0 7.9
Aug 5 0 1
Sep 2 0 0.3
Oct 1 0 0.3
Nov 1 0 0.3
Dec 4 0 1


Humidity and Wind

Sao Luis has some very humid months, with other comfortably humid months. The least humid month is October (58.6% relative humidity), and the most humid month is April (75.4%).

Wind in Sao Luis is usually moderate. The windiest month is November, followed by October and December. November’s average wind speed of around 11 knots (12.6 MPH or 20.3 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early November where average top sustained speeds reach 18.5 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Sao Luis.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 8.4 Gentle breeze 16 Significant breeze
Feb 7 Gentle breeze 14.6 Significant breeze
Mar 6 Light breeze 13.7 Significant breeze
Apr 5.2 Light breeze 12.6 Significant breeze
May 4.9 Light breeze 12 Significant breeze
Jun 5.5 Light breeze 12.2 Significant breeze
Jul 6.2 Light breeze 12.3 Significant breeze
Aug 8 Gentle breeze 13.8 Significant breeze
Sep 10.2 Gentle breeze 16.3 Significant breeze
Oct 10.9 Gentle breeze 17.8 Strong breeze
Nov 11 Significant breeze 18.1 Significant breeze
Dec 10.5 Gentle breeze 18.1 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 64.4%
Feb 69.7%
Mar 72.9%
Apr 75.4%
May 74.1%
Jun 70.3%
Jul 69.1%
Aug 64.4%
Sep 60.4%
Oct 58.6%
Nov 58.6%
Dec 59%


Is it Safe to Travel to Sao Luis?

Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for Brazil; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 01, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Sao Luis, Brazil is October, followed by February and January. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Sao Luis in September. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 44 in September means 44% of the tourists vs. October.



Overall Sao Luis Travel Experience by Season

Fall (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 88.8°F (31.6°C) and 86.8°F (30.4°C) with similar temperatures in the later months. Rain is frequent with 13 to 15 days of significant precipitation per month. Fall is the slowest for tourism, which makes it a good time for those looking for deals.

Winter (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 1 to 10 days of precipitation per month. June – August is the second busiest season for tourism in Sao Luis, so lodging and other accommodations may cost slightly more.

Spring (September through November)

Spring daily highs range from 90.5°F (32.5°C) and 89.5°F (31.9°C), which will feel very nice given the humidity and wind. It rains or snows a trivial amount: approximately 0 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Summer (December through February)

Weather is perfect this time of year in Sao Luis to be enjoyable for warm weather travelers. The average high during this season is between 90.4°F (32.4°C) and 87.1°F (30.6°C). On average, it rains or snows a fair amount: 1 to 9 times per month. These times of year are the busiest with tourists.


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