The best times to visit French Guiana for ideal weather are

August 20th to September 16th

or

October 8th to November 4th

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

 

 


Other French Guiana Travel Info

Weather in French Guiana

Temperature

Average temperatures in French Guiana vary barely at all. Considering humidity, temperatures feel hot all year with a chance of rain throughout most of the year. The area is far less temperate than some — in the 3rd 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 French Guiana, the hottest months are October, September, and then November. See average monthly temperatures below. The warmest time of year is generally late September where highs are regularly around 94°F (34.4°C) with temperatures rarely dropping below 72.3°F (22.4°C) at night.

French Guiana Temperatures (Fahrenheit)

Key
High
Average
Low

French Guiana Temperatures (Celsius)

Key
High
Average
Low

“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.

French Guiana Perceived Temperature (F)

Key
High
Average
Low

French Guiana Perceived Temperature (C)

Key
High
Average
Low

 

Average French Guiana 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

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan87.177.972.7
Feb86.777.973.1
Mar87.778.873.4
Apr88.579.273.7
May88.378.873.5
Jun89.278.772.8
Jul9078.672.1
Aug91.880.172.2
Sep93.181.172
Oct93.581.372.3
Nov92.380.572.3
Dec8978.672.6

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan30.625.522.6
Feb30.425.522.8
Mar30.92623
Apr31.426.223.2
May31.32623.1
Jun31.825.922.7
Jul32.225.922.3
Aug33.226.722.3
Sep33.927.322.2
Oct34.227.422.4
Nov33.526.922.4
Dec31.725.922.6

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in French Guiana are September, October, and then November. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid to late September. For example, on the week of September 17th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid June with an average of 5 days of significant precipitation the week of June 11th.

When can you find snow in French Guiana? 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 French Guiana.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in French Guiana (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan57%012.1
Feb65%015.1
Mar54%012.4
Apr55%012
May67%017.4
Jun65%011.7
Jul52%09.3
Aug30%05.5
Sep15%02.2
Oct17%02.8
Nov26%04.3
Dec53%010.3

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan57030.7
Feb65038.4
Mar54031.5
Apr55030.5
May67044.2
Jun65029.7
Jul52023.6
Aug30014
Sep1505.6
Oct1707.1
Nov26010.9
Dec53026.2

 

Humidity and Wind

French Guiana has some extremely humid months, and high humidity throughout the year. The least humid month is September (71.2% relative humidity), and the most humid month is May (84%).

Wind in French Guiana is usually extremely calm. The windiest month is March, followed by February and April. March’s average wind speed of around 3.6 knots (4.1 MPH or 6.6 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late March where average top sustained speeds reach 8.5 knots, which is considered a gentle breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in French Guiana.

Key
Avg. Relative Humidity

Wind

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

Key
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.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan3.2Barely noticeable7.6Gentle breeze
Feb3.4Barely noticeable7.6Gentle breeze
Mar3.6Barely noticeable7.9Gentle breeze
Apr3.3Barely noticeable7.6Gentle breeze
May2.5Barely noticeable6.6Gentle breeze
Jun2.2Barely noticeable6.3Light breeze
Jul2.1Barely noticeable6.2Gentle breeze
Aug2.5Barely noticeable6.5Light breeze
Sep2.8Barely noticeable6.9Gentle breeze
Oct2.9Barely noticeable7.2Gentle breeze
Nov2.9Barely noticeable7.3Gentle breeze
Dec3Barely noticeable7.7Gentle breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan82.6%
Feb83.7%
Mar81.7%
Apr81.6%
May84%
Jun82.9%
Jul80.9%
Aug75.7%
Sep71.2%
Oct71.4%
Nov73.9%
Dec81.4%

 

Is it Safe to Travel to French Guiana?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for French Guiana; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Aug 22, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in French Guiana is June, followed by August and November. 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 French Guiana in March. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
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 47.5 in March means 47.5% of the tourists vs. June.

 

 

Overall French Guiana Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 88.8°F (31.6°C) and 87.2°F (30.7°C) with similar temperatures in the later months. Rain is frequent with 16 to 21 days of significant precipitation per month. Spring is the slowest for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 9 to 19 days of precipitation per month. June – August is the busiest season for tourism in French Guiana, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 94°F (34.4°C) and 91.3°F (32.9°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 4 to 8 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.

Winter (December through February)

Weather is perfect this time of year in French Guiana to be enjoyable for warm weather travelers. The average high during this season is between 90.4°F (32.4°C) and 86.3°F (30.2°C). On average, it rains or snows a very great amount: 16 to 18 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel › French Guiana