The best times to visit French Guiana for ideal weather are
August 20th to September 16th
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.
French Guiana Travel Guide
Other French Guiana Travel Info
Weather in French Guiana
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)
French Guiana Temperatures (Celsius)
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)
French Guiana Perceived Temperature (C)
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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
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.
Snow on the Ground
The graph below shows the average snow on the ground in French Guiana (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
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.
The graph below shows wind speed (max and average) in knots.
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||3.2||Barely noticeable||7.6||Gentle breeze|
|Feb||3.4||Barely noticeable||7.6||Gentle breeze|
|Mar||3.6||Barely noticeable||7.9||Gentle breeze|
|Apr||3.3||Barely noticeable||7.6||Gentle breeze|
|May||2.5||Barely noticeable||6.6||Gentle breeze|
|Jun||2.2||Barely noticeable||6.3||Light breeze|
|Jul||2.1||Barely noticeable||6.2||Gentle breeze|
|Aug||2.5||Barely noticeable||6.5||Light breeze|
|Sep||2.8||Barely noticeable||6.9||Gentle breeze|
|Oct||2.9||Barely noticeable||7.2||Gentle breeze|
|Nov||2.9||Barely noticeable||7.3||Gentle breeze|
|Dec||3||Barely noticeable||7.7||Gentle breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
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
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