The best times to visit Cayenne for ideal weather are

August 20th 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 Cayenne Travel Info

Weather in Cayenne


Average temperatures in Cayenne 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 5th 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 Cayenne, 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 91.6°F (33.1°C) with temperatures rarely dropping below 72.6°F (22.6°C) at night.

Cayenne Temperatures (Fahrenheit)


Cayenne 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.

Cayenne Perceived Temperature (F)


Cayenne Perceived Temperature (C)



Average Cayenne 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 85.9 78.3 73.2
Feb 85.3 78.2 73.7
Mar 86.5 79.3 74.4
Apr 87.2 79.5 74.5
May 87.1 78.4 73.1
Jun 87.8 77.5 71.3
Jul 88.8 78.1 71.5
Aug 90.2 79.6 71.9
Sep 91.1 80.6 72.4
Oct 91.3 80.7 72.4
Nov 90 79.8 71.9
Dec 87.6 78.3 72

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 29.9 25.7 22.9
Feb 29.6 25.7 23.2
Mar 30.3 26.3 23.6
Apr 30.7 26.4 23.6
May 30.6 25.8 22.8
Jun 31 25.3 21.8
Jul 31.6 25.6 21.9
Aug 32.3 26.4 22.2
Sep 32.8 27 22.4
Oct 32.9 27.1 22.4
Nov 32.2 26.6 22.2
Dec 30.9 25.7 22.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Cayenne 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 late August to early September. For example, on the week of August 27th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid February with an average of 6 days of significant precipitation the week of February 19th.

When can you find snow in Cayenne? 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 Cayenne.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 61% 0 15.6
Feb 66% 0 17.6
Mar 56% 0 13.5
Apr 59% 0 15.5
May 70% 0 22.3
Jun 71% 0 14.9
Jul 53% 0 10.9
Aug 30% 0 5.4
Sep 14% 0 2.3
Oct 16% 0 2.9
Nov 29% 0 4.5
Dec 56% 0 13.7

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 61 0 39.6
Feb 66 0 44.7
Mar 56 0 34.3
Apr 59 0 39.4
May 70 0 56.6
Jun 71 0 37.8
Jul 53 0 27.7
Aug 30 0 13.7
Sep 14 0 5.8
Oct 16 0 7.4
Nov 29 0 11.4
Dec 56 0 34.8


Humidity and Wind

Cayenne has some extremely humid months, and high humidity throughout the year. The least humid month is September (73.7% relative humidity), and the most humid month is May (82%).

Wind in Cayenne is usually calm. The windiest month is March, followed by February and January. March’s average wind speed of around 6.1 knots (7 MPH or 11.3 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid March where average top sustained speeds reach 14 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 5.8 Light breeze 13.1 Significant breeze
Feb 6 Light breeze 13.5 Significant breeze
Mar 6.1 Light breeze 13.5 Significant breeze
Apr 5.6 Light breeze 12.9 Significant breeze
May 4.3 Light breeze 11.5 Significant breeze
Jun 3.4 Barely noticeable 10.8 Gentle breeze
Jul 3 Barely noticeable 10.5 Significant breeze
Aug 3.7 Barely noticeable 11.1 Significant breeze
Sep 4.1 Light breeze 11.7 Significant breeze
Oct 4.1 Light breeze 11.7 Significant breeze
Nov 4.3 Light breeze 11.9 Significant breeze
Dec 4.7 Light breeze 12.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 80.3%
Feb 80.9%
Mar 78.6%
Apr 79.3%
May 82%
Jun 81.7%
Jul 80.6%
Aug 76.4%
Sep 73.7%
Oct 74%
Nov 76.6%
Dec 80.8%


Is it Safe to Travel to Cayenne?

Our best data indicates this area is generally safe. As of Dec 04, 2023 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 Oct 26, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Cayenne, 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 Cayenne 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

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 Cayenne Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 87.6°F (30.9°C) and 85.5°F (29.7°C) with similar temperatures in the later months. Rain is frequent with 17 to 22 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 21 days of precipitation per month. June – August is the busiest season for tourism in Cayenne, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 91.6°F (33.1°C) and 88.8°F (31.6°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 4 to 9 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 Cayenne to be enjoyable for warm weather travelers. The average high during this season is between 88.9°F (31.6°C) and 84.8°F (29.3°C). On average, it rains or snows a very great amount: 17 to 19 times per month. These times of year are fairly slow with tourists.


Best Times to TravelFrench Guiana › Cayenne, French Guiana