# Climate Insights for Cayenne

*Source: [Airpult](https://airpult.com/climate/gf/cayenne/3417809644): Guyane, Guyane, French Guiana*

The climate in Cayenne is hot. The average annual temperature is 27°C and approximately 3064mm of precipitation falls per year. Cayenne receives a notable amount of rainfall throughout the year, including during its driest month. Cayenne sits near the equator, so seasonal temperature differences are minimal throughout the year.

## Key insights

- **Hottest month:** September (peak 31°C)
- **Coldest month:** June (low 25°C)
- **Wettest month:** May (570 mm)

## Monthly climate data

The table below shows monthly climate averages for Cayenne based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

| Month | Avg low (°C) | Avg high (°C) | Mean (°C) | Precip (mm) | Wind (km/h) | Snow (cm) |
| --- | ---: | ---: | ---: | ---: | ---: | ---: |
| Jan | 25 | 28 | 26 | 290 | 18 | 0 |
| Feb | 25 | 27 | 26 | 287 | 20 | 0 |
| Mar | 25 | 28 | 26 | 228 | 19 | 0 |
| Apr | 25 | 28 | 27 | 398 | 17 | 0 |
| May | 25 | 28 | 26 | 570 | 15 | 0 |
| Jun | 25 | 28 | 26 | 396 | 12 | 0 |
| Jul | 25 | 29 | 27 | 231 | 11 | 0 |
| Aug | 25 | 30 | 27 | 75 | 13 | 0 |
| Sep (current) | 26 | 31 | 28 | 36 | 15 | 0 |
| Oct | 26 | 30 | 28 | 50 | 15 | 0 |
| Nov | 25 | 29 | 27 | 175 | 15 | 0 |
| Dec | 25 | 28 | 26 | 329 | 17 | 0 |

## Temperature

Cayenne has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is September, when average highs reach 31°C and the mean temperature sits around 28°C. June is the coolest month, with minimum temperatures around 25°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.

## Precipitation

Cayenne is a very wet location, receiving approximately 3064mm of precipitation annually, which averages out to around 255mm per month. The wettest month is May, averaging 570mm of rainfall. April and June also tend to see above-average precipitation. The driest month is September, with just 36mm. That's 533mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

## Wind

Cayenne is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 20km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 9km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 18km/h in winter, 17km/h in spring, 12km/h in summer, 15km/h in autumn.

## Seasons

Currently it is **summer** (astronomical) / **fall** (meteorological) in Cayenne.
Autumn begins September 23, 2026 (1 days from now).

| Season | Begins |
| --- | --- |
| Spring | March 20 |
| Summer | June 21 |
| Autumn | September 23 |
| Winter | December 21 |

It is currently summer in Cayenne, which began on June 21, 2026. Cayenne sits near the equator, so the traditional four-season cycle is less pronounced. Temperatures remain relatively stable year-round. The warmest period peaks in September at around 31°C, while the coldest stretch bottoms out in June near 25°C. Autumn is next, beginning on September 23, 2026 (1 days from now).

### Spring

Temperatures range from 25 to 28°C. Rainfall is heavy, totalling around 1196mm across the season with a monthly average of 399mm. Winds are moderate at around 17km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

### Summer

Temperatures range from 25 to 30°C. Rainfall is heavy, totalling around 701mm across the season with a monthly average of 234mm. Winds are generally light, averaging 12km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.

### Autumn

Temperatures range from 25 to 31°C. Precipitation is moderate at around 261mm for the season, averaging 87mm per month. Winds are generally light, averaging 15km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

### Winter

Temperatures range from 25 to 28°C. Rainfall is heavy, totalling around 906mm across the season with a monthly average of 302mm. Winds are moderate at around 18km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.