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Contents
- The climate of Cayenne
- The best time to visit Cayenne
- The worst time to visit Cayenne
- Spring weather in Cayenne
- Summer weather in Cayenne
- Autumn weather in Cayenne
- Winter weather in Cayenne
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
Palm trees in a botanical garden in Cayenne, French Guiana
The climate of Cayenne
Cayenne, the capital of French Guiana, experiences a Tropical rainforest climate according to the Köppen climate classification (Af). The monthly averages reveal a remarkable consistency in climatic conditions throughout the year, with very little fluctuation in vital parameters.
Temperatures in Cayenne display a narrow band of variation, with the highest average monthly readings oscillating from 29.1°C (84.4°F) to 32.2°C (90°F). In contrast, the lowest average monthly temperatures range narrowly from 22.2°C (72°F) to 23.7°C (74.7°F). Rainfall paints a more variable picture with measurement varying from 56mm (2.2") to a robust 579mm (22.8") monthly average, emphasizing the tropical nature of the region.
Sunny hours vary considerably throughout the year, with impressive 8.5 hours in September, dwindling to a mere 3 hours in January. These weather patterns coincide with an average UV index that often reaches 12, an extreme level, underscoring the need for sun protection in Cayenne.
Temperatures in Cayenne display a narrow band of variation, with the highest average monthly readings oscillating from 29.1°C (84.4°F) to 32.2°C (90°F). In contrast, the lowest average monthly temperatures range narrowly from 22.2°C (72°F) to 23.7°C (74.7°F). Rainfall paints a more variable picture with measurement varying from 56mm (2.2") to a robust 579mm (22.8") monthly average, emphasizing the tropical nature of the region.
Sunny hours vary considerably throughout the year, with impressive 8.5 hours in September, dwindling to a mere 3 hours in January. These weather patterns coincide with an average UV index that often reaches 12, an extreme level, underscoring the need for sun protection in Cayenne.
The best time to visit Cayenne
Careful consideration of weather conditions is vital to ascertain the best time to visit Cayenne. Given the tropical climate and extreme UV levels, periods of lower rainfall and ample sunshine hours could provide the best conditions for a visit. Taking these factors into account, the months from August to October emerge as potentially favourable. During this time, rainfall diminishes considerably to between 56mm (2.2") and 144mm (5.67"), while sunshine increases to between 7.4 hours and 8.5 hours per day.
The worst time to visit Cayenne
The worst time to visit Cayenne would be when climatic conditions are least favourable for outdoor activities. This would be during the months experiencing the most rainfall and lowest amounts of sunshine. Considering these parameters, May stands out, being the wettest month, receiving on an average 579mm (22.8") of rainfall coupled with only 3.8 hours of sunshine.
Spring weather in Cayenne
In Cayenne, observing a traditional spring season as known in temperate regions becomes challenging due to its tropical rainforest climate. However, the months from March to May can be classified as a spring period. During this time, average high temperatures range from 29.6°C (85.3°F) to 29.9°C (85.8°F) and low temperatures between 22.4°C (72.3°F) and 23.7°C (74.7°F). Rainfall takes an upward trend towards May, culminating in an average of 579mm (22.8"), with an accompanying increase in rainy days.
Summer weather in Cayenne
The summer months from June to August in Cayenne signal the advent of slightly warmer temperatures and varied rainfall. Average high temperatures climb gradually to reach between 30.2°C (86.4°F) to 31.6°C (88.9°F). Simultaneously, low temperatures range from 22.4°C (72.3°F) to 22.9°C (73.2°F). Interestingly, despite the increase in temperatures, rainfall appears to diminish over these months, falling from 411mm (16.18") in June to 144mm (5.67") in August.
Autumn weather in Cayenne
September to November is considered the autumn period for Cayenne. During this phase, the region experiences its highest average temperatures, peaking between 31.6°C (88.9°F) and 32.2°C (90°F). Accompanying this rise, rainfall remains on the lower end of the spectrum from 56mm (2.2") to 133mm (5.24"). Hours of daylight start to reduce gradually from an average of 12.1 hours in September to 11.9 hours in November.
Winter weather in Cayenne
Unlike the winter season in colder climates, Cayenne's winter season from December to February is characterized by consistently high temperatures and elevated rainfall. Average high temperatures fluctuate from 30.1°C (86.2°F) to 29.2°C (84.6°F), while average lows oscillate between 22.3°C (72.1°F) to 23.4°C (74.1°F). Alongside these temperatures, rainfall increases from 341mm (13.43") in December to reach 451mm (17.76") in February.
Weather in January
Following the virtue of being the initial month of the year, January in Cayenne, French Guiana, manifests the onset of the wet season. Precipitation rates are high as the atmosphere fills with thunderstorms and steady showers. However, the weather avoids remaining monotonously rainy as the sun reveals itself for some hours per day. Weather in January »
Weather in February
In Cayenne, French Guiana, the weather in February reveals slight shifts in the climate. Hot and rainfall-laden trends from January persist, yet tropical thunderstorms lessen in frequency. The rainfall does not significantly disrupt the sea's temperature, continuing to invite individuals for a warm, relaxing swim. Weather in February »
Weather in March
The weather in March sustains the city’s tropical atmosphere with minimal temperature shifts from February. Although thunderstorms are common, conditions gradually transition away from the earlier high rainfall of the year. Sunbathing becomes more pleasurable as daylight duration expands and the sea’s warm temperature remains steady. Weather in March »
Weather in April
Sense the transition in Cayenne, French Guiana, as April brings some alterations. The sky remains frequently murky, yet the sunlight breaks through often, offering hours of brightness. The sea maintains its warm allure for swimmers and water sports enthusiasts. Weather in April »
Weather in May
Sheltering under an umbrella becomes a common sight as May clocks the highest rainfall for the year in Cayenne, French Guiana. It brings the wet season to its peak with intense rainy spells, although the temperature remains uniformly warm. Weather in May »
Weather in June
Cayenne, French Guiana, sees a decline in June's total rainfall as the wet season gradually recedes. Temperatures stay fairly constant, both on land and in the sea. The atmosphere showcases an intricate dance between thunderstorms and daylight hours. Weather in June »
Weather in July
July utters the first whispers of the dry season in Cayenne, French Guiana. The weather context subtly changes with slightly cooler nights and lengthening daylight hours. Even though episodes of rain persist, their frequency decreases compared to previous months. Weather in July »
Weather in August
In August, Cayenne, French Guiana, steps further into the realm of the dry season. The usually rainfall-rich climate observes exceptional changes. Clear skies, reduced thunderstorms, and increased sunshine hours bring more cheerful outdoors experiences. Weather in August »
Weather in September
September in Cayenne, French Guiana, is synonymous with the driest month. Though temperatures remain consistent, the reduced rainfall significantly changes the city's vibes. People enjoy more outdoor activities as sunshine hours peak and rainfall drops to its annual minimum. Weather in September »
Weather in October
As September’s spell fades, October in Cayenne, French Guiana, ushers in more moisture. Even though increased rainfall graces the city, the heavy downpours from the start of the year remain absent. The periodic showers bring fresher hues to the city's green landscapes. Weather in October »
Weather in November
Come November, frequent showers start to recall the forgotten wet season in Cayenne, French Guiana. The return of rainy days commences a change in seasonal patterns. While daylight starts to decrease slightly, the landscape benefits from a balanced combination of rain and sunshine. Weather in November »
Weather in December
Closing the year, December in Cayenne, French Guiana, revitalizes the city with a tropical festive mood. Wet season blues reoccur with increased rainfall, enveloping the atmosphere with moisture and maintaining fertile ground. Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Cayenne?
Cayenne, French Guiana, records the coldest temperatures in January, averaging a high of 29.1°C (84.4°F) and a low of 23.3°C (73.9°F).
How many days does it rain in Cayenne?
In Cayenne, during the entire year, the rain falls for 221.1 days and collects up to 3516mm (138.43") of precipitation.
What is the month with the least sunshine in Cayenne?
With an average of 3h of sunshine, January has the least sunshine of the year.
What is the month with the highest UV index in Cayenne?
The months with the highest UV index are January through June, August through November, with an average maximum UV index of 12.
What is the month with the coldest sea water in Cayenne?
With an average sea temperature of 27.3°C (81.1°F), February is the month with the coldest seawater.
What is the rainiest month in Cayenne?
May is the month with the most rainfall in Cayenne. Rain falls for 26.4 days and accumulates 579mm (22.8") of precipitation.
When are the longest days in Cayenne?
With an average of 12h and 24min of daylight, June has the longest days of the year in Cayenne.
What is the month with the lowest UV index in Cayenne?
July and December, with an average maximum UV index of 11, are months with the lowest UV index in Cayenne, French Guiana.
When is the sea warmest in Cayenne?
With an average sea temperature of 28.7°C (83.7°F), August is the month with the warmest seawater.
What is the driest month in Cayenne?
September is the month with the least rainfall. Rain falls for 7.1 days and accumulates 56mm (2.2") of precipitation.
What month has the most sunshine in Cayenne?
With an average of 8.5h of sunshine, September has the most sunshine of the year in Cayenne, French Guiana.
What part of the year is the hottest in Cayenne?
Cayenne's warmest weather arrives in October, when temperatures average a high of 32.2°C (90°F) and a low of 22.3°C (72.1°F).
What is the month with the shortest days in Cayenne?
The month with the shortest days in Cayenne, French Guiana, is December, with an average of 11h and 48min of daylight.
Is there Daylight Saving Time (DST) in Cayenne?
Cayenne does not observe Daylight Saving Time (DST). -03 timezone is used throughout the entire year.
Average temperature
Cayenne, French Guiana
The warmest month (with the highest average high temperature) is October (32.2°C).
The month with the lowest average high temperature is January (29.1°C).
The month with the highest average low temperature is April (23.7°C).
The coldest month (with the lowest average low temperature) is September (22.2°C).
Average rainfall
Cayenne, French Guiana
- Average rainfall in January:
451.2mm - Average rainfall in February:
309.4mm - Average rainfall in March:
334.3mm - Average rainfall in April:
448.4mm - Average rainfall in May:
579.4mm - Average rainfall in June:
411.4mm
- Average rainfall in July:
245.7mm - Average rainfall in August:
143.6mm - Average rainfall in September:
55.7mm - Average rainfall in October:
63.3mm - Average rainfall in November:
133.4mm - Average rainfall in December:
340.5mm
The wettest month (with the highest rainfall) is May (579.4mm).
The driest month (with the least rainfall) is September (55.7mm).
Average rainfall days
Cayenne, French Guiana
- Average rainfall days in January:
23.6 days - Average rainfall days in February:
20 days - Average rainfall days in March:
20.7 days - Average rainfall days in April:
22.2 days - Average rainfall days in May:
26.4 days - Average rainfall days in June:
25.2 days
- Average rainfall days in July:
20.6 days - Average rainfall days in August:
14.2 days - Average rainfall days in September:
7.1 days - Average rainfall days in October:
7.6 days - Average rainfall days in November:
11.9 days - Average rainfall days in December:
21.6 days
The month with the highest number of rainy days is May (26.4 days).
The month with the least rainy days is September (7.1 days).
Average sea temperature
Cayenne, French Guiana
The best month for swimming (with the highest average sea temperature) is August (28.7°C).
The coldest month (with the lowest average sea temperature) is February (27.3°C).
Average daylight / Average sunshine
Cayenne, French Guiana
- Average daylight in January:
11h and 5min - Average daylight in February:
12h and 0min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 1min - Average daylight in May:
12h and 2min - Average daylight in June:
12h and 2min
- Average daylight in July:
12h and 2min - Average daylight in August:
12h and 2min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 5min - Average daylight in December:
11h and 5min
The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 48min).
- Average sunshine in January:
3h and 0min - Average sunshine in February:
3h and 1min - Average sunshine in March:
3h and 5min - Average sunshine in April:
3h and 5min - Average sunshine in May:
3h and 5min - Average sunshine in June:
5h and 0min
- Average sunshine in July:
6h and 2min - Average sunshine in August:
7h and 2min - Average sunshine in September:
8h and 3min - Average sunshine in October:
8h and 1min - Average sunshine in November:
7h and 1min - Average sunshine in December:
4h and 2min
The month with the most sunshine is September (Average sunshine: 8h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average UV index
Cayenne, French Guiana
The months with the highest UV index are January, February, March, April, May, June, August, September, October and November (UV index 12).
The months with the lowest UV index are July and December (UV index 11).
Cayenne, French Guiana
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