Cayenne weather in April
In April, Cayenne sees average daytime highs of 28°C and overnight lows near 25°C, with 258 mm of rain across 25 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 13% of the time in April, and the air most often feels oppressive.
Daylight stretches from about 12 hours at the start of April to 12 h 12 min by month's end. Set against the rest of the year, April is Cayenne's 11th-clearest and 4th-windiest month. For the whole year in context, see Cayenne's year-round climate.
- Daytime high
- 28°
- 7th warmest
- Overnight low
- 25°
- 10th coldest
- Rainfall
- 258 mm
- 25 wet days
- Daylight
- 12 h 06 min
- 6:26 AM – 6:33 PM
- Cloud cover
- 72%
- 11th clearest
- Wind
- 18 km/h
- 4th windiest
- Solar energy
- 5.04 kWh/m²
- Travel score
- 4.0
- out of 10
Cayenne is commune and capital city of French Guiana.
- Density
- 2,608/km²
- people per km²
- Founded
- 1664
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Day-to-day highs hold fairly steady near 28°C through the month.
A typical April day in Cayenne reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, April runs on par with March and on par with May.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 25 |
| 2 | 28 | 25 |
| 3 | 28 | 25 |
| 4 | 28 | 25 |
| 5 | 28 | 25 |
| 6 | 28 | 25 |
| 7 | 28 | 25 |
| 8 | 28 | 25 |
| 9 | 28 | 25 |
| 10 | 28 | 25 |
| 11 | 28 | 25 |
| 12 | 28 | 25 |
| 13 | 28 | 25 |
| 14 | 28 | 25 |
| 15 | 28 | 25 |
| 16 | 28 | 25 |
| 17 | 28 | 25 |
| 18 | 28 | 25 |
| 19 | 28 | 25 |
| 20 | 28 | 25 |
| 21 | 28 | 25 |
| 22 | 28 | 25 |
| 23 | 28 | 25 |
| 24 | 28 | 25 |
| 25 | 28 | 25 |
| 26 | 28 | 25 |
| 27 | 28 | 25 |
| 28 | 28 | 25 |
| 29 | 28 | 25 |
| 30 | 28 | 25 |
How April really feels in Cayenne
Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Cayenne weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 25° | 244 | 26.6 | 11.7 | 4.0 |
| Feb | 27° / 25° | 205 | 22.3 | 11.8 | 4.2 |
| Mar | 28° / 25° | 173 | 23.9 | 12 | 4.3 |
| Apr | 28° / 25° | 258 | 25 | 12.1 | 4.0 |
| May | 28° / 25° | 411 | 29.1 | 12.2 | 3.5 |
| Jun | 28° / 25° | 344 | 28.5 | 12.3 | 3.5 |
| Jul | 29° / 25° | 186 | 24.8 | 12.3 | 4.0 |
| Aug | 30° / 25° | 67 | 13.9 | 12.2 | 5.0 |
| Sep | 30° / 25° | 23 | 7.2 | 12 | 5.5 |
| Oct | 30° / 25° | 40 | 10.1 | 11.9 | 5.1 |
| Nov | 29° / 25° | 122 | 19.6 | 11.8 | 4.2 |
| Dec | 28° / 25° | 253 | 26.5 | 11.7 | 3.8 |
Cloud cover in April
The sky is clear or mostly clear about 13% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 19% of April, with mostly cloudy or overcast conditions the remaining 68%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 31 | 31 | 31 | 32 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 29 |
| Cloudier (%) | 66 | 66 | 66 | 67 | 67 | 67 | 67 | 67 | 67 | 68 | 68 | 69 | 69 | 69 | 68 | 67 | 67 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 71 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 34 | 66 |
| 2 | 34 | 66 |
| 3 | 34 | 66 |
| 4 | 33 | 67 |
| 5 | 33 | 67 |
| 6 | 33 | 67 |
| 7 | 33 | 67 |
| 8 | 33 | 67 |
| 9 | 33 | 67 |
| 10 | 32 | 68 |
| 11 | 32 | 68 |
| 12 | 31 | 69 |
| 13 | 31 | 69 |
| 14 | 31 | 69 |
| 15 | 32 | 68 |
| 16 | 33 | 67 |
| 17 | 33 | 67 |
| 18 | 32 | 68 |
| 19 | 32 | 68 |
| 20 | 32 | 68 |
| 21 | 32 | 68 |
| 22 | 32 | 68 |
| 23 | 32 | 68 |
| 24 | 32 | 68 |
| 25 | 32 | 68 |
| 26 | 31 | 69 |
| 27 | 31 | 69 |
| 28 | 31 | 69 |
| 29 | 31 | 69 |
| 30 | 29 | 71 |
Chance of precipitation in April
Cayenne gets around 258 mm of rain over 25 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 83% and peaks near 88% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 78 | 79 | 79 | 79 | 80 | 80 | 80 | 81 | 81 | 81 | 81 | 82 | 82 | 82 | 82 | 83 | 83 | 84 | 84 | 84 | 85 | 85 | 86 | 86 | 87 | 87 | 88 | 88 | 88 | 88 |
| Rain chance (%) | |
|---|---|
| 1 | 78 |
| 2 | 79 |
| 3 | 79 |
| 4 | 79 |
| 5 | 80 |
| 6 | 80 |
| 7 | 80 |
| 8 | 81 |
| 9 | 81 |
| 10 | 81 |
| 11 | 81 |
| 12 | 82 |
| 13 | 82 |
| 14 | 82 |
| 15 | 82 |
| 16 | 83 |
| 17 | 83 |
| 18 | 84 |
| 19 | 84 |
| 20 | 84 |
| 21 | 85 |
| 22 | 85 |
| 23 | 86 |
| 24 | 86 |
| 25 | 87 |
| 26 | 87 |
| 27 | 88 |
| 28 | 88 |
| 29 | 88 |
| 30 | 88 |
Humidity in April
Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the oppressive band about 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Oppressive (%) | 87 | 86 | 86 | 86 | 86 | 85 | 85 | 84 | 84 | 83 | 84 | 83 | 83 | 82 | 82 | 81 | 81 | 80 | 80 | 80 | 80 | 80 | 79 | 79 | 78 | 77 | 76 | 75 | 74 | 73 |
| Miserable (%) | 10 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 20 | 20 | 21 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 3 | 87 | 10 |
| 2 | 3 | 86 | 11 |
| 3 | 3 | 86 | 11 |
| 4 | 2 | 86 | 12 |
| 5 | 2 | 86 | 12 |
| 6 | 2 | 85 | 13 |
| 7 | 2 | 85 | 13 |
| 8 | 2 | 84 | 14 |
| 9 | 2 | 84 | 14 |
| 10 | 2 | 83 | 15 |
| 11 | 1 | 84 | 15 |
| 12 | 1 | 83 | 16 |
| 13 | 1 | 83 | 16 |
| 14 | 1 | 82 | 17 |
| 15 | 1 | 82 | 17 |
| 16 | 1 | 81 | 18 |
| 17 | 1 | 81 | 18 |
| 18 | 1 | 80 | 19 |
| 19 | 1 | 80 | 19 |
| 20 | 1 | 80 | 19 |
| 21 | 0 | 80 | 20 |
| 22 | 0 | 80 | 20 |
| 23 | 0 | 79 | 21 |
| 24 | 0 | 79 | 21 |
| 25 | 0 | 78 | 22 |
| 26 | 0 | 77 | 23 |
| 27 | 0 | 76 | 24 |
| 28 | 0 | 75 | 25 |
| 29 | 0 | 74 | 26 |
| 30 | 0 | 73 | 27 |
Wind in April
Winds average 18 km/h in April.
Across April, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 19 | light breeze |
| 2 | 19 | light breeze |
| 3 | 18 | light breeze |
| 4 | 18 | light breeze |
| 5 | 18 | light breeze |
| 6 | 18 | light breeze |
| 7 | 18 | light breeze |
| 8 | 18 | light breeze |
| 9 | 18 | light breeze |
| 10 | 18 | light breeze |
| 11 | 18 | light breeze |
| 12 | 18 | light breeze |
| 13 | 18 | light breeze |
| 14 | 18 | light breeze |
| 15 | 18 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 17 | light breeze |
| 24 | 17 | light breeze |
| 25 | 17 | light breeze |
| 26 | 17 | light breeze |
| 27 | 17 | light breeze |
| 28 | 17 | light breeze |
| 29 | 17 | light breeze |
| 30 | 17 | light breeze |
Sunrise & sunset in April
Daylight runs from about 12 hours at the start of April to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over April. Sunrise moves from 6:33 AM to 6:22 AM, and sunset from 6:35 PM to 6:32 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 |
| Sunrise (AM) | 6:33 | 6:32 | 6:32 | 6:31 | 6:31 | 6:31 | 6:30 | 6:30 | 6:29 | 6:29 | 6:28 | 6:28 | 6:28 | 6:27 | 6:27 | 6:26 | 6:26 | 6:26 | 6:25 | 6:25 | 6:24 | 6:24 | 6:24 | 6:23 | 6:23 | 6:23 | 6:23 | 6:22 | 6:22 | 6:22 |
| Sunset (PM) | 6:35 | 6:35 | 6:35 | 6:35 | 6:34 | 6:34 | 6:34 | 6:34 | 6:34 | 6:34 | 6:34 | 6:33 | 6:33 | 6:33 | 6:33 | 6:33 | 6:33 | 6:33 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 | 6:32 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.0 | 6:33 | 6:35 |
| 2 | 12.0 | 6:32 | 6:35 |
| 3 | 12.0 | 6:32 | 6:35 |
| 4 | 12.1 | 6:31 | 6:35 |
| 5 | 12.1 | 6:31 | 6:34 |
| 6 | 12.1 | 6:31 | 6:34 |
| 7 | 12.1 | 6:30 | 6:34 |
| 8 | 12.1 | 6:30 | 6:34 |
| 9 | 12.1 | 6:29 | 6:34 |
| 10 | 12.1 | 6:29 | 6:34 |
| 11 | 12.1 | 6:28 | 6:34 |
| 12 | 12.1 | 6:28 | 6:33 |
| 13 | 12.1 | 6:28 | 6:33 |
| 14 | 12.1 | 6:27 | 6:33 |
| 15 | 12.1 | 6:27 | 6:33 |
| 16 | 12.1 | 6:26 | 6:33 |
| 17 | 12.1 | 6:26 | 6:33 |
| 18 | 12.1 | 6:26 | 6:33 |
| 19 | 12.1 | 6:25 | 6:32 |
| 20 | 12.1 | 6:25 | 6:32 |
| 21 | 12.1 | 6:24 | 6:32 |
| 22 | 12.1 | 6:24 | 6:32 |
| 23 | 12.1 | 6:24 | 6:32 |
| 24 | 12.1 | 6:23 | 6:32 |
| 25 | 12.1 | 6:23 | 6:32 |
| 26 | 12.2 | 6:23 | 6:32 |
| 27 | 12.2 | 6:23 | 6:32 |
| 28 | 12.2 | 6:22 | 6:32 |
| 29 | 12.2 | 6:22 | 6:32 |
| 30 | 12.2 | 6:22 | 6:32 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 5.04 kWh/m².
For context, solar energy here swings from a low near 4.48 kWh/m² to a high of 6.26 kWh/m² in September across the year — April's 5.04 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 4.8 | 4.8 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.2 | Bright |
| 2 | 5.2 | Bright |
| 3 | 5.2 | Bright |
| 4 | 5.2 | Bright |
| 5 | 5.2 | Bright |
| 6 | 5.2 | Bright |
| 7 | 5.2 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.1 | Bright |
| 10 | 5.1 | Bright |
| 11 | 5.1 | Bright |
| 12 | 5.1 | Bright |
| 13 | 5.1 | Bright |
| 14 | 5.1 | Bright |
| 15 | 5.1 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.0 | Bright |
| 20 | 5.0 | Bright |
| 21 | 5.0 | Bright |
| 22 | 5.0 | Bright |
| 23 | 5.0 | Bright |
| 24 | 4.9 | Bright |
| 25 | 4.9 | Bright |
| 26 | 4.9 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
Hazard calendar for Cayenne
In April, Cayenne sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Cayenne's rainy season runs April–July, when most of the year's rain falls.
Is April a good time to visit Cayenne?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a reasonable time to visit Cayenne for sightseeing.
What to pack for Cayenne in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Cayenne sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.
Sea temperature near Cayenne in April
The nearest coast averages about 27°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 21 km away) is warmest in July at about 28°C and coldest in January near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Warm | Tropical | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 28 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 28 | Warm |
| Oct | 28 | Tropical |
| Nov | 28 | Warm |
| Dec | 27 | Warm |
UV index in Cayenne in April
Clear-sky midday UV in April peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Cayenne peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (extreme).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 13 | 14 | 14 | 13 | 11 | 11 | 11 | 12 | 12 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Extreme |
Air quality in Cayenne in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in Cayenne is worst in February — around 28 µg/m³ PM2.5 (moderate), about 4.0× the cleanest month (August, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 26 | 28 | 26 | 26 | 21 | 12 | 8 | 7 | 8 | 10 | 12 | 21 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 26 | Moderate |
| Feb | 28 | Moderate |
| Mar | 26 | Moderate |
| Apr | 26 | Moderate |
| May | 21 | Moderate |
| Jun | 12 | Moderate |
| Jul | 8 | Good |
| Aug | 7 | Good |
| Sep | 8 | Good |
| Oct | 10 | Good |
| Nov | 12 | Good |
| Dec | 21 | Moderate |
Where is Cayenne?
Cayenne sits at 4.9°N, 52.3°W, 7 m above sea level, in French Guiana. The nearest listed city is Rémire-Montjoly, 8.0 km away.
Topography around Cayenne
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cayenne.
Within 3 km, the terrain around Cayenne has only modest variations in elevation — a maximum elevation change of 84 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 250 m; within 80 km, significant variations in elevation — a maximum elevation change of 487 m.
The land around Cayenne is covered by water (58%) and artificial surfaces (20%) within 3 km, water (55%) and trees (30%) within 16 km, and trees (53%) and water (41%) within 80 km.
French Guiana travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E
- 220 V · 50 Hz
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Cayenne (4.9381°, -52.3346°, elevation 7 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).