Cayenne weather in October
In October, Cayenne sees average daytime highs of 30°C and overnight lows near 25°C, with 40 mm of rain across 10.1 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 54% of the time in October, and the air most often feels oppressive.
Daylight stretches from about 12 hours at the start of October to 11 h 48 min by month's end. Set against the rest of the year, October is Cayenne's 3rd-clearest and 7th-windiest month. For the whole year in context, see Cayenne's year-round climate.
- Daytime high
- 30°
- 1st warmest
- Overnight low
- 25°
- 12th coldest
- Rainfall
- 40 mm
- 10.1 wet days
- Daylight
- 11 h 54 min
- 6:18 AM – 6:11 PM
- Cloud cover
- 43%
- 3rd clearest
- Wind
- 15 km/h
- 7th windiest
- Solar energy
- 6.1 kWh/m²
- Travel score
- 5.1
- 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 October
Day-to-day highs hold fairly steady near 30°C through the month.
A typical October day in Cayenne reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, October runs on par with September and about 1°C warmer than November.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| 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 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 25 |
| 2 | 30 | 25 |
| 3 | 30 | 25 |
| 4 | 30 | 25 |
| 5 | 30 | 25 |
| 6 | 30 | 25 |
| 7 | 30 | 25 |
| 8 | 30 | 25 |
| 9 | 30 | 25 |
| 10 | 30 | 25 |
| 11 | 30 | 25 |
| 12 | 30 | 25 |
| 13 | 30 | 25 |
| 14 | 30 | 25 |
| 15 | 30 | 25 |
| 16 | 30 | 25 |
| 17 | 30 | 25 |
| 18 | 30 | 25 |
| 19 | 30 | 25 |
| 20 | 30 | 25 |
| 21 | 30 | 25 |
| 22 | 30 | 25 |
| 23 | 30 | 25 |
| 24 | 30 | 25 |
| 25 | 30 | 25 |
| 26 | 30 | 25 |
| 27 | 30 | 25 |
| 28 | 30 | 25 |
| 29 | 30 | 25 |
| 30 | 30 | 25 |
| 31 | 30 | 25 |
How October really feels in Cayenne
Once humidity and wind are folded in, October averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Cayenne weather by month
How October compares with the rest of the year at a glance. October is the 1st-warmest and 11th-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 October
The sky is clear or mostly clear about 54% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 20% of October, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to cloud over as the month goes on.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 81 | 80 | 80 | 79 | 79 | 79 | 78 | 77 | 77 | 77 | 77 | 76 | 76 | 75 | 75 | 75 | 75 | 74 | 74 | 74 | 73 | 72 | 71 | 70 | 69 | 68 | 66 | 65 | 64 | 63 | 62 |
| Cloudier (%) | 19 | 20 | 20 | 21 | 21 | 21 | 22 | 23 | 23 | 23 | 23 | 24 | 24 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 34 | 35 | 36 | 37 | 38 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 81 | 19 |
| 2 | 80 | 20 |
| 3 | 80 | 20 |
| 4 | 79 | 21 |
| 5 | 79 | 21 |
| 6 | 79 | 21 |
| 7 | 78 | 22 |
| 8 | 77 | 23 |
| 9 | 77 | 23 |
| 10 | 77 | 23 |
| 11 | 77 | 23 |
| 12 | 76 | 24 |
| 13 | 76 | 24 |
| 14 | 75 | 25 |
| 15 | 75 | 25 |
| 16 | 75 | 25 |
| 17 | 75 | 25 |
| 18 | 74 | 26 |
| 19 | 74 | 26 |
| 20 | 74 | 26 |
| 21 | 73 | 27 |
| 22 | 72 | 28 |
| 23 | 71 | 29 |
| 24 | 70 | 30 |
| 25 | 69 | 31 |
| 26 | 68 | 32 |
| 27 | 66 | 34 |
| 28 | 65 | 35 |
| 29 | 64 | 36 |
| 30 | 63 | 37 |
| 31 | 62 | 38 |
Chance of precipitation in October
Cayenne gets around 40 mm of rain over 10.1 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 33% and peaks near 49% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 32 | 33 | 34 | 35 | 37 | 38 | 40 | 42 | 43 | 45 | 47 | 49 |
| Rain chance (%) | |
|---|---|
| 1 | 26 |
| 2 | 26 |
| 3 | 27 |
| 4 | 27 |
| 5 | 28 |
| 6 | 28 |
| 7 | 28 |
| 8 | 29 |
| 9 | 29 |
| 10 | 29 |
| 11 | 29 |
| 12 | 29 |
| 13 | 29 |
| 14 | 29 |
| 15 | 29 |
| 16 | 30 |
| 17 | 30 |
| 18 | 31 |
| 19 | 31 |
| 20 | 32 |
| 21 | 33 |
| 22 | 34 |
| 23 | 35 |
| 24 | 37 |
| 25 | 38 |
| 26 | 40 |
| 27 | 42 |
| 28 | 43 |
| 29 | 45 |
| 30 | 47 |
| 31 | 49 |
Humidity in October
Most of October feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the oppressive band about 91% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oppressive (%) | 96 | 95 | 95 | 94 | 94 | 94 | 93 | 93 | 93 | 93 | 92 | 92 | 92 | 92 | 92 | 91 | 91 | 91 | 91 | 90 | 90 | 89 | 89 | 88 | 88 | 87 | 87 | 86 | 85 | 84 | 83 |
| Miserable (%) | 4 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 15 | 16 | 17 |
| Oppressive (%) | Miserable (%) | |
|---|---|---|
| 1 | 96 | 4 |
| 2 | 95 | 5 |
| 3 | 95 | 5 |
| 4 | 94 | 6 |
| 5 | 94 | 6 |
| 6 | 94 | 6 |
| 7 | 93 | 7 |
| 8 | 93 | 7 |
| 9 | 93 | 7 |
| 10 | 93 | 7 |
| 11 | 92 | 8 |
| 12 | 92 | 8 |
| 13 | 92 | 8 |
| 14 | 92 | 8 |
| 15 | 92 | 8 |
| 16 | 91 | 9 |
| 17 | 91 | 9 |
| 18 | 91 | 9 |
| 19 | 91 | 9 |
| 20 | 90 | 10 |
| 21 | 90 | 10 |
| 22 | 89 | 11 |
| 23 | 89 | 11 |
| 24 | 88 | 12 |
| 25 | 88 | 12 |
| 26 | 87 | 13 |
| 27 | 87 | 13 |
| 28 | 86 | 14 |
| 29 | 85 | 15 |
| 30 | 84 | 16 |
| 31 | 83 | 17 |
Wind in October
Winds average 15 km/h in October.
Across October, daily wind ranges from about 15 km/h on the calmest days to 15 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| 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 | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 15 | light breeze |
| 2 | 15 | light breeze |
| 3 | 15 | light breeze |
| 4 | 15 | light breeze |
| 5 | 15 | light breeze |
| 6 | 15 | light breeze |
| 7 | 15 | light breeze |
| 8 | 15 | light breeze |
| 9 | 15 | light breeze |
| 10 | 15 | light breeze |
| 11 | 15 | light breeze |
| 12 | 15 | light breeze |
| 13 | 15 | light breeze |
| 14 | 15 | light breeze |
| 15 | 15 | light breeze |
| 16 | 15 | light breeze |
| 17 | 15 | light breeze |
| 18 | 15 | light breeze |
| 19 | 15 | light breeze |
| 20 | 15 | light breeze |
| 21 | 15 | light breeze |
| 22 | 15 | light breeze |
| 23 | 15 | light breeze |
| 24 | 15 | light breeze |
| 25 | 15 | light breeze |
| 26 | 15 | light breeze |
| 27 | 15 | light breeze |
| 28 | 15 | light breeze |
| 29 | 15 | light breeze |
| 30 | 15 | light breeze |
| 31 | 15 | light breeze |
Sunrise & sunset in October
Daylight runs from about 12 hours at the start of October to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 12 minutes over October. Sunrise moves from 6:20 AM to 6:18 AM, and sunset from 6:17 PM to 6:08 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 |
| Sunrise (AM) | 6:20 | 6:19 | 6:19 | 6:19 | 6:19 | 6:19 | 6:19 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 | 6:18 |
| Sunset (PM) | 6:17 | 6:17 | 6:16 | 6:16 | 6:15 | 6:15 | 6:14 | 6:14 | 6:14 | 6:13 | 6:13 | 6:12 | 6:12 | 6:12 | 6:11 | 6:11 | 6:11 | 6:10 | 6:10 | 6:10 | 6:10 | 6:09 | 6:09 | 6:09 | 6:09 | 6:08 | 6:08 | 6:08 | 6:08 | 6:08 | 6:08 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.0 | 6:20 | 6:17 |
| 2 | 12.0 | 6:19 | 6:17 |
| 3 | 11.9 | 6:19 | 6:16 |
| 4 | 11.9 | 6:19 | 6:16 |
| 5 | 11.9 | 6:19 | 6:15 |
| 6 | 11.9 | 6:19 | 6:15 |
| 7 | 11.9 | 6:19 | 6:14 |
| 8 | 11.9 | 6:18 | 6:14 |
| 9 | 11.9 | 6:18 | 6:14 |
| 10 | 11.9 | 6:18 | 6:13 |
| 11 | 11.9 | 6:18 | 6:13 |
| 12 | 11.9 | 6:18 | 6:12 |
| 13 | 11.9 | 6:18 | 6:12 |
| 14 | 11.9 | 6:18 | 6:12 |
| 15 | 11.9 | 6:18 | 6:11 |
| 16 | 11.9 | 6:18 | 6:11 |
| 17 | 11.9 | 6:18 | 6:11 |
| 18 | 11.9 | 6:18 | 6:10 |
| 19 | 11.9 | 6:18 | 6:10 |
| 20 | 11.9 | 6:18 | 6:10 |
| 21 | 11.9 | 6:18 | 6:10 |
| 22 | 11.9 | 6:18 | 6:09 |
| 23 | 11.9 | 6:18 | 6:09 |
| 24 | 11.9 | 6:18 | 6:09 |
| 25 | 11.9 | 6:18 | 6:09 |
| 26 | 11.8 | 6:18 | 6:08 |
| 27 | 11.8 | 6:18 | 6:08 |
| 28 | 11.8 | 6:18 | 6:08 |
| 29 | 11.8 | 6:18 | 6:08 |
| 30 | 11.8 | 6:18 | 6:08 |
| 31 | 11.8 | 6:18 | 6:08 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 6.1 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 — October's 6.1 kWh/m² sits near the top of that range.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.7 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.3 | Intense |
| 2 | 6.3 | Intense |
| 3 | 6.3 | Intense |
| 4 | 6.3 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.2 | Intense |
| 10 | 6.2 | Intense |
| 11 | 6.2 | Intense |
| 12 | 6.2 | Intense |
| 13 | 6.2 | Intense |
| 14 | 6.2 | Intense |
| 15 | 6.1 | Intense |
| 16 | 6.1 | Intense |
| 17 | 6.1 | Intense |
| 18 | 6.1 | Intense |
| 19 | 6.1 | Intense |
| 20 | 6.1 | Intense |
| 21 | 6.0 | Intense |
| 22 | 6.0 | Intense |
| 23 | 6.0 | Bright |
| 24 | 6.0 | Bright |
| 25 | 5.9 | Bright |
| 26 | 5.9 | Bright |
| 27 | 5.9 | Bright |
| 28 | 5.8 | Bright |
| 29 | 5.8 | Bright |
| 30 | 5.8 | Bright |
| 31 | 5.7 | Bright |
Hazard calendar for Cayenne
None of Cayenne's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Cayenne's rainy season runs April–July, when most of the year's rain falls.
Is October a good time to visit Cayenne?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a reasonable time to visit Cayenne for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Cayenne in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Cayenne sees daytime highs around 30°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.
Sea temperature near Cayenne in October
The nearest coast averages about 28°C in October — 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 October
Clear-sky midday UV in October peaks around 12 (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 October
Average fine-particle pollution (PM2.5) through the year — so you can see where October 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).