Average annual temperature is 25.6 °C
Absolute maximum temperature: 37.3 °C
Absolute minimum temperature: 19.5 °C
Number of sunny days: 42 days
Number of rainy days: 323 days
Look at detailed online map of Grand Marquis
* Weather data for Grand Marquis French Guiana is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 30.6 | 30.5 | 32.2 | 31.8 | 32.5 | 31.6 | 32.1 | 36.1 | 36.6 | 37.3 | 35.8 | 33.1 |
| Average daytime temperature (°C) | 28.0 | 27.4 | 29.6 | 29.4 | 30.3 | 30.4 | 30.3 | 33.0 | 34.8 | 35.1 | 33.4 | 31.2 |
| Average temperature (°C) | 23.5 | 23.4 | 24.6 | 24.5 | 25.1 | 25.1 | 25.2 | 26.9 | 27.9 | 28.3 | 27.0 | 25.7 |
| Average night temperature (°C) | 21.3 | 21.7 | 21.6 | 22.0 | 22.6 | 22.2 | 22.1 | 22.3 | 22.6 | 23.1 | 23.2 | 22.8 |
| Absolute minimum temperature (°C) | 19.5 | 21.1 | 20.3 | 20.6 | 21.4 | 21.0 | 21.4 | 20.9 | 20.9 | 22.0 | 22.2 | 21.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.9 | 12.0 | 12.1 | 12.2 | 12.3 | 12.3 | 12.3 | 12.2 | 12.1 | 12.0 | 12.0 | 11.9 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 6.6 | 5.2 | 8.7 | 7.1 | 7.7 | 9.4 | 9.8 | 10.9 | 10.7 | 10.7 | 10.3 | 9.2 |
| Precipitation (mm) | 440 | 539 | 257 | 298 | 324 | 215 | 167 | 62 | 35 | 23 | 72 | 131 |
| Sunny days | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 8 | 12 | 14 | 3 | 0 |
| Rainy days | 30 | 28 | 30 | 29 | 31 | 29 | 30 | 23 | 18 | 17 | 27 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grand Marquis is at