Saint-Laurent-du-Maroni, French Guiana Climate
The warmest month is October, with an average high of 32°C; the coldest is February, with an average low of 23°C. A normal year brings 2302 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 24
- Normal high
- 31°C
- Normal low
- 24°C
- Reanalysis high
- 33°Cin 2019
- Reanalysis low
- 22°Cin 1995
- Chance of a wet day
- 42%
- Daylight
- 12 h 06 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 28°C | 23°C | 32°C (2020) | 21°C (1992) | 229 mm | 24.8 |
| February | 29°C | 23°C | 32°C (2020) | 20°C (1995) | 192 mm | 22.6 |
| March | 29°C | 23°C | 34°C (2020) | 21°C (1997) | 167 mm | 21.7 |
| April | 29°C | 24°C | 33°C (1998) | 21°C (1997) | 279 mm | 24.0 |
| May | 28°C | 24°C | 31°C (1995) | 22°C (2007) | 375 mm | 27.9 |
| June | 28°C | 24°C | 30°C (2019) | 22°C (2006) | 303 mm | 30.0 |
| July | 28°C | 23°C | 30°C (2016) | 22°C (2009) | 195 mm | 27.9 |
| August | 29°C | 23°C | 34°C (2017) | 21°C (1997) | 118 mm | 21.7 |
| September | 30°C | 23°C | 35°C (2019) | 20°C (1993) | 60 mm | 15.0 |
| October | 32°C | 24°C | 36°C (1997) | 21°C (1996) | 62 mm | 12.4 |
| November | 31°C | 24°C | 35°C (2016) | 22°C (1992) | 111 mm | 21.0 |
| December | 29°C | 24°C | 34°C (2016) | 20°C (1994) | 211 mm | 27.9 |
| Year | 29°C | 24°C | 2302 mm | 277 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
2302 mm in a normal year, most in May.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Saint-Laurent-du-Maroni.
The muggiest month is April, when 101 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | 22°C | 86% | 0% | 0% | 0% | 15% | 79% | 6% |
| February | 22°C | 84% | 0% | 0% | 0% | 19% | 78% | 3% |
| March | 22°C | 83% | 0% | 0% | 0% | 16% | 82% | 2% |
| April | 23°C | 86% | 0% | 0% | 0% | 3% | 79% | 19% |
| May | 24°C | 90% | 0% | 0% | 0% | 0% | 45% | 55% |
| June | 24°C | 91% | 0% | 0% | 0% | 0% | 51% | 49% |
| July | 24°C | 90% | 0% | 0% | 0% | 0% | 73% | 27% |
| August | 24°C | 88% | 0% | 0% | 0% | 0% | 75% | 25% |
| September | 23°C | 83% | 0% | 0% | 0% | 2% | 84% | 13% |
| October | 23°C | 77% | 0% | 0% | 0% | 4% | 91% | 5% |
| November | 23°C | 80% | 0% | 0% | 0% | 4% | 86% | 10% |
| December | 23°C | 85% | 0% | 0% | 0% | 3% | 86% | 11% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is September, with the sky 39 percent covered on average; the cloudiest is May, at 75 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is February, averaging 7.6 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 9, with 12 h 27 min of daylight; the shortest is Jan 2, with 11 h 48 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Saint-Laurent-du-Maroni in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.