Climate and monthly weather forecastL'Observatoire, French Guiana
Climate and monthly weather forecast
Weather in January
January, like December, in L'Observatoire, French Guiana, is a moderately hot winter month, with an average temperature ranging between max 29.8°C (85.6°F) and min 20.6°C (69.1°F). The arrival of January brings an average high-temperature of a warm 29.8°C (85.6°F), nearly identical to December's 30.8°C (87.4°F). Weather in January »Weather in February
The last month of the winter, February, is another warm month in L'Observatoire, French Guiana, with temperature in the range of an average high of 29.5°C (85.1°F) and an average low of 21°C (69.8°F). February is L'Observatoire's coldest month, registering average high temperatures of 29.5°C (85.1°F) and lows of 21°C (69.8°F). In February, the heat index is estimated at a very hot 38°C (100.4°F). Weather in February »Weather in March
March, the first month of the spring in L'Observatoire, is a hot month, with an average temperature ranging between min 21.3°C (70.3°F) and max 30.4°C (86.7°F). In March, the average high-temperature registers at a hot 30.4°C (86.7°F), nearly identical to February's 29.5°C (85.1°F). Weather in March »Weather in April
April, the same as March, in L'Observatoire, French Guiana, is another hot spring month, with an average temperature fluctuating between 21.6°C (70.9°F) and 30.2°C (86.4°F). April brings an average high-temperature of a still hot 30.2°C (86.4°F), nearly identical to the preceding month. Weather in April »Weather in May
The last month of the spring, May, is another tropical month in L'Observatoire, French Guiana, with an average temperature ranging between max 30.1°C (86.2°F) and min 22.1°C (71.8°F). L'Observatoire signifies an average high-temperature of a still hot 30.1°C (86.2°F) in May, closely mirroring the 30.2°C (86.4°F) of April. Weather in May »Weather in June
June, the first month of the summer in L'Observatoire, is still a tropical month, with an average temperature fluctuating between 30.4°C (86.7°F) and 21.8°C (71.2°F). With the onset of June, a modest change to a still hot 30.4°C (86.7°F) from May's 30.1°C (86.2°F) is noted in high-temperature. Weather in June »Weather in July
July, the same as June, in L'Observatoire, French Guiana, is another hot summer month, with an average temperature fluctuating between 31.3°C (88.3°F) and 21.1°C (70°F). In July, L'Observatoire experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 30.4°C (86.7°F) in June to a still hot 31.3°C (88.3°F). Weather in July »Weather in August
The last month of the summer, August, is another tropical month in L'Observatoire, French Guiana, with temperature in the range of an average high of 33°C (91.4°F) and an average low of 21.1°C (70°F). As August takes its course, L'Observatoire's average high-temperature registers at a still tropical 33°C (91.4°F), closely aligning with the preceding month. Weather in August »Weather in September
September, the first month of the autumn in L'Observatoire, is also a hot month, with temperature in the range of an average high of 34.4°C (93.9°F) and an average low of 21.3°C (70.3°F). The arrival of September sees a recorded average high-temperature of a still hot 34.4°C (93.9°F), showing little divergence from the previous month's conditions. Weather in September »Weather in October
October, the same as September, in L'Observatoire, French Guiana, is another tropical autumn month, with an average temperature ranging between max 34.9°C (94.8°F) and min 21.3°C (70.3°F). October, with average temperatures reaching a high of 34.9°C (94.8°F) and a low of 21.3°C (70.3°F), is the warmest month. October's heat index is estimated at a burning hot 52°C (125.6°F). Weather in October »Weather in November
The last month of the autumn, November, is also a hot month in L'Observatoire, French Guiana, with an average temperature fluctuating between 21.5°C (70.7°F) and 33.9°C (93°F). The onset of November marks an average high-temperature of a still hot 33.9°C (93°F), hardly differing from October's 34.9°C (94.8°F). Weather in November »Weather in December
The first month of the winter, December, is still a hot month in L'Observatoire, French Guiana, with temperature in the range of an average low of 21.1°C (70°F) and an average high of 30.8°C (87.4°F). The arrival of December is marked by a minor reduction in average high-temperature, sliding from a hot 33.9°C (93°F) in November to a still tropical 30.8°C (87.4°F). Weather in December »Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Throughout the year, there are 259.3 rainfall days, and 898mm (35.35") of precipitation is accumulated.
L'Observatoire, French Guiana, reaches its average lowest temperatures in February, measuring 29.5°C (85.1°F) at the peak and 21°C (69.8°F) at the lowest.
With an average of 4.5h of sunshine, February has the least sunshine of the year in L'Observatoire, French Guiana.
May is the most humid month in L'Observatoire, French Guiana, with an average relative humidity of 90%.
May is the month with the most rainfall in L'Observatoire. Rain falls for 26.3 days and accumulates 169mm (6.65") of precipitation.
June has the longest days of the year in L'Observatoire, with an average of 12h and 24min of daylight.
July through November, with an average maximum UV index of 7, are months with the highest UV index.
September has the most sunshine of the year, with an average of 9.2h of sunshine.
With average temperatures fluctuating between a high of 34.9°C (94.8°F) and a low of 21.3°C (70.3°F), October stands out as the warmest month in L'Observatoire, French Guiana.
With an average relative humidity of 73%, October is the least humid month in L'Observatoire, French Guiana.
The month with the least rainfall in L'Observatoire, French Guiana, is October, when the rain falls for 11.5 days and typically collects 21mm (0.83") of precipitation.
December has the shortest days of the year, with an average of 11h and 54min of daylight.
L'Observatoire, French Guiana, does not observe Daylight Saving Time (DST). -03 timezone is used throughout the entire year.
December is the month with the lowest UV index, with an average maximum UV index of 5.
Average temperature
L'Observatoire, French Guiana
The warmest month (with the highest average high temperature) is October (34.9°C).
The month with the lowest average high temperature is February (29.5°C).
The month with the highest average low temperature is May (22.1°C).
The coldest month (with the lowest average low temperature) is January (20.6°C).
Average pressure
L'Observatoire, French Guiana
- Average pressure in January:
1011.9mbar - Average pressure in February:
1011.6mbar - Average pressure in March:
1011.8mbar - Average pressure in April:
1011.8mbar - Average pressure in May:
1012.1mbar - Average pressure in June:
1012.9mbar
- Average pressure in July:
1012.9mbar - Average pressure in August:
1012.3mbar - Average pressure in September:
1011.4mbar - Average pressure in October:
1010.1mbar - Average pressure in November:
1009.3mbar - Average pressure in December:
1010.7mbar
The months with the highest atmospheric pressure are June and July (1012.9mbar).
The month with the lowest atmospheric pressure is November (1009.3mbar).
Average wind speed
L'Observatoire, French Guiana
- Average wind speed in January:
5.3km/h - Average wind speed in February:
5.4km/h - Average wind speed in March:
5.5km/h - Average wind speed in April:
5.1km/h - Average wind speed in May:
4.8km/h - Average wind speed in June:
4.5km/h
- Average wind speed in July:
4.4km/h - Average wind speed in August:
4.7km/h - Average wind speed in September:
5.1km/h - Average wind speed in October:
5.3km/h - Average wind speed in November:
5.5km/h - Average wind speed in December:
5.3km/h
The windiest months (with the highest average wind speed) are March and November (5.5km/h).
The calmest month (with the lowest average wind speed) is July (4.4km/h).
Average humidity
L'Observatoire, French Guiana
The month with the highest relative humidity is May (90%).
The month with the lowest relative humidity is October (73%).
Average rainfall
L'Observatoire, French Guiana
- Average rainfall in January:
86mm - Average rainfall in February:
79mm - Average rainfall in March:
70mm - Average rainfall in April:
115mm - Average rainfall in May:
169mm - Average rainfall in June:
95mm
The wettest month (with the highest rainfall) is May (169mm).
The driest month (with the least rainfall) is October (21mm).
Average rainfall days
L'Observatoire, French Guiana
- Average rainfall days in January:
28 days - Average rainfall days in February:
26.2 days - Average rainfall days in March:
26.5 days - Average rainfall days in April:
26.8 days - Average rainfall days in May:
26.3 days - Average rainfall days in June:
22.8 days
- Average rainfall days in July:
20 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
10.3 days - Average rainfall days in October:
11.5 days - Average rainfall days in November:
17.1 days - Average rainfall days in December:
28 days
The months with the highest number of rainy days are January and December (28 days).
The month with the least rainy days is September (10.3 days).
Average daylight / Average sunshine
L'Observatoire, French Guiana
- Average daylight in January:
11h and 54min - Average daylight in February:
12h and 0min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 12min - Average daylight in May:
12h and 18min - Average daylight in June:
12h and 24min
- Average daylight in July:
12h and 24min - Average daylight in August:
12h and 18min - Average daylight in September:
12h and 6min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 54min - Average daylight in December:
11h and 54min
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 54min).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
4h and 30min - Average sunshine in March:
5h and 0min - Average sunshine in April:
5h and 6min - Average sunshine in May:
5h and 30min - Average sunshine in June:
7h and 6min
- Average sunshine in July:
7h and 54min - Average sunshine in August:
8h and 48min - Average sunshine in September:
9h and 12min - Average sunshine in October:
8h and 54min - Average sunshine in November:
8h and 30min - Average sunshine in December:
6h and 12min
The month with the most sunshine is September (Average sunshine: 9h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
L'Observatoire, French Guiana
- Average sunshine days in January:
1.9 days - Average sunshine days in February:
1.4 days - Average sunshine days in March:
3 days - Average sunshine days in April:
2 days - Average sunshine days in May:
3.6 days - Average sunshine days in June:
5.8 days
- Average sunshine days in July:
9.5 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
11.5 days - Average sunshine days in December:
1.9 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is February (1.4 days).
Average UV index
L'Observatoire, French Guiana
The months with the highest UV index are July, August, September, October and November (UV index 7).
The month with the lowest UV index is December (UV index 5).
Average cloud cover
L'Observatoire, French Guiana
The month with the most cloud cover is February (Cloud cover 78).
The month with the least cloud cover is October (Cloud cover 46).
Average visibility
L'Observatoire, French Guiana
The months with the highest visibility are August, September, October and November (7km).
The months with the lowest visibility are January, February, March, April, May, June, July and December (6km).
