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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
Weather in January
January, the same as December, is another warm winter month in Grand Usine, French Guiana, with an average temperature ranging between max 29.7°C (85.5°F) and min 20.8°C (69.4°F). The transition from December to January sees average high-temperatures adjusting to a warm 29.7°C (85.5°F), from a not significantly different 30.8°C (87.4°F). Weather in January »
Weather in February
The last month of the winter, February, is also a moderately hot month in Grand Usine, French Guiana, with an average temperature varying between 21.2°C (70.2°F) and 29.3°C (84.7°F). Grand Usine's coldest month, February, generally records average temperatures ranging from a high of 29.3°C (84.7°F) to a low of 21.2°C (70.2°F). The heat index value for February is computed to be a torrid 38°C (100.4°F). Weather in February »
Weather in March
The first month of the spring, March, is a hot month in Grand Usine, French Guiana, with an average temperature fluctuating between 21°C (69.8°F) and 30.1°C (86.2°F). The arrival of March brings an average high-temperature of a tropical 30.1°C (86.2°F), nearly identical to February's 29.3°C (84.7°F). Weather in March »
Weather in April
April, like March, in Grand Usine, French Guiana, is another warm spring month, with an average temperature fluctuating between 21.5°C (70.7°F) and 29.8°C (85.6°F). April's onset records a minor alteration in the average high-temperature to a warm 29.8°C (85.6°F) from March's 30.1°C (86.2°F). Weather in April »
Weather in May
The last month of the spring, May, is another warm month in Grand Usine, French Guiana, with temperature in the range of an average high of 29.8°C (85.6°F) and an average low of 21.9°C (71.4°F). The shift into May finds Grand Usine at an average high-temperature of a still warm 29.8°C (85.6°F), corresponding to April's conditions. Weather in May »
Weather in June
June, the first month of the summer in Grand Usine, is a hot month, with an average temperature varying between 21.1°C (70°F) and 30.3°C (86.5°F). Grand Usine records an average high-temperature of a tropical 30.3°C (86.5°F) in June, closely mirroring the climate of the previous month. Weather in June »
Weather in July
July, like June, is another hot summer month in Grand Usine, French Guiana, with an average temperature fluctuating between 31.1°C (88°F) and 20.8°C (69.4°F). The arrival of July marks a slight shift to an average high-temperature of a still hot 31.1°C (88°F) from June's 30.3°C (86.5°F). Weather in July »
Weather in August
The last month of the summer, August, is another tropical month in Grand Usine, French Guiana, with an average temperature varying between 20.5°C (68.9°F) and 32.8°C (91°F). August registers an average high-temperature of a still tropical 32.8°C (91°F), slightly varied from July's 31.1°C (88°F). Weather in August »
Weather in September
The first month of the autumn, September, is still a hot month in Grand Usine, French Guiana, with an average temperature fluctuating between 34.1°C (93.4°F) and 20.5°C (68.9°F). The advent of September sees the average high-temperature at a still hot 34.1°C (93.4°F), subtly shifted from August's 32.8°C (91°F). Weather in September »
Weather in October
October, the same as September, in Grand Usine, French Guiana, is another hot autumn month, with an average temperature fluctuating between 34.9°C (94.8°F) and 20.8°C (69.4°F). The month of October sees the highest average temperatures, reaching 34.9°C (94.8°F) at the peak and 20.8°C (69.4°F) at the low. For most parts of October, the heat index is computed to be a burning hot 51°C (123.8°F). Weather in October »
Weather in November
November, the last month of the autumn in Grand Usine, is another tropical month, with temperature in the range of an average low of 21°C (69.8°F) and an average high of 34°C (93.2°F). The beginning of November records an average high-temperature of a still tropical 34°C (93.2°F), almost echoing the conditions of the previous month. Weather in November »
Weather in December
The first month of the winter, December, is also a hot month in Grand Usine, French Guiana, with an average temperature ranging between max 30.8°C (87.4°F) and min 20.9°C (69.6°F). The transition to December results in a modest reduction in average high-temperature, moving from 34°C (93.2°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
How much does it rain in Grand Usine?
In Grand Usine, French Guiana, during the entire year, the rain falls for 265.5 days and collects up to 1078mm (42.44") of precipitation.
What is the month with the lowest UV index in Grand Usine?
January, March and December, with an average maximum UV index of 5, are months with the lowest UV index.
What month is the coldest in Grand Usine?
Temperature readings in Grand Usine, French Guiana, reach their annual highs in February, averaging 29.3°C (84.7°F) and a minimum average of 21.2°C (70.2°F).
What is the month with the least sunshine in Grand Usine?
The month with the least sunshine is February, with an average of 4h of sunshine.
What is the most humid month in Grand Usine?
The most humid month is May, with an average relative humidity of 90%.
What is the rainiest month in Grand Usine?
The month with the most rainfall in Grand Usine is May, when the rain falls for 25.9 days and typically aggregates up to 192mm (7.56") of precipitation.
When are the longest days in Grand Usine?
June has the longest days of the year in Grand Usine, French Guiana, with an average of 12h and 18min of daylight.
What are the months with the highest UV index in Grand Usine?
August through November, with an average maximum UV index of 7, are months with the highest UV index.
What are the months with the most sunshine in Grand Usine?
September and October, with an average of 8.8h of sunshine, are months with the most sunshine in Grand Usine, French Guiana.
What month is the hottest in Grand Usine?
October is the warmest month, exhibiting average temperatures of 34.9°C (94.8°F) at the peak and 20.8°C (69.4°F) at the base.
What is the least humid month in Grand Usine?
With an average relative humidity of 72%, October is the least humid month in Grand Usine.
What is the driest month in Grand Usine?
The month with the least rainfall in Grand Usine, French Guiana, is October, when the rain falls for 10.4 days and typically collects 21mm (0.83") of precipitation.
What is the month with the shortest days in Grand Usine?
December has the shortest days of the year in Grand Usine, with an average of 11h and 54min of daylight.
Is there Daylight Saving Time (DST) in Grand Usine?
Grand Usine, French Guiana, does not observe Daylight Saving Time (DST). -03 timezone is used over the entire year.
Average temperature
Grand Usine, 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 (29.3°C).
The month with the highest average low temperature is May (21.9°C).
The coldest months (with the lowest average low temperature) are August and September (20.5°C).
Average pressure
Grand Usine, French Guiana
- Average pressure in January:
1011.8mbar - Average pressure in February:
1011.6mbar - Average pressure in March:
1011.7mbar - Average pressure in April:
1011.8mbar - Average pressure in May:
1012.2mbar - Average pressure in June:
1013mbar
- Average pressure in July:
1013mbar - Average pressure in August:
1012.4mbar - Average pressure in September:
1011.6mbar - Average pressure in October:
1010.2mbar - Average pressure in November:
1009.4mbar - Average pressure in December:
1010.7mbar
The months with the highest atmospheric pressure are June and July (1013mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed
Grand Usine, French Guiana
- Average wind speed in January:
5.1km/h - Average wind speed in February:
5.3km/h - Average wind speed in March:
5.3km/h - Average wind speed in April:
4.8km/h - Average wind speed in May:
4.5km/h - Average wind speed in June:
4.3km/h
- Average wind speed in July:
4.2km/h - Average wind speed in August:
4.5km/h - Average wind speed in September:
4.9km/h - Average wind speed in October:
5.2km/h - Average wind speed in November:
5.3km/h - Average wind speed in December:
5.1km/h
The windiest months (with the highest average wind speed) are February, March and November (5.3km/h).
The calmest month (with the lowest average wind speed) is July (4.2km/h).
Average humidity
Grand Usine, French Guiana
The month with the highest relative humidity is May (90%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Grand Usine, French Guiana
- Average rainfall in January:
86mm - Average rainfall in February:
81mm - Average rainfall in March:
82mm - Average rainfall in April:
129mm - Average rainfall in May:
192mm - Average rainfall in June:
123mm
The wettest month (with the highest rainfall) is May (192mm).
The driest month (with the least rainfall) is October (21mm).
Average rainfall days
Grand Usine, French Guiana
- Average rainfall days in January:
26.8 days - Average rainfall days in February:
25.8 days - Average rainfall days in March:
26.8 days - Average rainfall days in April:
26.3 days - Average rainfall days in May:
25.9 days - Average rainfall days in June:
24.5 days
- Average rainfall days in July:
24.6 days - Average rainfall days in August:
18.8 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
15.1 days - Average rainfall days in December:
26.2 days
The months with the highest number of rainy days are January and March (26.8 days).
The month with the least rainy days is October (10.4 days).
Average daylight / Average sunshine
Grand Usine, French Guiana
- Average daylight in January:
12h and 0min - Average daylight in February:
12h and 0min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 1min - Average daylight in May:
12h and 2min - Average daylight in June:
12h and 2min
- Average daylight in July:
12h and 2min - Average daylight in August:
12h and 1min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 0min - Average daylight in November:
12h and 0min - Average daylight in December:
11h and 5min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
4h and 4min - Average sunshine in April:
4h and 4min - Average sunshine in May:
5h and 1min - Average sunshine in June:
6h and 4min
- Average sunshine in July:
7h and 3min - Average sunshine in August:
8h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
8h and 5min - Average sunshine in November:
8h and 1min - Average sunshine in December:
5h and 4min
The months with the most sunshine are September and October (Average sunshine: 8h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days
Grand Usine, French Guiana
- Average sunshine days in January:
2.3 days - Average sunshine days in February:
1.8 days - Average sunshine days in March:
2.7 days - Average sunshine days in April:
2.5 days - Average sunshine days in May:
3.4 days - Average sunshine days in June:
3.3 days
- Average sunshine days in July:
4.3 days - Average sunshine days in August:
9.5 days - Average sunshine days in September:
13.3 days - Average sunshine days in October:
17.3 days - Average sunshine days in November:
12.5 days - Average sunshine days in December:
3.7 days
The month with the most sunshine days is October (17.3 days).
The month with the least sunshine days is February (1.8 days).
Average UV index
Grand Usine, French Guiana
The months with the highest UV index are August, September, October and November (UV index 7).
The months with the lowest UV index are January, March and December (UV index 5).
Average cloud cover
Grand Usine, French Guiana
The month with the most cloud cover is February (Cloud cover 81).
The month with the least cloud cover is October (Cloud cover 44).
Average visibility
Grand Usine, French Guiana
The month with the highest visibility is October (8km).
The month with the lowest visibility is May (5km).
