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Contents
- The climate of Grand-Santi
- The best time to visit Grand-Santi
- The worst time to visit Grand-Santi
- Spring weather in Grand-Santi
- Summer weather in Grand-Santi
- Autumn weather in Grand-Santi
- Winter weather in Grand-Santi
- 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
The climate of Grand-Santi
Grand-Santi, being positioned in French Guiana, is subject to an Af (predominate climate) in the Köppen climate classification system, which equates to a Tropical rainforest climate. This classification is favored in regions that maintain a tropical atmosphere, implying consistently high temperatures and significant levels of precipitation, most common near the equator.
The key characteristic of Grand-Santi's climate is the continuous hot temperature which barely fluctuates throughout the year, with highs typically ranging from 29.5°C (85.1°F) to 34.8°C (94.6°F), and lows between 20.7°C (69.3°F) and 22°C (71.6°F). No substantial variation between monthly average high and low temperatures exists, depicting a steady tropical environment.
On the metrics of relative humidity, this locality displays high levels of humidity throughout the year, varying from 75% to 90%, contributing to the inherent mugginess and heatiness of the locale. This combined with the persistent cloud cover of 45% to 78% further augments the sticky, tropical climate of the region.
The monthly rainfall ranges from 18mm (0.71") in September to a high of 171mm (6.73") in May, creating an evident rainy season from April to June. Interestingly, the quantity of rainfall doesn't always coincide with the number of rainy days, which ranges from 10.3 days in September to 28.1 days in December and January. An unusual pattern is the elevation in the number of rainy days in December, notwithstanding relatively moderate rainfall.
The key characteristic of Grand-Santi's climate is the continuous hot temperature which barely fluctuates throughout the year, with highs typically ranging from 29.5°C (85.1°F) to 34.8°C (94.6°F), and lows between 20.7°C (69.3°F) and 22°C (71.6°F). No substantial variation between monthly average high and low temperatures exists, depicting a steady tropical environment.
On the metrics of relative humidity, this locality displays high levels of humidity throughout the year, varying from 75% to 90%, contributing to the inherent mugginess and heatiness of the locale. This combined with the persistent cloud cover of 45% to 78% further augments the sticky, tropical climate of the region.
The monthly rainfall ranges from 18mm (0.71") in September to a high of 171mm (6.73") in May, creating an evident rainy season from April to June. Interestingly, the quantity of rainfall doesn't always coincide with the number of rainy days, which ranges from 10.3 days in September to 28.1 days in December and January. An unusual pattern is the elevation in the number of rainy days in December, notwithstanding relatively moderate rainfall.
The best time to visit Grand-Santi
Forecasting the most favorable time to traverse to Grand-Santi is predominantly contingent on an individual's weather preferences. For the individuals who prefer abundant sunshine and less rainfall, September to November offers the most suitable conditions. During these months, sunshine hours are the maximum, averaging 9.1 hours in September and slowly dropping to 8.3 hours in November. The rainfall is minimal, with September receiving a mere 18mm (0.71") of rainfall over 10.3 days.
The worst time to visit Grand-Santi
The worst time to visit Grand-Santi would be the months of April to June when the region experiences the heaviest rainfall hovering about 171mm (6.73") in May over an average of 26.3 days. This period is characterized by frequent and heavy rainfall which may hinder travel plans and outdoor activities.
Spring weather in Grand-Santi
Spring in Grand-Santi, which corresponds to March, April and May, continues the trend of uniformly high temperatures with the highs slightly increasing from 30.4°C (86.7°F) in March to 30.1°C (86.2°F) in May. However, rainfall begins to rise dramatically, with the highest level of precipitation observed in May at 171mm (6.73") over 26.3 days. Despite the rainfall, abundant sunshine with an average of 5.5 hours a day is seen in the month of May.
Summer weather in Grand-Santi
The summer months, June to August, persist with consistently high temperatures that range from 30.4°C (86.7°F) in June to a peak of 34.3°C (93.7°F) in August. Relative humidity takes a slightly downward turn ranging from 89% in June to 80% in August. This period witnesses a transition from the wetter spring to a drier summer, with rainfall significantly reducing to 43mm (1.69") in August across nearly 15.8 days, marking the beginning of the drier season.
Autumn weather in Grand-Santi
Come autumn, spanning September to November, Grand-Santi welcomes a drier climate with falling precipitation levels. September sees the lowest rainfall of the year at 18mm (0.71") across just 10.3 days. Temperatures continue to be exceptionally high, with an average monthly high above 34°C (93.2°F) in both September and October.
Winter weather in Grand-Santi
Winter, observed in December, January, and February, continues with the reliably high temperatures. Interestingly, despite December witnessing the second-highest rainfall in the year at 106mm (4.17"), the number of rainy days is the highest in this month with 28.1 days. However, the degree of sunshine hours tends to reduce, lowering to 5.3 hours in December and only slightly rising to 5.9 hours by February.
Weather in January
As Grand-Santi, French Guiana transitions from the end of the old year into January, there is a noticeable continuation of humidity levels. This month registers a high tendency for cloud coverage with pressure consistently remaining near 1011.9mb. Weather in January »
Weather in February
Stepping into February, Grand-Santi experiences a decrease in daylight hours with occasional rainfall prevalent throughout the city. This month underscores the dominance of cloudiness, with the air pressure slightly dropping to 1011.6mb. Weather in February »
Weather in March
The weather in March witnesses a marginal transition from the city’s regular climatic patterns with a direct reflection of these changes in rising temperatures. Moderate rainfall dictates the ambiance of the city, while a UV index of 6 dictates precautionary measures during outside activities. Weather in March »
Weather in April
April's weather in Grand-Santi carries an upward trend in terms of temperature, accompanied by a subtle increase in humidity levels. This month's climatic patterns warn against potential UV exposure, considering the constantly stable UV index of 6. Weather in April »
Weather in May
May introduces Grand-Santi, French Guiana with warmer temperatures, signaling the pre-summer phase. Observing diversified climatic patterns, this month retains a moderate pressure rate of 1012.1mb. However, there is a considerable increase in humidity, which might lead to discomfort. Weather in May »
Weather in June
The onset of June ushers in an onset of brighter weather conditions, with increasing daylight hours, indicative of summer’s arrival. Pressure levels rise marginally to 1012.9mb. Residents and visitors can expect potentially high UV exposure, with the UV index sitting at 6. Weather in June »
Weather in July
The month of July ushers in a warm trend, with clearer climatic conditions noted in Grand-Santi, French Guiana. Adapting to drier weather conditions, this month records considerable reductions in rainfall, aiding in merriment. Slight variations in pressure, at 1012.9mb, prompt no significant changes in the overall climatic conditions. Weather in July »
Weather in August
August provides the residents of Grand-Santi with an abundance of sunlight and diminishing occurrences of rainfall. With the pressure levels slightly dipping to 1012.3mb, the climate remains fairly consistent. The UV Index remains stationary at 7, suggesting constant precautionary measures against UV rays. Weather in August »
Weather in September
The weather conditions in Grand-Santi during September record significant changes with the reduction in humidity levels and the steady decrease of rainfall. The lowering pressure values, at 1011.5mb, suggest a smooth climatic transition into the fall season. Weather in September »
Weather in October
October introduces a slight change in the climate of Grand-Santi, highlighted by a decrease in temperature and an evident decrease in daylight hours. The month presents a slight rise in the pressure level, at 1010.1mb, indicating a stable atmospheric condition. Weather in October »
Weather in November
Grand-Santi in November witnesses a mild decline in temperatures, signifying the onset of winters. The typical climatic patterns indicate a decrease in pressure values to 1009.4mb. Despite the decrease in sunshine hours, the UV Index remains steady at 7, calling for continuous application of UV protective measures. Weather in November »
Weather in December
December in Grand-Santi features a significant decrease in temperature, signaling the full onset of winter. The pressure level, at 1010.7mb, inclines slightly compared to November. The predominant weather conditions signify a higher possibility of rainfall and shorter daylight hours. Weather in December »
[Resources]Frequently asked questions
How much does it rain in Grand-Santi?
In Grand-Santi, French Guiana, during the entire year, the rain falls for 259.6 days and collects up to 915mm (36.02") of precipitation.
What part of the year is the coldest in Grand-Santi?
In Grand-Santi, French Guiana, the lowest temperatures are generally noted in February, averaging a high of 29.5°C (85.1°F) and a low of 21.1°C (70°F).
What is the month with the least sunshine in Grand-Santi?
The month with the least sunshine is February, with an average of 4.5h of sunshine.
What is the most humid month in Grand-Santi?
The most humid month is May, with an average relative humidity of 90%.
What is the wettest month in Grand-Santi?
The month with the most rainfall in Grand-Santi, French Guiana, is May, when the rain falls for 26.3 days and typically aggregates up to 171mm (6.73") of precipitation.
When are the longest days in Grand-Santi?
June has the longest days of the year in Grand-Santi, French Guiana, with an average of 12h and 24min of daylight.
When is the highest UV index in Grand-Santi?
The months with the highest UV index are July through November, with an average maximum UV index of 7.
What is the driest month in Grand-Santi?
The month with the least rainfall in Grand-Santi is September, when the rain falls for 10.3 days and typically collects 18mm (0.71") of precipitation.
What month has the most sunshine in Grand-Santi?
The month with the most sunshine is September, with an average of 9.1h of sunshine.
What is the warmest month in Grand-Santi?
Temperature records in Grand-Santi, French Guiana, mark October as the warmest month, with highs averaging 34.8°C (94.6°F) and lows at 21.4°C (70.5°F).
What is the least humid month in Grand-Santi?
October is the least humid month, with an average relative humidity of 73%.
What is the month with the shortest days in Grand-Santi?
With an average of 11h and 54min of daylight, December has the shortest days of the year.
Is there Daylight Saving Time (DST) in Grand-Santi?
Grand-Santi, French Guiana, does not utilize Daylight Saving Time (DST). -03 timezone is used throughout the entire year.
What is the month with the lowest UV index in Grand-Santi?
With an average maximum UV index of 5, December is the month with the lowest UV index in Grand-Santi, French Guiana.
Average temperature
Grand-Santi, French Guiana
The warmest month (with the highest average high temperature) is October (34.8°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°C).
The coldest month (with the lowest average low temperature) is January (20.7°C).
Average pressure
Grand-Santi, 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:
1011.5mbar - Average pressure in October:
1010.1mbar - Average pressure in November:
1009.4mbar - 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 (1009.4mbar).
Average wind speed
Grand-Santi, 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:
5.2km/h - Average wind speed in October:
5.4km/h - Average wind speed in November:
5.4km/h - Average wind speed in December:
5.3km/h
The windiest month (with the highest average wind speed) is March (5.5km/h).
The calmest month (with the lowest average wind speed) is July (4.4km/h).
Average humidity
Grand-Santi, French Guiana
The month with the highest relative humidity is May (90%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Grand-Santi, French Guiana
- Average rainfall in January:
86mm - Average rainfall in February:
79mm - Average rainfall in March:
70mm - Average rainfall in April:
114mm - Average rainfall in May:
171mm - Average rainfall in June:
94mm
The wettest month (with the highest rainfall) is May (171mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days
Grand-Santi, 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:
19.8 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
10.3 days - Average rainfall days in October:
11.3 days - Average rainfall days in November:
17.7 days - Average rainfall days in December:
28.1 days
The month with the highest number of rainy days is December (28.1 days).
The month with the least rainy days is September (10.3 days).
Average daylight / Average sunshine
Grand-Santi, French Guiana
- Average daylight in January:
11h and 5min - 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 2min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 5min - Average daylight in December:
11h and 5min
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 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
5h and 0min - Average sunshine in April:
5h and 1min - Average sunshine in May:
5h and 3min - Average sunshine in June:
7h and 1min
- Average sunshine in July:
7h and 5min - Average sunshine in August:
8h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
8h and 5min - Average sunshine in November:
8h and 2min - Average sunshine in December:
5h and 5min
The month with the most sunshine is September (Average sunshine: 9h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Grand-Santi, 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:
3.5 days - Average sunshine days in June:
5.8 days
- Average sunshine days in July:
9.6 days - Average sunshine days in August:
13.6 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
11.1 days - Average sunshine days in December:
2 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is February (1.4 days).
Average UV index
Grand-Santi, 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
Grand-Santi, 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 45).
Average visibility
Grand-Santi, French Guiana
The months with the highest visibility are August, September, October and November (7km).
The month with the lowest visibility is May (5km).
Grand-Santi, French Guiana
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