Climate and monthly weather forecastSiminiout, French Guiana
Climate and monthly weather forecast
Weather in January
January, the same as December, is a moderately hot winter month in Siminiout, French Guiana, with temperature in the range of an average low of 22°C (71.6°F) and an average high of 28.4°C (83.1°F). The shift into January reveals an average high-temperature of a still warm 28.4°C (83.1°F), closely mirroring December's climate. Weather in January »Weather in February
February, the last month of the winter in Siminiout, is also a moderately hot month, with an average temperature ranging between max 27.9°C (82.2°F) and min 22.3°C (72.1°F). In Siminiout, the lowest average temperatures are observed in February, with a high of 27.9°C (82.2°F) and a low of 22.3°C (72.1°F). The heat index value during February is appraised at a hot 33°C (91.4°F). Weather in February »Weather in March
The first month of the spring, March, is still a warm month in Siminiout, French Guiana, with an average temperature ranging between min 22.2°C (72°F) and max 28.8°C (83.8°F). The average high-temperature during March registers at a still moderately hot 28.8°C (83.8°F), maintaining a close resemblance to the previous month. Weather in March »Weather in April
April, the same as March, is another warm spring month in Siminiout, French Guiana, with an average temperature fluctuating between 28.8°C (83.8°F) and 22.4°C (72.3°F). Siminiout's climate in April displays an average high temperature of a still warm 28.8°C (83.8°F), consistent with the March's record. Weather in April »Weather in May
May, the last month of the spring in Siminiout, is also a moderately hot month, with temperature in the range of an average high of 28.8°C (83.8°F) and an average low of 22.3°C (72.1°F). May's entry sees an average high-temperature of a still warm 28.8°C (83.8°F), replicating April's climate. Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Siminiout, French Guiana, with temperature in the range of an average low of 21.8°C (71.2°F) and an average high of 29.3°C (84.7°F). The advent of June presents an average high-temperature of a still moderately hot 29.3°C (84.7°F), maintaining a close correlation with the preceding month. Weather in June »Weather in July
July is a tropical summer month in Siminiout, French Guiana, with an average temperature varying between 21.3°C (70.3°F) and 30.3°C (86.5°F). Siminiout, French Guiana, experiences a minor change to a hot 30.3°C (86.5°F) in average high-temperature during July, closely reflecting June. Weather in July »Weather in August
August, the last month of the summer in Siminiout, is another hot month, with an average temperature fluctuating between 32.3°C (90.1°F) and 21.7°C (71.1°F). The average high-temperature during August registers at a still tropical 32.3°C (90.1°F), maintaining a close resemblance to the previous month. Weather in August »Weather in September
The first month of the autumn, September, is still a tropical month in Siminiout, French Guiana, with an average temperature fluctuating between 33.7°C (92.7°F) and 21.8°C (71.2°F). In Siminiout, September's average high-temperature stands at a still hot 33.7°C (92.7°F), closely related to the preceding month. Weather in September »Weather in October
October, like September, is another tropical autumn month in Siminiout, French Guiana, with an average temperature fluctuating between 22.2°C (72°F) and 34.3°C (93.7°F). The warmest period is October, when temperatures fluctuate between an average high of 34.3°C (93.7°F) and a low of 22.2°C (72°F). October's mean heat index is appraised at a burning hot 51°C (123.8°F). Weather in October »Weather in November
The last month of the autumn, November, is another hot month in Siminiout, French Guiana, with temperature in the range of an average low of 22.2°C (72°F) and an average high of 33°C (91.4°F). The average high-temperature during November registers at a still tropical 33°C (91.4°F), closely corresponding to the preceding month. Weather in November »Weather in December
The first month of the winter, December, is also a moderately hot month in Siminiout, French Guiana, with an average temperature varying between 22°C (71.6°F) and 29.8°C (85.6°F). December brings a slight decrease in the average high-temperature, shifting from a hot 33°C (91.4°F) in November to a moderately hot 29.8°C (85.6°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 270.6 rainfall days, and 1131mm (44.53") of precipitation is accumulated.
The months with the lowest UV index in Siminiout, French Guiana, are January through July, November and December, with an average maximum UV index of 6.
Siminiout's temperature records reveal February as the coldest month, marked by average highs of 27.9°C (82.2°F) and lows of 22.3°C (72.1°F).
With an average of 4h of sunshine, February has the least sunshine of the year.
With an average relative humidity of 91%, May is the most humid month.
The month with the most rainfall in Siminiout is May, when the rain falls for 28.9 days and typically aggregates up to 195mm (7.68") of precipitation.
June has the longest days of the year, with an average of 12h and 18min of daylight.
The months with the highest UV index in Siminiout, French Guiana, are August through October, with an average maximum UV index of 7.
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 21mm (0.83") of precipitation.
September has the most sunshine of the year, with an average of 8.8h of sunshine.
Siminiout's temperatures peak on average in October, reaching 34.3°C (93.7°F) at their highest and 22.2°C (72°F) at their lowest.
October is the least humid month in Siminiout, French Guiana, with an average relative humidity of 75%.
With an average of 12h and 0min of daylight, December has the shortest days of the year in Siminiout, French Guiana.
Siminiout, French Guiana, does not observe Daylight Saving Time (DST). -03 timezone is used over the entire year.
Average temperature
Siminiout, French Guiana
The warmest month (with the highest average high temperature) is October (34.3°C).
The month with the lowest average high temperature is February (27.9°C).
The month with the highest average low temperature is April (22.4°C).
The coldest month (with the lowest average low temperature) is July (21.3°C).
Average pressure
Siminiout, French Guiana
- Average pressure in January:
1011.7mbar - Average pressure in February:
1011.5mbar - Average pressure in March:
1011.8mbar - Average pressure in April:
1011.8mbar - Average pressure in May:
1012.3mbar - Average pressure in June:
1013.1mbar
- Average pressure in July:
1013.2mbar - Average pressure in August:
1012.8mbar - Average pressure in September:
1012.1mbar - Average pressure in October:
1010.6mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1010.8mbar
The month with the highest atmospheric pressure is July (1013.2mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed
Siminiout, French Guiana
- Average wind speed in January:
5.6km/h - Average wind speed in February:
5.7km/h - Average wind speed in March:
5.8km/h - Average wind speed in April:
5.3km/h - Average wind speed in May:
4.7km/h - Average wind speed in June:
4.2km/h
- Average wind speed in July:
4.5km/h - Average wind speed in August:
5.3km/h - Average wind speed in September:
6km/h - Average wind speed in October:
6.1km/h - Average wind speed in November:
5.9km/h - Average wind speed in December:
5.6km/h
The windiest month (with the highest average wind speed) is October (6.1km/h).
The calmest month (with the lowest average wind speed) is June (4.2km/h).
Average humidity
Siminiout, French Guiana
The month with the highest relative humidity is May (91%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Siminiout, French Guiana
- Average rainfall in January:
92mm - Average rainfall in February:
90mm - Average rainfall in March:
86mm - Average rainfall in April:
142mm - Average rainfall in May:
195mm - Average rainfall in June:
133mm
The wettest month (with the highest rainfall) is May (195mm).
The driest month (with the least rainfall) is September (21mm).
Average rainfall days
Siminiout, French Guiana
- Average rainfall days in January:
25.4 days - Average rainfall days in February:
22.9 days - Average rainfall days in March:
25.9 days - Average rainfall days in April:
26.5 days - Average rainfall days in May:
28.9 days - Average rainfall days in June:
26.6 days
- Average rainfall days in July:
26.8 days - Average rainfall days in August:
21.1 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
12 days - Average rainfall days in November:
16.9 days - Average rainfall days in December:
25.1 days
The month with the highest number of rainy days is May (28.9 days).
The month with the least rainy days is October (12 days).
Average daylight / Average sunshine
Siminiout, French Guiana
- Average daylight in January:
12h and 0min - 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 18min
- Average daylight in July:
12h and 18min - Average daylight in August:
12h and 12min - Average daylight in September:
12h and 6min - Average daylight in October:
12h and 6min - Average daylight in November:
12h and 0min - Average daylight in December:
12h and 0min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 12h and 0min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
4h and 0min - Average sunshine in March:
4h and 36min - Average sunshine in April:
4h and 48min - Average sunshine in May:
5h and 30min - Average sunshine in June:
6h and 48min
- Average sunshine in July:
7h and 24min - Average sunshine in August:
8h and 24min - Average sunshine in September:
8h and 48min - Average sunshine in October:
8h and 42min - Average sunshine in November:
8h and 0min - Average sunshine in December:
5h and 54min
The month with the most sunshine is September (Average sunshine: 8h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days
Siminiout, French Guiana
- Average sunshine days in January:
4.8 days - Average sunshine days in February:
4.9 days - Average sunshine days in March:
4.2 days - Average sunshine days in April:
2.7 days - Average sunshine days in May:
1.8 days - Average sunshine days in June:
2 days
- Average sunshine days in July:
2.5 days - Average sunshine days in August:
6.4 days - Average sunshine days in September:
13.5 days - Average sunshine days in October:
16.3 days - Average sunshine days in November:
10.7 days - Average sunshine days in December:
4.5 days
The month with the most sunshine days is October (16.3 days).
The month with the least sunshine days is May (1.8 days).
Average UV index
Siminiout, French Guiana
The months with the highest UV index are August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, November and December (UV index 6).
Average cloud cover
Siminiout, 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
Siminiout, French Guiana
The months with the highest visibility are September and October (7km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, November and December (6km).
