September weather forecast
Javouhey, French Guiana

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Weather in September

September in Javouhey stands out for its 9.1 hours of sunshine daily. September transitions from the slightly wetter August to a drier time, with rainfall dropping to 26mm (1.02"). With less rainfall, there is an increased opportunity to indulge in a number of outdoor activities. The weather is perfectly suited for sightseeing and exploring the local culture unruffled by rain.

Temperature

The onset of September in Javouhey, French Guiana, manifests an average high-temperature of a still hot 32.7°C (90.9°F), demonstrating a minor variation from the preceding month. In September, the recorded average low-temperature is a pleasant 22.5°C (72.5°F).

Heat index

September's average heat index is appraised at a life-threatening hot 47°C (116.6°F). Attention: Heat exhaustion and heat cramps are quite likely. Heatstroke becomes a risk with continued exertion.
Research indicates the heat index considers values in shaded locales and with light winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Javouhey, the average relative humidity in September is 79%.

Rainfall

In Javouhey, during September, the rain falls for 11.5 days and regularly aggregates up to 26mm (1.02") of precipitation. In Javouhey, during the entire year, the rain falls for 253 days and collects up to 878mm (34.57") of precipitation.

Daylight

The average length of the day in September in Javouhey is 12h and 9min.
On the first day of September in Javouhey, sunrise is at 06:28 and sunset at 18:41. On the last day of the month, sunrise is at 06:22 and sunset at 18:27 -03.

Sunshine

With an average of 9.1h of sunshine, September has the most sunshine of the year.

UV index

The months with the highest UV index in Javouhey are July through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Resources | Updated: Jan 31, 2024 | Published by: Weather Atlas

Frequently asked questions

How hot is it in Javouhey in September?

An average high-temperature, in September, in Javouhey, is 32.7°C (90.9°F) and the average low-temperature is 22.5°C (72.5°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 47°C (116.6°F).

What is the average humidity in September in Javouhey?

The average relative humidity in September in Javouhey, French Guiana, is 79%.

How much does it rain in Javouhey in September?

In Javouhey, in September, it is raining for 11.5 days, with typically 26mm (1.02") of accumulated precipitation.

What is the average length of the day in September in Javouhey?

The average day length in September in Javouhey is 12h and 9min.

When are sunrise and sunset in September in Javouhey?

On the first day of September, sunrise is at 06:28 and sunset at 18:41. On the last day of the month, sunrise is at 06:22 and sunset at 18:27 -03.

What month has the most sunshine in Javouhey?

With an average of 9.1h of sunshine, September has the most sunshine of the year in Javouhey.

How many hours of sunshine does Javouhey have in September?

In Javouhey, the average sunshine duration in September is 9.1h.

When is the highest UV index in Javouhey?

July through November, with an average maximum UV index of 7, are months with the highest UV index in Javouhey, French Guiana.

What is the UV index intensity in September in Javouhey?

The average daily maximum UV index in September in Javouhey, French Guiana, is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Javouhey, French Guiana

Average temperature in September - Javouhey, French Guiana
  • Average high temperature in September: 32.7°C

The warmest month (with the highest average high temperature) is October (33.1°C).
The month with the lowest average high temperature is February (29.1°C).

  • Average low temperature in September: 22.5°C

The month with the highest average low temperature is May (23.3°C).
The coldest month (with the lowest average low temperature) is July (22.2°C).

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Average pressure in September
Javouhey, French Guiana

Average pressure in September - Javouhey, French Guiana
  • Average pressure in September: 1011.6mbar

The months with the highest atmospheric pressure are June and July (1012.9mbar).
The month with the lowest atmospheric pressure is November (1009.5mbar).

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Average wind speed in September
Javouhey, French Guiana

Average wind speed in September - Javouhey, French Guiana
  • Average wind speed in September: 7.7km/h

The windiest months (with the highest average wind speed) are February and March (9.5km/h).
The calmest month (with the lowest average wind speed) is July (6.4km/h).

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Average humidity in September
Javouhey, French Guiana

Average humidity in September - Javouhey, French Guiana
  • Average humidity in September: 79%

The month with the highest relative humidity is June (88%).
The month with the lowest relative humidity is October (77%).

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Average rainfall in September
Javouhey, French Guiana

Average rainfall in September - Javouhey, French Guiana
  • Average rainfall in September: 26mm

The wettest month (with the highest rainfall) is May (137mm).
The driest month (with the least rainfall) is October (23mm).

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Average rainfall days in September
Javouhey, French Guiana

Average rainfall days in September - Javouhey, French Guiana
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is May (28 days).
The month with the least rainy days is September (11.5 days).

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Average daylight in September /
Average sunshine in September
Javouhey, French Guiana

Average daylight in September / Average sunshine in September - Javouhey, French Guiana
  • Average daylight in September: 12h and 1min

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 48min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is September (Average sunshine: 9h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in September
Javouhey, French Guiana

Average sunshine days in September - Javouhey, French Guiana
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is October (16 days).
The month with the least sunshine days is May (1.8 days).

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Average UV index in September
Javouhey, French Guiana

Average UV index in September - Javouhey, French Guiana
  • Average UV index in September: 7

The months with the highest UV index are July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June and December (UV index 6).

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Average cloud cover in September
Javouhey, French Guiana

Average cloud cover in September - Javouhey, French Guiana
  • Average cloud cover in September: 34

The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 34).

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Average visibility in September
Javouhey, French Guiana

Average visibility in September - Javouhey, French Guiana
  • Average visibility in September: 8km

The months with the highest visibility are February, March and April (9km).
The months with the lowest visibility are June, July and August (7km).

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Javouhey, French Guiana

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