June weather forecast
Grand-Santi, French Guiana

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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. The witnessing of slight decreases in rainfall amounts signifies drier weather patterns. One distinguishing factor for June is the rise in sunshine hours, reaching a commendable 7.1 hours per day, hinting at more sun-oriented activities.

Temperature

The shift into June reveals an average high-temperature of a still hot 30.4°C (86.7°F), closely mirroring May's climate. The average temperature during June nights dips to an agreeable 21.8°C (71.2°F).

Heat index

The average heat index in June is calculated to be a blistering 42°C (107.6°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Heat index evaluations are typically in the context of light winds and shaded environments. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In June, the average relative humidity in Grand-Santi, French Guiana, is 89%.

Rainfall

In June, the rain falls for 22.8 days. Throughout June, 94mm (3.7") of precipitation is accumulated. In Grand-Santi, during the entire year, the rain falls for 259.6 days and collects up to 915mm (36.02") of precipitation.

Daylight

June has the longest days of the year, with an average of 12h and 24min of daylight.
On the first day of June, sunrise is at 06:24 and sunset at 18:46. On the last day of the month, sunrise is at 06:30 and sunset at 18:52 -03.

Sunshine

The average sunshine in June in Grand-Santi is 7.1h.

UV index

The average daily maximum UV index in June is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum UV index of 6 in June translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely.

Frequently asked questions

How hot is June in Grand-Santi?

The average high-temperature, in June, in Grand-Santi, is 30.4°C (86.7°F), while the average low-temperature is 21.8°C (71.2°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in June is calculated to be 42°C (107.6°F).

What is the average humidity in June in Grand-Santi?

The average relative humidity in June is 89%.

How many days does it rain in June in Grand-Santi?

In Grand-Santi, French Guiana, in June, during 22.8 rainfall days, 94mm (3.7") of precipitation is typically accumulated.

When are the longest days in Grand-Santi?

June has the longest days of the year in Grand-Santi, with an average of 12h and 24min of daylight.

How many hours of daylight does Grand-Santi have in June?

In Grand-Santi, French Guiana, the average day length in June is 12h and 22min.

When is the sunrise / sunset in June in Grand-Santi?

In June, on the first day of the month, sunrise is at 06:24 and sunset at 18:46. On the last day of the month, in Grand-Santi, French Guiana, sunrise is at 06:30 and sunset at 18:52 -03.

How long on average sun shines in June in Grand-Santi?

The average sunshine duration in June in Grand-Santi, French Guiana, is 7.1h.

What is the UV index intensity in June in Grand-Santi?

The average daily maximum UV index in June in Grand-Santi, French Guiana, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from 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 June
Grand-Santi, French Guiana

Average temperature in June - Grand-Santi, French Guiana
  • Average high temperature in June: 30.4°C

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).

  • Average low temperature in June: 21.8°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 in June
Grand-Santi, French Guiana

Average pressure in June - Grand-Santi, French Guiana
  • Average pressure in June: 1012.9mbar

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 in June
Grand-Santi, French Guiana

Average wind speed in June - Grand-Santi, French Guiana
  • Average wind speed in June: 4.5km/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 in June
Grand-Santi, French Guiana

Average humidity in June - Grand-Santi, French Guiana
  • Average humidity in June: 89%

The month with the highest relative humidity is May (90%).
The month with the lowest relative humidity is October (73%).

Average rainfall in June
Grand-Santi, French Guiana

Average rainfall in June - Grand-Santi, French Guiana
  • 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 in June
Grand-Santi, French Guiana

Average rainfall days in June - Grand-Santi, French Guiana
  • Average rainfall days in June: 22.8 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 in June /
Average sunshine in June
Grand-Santi, French Guiana

Average daylight in June / Average sunshine in June - Grand-Santi, French Guiana
  • Average daylight in June: 12h and 2min

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 June: 7h 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: 4h and 30min).

Average sunshine days in June
Grand-Santi, French Guiana

Average sunshine days in June - Grand-Santi, French Guiana
  • Average sunshine days in June: 5.8 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 in June
Grand-Santi, French Guiana

Average UV index in June - Grand-Santi, French Guiana
  • Average UV index in June: 6

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 in June
Grand-Santi, French Guiana

Average cloud cover in June - Grand-Santi, French Guiana
  • Average cloud cover in June: 70

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 in June
Grand-Santi, French Guiana

Average visibility in June - Grand-Santi, French Guiana
  • Average visibility in June: 6km

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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