July weather forecast
Grand-Santi, French Guiana

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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. The residents a marked increase in UV index levels, standing at 7, signaling the provision for protective measures. The distinct feature of July is the increased sunshine duration, which climbs to 7.9 hours per day, awarding more opportunities for outdoor leisure.

Temperature

The onset of July brings with it an average high-temperature of a still hot 31.3°C (88.3°F), showing a negligible variation from the month before. Nightly temperatures in Grand-Santi, French Guiana, drop to an average low of 21.1°C (70°F) in July.

Heat index

The heat index for July is calculated to be a blistering 44°C (111.2°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. 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

The average relative humidity in July in Grand-Santi is 85%.

Rainfall

In Grand-Santi, in July, it is raining for 19.8 days, with typically 62mm (2.44") of accumulated precipitation. Throughout the year, there are 259.6 rainfall days, and 915mm (36.02") of precipitation is accumulated.

Daylight

In July, the average length of the day in Grand-Santi is 12h and 20min.
On the first day of the month, sunrise is at 06:30 and sunset at 18:52. On the last day of July, in Grand-Santi, sunrise is at 06:34 and sunset at 18:53 -03.

Sunshine

In Grand-Santi, the average sunshine in July is 7.9h.

UV index

The months with the highest UV index in Grand-Santi, French Guiana, are July through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index, 7 in July, converts into the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.

Frequently asked questions

How hot is it in Grand-Santi in July?

The average high-temperature, in July, in Grand-Santi, is 31.3°C (88.3°F), while the average low-temperature is 21.1°C (70°F). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is calculated to be 44°C (111.2°F).

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

In July, the average relative humidity in Grand-Santi, French Guiana, is 85%.

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

In Grand-Santi, during July, the rain falls for 19.8 days and regularly aggregates up to 62mm (2.44") of precipitation.

What is the average length of the day in July in Grand-Santi?

In Grand-Santi, French Guiana, the average day length in July is 12h and 20min.

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

On the first day of July, sunrise is at 06:30 and sunset at 18:52. On the last day of the month, sunrise is at 06:34 and sunset at 18:53 -03.

How many hours of sunshine does Grand-Santi have in July?

The average sunshine duration in July in Grand-Santi is 7.9h.

When is the highest UV index in Grand-Santi?

The months with the highest UV index in Grand-Santi are July through November, with an average maximum UV index of 7.

What is the UV index reading in July in Grand-Santi?

In July, the average daily maximum UV index in Grand-Santi, French Guiana, is 7. A UV Index value of 6 to 7 symbolizes a high health risk 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 July
Grand-Santi, French Guiana

Average temperature in July - Grand-Santi, French Guiana
  • Average high temperature in July: 31.3°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 July: 21.1°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 July
Grand-Santi, French Guiana

Average pressure in July - Grand-Santi, French Guiana
  • Average pressure in July: 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 July
Grand-Santi, French Guiana

Average wind speed in July - Grand-Santi, French Guiana
  • Average wind speed in July: 4.4km/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 July
Grand-Santi, French Guiana

Average humidity in July - Grand-Santi, French Guiana
  • Average humidity in July: 85%

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

Average rainfall in July
Grand-Santi, French Guiana

Average rainfall in July - Grand-Santi, French Guiana
  • Average rainfall in July: 62mm

The wettest month (with the highest rainfall) is May (171mm).
The driest month (with the least rainfall) is September (18mm).

Average rainfall days in July
Grand-Santi, French Guiana

Average rainfall days in July - Grand-Santi, French Guiana
  • Average rainfall days in July: 19.8 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 July /
Average sunshine in July
Grand-Santi, French Guiana

Average daylight in July / Average sunshine in July - Grand-Santi, French Guiana
  • Average daylight in July: 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 July: 7h 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 in July
Grand-Santi, French Guiana

Average sunshine days in July - Grand-Santi, French Guiana
  • Average sunshine days in July: 9.6 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 July
Grand-Santi, French Guiana

Average UV index in July - Grand-Santi, French Guiana
  • Average UV index in July: 7

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 July
Grand-Santi, French Guiana

Average cloud cover in July - Grand-Santi, French Guiana
  • Average cloud cover in July: 64

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 July
Grand-Santi, French Guiana

Average visibility in July - Grand-Santi, French Guiana
  • Average visibility in July: 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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