May weather forecastSiminiout, French Guiana

May

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).

Temperature

May's entry sees an average high-temperature of a still warm 28.8°C (83.8°F), replicating April's climate. An average low-temperature of 22.3°C (72.1°F) marks the month of May.

Heat index

The heat index for May is appraised at a sweltering 37°C (98.6°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

With an average relative humidity of 91%, May is the most humid month.

Rainfall

May is the month with the most rainfall in Siminiout. Rain falls for 28.9 days and accumulates 195mm (7.68") of precipitation.

Daylight

In May, the average length of the day in Siminiout, French Guiana, is 12h and 15min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:35. On the last day of May, in Siminiout, sunrise is at 06:20 and sunset at 18:37 -03.

Sunshine

In May, the average sunshine in Siminiout is 5.5h.

UV index

January through July, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: During May, 6 as the daily maximum UV index converts into the following advice:
Fend off overexposure. Sun protection is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Siminiout in May has an average high-temperature of 28.8°C (83.8°F) and an average low-temperature of 22.3°C (72.1°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in May is appraised at 37°C (98.6°F).

With an average relative humidity of 91%, May is the most humid month.

The average relative humidity in May in Siminiout, French Guiana, is 91%.

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.

In Siminiout, French Guiana, in May, during 28.9 rainfall days, 195mm (7.68") of precipitation is typically accumulated.

The average day length in May in Siminiout is 12h and 15min.

In May, on the first day of the month, sunrise is at 06:21 and sunset at 18:35. On the last day of the month, sunrise is at 06:20 and sunset at 18:37 -03.

In May, the average sunshine duration in Siminiout is 5.5h.

January through July, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Siminiout.

In Siminiout, French Guiana, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

28.8°C

29.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.8km/h

5.3km/h

4.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

2.7

1.8

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Siminiout, French Guiana

Average high temperature in May: 28.8°C

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).

Average low temperature in May: 22.3°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 in May
Siminiout, French Guiana

Average pressure in May: 1012.3mbar

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 in May
Siminiout, French Guiana

Average wind speed in May: 4.7km/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 in May
Siminiout, French Guiana

Average humidity in May: 91%

The month with the highest relative humidity is May (91%).
The month with the lowest relative humidity is October (75%).

Average rainfall in May
Siminiout, French Guiana

Average rainfall in May: 195mm

The wettest month (with the highest rainfall) is May (195mm).
The driest month (with the least rainfall) is September (21mm).

Average rainfall days in May
Siminiout, French Guiana

Average rainfall days in May: 28.9 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 in May /
Average sunshine in May
Siminiout, French Guiana

Average daylight in May: 12h and 18min

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 May: 5h and 30min

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 in May
Siminiout, French Guiana

Average sunshine days in May: 1.8 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 in May
Siminiout, French Guiana

Average UV index in May: 6

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 in May
Siminiout, French Guiana

Average cloud cover in May: 73

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 in May
Siminiout, French Guiana

Average visibility in May: 6km

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).