May weather forecast
Caldeiras, São Tomé and Príncipe

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Weather in May

May presents a noticeable change in the tropical weather in Caldeiras, starting with a decrease in average high temperature to 27.8°C (82°F). Throughout the month, a total of 122mm (4.8") rainfall is experienced over 20 days. The air tends to be more saturated with higher relative humidity levels, which, along with cloudier skies and lesser sunshine, edges out a cooler period. The gradually decreasing temperature sets the stage for the coming cooler months of the season.

Temperature

The commencement of May introduces an average high-temperature of a still moderately hot 27.8°C (82°F), closely mirroring the preceding month. Caldeiras sees a minor drop to an average minimum temperature of 26.3°C (79.3°F) during the night in the month of May.

Heat index

The average heat index in May is calculated to be a hot 31°C (87.8°F). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

In May, the average relative humidity is 79%.

Rainfall

In Caldeiras, in May, during 20.5 rainfall days, 122mm (4.8") of precipitation is typically accumulated. Throughout the year, in Caldeiras, there are 241.7 rainfall days, and 1287mm (50.67") of precipitation is accumulated.

Daylight

The average length of the day in May in Caldeiras is 12h and 8min.
On the first day of May, sunrise is at 05:26 and sunset at 17:34. On the last day of the month, sunrise is at 05:27 and sunset at 17:35 GMT.

Sunshine

In May, the average sunshine is 7.6h.

UV index

The months with the highest UV index are January through May, October through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In May, the maximum UV index of 7 suggests these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
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Frequently asked questions

What are the temperatures in Caldeiras in May?

The average high-temperature, in May, in Caldeiras, is 27.8°C (82°F), while the average low-temperature is 26.3°C (79.3°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in May is calculated to be 31°C (87.8°F).

What is the average humidity in May in Caldeiras?

The average relative humidity in May in Caldeiras is 79%.

How much does it rain in Caldeiras in May?

In May, the rain falls for 20.5 days. Throughout May, 122mm (4.8") of precipitation is accumulated.

How many hours of daylight does Caldeiras have in May?

In May, the average day length in Caldeiras is 12h and 8min.

When is the sunrise / sunset in May in Caldeiras?

In May, on the first day of the month, sunrise is at 05:26 and sunset at 17:34. On the last day of the month, in Caldeiras, São Tomé and Príncipe, sunrise is at 05:27 and sunset at 17:35 GMT.

How long on average sun shines in May in Caldeiras?

The average sunshine duration in May is 7.6h.

What are the months with the highest UV index in Caldeiras?

The months with the highest UV index in Caldeiras are January through May, October through December, with an average maximum UV index of 7.

What is the UV index intensity in May in Caldeiras?

The average daily maximum UV index in May in Caldeiras is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.

Average temperature in May
Caldeiras, São Tomé and Príncipe

Average temperature in May - Caldeiras, São Tomé and Príncipe
  • Average high temperature in May: 27.8°C

The warmest month (with the highest average high temperature) is March (28.8°C).
The month with the lowest average high temperature is July (24.5°C).

  • Average low temperature in May: 26.3°C

The month with the highest average low temperature is March (27.5°C).
The coldest month (with the lowest average low temperature) is July (23°C).

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Average pressure in May
Caldeiras, São Tomé and Príncipe

Average pressure in May - Caldeiras, São Tomé and Príncipe
  • Average pressure in May: 1011.3mbar

The month with the highest atmospheric pressure is July (1014.3mbar).
The month with the lowest atmospheric pressure is February (1009.8mbar).

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Average wind speed in May
Caldeiras, São Tomé and Príncipe

Average wind speed in May - Caldeiras, São Tomé and Príncipe
  • Average wind speed in May: 13km/h

The windiest month (with the highest average wind speed) is July (17.7km/h).
The calmest month (with the lowest average wind speed) is December (10.8km/h).

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Average humidity in May
Caldeiras, São Tomé and Príncipe

Average humidity in May - Caldeiras, São Tomé and Príncipe
  • Average humidity in May: 79%

The months with the highest relative humidity are August, September and October (83%).
The month with the lowest relative humidity is March (76%).

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Average rainfall in May
Caldeiras, São Tomé and Príncipe

Average rainfall in May - Caldeiras, São Tomé and Príncipe
  • Average rainfall in May: 122mm

The wettest month (with the highest rainfall) is November (224mm).
The driest month (with the least rainfall) is July (9mm).

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Average rainfall days in May
Caldeiras, São Tomé and Príncipe

Average rainfall days in May - Caldeiras, São Tomé and Príncipe
  • Average rainfall days in May: 20.5 days

The month with the highest number of rainy days is December (28.6 days).
The month with the least rainy days is June (7.3 days).

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Average daylight in May /
Average sunshine in May
Caldeiras, São Tomé and Príncipe

Average daylight in May / Average sunshine in May - Caldeiras, São Tomé and Príncipe
  • Average daylight in May: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is December (Average daylight: 12h and 6min).

  • Average sunshine in May: 7h and 4min

The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is August (Average sunshine: 5h and 0min).

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Average sunshine days in May
Caldeiras, São Tomé and Príncipe

Average sunshine days in May - Caldeiras, São Tomé and Príncipe
  • Average sunshine days in May: 9.2 days

The month with the most sunshine days is June (16.4 days).
The month with the least sunshine days is December (1.5 days).

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Average UV index in May
Caldeiras, São Tomé and Príncipe

Average UV index in May - Caldeiras, São Tomé and Príncipe
  • Average UV index in May: 7

The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The month with the lowest UV index is July (UV index 5).

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Average cloud cover in May
Caldeiras, São Tomé and Príncipe

Average cloud cover in May - Caldeiras, São Tomé and Príncipe
  • Average cloud cover in May: 44

The month with the most cloud cover is August (Cloud cover 65).
The month with the least cloud cover is February (Cloud cover 37).

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Average visibility in May
Caldeiras, São Tomé and Príncipe

Average visibility in May - Caldeiras, São Tomé and Príncipe
  • Average visibility in May: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).

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Caldeiras, São Tomé and Príncipe

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