May weather forecastDumai, Indonesia
May
Weather in May
May, the last month of the spring in Dumai, is also a hot month, with an average temperature ranging between min 24.7°C (76.5°F) and max 32.5°C (90.5°F).Temperature
May experiences an average high-temperature of a still hot 32.5°C (90.5°F), barely different from April's 32.2°C (90°F). Throughout May, an average nighttime temperature of 24.7°C (76.5°F) is experienced.Heat index
For most parts of May, the heat index is calculated to be a blazing hot 47°C (116.6°F). Be cautious: Heat exhaustion along with heat cramps are predicted. Heatstroke is a possible consequence of continuous physical effort.It is important to note that the heat index values are for shaded areas and light wind scenarios. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.
Humidity
In Dumai, the average relative humidity in May is 81%.Rainfall
In Dumai, in May, during 25.9 rainfall days, 119mm (4.69") of precipitation is typically accumulated. In Dumai, during the entire year, the rain falls for 286.4 days and collects up to 1200mm (47.24") of precipitation.Sea temperature
May and June, with an average sea temperature of 30.2°C (86.4°F), are months with the warmest seawater.Note: The charm of diving into cool waters is arguably lost when temperatures surpass 30°C (86°F).
Daylight
In May, the average length of the day is 12h and 12min.On the first day of May, sunrise is at 06:06 and sunset at 18:16. On the last day of the month, sunrise is at 06:05 and sunset at 18:18 WIB.
Sunshine
In May, the average sunshine is 8.3h.UV index
January through September and November, with an average maximum UV index of 7, are months with the highest UV index in Dumai. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 7 in May leads to these recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Attention! UV strength is notably upped by the reflection of sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Dumai, Indonesia
- Average high temperature in May: 32.5°C
The warmest month (with the highest average high temperature) is June (32.8°C).
The months with the lowest average high temperature are January and December (30.6°C).
- Average low temperature in May: 24.7°C
The month with the highest average low temperature is May (24.7°C).
The coldest month (with the lowest average low temperature) is December (23.7°C).
Average pressure in May
Dumai, Indonesia
- Average pressure in May: 1008.8mbar
The months with the highest atmospheric pressure are January and February (1010.3mbar).
The month with the lowest atmospheric pressure is May (1008.8mbar).
Average wind speed in May
Dumai, Indonesia
- Average wind speed in May: 4.6km/h
The windiest month (with the highest average wind speed) is February (5.8km/h).
The calmest month (with the lowest average wind speed) is April (4.5km/h).
Average humidity in May
Dumai, Indonesia
- Average humidity in May: 81%
The months with the highest relative humidity are November and December (83%).
The month with the lowest relative humidity is February (78%).
Average rainfall in May
Dumai, Indonesia
- Average rainfall in May: 119mm
The wettest month (with the highest rainfall) is October (142mm).
The driest month (with the least rainfall) is February (52mm).
Average rainfall days in May
Dumai, Indonesia
- Average rainfall days in May: 25.9 days
The month with the highest number of rainy days is November (26.4 days).
The month with the least rainy days is February (18.7 days).
Average sea temperature in May
Dumai, Indonesia
- Average sea temperature in May: 30.2°C
The best months for swimming (with the highest average sea temperature) are May and June (30.2°C).
The coldest month (with the lowest average sea temperature) is January (28.4°C).
Average daylight in May /
Average sunshine in May
Dumai, Indonesia
- Average daylight in May: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 12min).
The month with the shortest days is December (Average daylight: 12h and 0min).
- Average sunshine in May: 8h and 18min
The month with the most sunshine is October (Average sunshine: 8h and 48min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in May
Dumai, Indonesia
- Average sunshine days in May: 3.9 days
The month with the most sunshine days is June (7.2 days).
The month with the least sunshine days is November (3 days).
Average UV index in May
Dumai, Indonesia
- Average UV index in May: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September and November (UV index 7).
The months with the lowest UV index are October and December (UV index 6).
Average cloud cover in May
Dumai, Indonesia
- Average cloud cover in May: 41
The month with the most cloud cover is November (Cloud cover 54).
The months with the least cloud cover are February and June (Cloud cover 39).
Average visibility in May
Dumai, Indonesia
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are November and December (8km).
