May weather forecastPematangsiantar, Indonesia
May
Weather in May
The last month of the spring, May, is another warm month in Pematangsiantar, Indonesia, with an average temperature ranging between max 29.5°C (85.1°F) and min 21.3°C (70.3°F).Temperature
Pematangsiantar observes an average high-temperature of a still warm 29.5°C (85.1°F) in May, barely different from 29.2°C (84.6°F) in April. During May nights, Pematangsiantar records an average temperature of 21.3°C (70.3°F).Heat index
The average heat index in May is evaluated at a very hot 37°C (98.6°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', reflects the blend of air temperature and relative humidity to give a temperature impression. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
In May, the average relative humidity is 85%.Rainfall
In Pematangsiantar, Indonesia, during May, the rain falls for 27.4 days and regularly aggregates up to 230mm (9.06") of precipitation. Throughout the year, there are 317.9 rainfall days, and 2279mm (89.72") of precipitation is accumulated.Daylight
The average length of the day in May in Pematangsiantar is 12h and 16min.On the first day of May, sunrise is at 06:14 and sunset at 18:27. On the last day of the month, sunrise is at 06:13 and sunset at 18:29 WIB.
Sunshine
The average sunshine in May in Pematangsiantar is 8h.UV index
The months with the highest UV index in Pematangsiantar are January through December, with an average maximum UV index of 6. January through December, with an average maximum UV index of 6, are months with the lowest UV index in Pematangsiantar. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 6 in May translates into the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Pematangsiantar, Indonesia
- Average high temperature in May: 29.5°C
The warmest month (with the highest average high temperature) is June (30.1°C).
The month with the lowest average high temperature is December (27.7°C).
- Average low temperature in May: 21.3°C
The month with the highest average low temperature is May (21.3°C).
The coldest month (with the lowest average low temperature) is January (20°C).
Average pressure in May
Pematangsiantar, Indonesia
- Average pressure in May: 1009.6mbar
The month with the highest atmospheric pressure is January (1010.8mbar).
The month with the lowest atmospheric pressure is May (1009.6mbar).
Average wind speed in May
Pematangsiantar, Indonesia
- Average wind speed in May: 4.3km/h
The windiest month (with the highest average wind speed) is February (4.8km/h).
The calmest month (with the lowest average wind speed) is November (4km/h).
Average humidity in May
Pematangsiantar, Indonesia
- Average humidity in May: 85%
The months with the highest relative humidity are January, November and December (87%).
The months with the lowest relative humidity are June, July and August (82%).
Average rainfall in May
Pematangsiantar, Indonesia
- Average rainfall in May: 230mm
The wettest month (with the highest rainfall) is April (237mm).
The driest month (with the least rainfall) is February (127mm).
Average rainfall days in May
Pematangsiantar, Indonesia
- Average rainfall days in May: 27.4 days
The month with the highest number of rainy days is December (29.3 days).
The month with the least rainy days is June (22.6 days).
Average daylight in May /
Average sunshine in May
Pematangsiantar, Indonesia
- 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: 8h and 0min
The months with the most sunshine are March and August (Average sunshine: 8h and 18min).
The months with the least sunshine are January and December (Average sunshine: 7h and 12min).
Average sunshine days in May
Pematangsiantar, Indonesia
- Average sunshine days in May: 2.8 days
The month with the most sunshine days is June (6.1 days).
The month with the least sunshine days is December (0.8 days).
Average UV index in May
Pematangsiantar, Indonesia
- Average UV index in May: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in May
Pematangsiantar, Indonesia
- Average cloud cover in May: 43
The month with the most cloud cover is December (Cloud cover 52).
The months with the least cloud cover are June, July and August (Cloud cover 39).
Average visibility in May
Pematangsiantar, Indonesia
- Average visibility in May: 7km
The months with the highest visibility are March, June, July, August, September, October and November (8km).
The months with the lowest visibility are January, February, April, May and December (7km).
