May weather forecastCalasiao, Philippines
May
Weather in May
May, the last month of the spring in Calasiao, is another hot month, with an average temperature ranging between min 25.5°C (77.9°F) and max 34.4°C (93.9°F).Temperature
May's onset records an average high-temperature of a still hot 34.4°C (93.9°F), a near match to April's 34.5°C (94.1°F). Nighttime temperatures consistently average a moderately hot 25.5°C (77.9°F) during May.Heat index
The heat index value during May is computed to be a burning hot 48°C (118.4°F). Attention: Heat exhaustion and heat cramps are anticipated. Prolonged effort can result in heatstroke.One should consider that heat index numbers are for shaded settings and light wind. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', reflects the feeling of heat when considering both air temperature and humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.
Humidity
The average relative humidity in May is 70%.Rainfall
In Calasiao, in May, during 18.3 rainfall days, 66mm (2.6") of precipitation is typically accumulated. Throughout the year, there are 187.6 rainfall days, and 1079mm (42.48") of precipitation is accumulated.Daylight
The average length of the day in May is 12h and 53min.On the first day of the month, sunrise is at 5:34 am and sunset at 6:17 pm. On the last day of May, sunrise is at 5:25 am and sunset at 6:26 pm PST.
Sunshine
The average sunshine in May is 11.3h.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, 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 ordinary individuals.Note: The UV index of 7 during May leads to these advisories:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Calasiao, Philippines
- Average high temperature in May: 34.4°C
The warmest month (with the highest average high temperature) is April (34.5°C).
The month with the lowest average high temperature is August (30.5°C).
- Average low temperature in May: 25.5°C
The month with the highest average low temperature is May (25.5°C).
The coldest month (with the lowest average low temperature) is January (21.6°C).
Average pressure in May
Calasiao, Philippines
- Average pressure in May: 1009.6mbar
The month with the highest atmospheric pressure is February (1013.8mbar).
The month with the lowest atmospheric pressure is August (1007.5mbar).
Average wind speed in May
Calasiao, Philippines
- Average wind speed in May: 7.5km/h
The windiest months (with the highest average wind speed) are January, February and April (8.2km/h).
The calmest month (with the lowest average wind speed) is September (7.3km/h).
Average humidity in May
Calasiao, Philippines
- Average humidity in May: 70%
The month with the highest relative humidity is September (83%).
The months with the lowest relative humidity are March and April (67%).
Average rainfall in May
Calasiao, Philippines
- Average rainfall in May: 66mm
The wettest month (with the highest rainfall) is August (240mm).
The driest month (with the least rainfall) is January (7mm).
Average rainfall days in May
Calasiao, Philippines
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is July (28.4 days).
The month with the least rainy days is January (3.8 days).
Average daylight in May /
Average sunshine in May
Calasiao, Philippines
- Average daylight in May: 12h and 54min
The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in May: 11h and 18min
The month with the most sunshine is April (Average sunshine: 11h and 30min).
The months with the least sunshine are January and December (Average sunshine: 7h and 24min).
Average sunshine days in May
Calasiao, Philippines
- Average sunshine days in May: 9.3 days
The month with the most sunshine days is January (26.8 days).
The month with the least sunshine days is July (2 days).
Average UV index in May
Calasiao, Philippines
- Average UV index in May: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in May
Calasiao, Philippines
- Average cloud cover in May: 27
The month with the most cloud cover is August (Cloud cover 45).
The months with the least cloud cover are January, February and December (Cloud cover 20).
Average visibility in May
Calasiao, Philippines
- Average visibility in May: 10km
The months with the highest visibility are January, February, March, April, May, November and December (10km).
The months with the lowest visibility are June, July, August, September and October (9km).





