December weather forecastSan Isidro, Philippines
December
Weather in December
The first month of the winter, December, is still a warm month in San Isidro, Philippines, with an average temperature varying between 21.7°C (71.1°F) and 29.5°C (85.1°F).Temperature
In December, San Isidro's weather conditions record an average high-temperature of a warm 29.5°C (85.1°F), demonstrating little divergence from the preceding month. In December, San Isidro's temperature tends to fall to an average low of 21.7°C (71.1°F) during the night.Heat index
The heat index value for December is computed to be a sweltering 36°C (96.8°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
In December, the average relative humidity is 81%.Rainfall
In December, in San Isidro, the rain falls for 16.4 days. Throughout December, 89mm (3.5") of precipitation is accumulated. In San Isidro, during the entire year, the rain falls for 252.9 days and collects up to 1795mm (70.67") of precipitation.Daylight
The month with the shortest days is December, with an average of 11h and 12min of daylight.On the first day of the month, sunrise is at 6:06 am and sunset at 5:24 pm. On the last day of December, sunrise is at 6:22 am and sunset at 5:36 pm PST.
Sunshine
In San Isidro, the average sunshine in December is 6.5h.UV index
The months with the lowest UV index are January, July, September through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
San Isidro, Philippines
- Average high temperature in December: 29.5°C
The warmest month (with the highest average high temperature) is April (33.5°C).
The month with the lowest average high temperature is January (28.8°C).
- Average low temperature in December: 21.7°C
The month with the highest average low temperature is May (24.8°C).
The coldest month (with the lowest average low temperature) is January (20.6°C).
Average pressure in December
San Isidro, Philippines
- Average pressure in December: 1011.6mbar
The month with the highest atmospheric pressure is February (1013.5mbar).
The month with the lowest atmospheric pressure is August (1007.6mbar).
Average wind speed in December
San Isidro, Philippines
- Average wind speed in December: 7.7km/h
The windiest months (with the highest average wind speed) are January and December (7.7km/h).
The calmest month (with the lowest average wind speed) is May (5.4km/h).
Average humidity in December
San Isidro, Philippines
- Average humidity in December: 81%
The months with the highest relative humidity are August and September (86%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
San Isidro, Philippines
- Average rainfall in December: 89mm
The wettest month (with the highest rainfall) is July (306mm).
The driest month (with the least rainfall) is February (23mm).
Average rainfall days in December
San Isidro, Philippines
- Average rainfall days in December: 16.4 days
The month with the highest number of rainy days is July (30.3 days).
The month with the least rainy days is February (9.7 days).
Average daylight in December /
Average sunshine in December
San Isidro, Philippines
- Average daylight in December: 11h and 12min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in December: 6h and 30min
The month with the most sunshine is April (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in December
San Isidro, Philippines
- Average sunshine days in December: 12.9 days
The month with the most sunshine days is March (17.3 days).
The month with the least sunshine days is July (0.5 days).
Average UV index in December
San Isidro, Philippines
- Average UV index in December: 6
The months with the highest UV index are February, March, April, May, June and August (UV index 7).
The months with the lowest UV index are January, July, September, October, November and December (UV index 6).
Average cloud cover in December
San Isidro, Philippines
- Average cloud cover in December: 36
The month with the most cloud cover is August (Cloud cover 57).
The month with the least cloud cover is March (Cloud cover 31).
Average visibility in December
San Isidro, Philippines
- Average visibility in December: 8km
The months with the highest visibility are January, February, March, April, May and June (9km).
The months with the lowest visibility are July, August, September, October, November and December (8km).
