Average Weather at Calapan Philippines
At Calapan, the summers are short, hot, and overcast; the winters are short, warm, windy, and partly cloudy; and it is oppressive and wet year round. Over the course of the year, the temperature typically varies from 75°F to 90°F and is rarely below 72°F or above 93°F.
Based on the beach/pool score, the best time of year to visit Calapan for hot-weather activities is from late December to early April.
The hot season lasts for 2.3 months, from April 13 to June 22, with an average daily high temperature above 88°F. The hottest day of the year is May 17, with an average high of 90°F and low of 78°F.
The cool season lasts for 2.5 months, from December 3 to February 18, with an average daily high temperature below 84°F. The coldest day of the year is January 28, with an average low of 75°F and high of 83°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
Barranquilla, Colombia (10,439 miles away); Fortaleza, Brazil (10,913 miles); and Recife, Brazil (10,784 miles) are the far-away foreign places with temperatures most similar to Calapan (view comparison).
At Calapan, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year at Calapan begins around November 26 and lasts for 5.0 months, ending around April 26. On March 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 50% of the time, and overcast or mostly cloudy 50% of the time.
The cloudier part of the year begins around April 26 and lasts for 7.0 months, ending around November 26. On August 21, the cloudiest day of the year, the sky is overcast or mostly cloudy 93% of the time, and clear, mostly clear, or partly cloudy 7% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Calapan varies significantly throughout the year.
The wetter season lasts 7.0 months, from May 30 to December 31, with a greater than 37% chance of a given day being a wet day. The chance of a wet day peaks at 58% on October 22.
The drier season lasts 5.0 months, from December 31 to May 30. The smallest chance of a wet day is 17% on March 27.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 58% on October 22.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Calapan experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year at Calapan. The most rain falls during the 31 days centered around October 23, with an average total accumulation of 9.1 inches.
The least rain falls around March 17, with an average total accumulation of 1.8 inches.
Average Monthly Rainfall
The length of the day at Calapan varies over the course of the year. In 2018, the shortest day is December 22, with 11 hours, 20 minutes of daylight; the longest day is June 21, with 12 hours, 55 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:27 AM on June 2, and the latest sunrise is 56 minutes later at 6:22 AM on January 24. The earliest sunset is at 5:24 PM on November 20, and the latest sunset is 1 hour, 2 minutes later at 6:26 PM on July 10.
Daylight saving time (DST) is not observed at Calapan during 2018.
Sunrise & Sunset with Twilight
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The perceived humidity level at Calapan, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 100% throughout.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed at Calapan experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.2 months, from October 28 to April 5, with average wind speeds of more than 8.6 miles per hour. The windiest day of the year is December 28, with an average hourly wind speed of 11.6 miles per hour.
The calmer time of year lasts for 6.7 months, from April 5 to October 28. The calmest day of the year is June 2, with an average hourly wind speed of 5.7 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Calapan varies throughout the year.
The wind is most often from the west for 3.1 months, from June 25 to September 28, with a peak percentage of 60% on August 18. The wind is most often from the east for 8.9 months, from September 28 to June 25, with a peak percentage of 83% on January 1.
Calapan is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.8 months, from April 27 to July 22, with an average temperature above 84°F. The day of the year with the warmest water is June 10, with an average temperature of 86°F.
The time of year with cooler water lasts for 2.6 months, from December 23 to March 11, with an average temperature below 81°F. The day of the year with the coolest water is January 26, with an average temperature of 79°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is at Calapan throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Calapan for general outdoor tourist activities is from late December to mid March, with a peak score in the third week of January.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Calapan for hot-weather activities is from late December to early April, with a peak score in the first week of March.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
Temperatures at Calapan are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
Growing Degree Days
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.
The brighter period of the year lasts for 2.3 months, from February 23 to May 1, with an average daily incident shortwave energy per square meter above 6.2 kWh. The brightest day of the year is April 8, with an average of 6.7 kWh.
The darker period of the year lasts for 6.3 months, from June 2 to December 12, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest day of the year is July 5, with an average of 3.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Calapan are 13.417 deg latitude, 121.200 deg longitude, and 0 ft elevation.
The topography within 2 miles of Calapan contains significant variations in elevation, with a maximum elevation change of 630 feet and an average elevation above sea level of 69 feet. Within 10 miles also contains significant variations in elevation (650 feet). Within 50 miles contains significant variations in elevation (8,455 feet).
The area within 2 miles of Calapan is covered by water (46%), trees (25%), and cropland (22%), within 10 miles by water (64%) and cropland (17%), and within 50 miles by water (51%) and trees (21%).
This report illustrates the typical weather at Calapan, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
Calapan has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.