Climate and Average Weather Year Round in Mempawah Indonesia

The climate in Mempawah is hot, oppressive, and overcast. Over the course of the year, the temperature typically varies from 76°F to 90°F and is rarely below 75°F or above 93°F.

Based on the beach/pool score, the best times of year to visit Mempawah for hot-weather activities are from late February to mid March and from late May to late September.

The temperature in Mempawah varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

In Mempawah, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Mempawah begins around May 15 and lasts for 3.7 months, ending around September 6.

The clearest month of the year in Mempawah is July, during which on average the sky is clear, mostly clear, or partly cloudy 26% of the time.

The cloudier part of the year begins around September 6 and lasts for 8.3 months, ending around May 15.

The cloudiest month of the year in Mempawah is January, during which on average the sky is overcast or mostly cloudy 89% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Mempawah varies significantly throughout the year.

The wetter season lasts 7.1 months, from September 29 to May 1, with a greater than 55% chance of a given day being a wet day. The month with the most wet days in Mempawah is November, with an average of 22.0 days with at least 0.04 inches of precipitation.

The drier season lasts 4.9 months, from May 1 to September 29. The month with the fewest wet days in Mempawah is July, with an average of 11.9 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Mempawah is November, with an average of 22.0 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 74% on November 14.

Rainfall

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. Mempawah experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Mempawah. The month with the most rain in Mempawah is December, with an average rainfall of 12.0 inches.

The month with the least rain in Mempawah is August, with an average rainfall of 5.5 inches.

The length of the day in Mempawah does not vary substantially over the course of the year, staying within 8 minutes of 12 hours throughout. In 2024, the shortest day is December 21, with 12 hours, 6 minutes of daylight; the longest day is June 21, with 12 hours, 9 minutes of daylight.

The earliest sunrise is at 5:24 AM on November 3, and the latest sunrise is 31 minutes later at 5:55 AM on February 12. The earliest sunset is at 5:30 PM on November 2, and the latest sunset is 31 minutes later at 6:01 PM on February 11.

Daylight saving time (DST) is not observed in Mempawah during 2024.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

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 in Mempawah, 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.

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 in Mempawah experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.4 months, from November 25 to March 6, with average wind speeds of more than 5.6 miles per hour. The windiest month of the year in Mempawah is January, with an average hourly wind speed of 7.2 miles per hour.

The calmer time of year lasts for 8.6 months, from March 6 to November 25. The calmest month of the year in Mempawah is April, with an average hourly wind speed of 3.9 miles per hour.

The predominant average hourly wind direction in Mempawah varies throughout the year.

The wind is most often from the west for 1.1 months, from March 25 to April 28 and for 1.9 months, from October 14 to December 12, with a peak percentage of 55% on November 10. The wind is most often from the south for 5.5 months, from April 28 to October 14, with a peak percentage of 82% on August 11. The wind is most often from the north for 3.4 months, from December 12 to March 25, with a peak percentage of 64% on January 1.

Mempawah 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 2.9 months, from April 18 to July 15, with an average temperature above 85°F. The month of the year in Mempawah with the warmest water is May, with an average temperature of 86°F.

The time of year with cooler water lasts for 1.7 months, from January 8 to February 29, with an average temperature below 83°F. The month of the year in Mempawah with the coolest water is February, with an average temperature of 82°F.

To characterize how pleasant the weather is in Mempawah 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 times of year to visit Mempawah for general outdoor tourist activities are from late January to late March and from mid June to early October, with a peak score in the third week of July.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Mempawah for hot-weather activities are from late February to mid March and from late May to late September, with a peak score in the last week of June.

Methodology

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 in Mempawah 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.

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.

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.

For the purposes of this report, the geographical coordinates of Mempawah are 0.371 deg latitude, 108.970 deg longitude, and 0 ft elevation.

The topography within 2 miles of Mempawah is essentially flat, with a maximum elevation change of 72 feet and an average elevation above sea level of 20 feet. Within 10 miles is essentially flat (456 feet). Within 50 miles contains only modest variations in elevation (4,715 feet).

The area within 2 miles of Mempawah is covered by trees (46%) and cropland (45%), within 10 miles by water (51%) and trees (32%), and within 50 miles by water (59%) and trees (23%).