Climate and Average Weather Year Round in Tha Tum Thailand

In Tha Tum, the wet season is oppressive and overcast, the dry season is humid and partly cloudy, and it is hot year round. Over the course of the year, the temperature typically varies from 65°F to 96°F and is rarely below 58°F or above 102°F.

Based on the tourism score, the best time of year to visit Tha Tum for warm-weather activities is from late November to early February.

The hot season lasts for 2.1 months, from March 2 to May 5, with an average daily high temperature above 94°F. The hottest month of the year in Tha Tum is April, with an average high of 95°F and low of 78°F.

The cool season lasts for 4.6 months, from August 28 to January 17, with an average daily high temperature below 88°F. The coldest month of the year in Tha Tum is December, with an average low of 66°F and high of 86°F.

In Tha Tum, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Tha Tum begins around October 28 and lasts for 5.1 months, ending around April 2.

The clearest month of the year in Tha Tum is January, during which on average the sky is clear, mostly clear, or partly cloudy 59% of the time.

The cloudier part of the year begins around April 2 and lasts for 6.8 months, ending around October 28.

The cloudiest month of the year in Tha Tum is June, during which on average the sky is overcast or mostly cloudy 93% 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 Tha Tum varies very significantly throughout the year.

The wetter season lasts 5.7 months, from April 23 to October 13, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Tha Tum is September, with an average of 16.9 days with at least 0.04 inches of precipitation.

The drier season lasts 6.3 months, from October 13 to April 23. The month with the fewest wet days in Tha Tum is December, with an average of 0.3 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 Tha Tum is September, with an average of 16.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 61% on September 7.

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. Tha Tum experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.9 months, from February 23 to November 20, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Tha Tum is September, with an average rainfall of 8.6 inches.

The rainless period of the year lasts for 3.1 months, from November 20 to February 23. The month with the least rain in Tha Tum is December, with an average rainfall of 0.1 inches.

The length of the day in Tha Tum varies over the course of the year. In 2024, the shortest day is December 21, with 11 hours, 13 minutes of daylight; the longest day is June 21, with 13 hours, 2 minutes of daylight.

The earliest sunrise is at 5:33 AM on June 3, and the latest sunrise is 1 hour, 2 minutes later at 6:35 AM on January 22. The earliest sunset is at 5:31 PM on November 21, and the latest sunset is 1 hour, 8 minutes later at 6:40 PM on July 7.

Daylight saving time (DST) is not observed in Tha Tum 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.

Tha Tum experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 9.9 months, from February 11 to December 8, during which time the comfort level is muggy, oppressive, or miserable at least 39% of the time.

The month with the fewest muggy days in Tha Tum is January, with 6.5 days that are muggy or worse.

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 Tha Tum experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.5 months, from October 31 to February 14, with average wind speeds of more than 7.9 miles per hour. The windiest month of the year in Tha Tum is December, with an average hourly wind speed of 9.9 miles per hour.

The calmer time of year lasts for 8.5 months, from February 14 to October 31. The calmest month of the year in Tha Tum is September, with an average hourly wind speed of 6.0 miles per hour.

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

The wind is most often from the south for 4.1 months, from March 16 to July 18 and for 3.0 days, from September 19 to September 22, with a peak percentage of 59% on May 22. The wind is most often from the east for 1.3 weeks, from September 22 to October 1 and for 2.7 months, from December 26 to March 16, with a peak percentage of 33% on September 30. The wind is most often from the north for 2.8 months, from October 1 to December 26, with a peak percentage of 56% on December 1.

To characterize how pleasant the weather is in Tha Tum 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 Tha Tum for general outdoor tourist activities is from late November to early February, with a peak score in the third week of December.

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 Tha Tum for hot-weather activities are from early January to mid March and from late October to mid December, with a peak score in the second week of February.

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 Tha Tum 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.

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 2.7 months, from January 29 to April 20, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest month of the year in Tha Tum is March, with an average of 5.9 kWh.

The darker period of the year lasts for 3.5 months, from June 6 to September 21, with an average daily incident shortwave energy per square meter below 4.5 kWh. The darkest month of the year in Tha Tum is August, with an average of 4.3 kWh.

For the purposes of this report, the geographical coordinates of Tha Tum are 15.319 deg latitude, 103.675 deg longitude, and 433 ft elevation.

The topography within 2 miles of Tha Tum contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 436 feet. Within 10 miles also contains only modest variations in elevation (249 feet). Within 50 miles contains only modest variations in elevation (640 feet).

The area within 2 miles of Tha Tum is covered by cropland (70%) and shrubs (30%), within 10 miles by cropland (55%) and herbaceous vegetation (24%), and within 50 miles by cropland (66%) and shrubs (24%).