Average Weather in Si Bun Rueang Thailand
In Si Bun Rueang, 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 61°F to 96°F and is rarely below 54°F or above 103°F.
Based on the tourism score, the best time of year to visit Si Bun Rueang for warm-weather activities is from late November to mid February.
The hot season lasts for 1.9 months, from March 9 to May 6, with an average daily high temperature above 93°F. The hottest day of the year is April 12, with an average high of 96°F and low of 77°F.
The cool season lasts for 2.2 months, from November 20 to January 25, with an average daily high temperature below 86°F. The coldest day of the year is January 1, with an average low of 61°F and high of 84°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
Ayotzintepec, Mexico (9,746 miles away); Cuiabá, Brazil (11,012 miles); and Chikwawa, Malawi (5,135 miles) are the far-away foreign places with temperatures most similar to Si Bun Rueang (view comparison).
In Si Bun Rueang, 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 Si Bun Rueang begins around October 25 and lasts for 5.6 months, ending around April 12. On February 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 65% of the time, and overcast or mostly cloudy 35% of the time.
The cloudier part of the year begins around April 12 and lasts for 6.4 months, ending around October 25. On June 17, the cloudiest day of the year, the sky is overcast or mostly cloudy 92% of the time, and clear, mostly clear, or partly cloudy 8% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Si Bun Rueang varies very significantly throughout the year.
The wetter season lasts 5.6 months, from April 23 to October 12, with a greater than 32% chance of a given day being a wet day. The chance of a wet day peaks at 64% on September 4.
The drier season lasts 6.4 months, from October 12 to April 23. The smallest chance of a wet day is 1% on December 20.
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 64% on September 4.
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. Si Bun Rueang experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.0 months, from February 18 to November 19, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 5, with an average total accumulation of 8.3 inches.
The rainless period of the year lasts for 3.0 months, from November 19 to February 18. The least rain falls around December 22, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall
The length of the day in Si Bun Rueang varies over the course of the year. In 2018, the shortest day is December 22, with 11 hours, 7 minutes of daylight; the longest day is June 21, with 13 hours, 9 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:36 AM on June 4, and the latest sunrise is 1 hour, 7 minutes later at 6:43 AM on January 20. The earliest sunset is at 5:34 PM on November 23, and the latest sunset is 1 hour, 14 minutes later at 6:48 PM on July 7.
Daylight saving time (DST) is not observed in Si Bun Rueang 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.
Si Bun Rueang experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 9.6 months, from February 15 to December 3, during which time the comfort level is muggy, oppressive, or miserable at least 34% of the time. The muggiest day of the year is July 19, with muggy conditions 100% of the time.
The least muggy day of the year is January 4, with muggy conditions 12% of the time.
Humidity Comfort Levels
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 Si Bun Rueang experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.8 months, from October 18 to April 11, with average wind speeds of more than 6.1 miles per hour. The windiest day of the year is December 13, with an average hourly wind speed of 7.3 miles per hour.
The calmer time of year lasts for 6.2 months, from April 11 to October 18. The calmest day of the year is September 16, with an average hourly wind speed of 5.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Si Bun Rueang varies throughout the year.
The wind is most often from the south for 2.6 months, from March 22 to June 9, with a peak percentage of 52% on May 23. The wind is most often from the west for 3.1 months, from June 9 to September 13, with a peak percentage of 63% on August 3. The wind is most often from the east for 6.3 months, from September 13 to March 22, with a peak percentage of 76% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Si Bun Rueang 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 Si Bun Rueang for general outdoor tourist activities is from late November to mid 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 Si Bun Rueang for hot-weather activities are from early February to late March and from late October to late November, with a peak score in the last week of February.
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 Si Bun Rueang 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 2.4 months, from February 11 to April 25, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest day of the year is March 29, with an average of 6.0 kWh.
The darker period of the year lasts for 2.6 months, from June 28 to September 15, with an average daily incident shortwave energy per square meter below 4.6 kWh. The darkest day of the year is August 25, with an average of 4.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Si Bun Rueang are 16.967 deg latitude, 102.276 deg longitude, and 679 ft elevation.
The topography within 2 miles of Si Bun Rueang contains only modest variations in elevation, with a maximum elevation change of 125 feet and an average elevation above sea level of 673 feet. Within 10 miles contains only modest variations in elevation (1,581 feet). Within 50 miles contains very significant variations in elevation (3,953 feet).
The area within 2 miles of Si Bun Rueang is covered by cropland (100%), within 10 miles by cropland (99%), and within 50 miles by cropland (72%) and trees (22%).
This report illustrates the typical weather in Si Bun Rueang, 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
There are 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Si Bun Rueang.
For each station, the records are corrected for the elevation difference between that station and Si Bun Rueang according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Si Bun Rueang is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Si Bun Rueang and a given station.
The stations contributing to this reconstruction are: Udon Thani International Airport (28%, 72 kilometers, northeast); Khon Kaen Airport (25%, 78 kilometers, southeast); Loei Airport (24%, 79 kilometers, northwest); Phetchabun Airport (13%, 120 kilometers, west); and Chaiyaphum (11%, 132 kilometers, south).
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.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.