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Average Weather in Pho Si Suwan Thailand

In Pho Si Suwan, 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 64°F to 95°F and is rarely below 58°F or above 101°F.

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

Climate Summary

hotJanFebMarAprMayJunJulAugSepOctNovDecNowNow60%60%6%6%overcastprecipitation: 9.5 inprecipitation: 9.5 in0.1 in0.1 inmuggy: 100%muggy: 100%19%19%tourism score: 7.1tourism score: 7.12.62.6
Click on each chart for more information.

Temperature

The hot season lasts for 2.2 months, from March 1 to May 7, with an average daily high temperature above 93°F. The hottest day of the year is March 27, with an average high of 95°F and low of 76°F.

The cool season lasts for 4.7 months, from August 26 to January 15, with an average daily high temperature below 87°F. The coldest day of the year is January 1, with an average low of 64°F and high of 86°F.

Average High and Low Temperature

Average High and Low Temperature in Pho Si SuwanhotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 186°FJan 186°FMar 2795°FMar 2795°F64°F64°F76°F76°FMay 793°FMay 793°FAug 2687°FAug 2687°F72°F72°F78°F78°F77°F77°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in Pho Si SuwanJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcomfortablecomfortablewarmwarmhotcomfortablecomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Cuiabá, Brazil (11,129 miles away) and Chikwawa, Malawi (5,201 miles) are the far-away foreign places with temperatures most similar to Pho Si Suwan (view comparison).

Clouds

In Pho Si Suwan, 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 Pho Si Suwan begins around October 30 and lasts for 5.1 months, ending around April 2. On February 4, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 60% of the time, and overcast or mostly cloudy 40% of the time.

The cloudier part of the year begins around April 2 and lasts for 6.9 months, ending around October 30. On June 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 94% of the time, and clear, mostly clear, or partly cloudy 6% of the time.

Cloud Cover Categories

Cloud Cover Categories in Pho Si SuwanclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Feb 460%Feb 460%Jun 106%Jun 106%Oct 3033%Oct 3033%Apr 234%Apr 234%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

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

The wetter season lasts 5.6 months, from April 25 to October 13, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 62% on September 8.

The drier season lasts 6.4 months, from October 13 to April 25. The smallest chance of a wet day is 1% on December 17.

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 62% on September 8.

Daily Chance of Precipitation

Daily Chance of Precipitation in Pho Si SuwanwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Sep 862%Sep 862%Dec 171%Dec 171%Apr 2531%Apr 2531%Oct 1331%Oct 1331%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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. Pho Si Suwan experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.9 months, from February 24 to November 21, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 6, with an average total accumulation of 9.5 inches.

The rainless period of the year lasts for 3.1 months, from November 21 to February 24. The least rain falls around December 22, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall

Average Monthly Rainfall in Pho Si SuwanrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 inSep 69.5 inSep 69.5 inDec 220.1 inDec 220.1 inFeb 240.5 inFeb 240.5 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in Pho Si Suwan varies over the course of the year. In 2021, the shortest day is December 21, with 11 hours, 14 minutes of daylight; the longest day is June 21, with 13 hours, 2 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Pho Si SuwanJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2013 hr, 2 minJun 2113 hr, 2 minJun 2112 hr, 7 minSep 2312 hr, 7 minSep 2311 hr, 14 minDec 2111 hr, 14 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:32 AM on June 3, and the latest sunrise is 1 hour, 1 minute later at 6:33 AM on January 22. The earliest sunset is at 5:30 PM on November 22, and the latest sunset is 1 hour, 8 minutes later at 6:38 PM on July 8.

Daylight saving time (DST) is not observed in Pho Si Suwan during 2021.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Pho Si SuwanJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 35:32 AMJun 35:32 AM6:38 PMJul 86:38 PMJul 8Nov 225:30 PMNov 225:30 PM6:33 AMJan 226:33 AMJan 22daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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.

Moon Rise, Set & Phases

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

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.

Pho Si Suwan experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 10.0 months, from February 11 to December 10, during which time the comfort level is muggy, oppressive, or miserable at least 39% of the time. The muggiest day of the year is July 26, with muggy conditions 100% of the time.

The least muggy day of the year is January 7, with muggy conditions 19% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in Pho Si SuwanmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 719%Jan 719%100%Jul 26100%Jul 26Feb 1139%Feb 1139%Dec 1039%Dec 1039%NowNowmiserablemiserableoppressiveoppressivemuggymuggydrydrycomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 Pho Si Suwan experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.5 months, from November 2 to February 16, with average wind speeds of more than 7.8 miles per hour. The windiest day of the year is December 13, with an average hourly wind speed of 10.0 miles per hour.

The calmer time of year lasts for 8.5 months, from February 16 to November 2. The calmest day of the year is September 24, with an average hourly wind speed of 5.6 miles per hour.

Average Wind Speed

Average Wind Speed in Pho Si SuwanwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphDec 1310.0 mphDec 1310.0 mphSep 245.6 mphSep 245.6 mphNov 27.8 mphNov 27.8 mphFeb 167.8 mphFeb 167.8 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Pho Si Suwan varies throughout the year.

The wind is most often from the south for 4.4 months, from March 9 to July 21 and for 2.0 days, from September 20 to September 22, with a peak percentage of 58% on May 23. The wind is most often from the west for 2.0 months, from July 21 to September 20, with a peak percentage of 54% on August 11. The wind is most often from the north for 3.7 months, from September 22 to January 14, with a peak percentage of 56% on January 1.

Wind Direction

Wind Direction in Pho Si SuwanNESWNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestnorthsoutheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

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

Tourism Score

Tourism Score in Pho Si SuwanJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.17.12.62.62.82.8NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Pho Si Suwan for hot-weather activities are from early January to mid March and from late October to early December, with a peak score in the last week of February.

Beach/Pool Score

Beach/Pool Score in Pho Si Suwanbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.56.53.83.86.26.23.93.9NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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.

Growing Season

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 Pho Si Suwan 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

Time Spent in Various Temperature Bands and the Growing Season in Pho Si SuwanJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3NowNowcoolcomfortablewarmhotsweltering
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within 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

Growing Degree Days in Pho Si SuwanJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJan 590°FJan 590°FMar 81,800°FMar 81,800°FDec 3110,872°FDec 3110,872°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 2.8 months, from January 26 to April 19, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest day of the year is March 5, with an average of 5.9 kWh.

The darker period of the year lasts for 3.5 months, from June 6 to September 22, with an average daily incident shortwave energy per square meter below 4.5 kWh. The darkest day of the year is August 30, with an average of 4.1 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Pho Si SuwanbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMar 55.9 kWhMar 55.9 kWhAug 304.1 kWhAug 304.1 kWhJan 265.6 kWhJan 265.6 kWhApr 195.6 kWhApr 195.6 kWhJun 64.5 kWhJun 64.5 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Pho Si Suwan are 15.229 deg latitude, 104.077 deg longitude, and 456 ft elevation.

The topography within 2 miles of Pho Si Suwan is essentially flat, with a maximum elevation change of 95 feet and an average elevation above sea level of 450 feet. Within 10 miles is essentially flat (213 feet). Within 50 miles contains only modest variations in elevation (650 feet).

The area within 2 miles of Pho Si Suwan is covered by cropland (70%) and shrubs (30%), within 10 miles by cropland (61%) and shrubs (32%), and within 50 miles by cropland (67%) and shrubs (25%).

Data Sources

This report illustrates the typical weather in Pho Si Suwan, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Pho Si Suwan.

For each station, the records are corrected for the elevation difference between that station and Pho Si Suwan 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 Pho Si Suwan is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Pho Si Suwan and a given station.

The stations contributing to this reconstruction are: Ubon Ratchathani Airport (47%, 85 kilometers, east); Roi Et (35%, 104 kilometers, northwest); and Mukdahan (18%, 161 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports 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.

Disclaimer

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.