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Average Weather in Prachuap Khiri Khan Thailand

In Prachuap Khiri Khan, the wet season is overcast, the dry season is partly cloudy, and it is hot and oppressive year round. Over the course of the year, the temperature typically varies from 69°F to 92°F and is rarely below 64°F or above 97°F.

Based on the beach/pool score, the best time of year to visit Prachuap Khiri Khan for hot-weather activities is from late November to mid March.

Climate Summary

hotJanFebMarAprMayJunJulAugSepOctNovDec53%53%5%5%overcastclearprecipitation: 8.2 inprecipitation: 8.2 in0.5 in0.5 inmuggy: 100%muggy: 100%66%66%beach/pool score: 6.8beach/pool score: 6.83.93.9
Click on each chart for more information.

Temperature

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

Average High and Low Temperature

Average High and Low Temperature in Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°F110°FJan 586°FJan 586°FApr 2092°FApr 2092°F69°F69°F78°F78°FOct 2687°FOct 2687°F79°F79°F75°F75°FLowHigh
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 Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcomfortablewarmwarmhotcomfortable
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.

El Espinal, Mexico (10,281 miles away) is the far-away foreign place with temperatures most similar to Prachuap Khiri Khan (view comparison).

Clouds

In Prachuap Khiri Khan, 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 in Prachuap Khiri Khan begins around November 20 and lasts for 4.2 months, ending around March 27. On February 9, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 53% of the time, and overcast or mostly cloudy 47% of the time.

The cloudier part of the year begins around March 27 and lasts for 7.8 months, ending around November 20. On May 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 95% of the time, and clear, mostly clear, or partly cloudy 5% of the time.

Cloud Cover Categories

Cloud Cover Categories in Prachuap Khiri KhanclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Feb 953%Feb 953%May 285%May 285%Nov 2029%Nov 2029%Mar 2729%Mar 2729%clearmostly 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 Prachuap Khiri Khan varies very significantly throughout the year.

The wetter season lasts 6.3 months, from May 4 to November 15, with a greater than 38% chance of a given day being a wet day. The chance of a wet day peaks at 69% on September 25.

The drier season lasts 5.7 months, from November 15 to May 4. The smallest chance of a wet day is 7% on December 30.

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 69% on September 25.

Daily Chance of Precipitation

Daily Chance of Precipitation in Prachuap Khiri KhanwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Sep 2569%Sep 2569%Dec 307%Dec 307%May 438%May 438%Nov 1538%Nov 1538%rain
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. Prachuap Khiri Khan experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Prachuap Khiri Khan. The most rain falls during the 31 days centered around October 13, with an average total accumulation of 8.2 inches.

The least rain falls around January 4, with an average total accumulation of 0.5 inches.

Average Monthly Rainfall

Average Monthly Rainfall in Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec0 in2 in4 in6 in8 in10 in12 in14 inOct 138.2 inOct 138.2 inJan 40.5 inJan 40.5 inJul 156.4 inJul 156.4 in
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 Prachuap Khiri Khan does not vary substantially over the course of the year, staying within 49 minutes of 12 hours throughout. In 2018, the shortest day is December 22, with 11 hours, 26 minutes of daylight; the longest day is June 21, with 12 hours, 49 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2012 hr, 49 minJun 2112 hr, 49 minJun 2112 hr, 7 minSep 2312 hr, 7 minSep 2311 hr, 26 minDec 2211 hr, 26 minDec 22nightnightday
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 5:55 AM on June 1, and the latest sunrise is 51 minutes later at 6:46 AM on January 26. The earliest sunset is at 5:52 PM on November 19, and the latest sunset is 57 minutes later at 6:49 PM on July 11.

Daylight saving time (DST) is not observed in Prachuap Khiri Khan during 2018.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 15:55 AMJun 15:55 AM6:49 PMJul 116:49 PMJul 11Nov 195:52 PMNov 195:52 PM6:46 AMJan 266:46 AMJan 26daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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.

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.

Prachuap Khiri Khan experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 11 months, from January 12 to December 8, during which time the comfort level is muggy, oppressive, or miserable at least 74% of the time. The muggiest day of the year is July 13, with muggy conditions 100% of the time.

The least muggy day of the year is December 30, with muggy conditions 66% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in Prachuap Khiri KhanmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 3066%Dec 3066%100%Jul 13100%Jul 13Jan 1274%Jan 1274%miserablemiserableoppressiveoppressivehumidhumidmuggymuggycomfortablecomfortable
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 Prachuap Khiri Khan experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.5 months, from May 27 to September 11, with average wind speeds of more than 7.3 miles per hour. The windiest day of the year is August 6, with an average hourly wind speed of 9.0 miles per hour.

The calmer time of year lasts for 8.5 months, from September 11 to May 27. The calmest day of the year is February 3, with an average hourly wind speed of 5.6 miles per hour.

Average Wind Speed

Average Wind Speed in Prachuap Khiri KhanwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mphAug 69.0 mphAug 69.0 mphFeb 35.6 mphFeb 35.6 mphMay 277.3 mphMay 277.3 mph
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 Prachuap Khiri Khan varies throughout the year.

The wind is most often from the south for 3.3 months, from January 30 to May 9, with a peak percentage of 66% on March 9. The wind is most often from the west for 5.2 months, from May 9 to October 15, with a peak percentage of 90% on August 14. The wind is most often from the north for 1.8 months, from November 6 to December 30, with a peak percentage of 55% on December 6.

Wind Direction

Wind Direction in Prachuap Khiri KhanESWENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsouthnortheast
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).

Water Temperature

Prachuap Khiri Khan 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 2.0 months, from April 12 to June 11, with an average temperature above 85°F. The day of the year with the warmest water is May 7, with an average temperature of 86°F.

The time of year with cooler water lasts for 2.1 months, from December 11 to February 14, with an average temperature below 82°F. The day of the year with the coolest water is January 5, with an average temperature of 81°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Prachuap Khiri Khan 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 Prachuap Khiri Khan for general outdoor tourist activities is from early December to early February, with a peak score in the first week of January.

Tourism Score

Tourism Score in Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec02468106.66.62.52.5 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 time of year to visit Prachuap Khiri Khan for hot-weather activities is from late November to mid March, with a peak score in the second week of February.

Beach/Pool Score

Beach/Pool Score in Prachuap Khiri Khanbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.86.83.93.94.14.1 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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 Prachuap Khiri Khan 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 Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec0%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 3comfortablewarmhotsweltering
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 Prachuap Khiri KhanJanFebMarAprMayJunJulAugSepOctNovDec0°F2,000°F4,000°F6,000°F8,000°F10,000°FJan 490°FJan 490°FDec 3111,153°FDec 3111,153°F
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 2.3 months, from January 24 to April 3, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is March 4, with an average of 6.3 kWh.

The darker period of the year lasts for 5.5 months, from May 15 to October 30, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest day of the year is October 5, with an average of 3.9 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Prachuap Khiri KhanbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhMar 46.3 kWhMar 46.3 kWhOct 53.9 kWhOct 53.9 kWhMay 154.4 kWhMay 154.4 kWh
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 Prachuap Khiri Khan are 11.821 deg latitude, 99.784 deg longitude, and 36 ft elevation.

The topography within 2 miles of Prachuap Khiri Khan contains only modest variations in elevation, with a maximum elevation change of 217 feet and an average elevation above sea level of 38 feet. Within 10 miles contains only modest variations in elevation (2,087 feet). Within 50 miles contains large variations in elevation (4,341 feet).

The area within 2 miles of Prachuap Khiri Khan is covered by cropland (62%) and shrubs (35%), within 10 miles by cropland (50%) and water (39%), and within 50 miles by water (52%) and trees (29%).

Data Sources

This report illustrates the typical weather in Prachuap Khiri Khan, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Prachuap Khiri Khan.

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

The stations contributing to this reconstruction are: Prachuap Khirikhan (99%, 4.3 kilometers, southeast) and Hua Hin Airport (1.0%, 93 kilometers, north).

Other Data

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.

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.