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Climate and Average Weather Year Round in Sam Ngam Thailand

In Sam Ngam, the wet season is oppressive and overcast, the dry season is muggy and partly cloudy, and it is hot year round. Over the course of the year, the temperature typically varies from 66°F to 98°F and is rarely below 60°F or above 103°F.

Based on the beach/pool score, the best times of year to visit Sam Ngam for hot-weather activities are from early January to mid March and from mid November to late December.

Climate in Sam Ngam

hotswelteringhotJanFebMarAprMayJunJulAugSepOctNovDecNowNow65%65%7%7%overcastclearprecipitation: 7.8 inprecipitation: 7.8 in0.1 in0.1 inmuggy: 100%muggy: 100%31%31%beach/pool score: 7.1beach/pool score: 7.13.43.4
Sam Ngam weather by month. Click on each chart for more information.

The hot season lasts for 1.7 months, from March 17 to May 6, with an average daily high temperature above 96°F. The hottest month of the year in Sam Ngam is April, with an average high of 98°F and low of 80°F.

The cool season lasts for 5.9 months, from July 27 to January 24, with an average daily high temperature below 90°F. The coldest month of the year in Sam Ngam is December, with an average low of 67°F and high of 88°F.

Average High and Low Temperature in Sam Ngam

Average High and Low Temperature in Sam NgamhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 288°FJan 288°FApr 1398°FApr 1398°F66°F66°F80°F80°FJul 2790°FJul 2790°F77°F77°F78°F78°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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 89°F93°F96°F98°F95°F92°F90°F89°F89°F89°F89°F88°F
Temp. 77°F82°F86°F88°F86°F85°F84°F83°F83°F82°F80°F77°F
Low 67°F72°F77°F80°F80°F79°F78°F78°F78°F76°F72°F67°F

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 in Sam Ngam

Average Hourly Temperature in Sam NgamJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowcomfortablecomfortablewarmwarmhotswelteringcomfortablecomfortable
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.

Jalapa, Mexico (9,930 miles away); Santa Teresa, Venezuela (10,394 miles); and Lucas, Brazil (10,868 miles) are the far-away foreign places with temperatures most similar to Sam Ngam (view comparison).

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In Sam Ngam, 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 Sam Ngam begins around October 30 and lasts for 5.4 months, ending around April 11.

The clearest month of the year in Sam Ngam is February, during which on average the sky is clear, mostly clear, or partly cloudy 64% of the time.

The cloudier part of the year begins around April 11 and lasts for 6.6 months, ending around October 30.

The cloudiest month of the year in Sam Ngam is June, during which on average the sky is overcast or mostly cloudy 92% of the time.

Cloud Cover Categories in Sam Ngam

Cloud Cover Categories in Sam NgamclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Feb 1065%Feb 1065%Jun 117%Jun 117%Oct 3036%Oct 3036%Apr 1136%Apr 1136%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.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 37%36%47%66%87%92%91%91%86%73%54%40%
Clearer 63%64%53%34%13%8%9%9%14%27%46%60%

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

The wetter season lasts 5.8 months, from April 28 to October 21, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Sam Ngam is September, with an average of 17.8 days with at least 0.04 inches of precipitation.

The drier season lasts 6.2 months, from October 21 to April 28. The month with the fewest wet days in Sam Ngam is January, with an average of 0.6 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 Sam Ngam is September, with an average of 17.8 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.

Daily Chance of Precipitation in Sam Ngam

Daily Chance of Precipitation in Sam NgamwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Sep 761%Sep 761%Dec 191%Dec 191%Apr 2831%Apr 2831%Oct 2131%Oct 2131%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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 0.6d1.3d3.3d6.5d13.9d14.8d15.3d17.4d17.8d11.8d3.1d0.6d

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. Sam Ngam experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.0 months, from February 25 to November 27, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Sam Ngam is September, with an average rainfall of 7.8 inches.

The rainless period of the year lasts for 3.0 months, from November 27 to February 25. The month with the least rain in Sam Ngam is January, with an average rainfall of 0.1 inches.

Average Monthly Rainfall in Sam Ngam

Average Monthly Rainfall in Sam NgamrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 inSep 127.8 inSep 127.8 inJan 140.1 inJan 140.1 inMay 265.5 inMay 265.5 inFeb 250.5 inFeb 250.5 inNov 270.5 inNov 270.5 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 snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 0.1″0.3″0.9″2.1″5.2″4.9″4.8″6.4″7.8″4.4″1.1″0.2″

The length of the day in Sam Ngam varies over the course of the year. In 2024, the shortest day is December 21, with 11 hours, 9 minutes of daylight; the longest day is June 21, with 13 hours, 7 minutes of daylight.

Hours of Daylight and Twilight in Sam Ngam

Hours of Daylight and Twilight in Sam NgamJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2013 hr, 7 minJun 2113 hr, 7 minJun 2112 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 9 minDec 2111 hr, 9 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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 11.3h11.6h12.1h12.5h12.9h13.1h13.0h12.7h12.2h11.8h11.4h11.2h

The earliest sunrise is at 5:45 AM on June 3, and the latest sunrise is 1 hour, 6 minutes later at 6:51 AM on January 21. The earliest sunset is at 5:43 PM on November 22, and the latest sunset is 1 hour, 12 minutes later at 6:56 PM on July 7.

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

Sunrise & Sunset with Twilight in Sam Ngam

Sunrise & Sunset with Twilight in Sam NgamJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 35:45 AMJun 35:45 AM6:56 PMJul 76:56 PMJul 7Nov 225:43 PMNov 225:43 PM6:51 AMJan 216:51 AMJan 21daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Sam Ngam

Solar Elevation and Azimuth in Sam NgamJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00001010101020202020303030304040404050505050606060707080000010101010202020203030303040404040505050506060607070808090NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

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.

Moon Rise, Set & Phases in Sam Ngam

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.

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.

Sam Ngam experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 10 months, from February 7 to December 10, during which time the comfort level is muggy, oppressive, or miserable at least 48% of the time.

The month with the fewest muggy days in Sam Ngam is January, with 10.8 days that are muggy or worse.

Humidity Comfort Levels in Sam Ngam

Humidity Comfort Levels in Sam NgammuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 431%Jan 431%100%Jul 23100%Jul 23Feb 748%Feb 748%Dec 1048%Dec 1048%NowNowmiserablemiserableoppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortable
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 10.8d16.0d25.3d28.9d30.9d30.0d31.0d31.0d30.0d30.4d24.5d13.4d

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 Sam Ngam experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.3 months, from January 18 to August 28, with average wind speeds of more than 4.8 miles per hour. The windiest month of the year in Sam Ngam is June, with an average hourly wind speed of 5.6 miles per hour.

The calmer time of year lasts for 4.7 months, from August 28 to January 18. The calmest month of the year in Sam Ngam is October, with an average hourly wind speed of 4.0 miles per hour.

Average Wind Speed in Sam Ngam

Average Wind Speed in Sam NgamwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mphJun 225.8 mphJun 225.8 mphSep 293.8 mphSep 293.8 mphJan 184.8 mphJan 184.8 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 4.85.05.35.25.15.65.65.24.14.04.75.2

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

The wind is most often from the south for 5.9 months, from February 5 to August 1 and for 4.0 weeks, from August 31 to September 28, with a peak percentage of 67% on April 3. The wind is most often from the west for 4.3 weeks, from August 1 to August 31, with a peak percentage of 50% on August 16. The wind is most often from the east for 4.2 months, from September 28 to February 5, with a peak percentage of 56% on January 1.

Wind Direction in Sam Ngam

Wind Direction in Sam NgamESWSEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
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).

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

Tourism Score in Sam Ngam

Tourism Score in Sam NgamJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.07.02.22.22.52.5NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism 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 Sam Ngam for hot-weather activities are from early January to mid March and from mid November to late December, with a peak score in the second week of February.

Beach/Pool Score in Sam Ngam

Beach/Pool Score in Sam Ngambest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.17.13.43.46.66.66.46.43.73.7NowNowtemperaturetemperature precipitationprecipitationbeach/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.

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 Sam Ngam 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 in Sam Ngam

Time Spent in Various Temperature Bands and the Growing Season in Sam NgamJanFebMarAprMayJunJulAugSepOctNovDec0%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 2100%Jul 2NowNowcomfortablewarmhotswelteringcool
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 in Sam Ngam

Growing Degree Days in Sam NgamJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJan 490°FJan 490°FDec 3111,362°FDec 3111,362°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 2.2 months, from February 13 to April 19, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Sam Ngam is March, with an average of 6.1 kWh.

The darker period of the year lasts for 2.6 months, from July 4 to September 23, with an average daily incident shortwave energy per square meter below 4.7 kWh. The darkest month of the year in Sam Ngam is August, with an average of 4.5 kWh.

Average Daily Incident Shortwave Solar Energy in Sam Ngam

Average Daily Incident Shortwave Solar Energy in Sam NgambrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMar 266.1 kWhMar 266.1 kWhAug 304.4 kWhAug 304.4 kWhFeb 135.8 kWhFeb 135.8 kWhJul 44.7 kWhJul 44.7 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 5.35.86.15.85.04.84.74.54.65.15.15.1

For the purposes of this report, the geographical coordinates of Sam Ngam are 16.507 deg latitude, 100.205 deg longitude, and 144 ft elevation.

The topography within 2 miles of Sam Ngam is essentially flat, with a maximum elevation change of 46 feet and an average elevation above sea level of 129 feet. Within 10 miles is essentially flat (105 feet). Within 50 miles contains only modest variations in elevation (3,950 feet).

The area within 2 miles of Sam Ngam is covered by cropland (100%), within 10 miles by cropland (99%), and within 50 miles by cropland (84%) and trees (12%).

This report illustrates the typical weather in Sam Ngam, 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 Sam Ngam.

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

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Sam Ngam and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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 © OpenStreetMap contributors.

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.

Please review our full terms contained on our Terms of Service page.