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Average Weather in March in Rayong Thailand

In Rayong, the month of March is characterized by essentially constant daily high temperatures, with daily highs around 90°F throughout the month, rarely exceeding 94°F or dropping below 87°F.

Daily low temperatures increase by 3°F, from 77°F to 80°F, rarely falling below 73°F or exceeding 83°F.

For reference, on April 15, the hottest day of the year, temperatures in Rayong typically range from 81°F to 92°F, while on January 1, the coldest day of the year, they range from 70°F to 89°F.

Average High and Low Temperature in March

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 hourly average temperatures for the quarter of the year centered on March. The horizontal axis is the day, 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 March

Average Hourly Temperature in March in Rayong12 AM4 AM8 AM12 PM4 PM8 PM12 AM181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131FebAprwarmhotcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

The month of March in Rayong experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 51% to 74%.

The clearest day of the month is March 1, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on May 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 94%, while on February 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 55%.

Cloud Cover in March

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Rayong, the chance of a wet day over the course of March is very rapidly increasing, starting the month at 11% and ending it at 20%.

For reference, the year's highest daily chance of a wet day is 81% on September 19, and its lowest chance is 2% on December 23.

Probability of Precipitation in March

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 month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during March in Rayong is increasing, starting the month at 0.8 inches, when it rarely exceeds 1.7 inches or falls below 0.1 inches, and ending the month at 1.3 inches, when it rarely exceeds 2.9 inches or falls below 0.2 inches.

Average Monthly Rainfall in March

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

Over the course of March in Rayong, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 21 minutes, implying an average daily increase of 42 seconds, and weekly increase of 4 minutes, 56 seconds.

The shortest day of the month is March 1, with 11 hours, 53 minutes of daylight and the longest day is March 31, with 12 hours, 14 minutes of daylight.

Hours of Daylight and Twilight in March

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 latest sunrise of the month in Rayong is 6:30 AM on March 1 and the earliest sunrise is 19 minutes earlier at 6:12 AM on March 31.

The earliest sunset is 6:23 PM on March 1 and the latest sunset is 2 minutes, 25 seconds later at 6:26 PM on March 31.

Daylight saving time is not observed in Rayong during 2017.

For reference, on June 21, the longest day of the year, the Sun rises at 5:50 AM and sets 12 hours, 52 minutes later, at 6:42 PM, while on December 21, the shortest day of the year, it rises at 6:31 AM and sets 11 hours, 23 minutes later, at 5:54 PM.

Sunrise & Sunset with Twilight in March

The solar day over the course of March. 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.

The chance that a given day will be muggy in Rayong is gradually increasing during March, rising from 95% to 99% over the course of the month.

For reference, on May 1, the muggiest day of the year, there are muggy conditions 100% of the time, while on December 29, the least muggy day of the year, there are muggy conditions 59% of the time.

Humidity Comfort Levels in March

Humidity Comfort Levels in March in Rayong0%10%20%30%40%50%60%70%80%90%100%181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131FebAprMar 195%Mar 195%Mar 3199%Mar 3199%Mar 1197%Mar 1197%Mar 2198%Mar 2198%miserablemiserableoppressiveoppressivemuggymuggyhumidhumid
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

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 Rayong is essentially constant during March, remaining within 0.1 miles per hour of 4.7 miles per hour throughout.

For reference, on August 6, the windiest day of the year, the daily average wind speed is 6.4 miles per hour, while on October 8, the calmest day of the year, the daily average wind speed is 3.8 miles per hour.

The highest daily average wind speed during March is 4.8 miles per hour on March 14.

Average Wind Speed in March

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Rayong throughout March is predominantly from the south, with a peak proportion of 87% on March 27.

Wind Direction in March

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 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

Rayong 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 surface water temperature in Rayong is gradually increasing during March, rising by 2°F, from 83°F to 85°F, over the course of the month.

Average Water Temperature in March

The daily average water temperature (purple line), 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 in Rayong is gradually decreasing during March, falling by 0.6 kWh, from 6.0 kWh to 5.4 kWh, over the course of the month.

The highest average daily incident shortwave solar energy during March is 6.0 kWh on March 4.

Average Daily Incident Shortwave Solar Energy in March

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 Rayong are 12.681 deg latitude, 101.258 deg longitude, and 23 ft elevation.

The topography within 2 miles of Rayong contains only modest variations in elevation, with a maximum elevation change of 112 feet and an average elevation above sea level of 24 feet. Within 10 miles contains only modest variations in elevation (1,027 feet). Within 50 miles contains very significant variations in elevation (3,488 feet).

The area within 2 miles of Rayong is covered by cropland (43%), artificial surfaces (30%), bare soil (14%), and shrubs (11%), within 10 miles by cropland (55%) and water (37%), and within 50 miles by water (57%) and cropland (36%).

Data Sources

This report illustrates the typical weather in Rayong year round, 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 Rayong.

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

The stations contributing to this reconstruction are: U-Tapao International Airport (85%, 30 kilometers, west) and Chanthaburi (15%, 94 kilometers, east).

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.