Rayong Temperature by Month

The average annual maximum temperature in Rayong, Rayong Province, Thailand is 32°C (90°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Rayong compares to cities worldwide.

Year-round, Rayong experiences a consistently very warm climate. Maximum daytime temperatures range from a very warm 33°C (91°F) in April to a very warm 31°C (88°F) in the coolest month, September. Nighttime temperatures range from 27°C (81°F) in April to 24°C (75°F) in September.

The chart below illustrates the average maximum day and minimum night temperatures in Rayong by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. April, the city's warmest month, gets 210 hours of sunshine.

The chart below shows the average temperature throughout the year:

Rayong's average annual maximum temperature is 32°C (90°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Rayong, September is the coolest month, with average highs of 31°C (88°F) and humidity around 81%, considered very high. In April, the warmest month, temperatures average 33°C (91°F) with 77% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Rayong's weather, including monthly rainfall, sunshine hours, and humidity, visit our Rayong climate page.