Rayong Province Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Rayong Province, Thailand in September.

Thinking about venturing to Rayong Province, Thailand this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Rayong Province in September

Rayong Province, Thailand is a region in Thailand. September in Rayong Province generally has very warm temperatures, with heavy precipitation.

Temperatures

You can expect very warm maximum daytime temperatures of around 30°C (86°F) and nighttime temperatures around 26°C (79°F) in Koh Samet. The temperatures cited for both day and night represent usual averages, but it's possible some days could be hotter. It's advisable to dress accordingly to handle the heat.

To learn more about the conditions in specific areas of Rayong Province, Thailand, check out the map below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Ban Chang with an average of 230 mm (9.1 in) to heavy rainfall in Mae Pim with 354 mm (14 in). Going by our weather data, it is the wettest month of the year in Koh Samet.

Average sunshine

Sunshine is moderately available across various locations. In Koh Samet, you can expect around 110 hours of sunlight in September, which gives a pleasant combination of sun and shade. For those who want maximum sunshine, our weather planner can point you toward the sunniest places on Earth.

Explore Rayong Province by month

Pick a month to see the average temperature, rainfall and sunshine in Rayong Province — and find the best time to visit. (based on Koh Samet)

Best Places to Visit in Rayong Province in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Rayong Province.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Rayong Province

What is the weather like in September for some of the most popular destinations in Rayong Province, Thailand?

Temperature range in Rayong Province (September)

Precipitation variation in Rayong Province (September)

Koh Samet

In September Koh Samet generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
115 hours
110 hours
146 hours
Monthly rainfall
233 mm (9.2 in)
322 mm (13 in)
239 mm (9.4 in)
Monthly rainy days
16 days
19 days
17 days
Weather conditions

Rayong

In September Rayong generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
32°C (90°F)
31°C (88°F)
32°C (90°F)
Min temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Monthly sun hours
115 hours
110 hours
146 hours
Monthly rainfall
199 mm (7.8 in)
308 mm (12 in)
250 mm (9.8 in)
Monthly rainy days
15 days
18 days
17 days
Weather conditions

Ban Chang

In September Ban Chang generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 27°C (81°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
33°C (91°F)
32°C (90°F)
32°C (90°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly sun hours
115 hours
110 hours
146 hours
Monthly rainfall
132 mm (5.2 in)
230 mm (9.1 in)
235 mm (9.3 in)
Monthly rainy days
14 days
17 days
17 days
Weather conditions

Mae Pim

In September Mae Pim generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
26°C (79°F)
26°C (79°F)
25°C (77°F)
Monthly sun hours
58 hours
55 hours
148 hours
Monthly rainfall
283 mm (11 in)
354 mm (14 in)
236 mm (9.3 in)
Monthly rainy days
19 days
20 days
17 days
Weather conditions

Ban Phe

In September Ban Phe generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
27°C (81°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
115 hours
110 hours
146 hours
Monthly rainfall
222 mm (8.7 in)
319 mm (13 in)
239 mm (9.4 in)
Monthly rainy days
16 days
19 days
17 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Rayong Province, in Thailand.

Popular cities in September

Day & night temperatures, rainfall and average weather in Rayong Province in September.

City Weather Day temp Night temp Rainfall
Koh Samet 30°C (86°F) 26°C (79°F) 322 mm (13 in)
Rayong 31°C (88°F) 26°C (79°F) 308 mm (12 in)
Ban Chang 32°C (90°F) 27°C (81°F) 230 mm (9.1 in)
Mae Pim 31°C (88°F) 26°C (79°F) 354 mm (14 in)
Ban Phe 31°C (88°F) 26°C (79°F) 319 mm (13 in)
Klaeng 31°C (88°F) 26°C (79°F) 328 mm (13 in)

Rayong Province weather in September: frequently asked questions

What is the weather like in Rayong Province, Thailand in September?

September in Rayong Province, Thailand brings poor weather. In Koh Samet, daytime temperatures are typically around 30°C (86°F) and nighttime lows hover near 26°C (79°F).

What is the average temperature in Rayong Province, Thailand in September?

Average temperatures in Rayong Province, Thailand during September range from a nighttime low near 26°C (79°F) to a daytime high around 30°C (86°F) in Koh Samet.

Does Rayong Province, Thailand get a lot of rain in September?

Yes. September brings heavy rainfall to Rayong Province, Thailand, with Koh Samet averaging around 322 mm (13 in). Expect frequent showers and pack accordingly.

Is September a Good Time to Visit Rayong Province, Thailand?

Given the typically poor weather conditions in Koh Samet, September may not be the ideal time to visit Rayong Province, Thailand.

Generally speaking, the best visiting conditions can be found in January, February and December offering mostly pleasant weather in Koh Samet. On the other hand, the months of May, June, July, August, September and October tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Rayong Province.

Weather and climate has detailed information for every country in the world. Are you going to Thailand? Get detailed historical weather averages for many cities in Thailand.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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