Rayong climate — normals and trends
Rayong (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 1,759 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (28.1 °C on average) and the coldest is December (25.6 °C). Rainfall peaks in September.
Rayong averages 0 frost days, 264 hot days (≥ 30 °C) and 214 rainy days per year.
Rayong has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.4 °C (on 23 April 1990) and the coldest 13.4 °C (on 12 January 1955).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
RayongRayong
- coords
- 12.68°, 101.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.1°C
Average daily high
30.7°C
Average daily low
24.4°C
Annual rainfall
1,759mm
Sunshine / day
9.9h
Mean relative humidity
80%
Average peak wind
14.1km/h
Seasonal range
2.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
264 d/yr
Rainy days (≥ 1 mm)
214 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.9 °C
Average feels-like low
28.3 °C
Average peak gust
31.5 km/h
Tropical nights (≥ 20 °C)
351 d/yr
Solar radiation
18.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.84 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.4 °C
23 April 1990
Coldest day
13.4 °C
12 January 1955
Wettest day
95 mm
22 July 2023
Windiest day
33.2 km/h
5 November 2017
Strongest gust
68.8 km/h
19 August 1990
Hottest feels-like
45.2 °C
12 May 2024
Coldest feels-like
9.3 °C
12 January 1955
Sunniest day
12.7 h
13 July 1941
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 31.3 °C | +0.6 °C | 1 mm | -26 mm |
| Feb | 31.9 °C | +1.0 °C | 45 mm | 0 mm |
| Mar | 31.6 °C | +0.3 °C | 74 mm | -5 mm |
| Apr | 32.1 °C | +0.4 °C | 136 mm | +10 mm |
| May | 31.2 °C | 0.0 °C | 370 mm | +142 mm |
| Jun | 31.7 °C | +1.0 °C | 135 mm | -69 mm |
| Jul | 31.2 °C | +0.8 °C | 181 mm | -21 mm |
| Aug | 31.4 °C | +1.0 °C | 184 mm | -17 mm |
| Sep | 30.8 °C | +0.7 °C | 200 mm | -98 mm |
| Oct | 30.9 °C | +0.6 °C | 257 mm | +0 mm |
| Nov | 29.9 °C | -0.5 °C | 139 mm | +63 mm |
| Dec | 31.7 °C | +1.4 °C | 9 mm | -8 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Rayong?
Rayong has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 1,759 mm of precipitation per year.
What is the hottest day ever recorded in Rayong?
The hottest day measured in Rayong between 1940 and 2025 was 23 April 1990, reaching 36.4 °C.
What is the coldest day in Rayong?
The coldest day measured in Rayong between 1940 and 2025 was 12 January 1955, at 13.4 °C.
Does it snow in Rayong?
Almost never: Rayong sees virtually no snow, with about 0 frost days per year.
Has the climate of Rayong warmed?
Yes: Rayong warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rayong?
The wettest day measured in Rayong between 1940 and 2025 was 22 July 2023, with 95 mm of rain in 24 hours.
What was the windiest day in Rayong?
The windiest day measured in Rayong between 1940 and 2025 was 5 November 2017, with winds reaching 33.2 km/h.
What is the warmest month in Rayong?
The warmest month in Rayong is April (28.1 °C on average); the coldest is December (25.6 °C).
How much does it rain in Rayong?
Rayong receives on average 1,759 mm of precipitation per year, spread over about 214 rainy days.
Is it sunny in Rayong?
Rayong gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Rayong?
Yes: Rayong has on average 351 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rayong?
In Rayong, between 1940 and 2025, the highest apparent temperature reached 45.2 °C on 12 May 2024, and the lowest was 9.3 °C on 12 January 1955.
Compare Rayong with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rayong