Nakhon Si Thammarat climate — normals and trends
Nakhon Si Thammarat (Thailand) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.5 °C and it receives 1,869 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 (27.6 °C on average) and the coldest is January (25.3 °C). Rainfall peaks in November.
Nakhon Si Thammarat averages 0 frost days, 126 hot days (≥ 30 °C) and 261 rainy days per year.
Nakhon Si Thammarat has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 35.1 °C (on 27 July 2002) and the coldest 19.7 °C (on 21 January 1940).
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
Nakhon Si ThammaratNakhon Si Thammarat
- coords
- 8.43°, 99.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.5°C
Average daily high
29.2°C
Average daily low
24.5°C
Annual rainfall
1,869mm
Sunshine / day
10.0h
Mean relative humidity
82%
Average peak wind
11.8km/h
Seasonal range
2.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
126 d/yr
Rainy days (≥ 1 mm)
261 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.6 °C
Average feels-like low
28.9 °C
Average peak gust
27.6 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.82 · 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
35.1 °C
27 July 2002
Coldest day
19.7 °C
21 January 1940
Wettest day
260 mm
27 October 1992
Windiest day
38.7 km/h
4 January 2019
Strongest gust
80.6 km/h
2 November 2010
Hottest feels-like
42.4 °C
15 April 2023
Coldest feels-like
20.0 °C
26 December 1999
Sunniest day
12.5 h
13 June 1942
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 | 28.1 °C | +0.6 °C | 81 mm | -39 mm |
| Feb | 28.9 °C | +0.5 °C | 162 mm | +90 mm |
| Mar | 29.7 °C | +0.2 °C | 88 mm | -7 mm |
| Apr | 30.6 °C | +0.1 °C | 211 mm | +95 mm |
| May | 30.7 °C | +0.1 °C | 213 mm | +80 mm |
| Jun | 30.7 °C | +0.1 °C | 89 mm | -2 mm |
| Jul | 31.3 °C | +1.1 °C | 73 mm | -31 mm |
| Aug | 30.9 °C | +0.9 °C | 107 mm | -5 mm |
| Sep | 30.5 °C | +1.0 °C | 192 mm | +35 mm |
| Oct | 29.3 °C | +0.7 °C | 331 mm | +63 mm |
| Nov | 28.5 °C | +0.8 °C | 548 mm | +194 mm |
| Dec | 28.3 °C | +1.0 °C | 246 mm | -2 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 Nakhon Si Thammarat?
Nakhon Si Thammarat has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.5 °C and it receives 1,869 mm of precipitation per year.
What is the hottest day ever recorded in Nakhon Si Thammarat?
The hottest day measured in Nakhon Si Thammarat between 1940 and 2025 was 27 July 2002, reaching 35.1 °C.
What is the coldest day in Nakhon Si Thammarat?
The coldest day measured in Nakhon Si Thammarat between 1940 and 2025 was 21 January 1940, at 19.7 °C.
Does it snow in Nakhon Si Thammarat?
Almost never: Nakhon Si Thammarat sees virtually no snow, with about 0 frost days per year.
Has the climate of Nakhon Si Thammarat warmed?
Yes: Nakhon Si Thammarat warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nakhon Si Thammarat?
The wettest day measured in Nakhon Si Thammarat between 1940 and 2025 was 27 October 1992, with 260 mm of rain in 24 hours.
What was the windiest day in Nakhon Si Thammarat?
The windiest day measured in Nakhon Si Thammarat between 1940 and 2025 was 4 January 2019, with winds reaching 38.7 km/h.
What is the warmest month in Nakhon Si Thammarat?
The warmest month in Nakhon Si Thammarat is April (27.6 °C on average); the coldest is January (25.3 °C).
How much does it rain in Nakhon Si Thammarat?
Nakhon Si Thammarat receives on average 1,869 mm of precipitation per year, spread over about 261 rainy days.
Is it sunny in Nakhon Si Thammarat?
Nakhon Si Thammarat gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Nakhon Si Thammarat?
Yes: Nakhon Si Thammarat has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nakhon Si Thammarat?
In Nakhon Si Thammarat, between 1940 and 2025, the highest apparent temperature reached 42.4 °C on 15 April 2023, and the lowest was 20.0 °C on 26 December 1999.
Compare Nakhon Si Thammarat with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nakhon Si Thammarat