Thoen climate — normals and trends
Thoen (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.6 °C and it receives 1,341 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 (29.0 °C on average) and the coldest is December (21.6 °C). Rainfall peaks in September.
Thoen averages 0 frost days, 235 hot days (≥ 30 °C) and 163 rainy days per year.
Thoen has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The hottest day of the period reached 43.1 °C (on 11 May 2016) and the coldest 5.5 °C (on 31 December 1975).
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
ThoenLampang
- coords
- 17.61°, 99.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.6°C
Average daily high
31.4°C
Average daily low
21.1°C
Annual rainfall
1,341mm
Sunshine / day
9.7h
Mean relative humidity
75%
Average peak wind
9.0km/h
Seasonal range
7.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
235 d/yr
Rainy days (≥ 1 mm)
163 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.4 °C
Average feels-like low
24.2 °C
Average peak gust
27.8 km/h
Tropical nights (≥ 20 °C)
253 d/yr
Solar radiation
17.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.73 · 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
43.1 °C
11 May 2016
Coldest day
5.5 °C
31 December 1975
Wettest day
174 mm
17 May 2017
Windiest day
21.3 km/h
8 April 1985
Strongest gust
72.4 km/h
8 May 1975
Hottest feels-like
46.6 °C
11 May 2016
Coldest feels-like
2.7 °C
25 December 1999
Sunniest day
13.0 h
26 June 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 | 29.1 °C | -0.5 °C | 0 mm | -13 mm |
| Feb | 32.8 °C | +0.1 °C | 10 mm | +1 mm |
| Mar | 36.0 °C | +0.7 °C | 2 mm | -27 mm |
| Apr | 35.7 °C | -0.4 °C | 63 mm | +2 mm |
| May | 33.2 °C | -0.2 °C | 244 mm | +44 mm |
| Jun | 32.1 °C | +0.7 °C | 177 mm | +7 mm |
| Jul | 30.5 °C | -0.3 °C | 262 mm | +91 mm |
| Aug | 31.7 °C | +1.3 °C | 172 mm | -45 mm |
| Sep | 31.1 °C | +0.8 °C | 230 mm | -25 mm |
| Oct | 31.0 °C | +1.2 °C | 110 mm | -52 mm |
| Nov | 27.8 °C | -1.3 °C | 157 mm | +113 mm |
| Dec | 28.8 °C | +0.6 °C | 10 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 Thoen?
Thoen has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.6 °C and it receives 1,341 mm of precipitation per year.
What is the hottest day ever recorded in Thoen?
The hottest day measured in Thoen between 1940 and 2025 was 11 May 2016, reaching 43.1 °C.
What is the coldest day in Thoen?
The coldest day measured in Thoen between 1940 and 2025 was 31 December 1975, at 5.5 °C.
Does it snow in Thoen?
Almost never: Thoen sees virtually no snow, with about 0 frost days per year.
Has the climate of Thoen warmed?
Yes: Thoen warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Thoen?
The wettest day measured in Thoen between 1940 and 2025 was 17 May 2017, with 174 mm of rain in 24 hours.
What was the windiest day in Thoen?
The windiest day measured in Thoen between 1940 and 2025 was 8 April 1985, with winds reaching 21.3 km/h.
What is the warmest month in Thoen?
The warmest month in Thoen is April (29.0 °C on average); the coldest is December (21.6 °C).
How much does it rain in Thoen?
Thoen receives on average 1,341 mm of precipitation per year, spread over about 163 rainy days.
Is it sunny in Thoen?
Thoen gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
Are there tropical nights in Thoen?
Yes: Thoen has on average 253 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Thoen?
In Thoen, between 1940 and 2025, the highest apparent temperature reached 46.6 °C on 11 May 2016, and the lowest was 2.7 °C on 25 December 1999.
Compare Thoen with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Thoen