Ban Phan Don climate — normals and trends
Ban Phan Don (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.3 °C and it receives 1,491 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 (29.1 °C on average) and the coldest is December (22.0 °C). Rainfall peaks in September.
Ban Phan Don averages 0 frost days, 260 hot days (≥ 30 °C) and 159 rainy days per year.
Ban Phan Don has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 43.1 °C (on 17 April 2016) and the coldest 3.5 °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
Ban Phan DonUdon Thani
- coords
- 17.14°, 102.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.3°C
Average daily high
31.4°C
Average daily low
22.2°C
Annual rainfall
1,491mm
Sunshine / day
9.8h
Mean relative humidity
73%
Average peak wind
11.8km/h
Seasonal range
7.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
260 d/yr
Rainy days (≥ 1 mm)
159 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.4 °C
Average feels-like low
25.1 °C
Average peak gust
28.2 km/h
Tropical nights (≥ 20 °C)
272 d/yr
Solar radiation
18.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.66 · 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
17 April 2016
Coldest day
3.5 °C
12 January 1955
Wettest day
139 mm
13 August 1956
Windiest day
35.0 km/h
17 September 1962
Strongest gust
69.5 km/h
5 November 1974
Hottest feels-like
48.2 °C
8 April 2024
Coldest feels-like
0.3 °C
12 January 1955
Sunniest day
12.7 h
8 July 2023
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 | 28.6 °C | -0.4 °C | 0 mm | -10 mm |
| Feb | 32.0 °C | +0.5 °C | 18 mm | +2 mm |
| Mar | 34.1 °C | +0.3 °C | 15 mm | -27 mm |
| Apr | 35.6 °C | +0.9 °C | 74 mm | -8 mm |
| May | 33.2 °C | 0.0 °C | 196 mm | -1 mm |
| Jun | 32.8 °C | +0.4 °C | 166 mm | -42 mm |
| Jul | 31.4 °C | -0.4 °C | 321 mm | +97 mm |
| Aug | 32.2 °C | +1.0 °C | 298 mm | +8 mm |
| Sep | 31.7 °C | +0.8 °C | 297 mm | +3 mm |
| Oct | 31.9 °C | +1.4 °C | 55 mm | -47 mm |
| Nov | 29.1 °C | -0.6 °C | 63 mm | +40 mm |
| Dec | 30.4 °C | +2.2 °C | 9 mm | +4 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 Ban Phan Don?
Ban Phan Don has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.3 °C and it receives 1,491 mm of precipitation per year.
What is the hottest day ever recorded in Ban Phan Don?
The hottest day measured in Ban Phan Don between 1940 and 2025 was 17 April 2016, reaching 43.1 °C.
What is the coldest day in Ban Phan Don?
The coldest day measured in Ban Phan Don between 1940 and 2025 was 12 January 1955, at 3.5 °C.
Does it snow in Ban Phan Don?
Almost never: Ban Phan Don sees virtually no snow, with about 0 frost days per year.
Has the climate of Ban Phan Don warmed?
Yes: Ban Phan Don warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ban Phan Don?
The wettest day measured in Ban Phan Don between 1940 and 2025 was 13 August 1956, with 139 mm of rain in 24 hours.
What was the windiest day in Ban Phan Don?
The windiest day measured in Ban Phan Don between 1940 and 2025 was 17 September 1962, with winds reaching 35.0 km/h.
What is the warmest month in Ban Phan Don?
The warmest month in Ban Phan Don is April (29.1 °C on average); the coldest is December (22.0 °C).
How much does it rain in Ban Phan Don?
Ban Phan Don receives on average 1,491 mm of precipitation per year, spread over about 159 rainy days.
Is it sunny in Ban Phan Don?
Ban Phan Don gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.
Are there tropical nights in Ban Phan Don?
Yes: Ban Phan Don has on average 272 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ban Phan Don?
In Ban Phan Don, between 1940 and 2025, the highest apparent temperature reached 48.2 °C on 8 April 2024, and the lowest was 0.3 °C on 12 January 1955.
Compare Ban Phan Don with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ban Phan Don