Khao Yoi climate — normals and trends
Khao Yoi (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.0 °C and it receives 1,255 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 (29.3 °C on average) and the coldest is December (24.4 °C). Rainfall peaks in September.
Khao Yoi averages 0 frost days, 262 hot days (≥ 30 °C) and 177 rainy days per year.
Khao Yoi has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.4 °C (on 3 May 1980) and the coldest 11.5 °C (on 25 December 1999).
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
Khao YoiPhetchaburi
- coords
- 13.24°, 99.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.0°C
Average daily high
31.4°C
Average daily low
23.6°C
Annual rainfall
1,255mm
Sunshine / day
9.7h
Mean relative humidity
75%
Average peak wind
11.8km/h
Seasonal range
4.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
262 d/yr
Rainy days (≥ 1 mm)
177 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.0 °C
Average feels-like low
27.5 °C
Average peak gust
30.3 km/h
Tropical nights (≥ 20 °C)
333 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.75 · 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
39.4 °C
3 May 1980
Coldest day
11.5 °C
25 December 1999
Wettest day
174 mm
30 September 1996
Windiest day
30.6 km/h
4 November 1997
Strongest gust
64.8 km/h
4 November 1997
Hottest feels-like
46.1 °C
25 April 2019
Coldest feels-like
8.3 °C
25 December 1999
Sunniest day
12.8 h
6 July 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 | 28.8 °C | -1.1 °C | 1 mm | -13 mm |
| Feb | 31.2 °C | -0.6 °C | 42 mm | +18 mm |
| Mar | 33.0 °C | -0.5 °C | 28 mm | -11 mm |
| Apr | 34.8 °C | +0.2 °C | 66 mm | -5 mm |
| May | 33.1 °C | -0.3 °C | 245 mm | +94 mm |
| Jun | 32.9 °C | +0.7 °C | 101 mm | -32 mm |
| Jul | 32.1 °C | +0.6 °C | 153 mm | -4 mm |
| Aug | 32.4 °C | +1.2 °C | 162 mm | -4 mm |
| Sep | 31.3 °C | +0.5 °C | 270 mm | +59 mm |
| Oct | 30.6 °C | +0.7 °C | 152 mm | -54 mm |
| Nov | 28.9 °C | -0.5 °C | 110 mm | +40 mm |
| Dec | 29.5 °C | +0.6 °C | 5 mm | -9 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 Khao Yoi?
Khao Yoi has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.0 °C and it receives 1,255 mm of precipitation per year.
What is the hottest day ever recorded in Khao Yoi?
The hottest day measured in Khao Yoi between 1940 and 2025 was 3 May 1980, reaching 39.4 °C.
What is the coldest day in Khao Yoi?
The coldest day measured in Khao Yoi between 1940 and 2025 was 25 December 1999, at 11.5 °C.
Does it snow in Khao Yoi?
Almost never: Khao Yoi sees virtually no snow, with about 0 frost days per year.
Has the climate of Khao Yoi warmed?
Yes: Khao Yoi warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Khao Yoi?
The wettest day measured in Khao Yoi between 1940 and 2025 was 30 September 1996, with 174 mm of rain in 24 hours.
What was the windiest day in Khao Yoi?
The windiest day measured in Khao Yoi between 1940 and 2025 was 4 November 1997, with winds reaching 30.6 km/h.
What is the warmest month in Khao Yoi?
The warmest month in Khao Yoi is April (29.3 °C on average); the coldest is December (24.4 °C).
How much does it rain in Khao Yoi?
Khao Yoi receives on average 1,255 mm of precipitation per year, spread over about 177 rainy days.
Is it sunny in Khao Yoi?
Khao Yoi gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
Are there tropical nights in Khao Yoi?
Yes: Khao Yoi has on average 333 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Khao Yoi?
In Khao Yoi, between 1940 and 2025, the highest apparent temperature reached 46.1 °C on 25 April 2019, and the lowest was 8.3 °C on 25 December 1999.
Compare Khao Yoi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Khao Yoi