Smach Mean Chey climate — normals and trends
Smach Mean Chey (Cambodia) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.2 °C and it receives 3,361 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 (27.0 °C on average) and the coldest is January (25.6 °C). Rainfall peaks in August.
Smach Mean Chey averages 0 frost days, 64 hot days (≥ 30 °C) and 263 rainy days per year.
Smach Mean Chey has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.7 °C (on 23 March 1998) and the coldest 17.1 °C (on 17 January 1967).
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
Smach Mean CheyKoh Kong
- coords
- 11.55°, 103.04°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.2°C
Average daily high
28.7°C
Average daily low
24.3°C
Annual rainfall
3,361mm
Sunshine / day
9.5h
Mean relative humidity
83%
Average peak wind
14.9km/h
Seasonal range
1.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
64 d/yr
Rainy days (≥ 1 mm)
263 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.9 °C
Average feels-like low
28.2 °C
Average peak gust
29.2 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
17.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.77 · 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
33.7 °C
23 March 1998
Coldest day
17.1 °C
17 January 1967
Wettest day
144 mm
12 May 2003
Windiest day
48.3 km/h
5 October 1960
Strongest gust
72.7 km/h
5 October 1960
Hottest feels-like
40.9 °C
3 May 2024
Coldest feels-like
15.0 °C
17 January 1967
Sunniest day
12.4 h
23 July 1958
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 | 30.2 °C | +1.1 °C | 2 mm | -34 mm |
| Feb | 29.9 °C | +1.0 °C | 82 mm | +22 mm |
| Mar | 29.9 °C | +0.7 °C | 122 mm | +21 mm |
| Apr | 30.0 °C | +0.3 °C | 149 mm | +5 mm |
| May | 29.6 °C | +0.5 °C | 327 mm | -22 mm |
| Jun | 28.6 °C | +0.4 °C | 542 mm | +8 mm |
| Jul | 28.4 °C | +0.6 °C | 550 mm | -28 mm |
| Aug | 28.1 °C | +0.5 °C | 518 mm | -80 mm |
| Sep | 27.8 °C | +0.2 °C | 561 mm | +43 mm |
| Oct | 29.1 °C | +0.6 °C | 194 mm | -112 mm |
| Nov | 28.8 °C | -0.5 °C | 126 mm | +22 mm |
| Dec | 30.5 °C | +1.1 °C | 13 mm | -18 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 Smach Mean Chey?
Smach Mean Chey has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.2 °C and it receives 3,361 mm of precipitation per year.
What is the hottest day ever recorded in Smach Mean Chey?
The hottest day measured in Smach Mean Chey between 1940 and 2025 was 23 March 1998, reaching 33.7 °C.
What is the coldest day in Smach Mean Chey?
The coldest day measured in Smach Mean Chey between 1940 and 2025 was 17 January 1967, at 17.1 °C.
Does it snow in Smach Mean Chey?
Almost never: Smach Mean Chey sees virtually no snow, with about 0 frost days per year.
Has the climate of Smach Mean Chey warmed?
Yes: Smach Mean Chey warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Smach Mean Chey?
The wettest day measured in Smach Mean Chey between 1940 and 2025 was 12 May 2003, with 144 mm of rain in 24 hours.
What was the windiest day in Smach Mean Chey?
The windiest day measured in Smach Mean Chey between 1940 and 2025 was 5 October 1960, with winds reaching 48.3 km/h.
What is the warmest month in Smach Mean Chey?
The warmest month in Smach Mean Chey is April (27.0 °C on average); the coldest is January (25.6 °C).
How much does it rain in Smach Mean Chey?
Smach Mean Chey receives on average 3,361 mm of precipitation per year, spread over about 263 rainy days.
Is it sunny in Smach Mean Chey?
Smach Mean Chey gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
Are there tropical nights in Smach Mean Chey?
Yes: Smach Mean Chey has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Smach Mean Chey?
In Smach Mean Chey, between 1940 and 2025, the highest apparent temperature reached 40.9 °C on 3 May 2024, and the lowest was 15.0 °C on 17 January 1967.
Compare Smach Mean Chey with another city
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Nearby cities
The climate around Smach Mean Chey