Lom Sak climate — normals and trends
Lom Sak (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 866 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 (28.2 °C on average) and the coldest is December (22.6 °C). Rainfall peaks in September.
Lom Sak averages 0 frost days, 270 hot days (≥ 30 °C) and 127 rainy days per year.
Lom Sak has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.4 °C (on 20 April 2019) and the coldest 4.2 °C (on 2 January 1974).
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
Lom SakPhetchabun
- coords
- 16.78°, 101.24°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.8°C
Average daily high
31.7°C
Average daily low
21.3°C
Annual rainfall
866mm
Sunshine / day
9.5h
Mean relative humidity
73%
Average peak wind
9.3km/h
Seasonal range
5.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
270 d/yr
Rainy days (≥ 1 mm)
127 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.5 °C
Average feels-like low
24.4 °C
Average peak gust
28.1 km/h
Tropical nights (≥ 20 °C)
264 d/yr
Solar radiation
17.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.65 · 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
40.4 °C
20 April 2019
Coldest day
4.2 °C
2 January 1974
Wettest day
190 mm
9 September 1959
Windiest day
27.7 km/h
26 October 1943
Strongest gust
65.9 km/h
10 May 1986
Hottest feels-like
46.4 °C
15 April 1953
Coldest feels-like
1.1 °C
2 January 1974
Sunniest day
12.8 h
7 July 2023
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.2 °C | -0.2 °C | 0 mm | -9 mm |
| Feb | 32.3 °C | +0.2 °C | 39 mm | +25 mm |
| Mar | 33.3 °C | -0.4 °C | 5 mm | -20 mm |
| Apr | 34.2 °C | -0.5 °C | 22 mm | -19 mm |
| May | 32.6 °C | -0.9 °C | 177 mm | +72 mm |
| Jun | 32.0 °C | +0.1 °C | 88 mm | -21 mm |
| Jul | 30.7 °C | -0.5 °C | 172 mm | +49 mm |
| Aug | 32.0 °C | +1.4 °C | 163 mm | +8 mm |
| Sep | 30.6 °C | +0.1 °C | 137 mm | -48 mm |
| Oct | 31.5 °C | +0.7 °C | 67 mm | -10 mm |
| Nov | 29.9 °C | -0.9 °C | 66 mm | +49 mm |
| Dec | 31.3 °C | +1.6 °C | 12 mm | +8 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 Lom Sak?
Lom Sak has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 866 mm of precipitation per year.
What is the hottest day ever recorded in Lom Sak?
The hottest day measured in Lom Sak between 1940 and 2025 was 20 April 2019, reaching 40.4 °C.
What is the coldest day in Lom Sak?
The coldest day measured in Lom Sak between 1940 and 2025 was 2 January 1974, at 4.2 °C.
Does it snow in Lom Sak?
Almost never: Lom Sak sees virtually no snow, with about 0 frost days per year.
Has the climate of Lom Sak warmed?
Yes: Lom Sak warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lom Sak?
The wettest day measured in Lom Sak between 1940 and 2025 was 9 September 1959, with 190 mm of rain in 24 hours.
What was the windiest day in Lom Sak?
The windiest day measured in Lom Sak between 1940 and 2025 was 26 October 1943, with winds reaching 27.7 km/h.
What is the warmest month in Lom Sak?
The warmest month in Lom Sak is April (28.2 °C on average); the coldest is December (22.6 °C).
How much does it rain in Lom Sak?
Lom Sak receives on average 866 mm of precipitation per year, spread over about 127 rainy days.
Is it sunny in Lom Sak?
Lom Sak gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
Are there tropical nights in Lom Sak?
Yes: Lom Sak has on average 264 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Lom Sak?
In Lom Sak, between 1940 and 2025, the highest apparent temperature reached 46.4 °C on 15 April 1953, and the lowest was 1.1 °C on 2 January 1974.
Compare Lom Sak with another city
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Nearby cities
The climate around Lom Sak