Pa Sang climate — normals and trends
Pa Sang (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 1,085 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 (29.4 °C on average) and the coldest is December (21.3 °C). Rainfall peaks in September.
Pa Sang averages 0 frost days, 253 hot days (≥ 30 °C) and 141 rainy days per year.
Pa Sang 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 43.2 °C (on 16 April 1983) and the coldest 4.3 °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
Pa SangLamphun
- coords
- 18.53°, 98.94°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.8°C
Average daily high
31.8°C
Average daily low
21.1°C
Annual rainfall
1,085mm
Sunshine / day
9.8h
Mean relative humidity
71%
Average peak wind
8.2km/h
Seasonal range
8.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
253 d/yr
Rainy days (≥ 1 mm)
141 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.3 °C
Average feels-like low
24.0 °C
Average peak gust
24.5 km/h
Tropical nights (≥ 20 °C)
244 d/yr
Solar radiation
17.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.73 · 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
43.2 °C
16 April 1983
Coldest day
4.3 °C
25 December 1999
Wettest day
152 mm
17 May 2017
Windiest day
26.6 km/h
8 May 1975
Strongest gust
65.2 km/h
8 May 1975
Hottest feels-like
46.1 °C
13 May 2016
Coldest feels-like
2.1 °C
25 December 1999
Sunniest day
13.0 h
11 June 1940
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 | 28.9 °C | -0.3 °C | 0 mm | -9 mm |
| Feb | 32.8 °C | +0.5 °C | 11 mm | +5 mm |
| Mar | 35.0 °C | -0.1 °C | 0 mm | -17 mm |
| Apr | 35.2 °C | -1.2 °C | 36 mm | -4 mm |
| May | 32.9 °C | -1.2 °C | 148 mm | +19 mm |
| Jun | 32.3 °C | -0.1 °C | 104 mm | -23 mm |
| Jul | 31.6 °C | -0.3 °C | 171 mm | +32 mm |
| Aug | 32.1 °C | +1.0 °C | 187 mm | -4 mm |
| Sep | 31.8 °C | +0.9 °C | 162 mm | -70 mm |
| Oct | 32.0 °C | +1.7 °C | 97 mm | -47 mm |
| Nov | 28.2 °C | -1.1 °C | 134 mm | +94 mm |
| Dec | 29.0 °C | +1.0 °C | 4 mm | -7 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 Pa Sang?
Pa Sang has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 1,085 mm of precipitation per year.
What is the hottest day ever recorded in Pa Sang?
The hottest day measured in Pa Sang between 1940 and 2025 was 16 April 1983, reaching 43.2 °C.
What is the coldest day in Pa Sang?
The coldest day measured in Pa Sang between 1940 and 2025 was 25 December 1999, at 4.3 °C.
Does it snow in Pa Sang?
Almost never: Pa Sang sees virtually no snow, with about 0 frost days per year.
Has the climate of Pa Sang warmed?
Yes: Pa Sang warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Pa Sang?
The wettest day measured in Pa Sang between 1940 and 2025 was 17 May 2017, with 152 mm of rain in 24 hours.
What was the windiest day in Pa Sang?
The windiest day measured in Pa Sang between 1940 and 2025 was 8 May 1975, with winds reaching 26.6 km/h.
What is the warmest month in Pa Sang?
The warmest month in Pa Sang is April (29.4 °C on average); the coldest is December (21.3 °C).
How much does it rain in Pa Sang?
Pa Sang receives on average 1,085 mm of precipitation per year, spread over about 141 rainy days.
Is it sunny in Pa Sang?
Pa Sang gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.
Are there tropical nights in Pa Sang?
Yes: Pa Sang has on average 244 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Pa Sang?
In Pa Sang, between 1940 and 2025, the highest apparent temperature reached 46.1 °C on 13 May 2016, and the lowest was 2.1 °C on 25 December 1999.
Compare Pa Sang with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Pa Sang