Phayao climate — normals and trends
Phayao (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.3 °C and it receives 1,272 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 (28.4 °C on average) and the coldest is January (20.9 °C). Rainfall peaks in August.
Phayao averages 0 frost days, 234 hot days (≥ 30 °C) and 160 rainy days per year.
Phayao 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 42.3 °C (on 9 April 2024) and the coldest 5.3 °C (on 1 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
PhayaoPhayao
- coords
- 19.19°, 99.88°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.3°C
Average daily high
31.1°C
Average daily low
21.1°C
Annual rainfall
1,272mm
Sunshine / day
9.5h
Mean relative humidity
73%
Average peak wind
9.2km/h
Seasonal range
7.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
234 d/yr
Rainy days (≥ 1 mm)
160 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.7 °C
Average feels-like low
23.9 °C
Average peak gust
26.8 km/h
Tropical nights (≥ 20 °C)
242 d/yr
Solar radiation
17.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.78 · 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
42.3 °C
9 April 2024
Coldest day
5.3 °C
1 January 1974
Wettest day
133 mm
11 May 1978
Windiest day
21.9 km/h
3 May 1976
Strongest gust
67.7 km/h
23 August 1987
Hottest feels-like
47.1 °C
9 April 2024
Coldest feels-like
2.5 °C
1 January 1974
Sunniest day
13.0 h
26 June 1941
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 | 28.7 °C | +0.2 °C | 0 mm | -15 mm |
| Feb | 32.8 °C | +1.3 °C | 5 mm | -6 mm |
| Mar | 35.1 °C | +1.0 °C | 2 mm | -32 mm |
| Apr | 35.4 °C | +0.4 °C | 56 mm | -16 mm |
| May | 33.4 °C | +0.2 °C | 190 mm | +27 mm |
| Jun | 33.0 °C | +1.1 °C | 114 mm | -39 mm |
| Jul | 30.9 °C | -0.2 °C | 377 mm | +184 mm |
| Aug | 32.1 °C | +1.4 °C | 192 mm | -45 mm |
| Sep | 32.0 °C | +1.3 °C | 105 mm | -121 mm |
| Oct | 31.9 °C | +1.8 °C | 50 mm | -65 mm |
| Nov | 28.3 °C | -0.3 °C | 89 mm | +49 mm |
| Dec | 28.8 °C | +1.6 °C | 8 mm | -6 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 Phayao?
Phayao has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.3 °C and it receives 1,272 mm of precipitation per year.
What is the hottest day ever recorded in Phayao?
The hottest day measured in Phayao between 1940 and 2025 was 9 April 2024, reaching 42.3 °C.
What is the coldest day in Phayao?
The coldest day measured in Phayao between 1940 and 2025 was 1 January 1974, at 5.3 °C.
Does it snow in Phayao?
Almost never: Phayao sees virtually no snow, with about 0 frost days per year.
Has the climate of Phayao warmed?
Yes: Phayao warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Phayao?
The wettest day measured in Phayao between 1940 and 2025 was 11 May 1978, with 133 mm of rain in 24 hours.
What was the windiest day in Phayao?
The windiest day measured in Phayao between 1940 and 2025 was 3 May 1976, with winds reaching 21.9 km/h.
What is the warmest month in Phayao?
The warmest month in Phayao is April (28.4 °C on average); the coldest is January (20.9 °C).
How much does it rain in Phayao?
Phayao receives on average 1,272 mm of precipitation per year, spread over about 160 rainy days.
Is it sunny in Phayao?
Phayao gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
Are there tropical nights in Phayao?
Yes: Phayao has on average 242 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Phayao?
In Phayao, between 1940 and 2025, the highest apparent temperature reached 47.1 °C on 9 April 2024, and the lowest was 2.5 °C on 1 January 1974.
Compare Phayao with another city
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Nearby cities
The climate around Phayao