Phayao in Fall
In fall (September, October and November), Phayao sees average daytime highs around 31°C and overnight lows near 22°C, with 337 mm of rain over about 43 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 32°C in early September to 29°C by late November. The sky is clear or mostly clear about 33% of the time across fall, and the air most often feels oppressive.
Fall is Phayao's 2nd-best season to visit on our travel score. For the whole year in context, see Phayao's year-round climate.
- Avg daytime high
- 31°C
- 3rd-warmest season
- Avg overnight low
- 22°C
- Rainfall
- 337 mm
- 43 wet days
- Avg wind
- 4 km/h
- Travel score
- 4.3
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Phayao in Fall
Over the season highs ease from about 32°C in early September to 29°C by late November.
A typical fall day in Phayao reaches about 31°C and drops to 22°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Phayao
Once humidity and wind are folded in, fall brings about 65 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Phayao weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 16° | 15 | 2.5 | 11 | 6.8 |
| Feb | 32° / 17° | 6 | 1.2 | 11.3 | 5.2 |
| Mar | 35° / 20° | 28 | 3.9 | 11.9 | 3.4 |
| Apr | 35° / 24° | 71 | 9.5 | 12.4 | 2.4 |
| May | 34° / 25° | 166 | 19.7 | 12.9 | 2.4 |
| Jun | 33° / 25° | 144 | 21.5 | 13.1 | 2.4 |
| Jul | 32° / 25° | 221 | 24.8 | 13 | 2.5 |
| Aug | 31° / 25° | 253 | 26.4 | 12.7 | 2.6 |
| Sep | 32° / 24° | 208 | 23 | 12.1 | 2.8 |
| Oct | 31° / 23° | 98 | 14.7 | 11.6 | 4.1 |
| Nov | 30° / 20° | 31 | 5 | 11.1 | 6.0 |
| Dec | 28° / 17° | 16 | 2.4 | 10.9 | 7.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 33% of the time across fall.
Chance of precipitation in Fall
Phayao gets around 337 mm of rain over 43 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 4 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 10 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.4 kWh/m².
Hazard calendar for Phayao
In fall, Phayao overlaps its cyclone and monsoon season. The full year is below, with each hazard's peak months called out.
Phayao sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Phayao's monsoon runs May–September, when most of the year's rain falls.
Is fall a good time to visit Phayao?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Phayao for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Phayao in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Phayao sees daytime highs around 31°C and nights near 22°C. Pack light clothes and rain gear. About 43 days see rain.
UV index in Phayao in Fall
Clear-sky midday UV across fall averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Phayao peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 9 | 9 | 10 | 11 | 13 | 13 | 13 | 11 | 10 | 8 | 7 |
| Level | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 9 | Very high |
| Mar | 9 | Very high |
| Apr | 10 | Very high |
| May | 11 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Phayao in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Phayao is worst in March — around 51 µg/m³ PM2.5 (poor), about 5.9× the cleanest month (July, 9 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Phayao's WHO annual average of 18 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 23 | 51 | 39 | 16 | 9 | 9 | 9 | 9 | 10 | 11 | 13 |
| Level | Moderate | Moderate | Poor | Poor | Moderate | Good | Good | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 23 | Moderate |
| Mar | 51 | Poor |
| Apr | 39 | Poor |
| May | 16 | Moderate |
| Jun | 9 | Good |
| Jul | 9 | Good |
| Aug | 9 | Good |
| Sep | 9 | Good |
| Oct | 10 | Good |
| Nov | 11 | Good |
| Dec | 13 | Moderate |
Where is Phayao?
Phayao sits at 19.2°N, 99.9°E, 409 m above sea level, in Thailand. The nearest listed city is Dok Kham Tai, 12 km away.
Topography around Phayao
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Phayao.
Within 3 km, the terrain around Phayao has only modest variations in elevation — a maximum elevation change of 61 m around an average of 402 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,289 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,796 m.
The land around Phayao is covered by trees (33%) and water (30%) within 3 km, cropland (45%) and trees (44%) within 16 km, and trees (77%) within 80 km.
Thailand travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C
- 230 V · 50 Hz
- Prices
- ≈ 31% of US
- price level, 2025
- GDP per capita
- $8,057
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Homicide rate
- 4.8
- per 100k, 2011
- Road deaths
- 32.2
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 402
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Phayao (19.192°, 99.8788°, elevation 409 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.