Nan weather in December
In December, Nan sees average daytime highs of 29°C and overnight lows near 17°C, with 14 mm of rain across 1.7 wet days and about 10.9 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 62% of the time in December, and the air most often feels humid.
Daylight stretches from about 11 hours at the start of December to 10 h 54 min by month's end. Set against the rest of the year, December is Nan's 4th-clearest and 9th-windiest month. For the whole year in context, see Nan's year-round climate.
- Daytime high
- 29°
- 12th warmest
- Overnight low
- 17°
- 2nd coldest
- Rainfall
- 14 mm
- 1.7 wet days
- Daylight
- 10 h 54 min
- 6:47 AM – 5:39 PM
- Cloud cover
- 34%
- 4th clearest
- Wind
- 4 km/h
- 9th windiest
- Solar energy
- 4.37 kWh/m²
- Travel score
- 6.6
- out of 10
Nan is town in Nan province, Thailand.
- Air quality
- High
- PM2.5 29.5 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 29°C through the month.
A typical December day in Nan reaches about 29°C in the afternoon and slips back to 17°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 32°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 19 |
| 2 | 30 | 19 |
| 3 | 30 | 18 |
| 4 | 30 | 18 |
| 5 | 30 | 18 |
| 6 | 30 | 18 |
| 7 | 30 | 18 |
| 8 | 30 | 18 |
| 9 | 30 | 18 |
| 10 | 30 | 18 |
| 11 | 30 | 18 |
| 12 | 30 | 17 |
| 13 | 30 | 17 |
| 14 | 29 | 17 |
| 15 | 29 | 17 |
| 16 | 29 | 17 |
| 17 | 29 | 17 |
| 18 | 29 | 17 |
| 19 | 29 | 17 |
| 20 | 29 | 16 |
| 21 | 29 | 16 |
| 22 | 29 | 16 |
| 23 | 29 | 16 |
| 24 | 29 | 16 |
| 25 | 29 | 16 |
| 26 | 29 | 16 |
| 27 | 29 | 16 |
| 28 | 29 | 16 |
| 29 | 29 | 16 |
| 30 | 29 | 16 |
| 31 | 29 | 16 |
How December really feels in Nan
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Nan weather by month
How December compares with the rest of the year at a glance. December is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 16° | 15 | 2 | 11 | 6.4 |
| Feb | 33° / 17° | 8 | 1.2 | 11.4 | 4.7 |
| Mar | 35° / 20° | 30 | 4.6 | 11.9 | 2.9 |
| Apr | 36° / 24° | 78 | 11.6 | 12.4 | 2.2 |
| May | 34° / 25° | 166 | 21.5 | 12.9 | 2.3 |
| Jun | 32° / 25° | 190 | 23.4 | 13.1 | 2.5 |
| Jul | 31° / 25° | 273 | 26.5 | 13 | 2.6 |
| Aug | 31° / 24° | 312 | 28.1 | 12.6 | 2.6 |
| Sep | 31° / 24° | 221 | 24.4 | 12.1 | 2.8 |
| Oct | 31° / 23° | 74 | 13.8 | 11.6 | 4.1 |
| Nov | 31° / 20° | 22 | 3.5 | 11.1 | 5.4 |
| Dec | 29° / 17° | 14 | 1.7 | 10.9 | 6.6 |
Cloud cover in December
The sky is clear or mostly clear about 62% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 78 | 77 | 77 | 77 | 76 | 76 | 76 | 75 | 75 | 75 | 76 | 76 | 77 | 77 | 78 | 79 | 80 | 80 | 81 | 82 | 82 | 83 | 83 | 83 | 82 | 82 | 82 | 82 | 81 | 80 | 80 |
| Cloudier (%) | 22 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 21 | 20 | 20 | 19 | 18 | 18 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 20 | 20 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 78 | 22 |
| 2 | 77 | 23 |
| 3 | 77 | 23 |
| 4 | 77 | 23 |
| 5 | 76 | 24 |
| 6 | 76 | 24 |
| 7 | 76 | 24 |
| 8 | 75 | 25 |
| 9 | 75 | 25 |
| 10 | 75 | 25 |
| 11 | 76 | 24 |
| 12 | 76 | 24 |
| 13 | 77 | 23 |
| 14 | 77 | 23 |
| 15 | 78 | 22 |
| 16 | 79 | 21 |
| 17 | 80 | 20 |
| 18 | 80 | 20 |
| 19 | 81 | 19 |
| 20 | 82 | 18 |
| 21 | 82 | 18 |
| 22 | 83 | 17 |
| 23 | 83 | 17 |
| 24 | 83 | 17 |
| 25 | 82 | 18 |
| 26 | 82 | 18 |
| 27 | 82 | 18 |
| 28 | 82 | 18 |
| 29 | 81 | 19 |
| 30 | 80 | 20 |
| 31 | 80 | 20 |
Chance of precipitation in December
Nan gets around 14 mm of rain over 1.7 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 6% and peaks near 9% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 9 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 |
| Rain chance (%) | |
|---|---|
| 1 | 9 |
| 2 | 8 |
| 3 | 8 |
| 4 | 8 |
| 5 | 8 |
| 6 | 7 |
| 7 | 7 |
| 8 | 7 |
| 9 | 6 |
| 10 | 6 |
| 11 | 5 |
| 12 | 5 |
| 13 | 5 |
| 14 | 4 |
| 15 | 4 |
| 16 | 4 |
| 17 | 4 |
| 18 | 4 |
| 19 | 4 |
| 20 | 4 |
| 21 | 4 |
| 22 | 5 |
| 23 | 5 |
| 24 | 5 |
| 25 | 5 |
| 26 | 6 |
| 27 | 6 |
| 28 | 6 |
| 29 | 7 |
| 30 | 7 |
| 31 | 7 |
Humidity in December
Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the humid band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 26% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 12 | 13 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 12 | 11 |
| Comfortable (%) | 10 | 11 | 12 | 13 | 13 | 14 | 15 | 16 | 17 | 19 | 20 | 21 | 22 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 32 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 |
| Humid (%) | 37 | 37 | 38 | 38 | 39 | 40 | 40 | 41 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 38 | 38 | 38 | 37 | 37 | 37 | 38 | 38 | 39 | 40 | 40 | 41 |
| Muggy (%) | 40 | 39 | 37 | 36 | 35 | 33 | 32 | 31 | 29 | 28 | 27 | 26 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 |
| Oppressive (%) | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 4 | 10 | 37 | 40 | 9 |
| 2 | 5 | 11 | 37 | 39 | 8 |
| 3 | 5 | 12 | 38 | 37 | 8 |
| 4 | 5 | 13 | 38 | 36 | 8 |
| 5 | 5 | 13 | 39 | 35 | 7 |
| 6 | 6 | 14 | 40 | 33 | 7 |
| 7 | 6 | 15 | 40 | 32 | 7 |
| 8 | 6 | 16 | 41 | 31 | 6 |
| 9 | 6 | 17 | 42 | 29 | 6 |
| 10 | 7 | 19 | 42 | 28 | 5 |
| 11 | 7 | 20 | 42 | 27 | 4 |
| 12 | 8 | 21 | 42 | 26 | 4 |
| 13 | 8 | 22 | 42 | 24 | 3 |
| 14 | 9 | 24 | 41 | 23 | 3 |
| 15 | 10 | 25 | 41 | 22 | 3 |
| 16 | 11 | 26 | 40 | 21 | 2 |
| 17 | 12 | 27 | 40 | 20 | 2 |
| 18 | 12 | 28 | 39 | 19 | 2 |
| 19 | 13 | 29 | 39 | 18 | 2 |
| 20 | 14 | 30 | 38 | 17 | 1 |
| 21 | 14 | 31 | 38 | 16 | 1 |
| 22 | 14 | 32 | 38 | 15 | 1 |
| 23 | 15 | 32 | 37 | 15 | 1 |
| 24 | 15 | 33 | 37 | 14 | 1 |
| 25 | 15 | 33 | 37 | 14 | 1 |
| 26 | 15 | 34 | 38 | 13 | 1 |
| 27 | 14 | 34 | 38 | 13 | 1 |
| 28 | 14 | 34 | 39 | 13 | 1 |
| 29 | 13 | 34 | 40 | 13 | 1 |
| 30 | 12 | 34 | 40 | 13 | 1 |
| 31 | 11 | 34 | 41 | 13 | 1 |
Wind in December
Winds average 4 km/h in December.
Across December, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
| 31 | 4 | calm |
Sunrise & sunset in December
Daylight runs from about 11 hours at the start of December to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 6 minutes over December. Sunrise moves from 6:38 AM to 6:54 AM, and sunset from 5:35 PM to 5:47 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.0 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 | 10.9 |
| Sunrise (AM) | 6:38 | 6:39 | 6:39 | 6:40 | 6:41 | 6:41 | 6:42 | 6:42 | 6:43 | 6:43 | 6:44 | 6:45 | 6:45 | 6:46 | 6:46 | 6:47 | 6:47 | 6:48 | 6:48 | 6:49 | 6:49 | 6:50 | 6:50 | 6:51 | 6:51 | 6:52 | 6:52 | 6:52 | 6:53 | 6:53 | 6:54 |
| Sunset (PM) | 5:35 | 5:35 | 5:35 | 5:36 | 5:36 | 5:36 | 5:36 | 5:37 | 5:37 | 5:37 | 5:38 | 5:38 | 5:38 | 5:39 | 5:39 | 5:39 | 5:40 | 5:40 | 5:41 | 5:41 | 5:41 | 5:42 | 5:42 | 5:43 | 5:43 | 5:44 | 5:44 | 5:45 | 5:45 | 5:46 | 5:47 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.0 | 6:38 | 5:35 |
| 2 | 10.9 | 6:39 | 5:35 |
| 3 | 10.9 | 6:39 | 5:35 |
| 4 | 10.9 | 6:40 | 5:36 |
| 5 | 10.9 | 6:41 | 5:36 |
| 6 | 10.9 | 6:41 | 5:36 |
| 7 | 10.9 | 6:42 | 5:36 |
| 8 | 10.9 | 6:42 | 5:37 |
| 9 | 10.9 | 6:43 | 5:37 |
| 10 | 10.9 | 6:43 | 5:37 |
| 11 | 10.9 | 6:44 | 5:38 |
| 12 | 10.9 | 6:45 | 5:38 |
| 13 | 10.9 | 6:45 | 5:38 |
| 14 | 10.9 | 6:46 | 5:39 |
| 15 | 10.9 | 6:46 | 5:39 |
| 16 | 10.9 | 6:47 | 5:39 |
| 17 | 10.9 | 6:47 | 5:40 |
| 18 | 10.9 | 6:48 | 5:40 |
| 19 | 10.9 | 6:48 | 5:41 |
| 20 | 10.9 | 6:49 | 5:41 |
| 21 | 10.9 | 6:49 | 5:41 |
| 22 | 10.9 | 6:50 | 5:42 |
| 23 | 10.9 | 6:50 | 5:42 |
| 24 | 10.9 | 6:51 | 5:43 |
| 25 | 10.9 | 6:51 | 5:43 |
| 26 | 10.9 | 6:52 | 5:44 |
| 27 | 10.9 | 6:52 | 5:44 |
| 28 | 10.9 | 6:52 | 5:45 |
| 29 | 10.9 | 6:53 | 5:45 |
| 30 | 10.9 | 6:53 | 5:46 |
| 31 | 10.9 | 6:54 | 5:47 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 4.37 kWh/m².
For context, solar energy here swings from a low near 3.85 kWh/m² to a high of 6.22 kWh/m² in April across the year — December's 4.37 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.3 | Bright |
| 2 | 4.3 | Bright |
| 3 | 4.3 | Bright |
| 4 | 4.3 | Bright |
| 5 | 4.3 | Bright |
| 6 | 4.3 | Bright |
| 7 | 4.3 | Bright |
| 8 | 4.3 | Bright |
| 9 | 4.3 | Bright |
| 10 | 4.3 | Bright |
| 11 | 4.3 | Bright |
| 12 | 4.3 | Bright |
| 13 | 4.3 | Bright |
| 14 | 4.4 | Bright |
| 15 | 4.4 | Bright |
| 16 | 4.4 | Bright |
| 17 | 4.4 | Bright |
| 18 | 4.4 | Bright |
| 19 | 4.4 | Bright |
| 20 | 4.4 | Bright |
| 21 | 4.4 | Bright |
| 22 | 4.4 | Bright |
| 23 | 4.5 | Bright |
| 24 | 4.5 | Bright |
| 25 | 4.5 | Bright |
| 26 | 4.5 | Bright |
| 27 | 4.4 | Bright |
| 28 | 4.4 | Bright |
| 29 | 4.4 | Bright |
| 30 | 4.4 | Bright |
| 31 | 4.4 | Bright |
Hazard calendar for Nan
None of Nan's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Nan's monsoon runs May–September, when most of the year's rain falls.
Is December a good time to visit Nan?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Nan for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Nan in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Nan sees daytime highs around 29°C and nights near 17°C. Pack light clothes.
UV index in Nan in December
Clear-sky midday UV in December peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nan peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (very 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 Nan in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Nan is worst in March — around 71 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (September, 17 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Nan's WHO annual average of 29.5 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 27 | 39 | 71 | 65 | 28 | 17 | 17 | 17 | 17 | 17 | 18 | 21 |
| Level | Moderate | Poor | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 27 | Moderate |
| Feb | 39 | Poor |
| Mar | 71 | Unhealthy |
| Apr | 65 | Unhealthy |
| May | 28 | Moderate |
| Jun | 17 | Moderate |
| Jul | 17 | Moderate |
| Aug | 17 | Moderate |
| Sep | 17 | Moderate |
| Oct | 17 | Moderate |
| Nov | 18 | Moderate |
| Dec | 21 | Moderate |
Where is Nan?
Nan sits at 18.8°N, 100.8°E, 205 m above sea level, in Thailand. The nearest listed city is Dok Kham Tai, 93 km away.
Topography around Nan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nan.
Within 3 km, the terrain around Nan has only modest variations in elevation — a maximum elevation change of 61 m around an average of 208 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 478 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,915 m.
The land around Nan is covered by trees (39%), artificial surfaces (28%) and cropland (21%) within 3 km, trees (76%) within 16 km, and trees (87%) 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 Nan (18.7838°, 100.779°, elevation 205 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).