Nong Khiaw weather in September
In September, Nong Khiaw sees average daytime highs of 30°C and overnight lows near 22°C, with 180 mm of rain across 19.9 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.
Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 14% of the time in September, and the air most often feels oppressive.
Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Nong Khiaw's 9th-clearest and 12th-windiest month. For the whole year in context, see Nong Khiaw's year-round climate.
- Daytime high
- 30°
- 6th warmest
- Overnight low
- 22°
- 8th coldest
- Rainfall
- 180 mm
- 19.9 wet days
- Daylight
- 12 h 06 min
- 6:00 AM – 6:07 PM
- Cloud cover
- 75%
- 9th clearest
- Wind
- 3 km/h
- 12th windiest
- Solar energy
- 4.48 kWh/m²
- Travel score
- 3.9
- out of 10
Temperature in September
Day-to-day highs hold fairly steady near 30°C through the month.
A typical September day in Nong Khiaw reaches about 30°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 23 |
| 2 | 30 | 23 |
| 3 | 30 | 23 |
| 4 | 30 | 23 |
| 5 | 30 | 23 |
| 6 | 30 | 23 |
| 7 | 30 | 23 |
| 8 | 30 | 23 |
| 9 | 30 | 23 |
| 10 | 30 | 23 |
| 11 | 30 | 23 |
| 12 | 30 | 23 |
| 13 | 30 | 23 |
| 14 | 30 | 22 |
| 15 | 30 | 22 |
| 16 | 30 | 22 |
| 17 | 30 | 22 |
| 18 | 30 | 22 |
| 19 | 30 | 22 |
| 20 | 30 | 22 |
| 21 | 29 | 22 |
| 22 | 29 | 22 |
| 23 | 29 | 22 |
| 24 | 29 | 22 |
| 25 | 29 | 22 |
| 26 | 29 | 22 |
| 27 | 29 | 22 |
| 28 | 29 | 22 |
| 29 | 29 | 22 |
| 30 | 29 | 22 |
How September really feels in Nong Khiaw
Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Nong Khiaw weather by month
How September compares with the rest of the year at a glance. September is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 25° / 13° | 19 | 2.9 | 10.9 | 8.2 |
| Feb | 28° / 14° | 10 | 1.7 | 11.3 | 7.4 |
| Mar | 31° / 17° | 33 | 5.9 | 11.9 | 5.3 |
| Apr | 32° / 20° | 81 | 11.4 | 12.5 | 4.1 |
| May | 32° / 23° | 144 | 19 | 13 | 3.3 |
| Jun | 31° / 24° | 179 | 21.3 | 13.2 | 3.0 |
| Jul | 30° / 24° | 283 | 25.4 | 13.1 | 3.0 |
| Aug | 30° / 23° | 299 | 26.2 | 12.7 | 3.1 |
| Sep | 30° / 22° | 180 | 19.9 | 12.1 | 3.9 |
| Oct | 29° / 20° | 66 | 9.8 | 11.5 | 5.7 |
| Nov | 27° / 17° | 23 | 3.7 | 11 | 7.7 |
| Dec | 25° / 13° | 18 | 3 | 10.8 | 8.3 |
Cloud cover in September
The sky is clear or mostly clear about 14% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 72%. 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 16 | 17 | 17 | 18 | 18 | 20 | 21 | 22 | 22 | 23 | 24 | 24 | 25 | 25 | 27 | 28 | 29 | 29 | 30 | 32 | 32 | 33 | 35 | 36 | 37 | 40 | 41 | 42 | 42 | 44 |
| Cloudier (%) | 84 | 83 | 83 | 82 | 82 | 80 | 79 | 78 | 78 | 77 | 76 | 76 | 75 | 75 | 73 | 72 | 71 | 71 | 70 | 68 | 68 | 67 | 65 | 64 | 63 | 60 | 59 | 58 | 58 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 16 | 84 |
| 2 | 17 | 83 |
| 3 | 17 | 83 |
| 4 | 18 | 82 |
| 5 | 18 | 82 |
| 6 | 20 | 80 |
| 7 | 21 | 79 |
| 8 | 22 | 78 |
| 9 | 22 | 78 |
| 10 | 23 | 77 |
| 11 | 24 | 76 |
| 12 | 24 | 76 |
| 13 | 25 | 75 |
| 14 | 25 | 75 |
| 15 | 27 | 73 |
| 16 | 28 | 72 |
| 17 | 29 | 71 |
| 18 | 29 | 71 |
| 19 | 30 | 70 |
| 20 | 32 | 68 |
| 21 | 32 | 68 |
| 22 | 33 | 67 |
| 23 | 35 | 65 |
| 24 | 36 | 64 |
| 25 | 37 | 63 |
| 26 | 40 | 60 |
| 27 | 41 | 59 |
| 28 | 42 | 58 |
| 29 | 42 | 58 |
| 30 | 44 | 56 |
Chance of precipitation in September
Nong Khiaw gets around 180 mm of rain over 19.9 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 65% and peaks near 78% on the wettest days. The odds ease toward the end of the month.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 78 | 78 | 77 | 76 | 75 | 74 | 73 | 72 | 71 | 71 | 70 | 69 | 69 | 68 | 67 | 67 | 66 | 65 | 64 | 63 | 62 | 61 | 59 | 58 | 56 | 54 | 52 | 51 | 49 | 47 |
| Rain chance (%) | |
|---|---|
| 1 | 78 |
| 2 | 78 |
| 3 | 77 |
| 4 | 76 |
| 5 | 75 |
| 6 | 74 |
| 7 | 73 |
| 8 | 72 |
| 9 | 71 |
| 10 | 71 |
| 11 | 70 |
| 12 | 69 |
| 13 | 69 |
| 14 | 68 |
| 15 | 67 |
| 16 | 67 |
| 17 | 66 |
| 18 | 65 |
| 19 | 64 |
| 20 | 63 |
| 21 | 62 |
| 22 | 61 |
| 23 | 59 |
| 24 | 58 |
| 25 | 56 |
| 26 | 54 |
| 27 | 52 |
| 28 | 51 |
| 29 | 49 |
| 30 | 47 |
Humidity in September
Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the oppressive band about 84% of days. Sticky, muggy-or-worse air turns up on roughly 97% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 |
| Muggy (%) | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 8 | 9 | 9 | 10 | 11 | 12 | 12 | 13 | 14 | 15 | 17 | 18 | 19 | 20 | 21 | 22 |
| Oppressive (%) | 93 | 93 | 93 | 92 | 92 | 91 | 92 | 91 | 91 | 90 | 91 | 89 | 89 | 89 | 88 | 86 | 86 | 84 | 83 | 81 | 81 | 80 | 78 | 77 | 75 | 73 | 72 | 70 | 69 | 68 |
| Miserable (%) | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 0 | 0 | 1 | 93 | 6 |
| 2 | 0 | 0 | 1 | 93 | 6 |
| 3 | 0 | 0 | 1 | 93 | 6 |
| 4 | 0 | 0 | 2 | 92 | 6 |
| 5 | 0 | 0 | 2 | 92 | 6 |
| 6 | 0 | 0 | 3 | 91 | 6 |
| 7 | 0 | 0 | 3 | 92 | 5 |
| 8 | 0 | 0 | 4 | 91 | 5 |
| 9 | 0 | 0 | 4 | 91 | 5 |
| 10 | 0 | 0 | 5 | 90 | 5 |
| 11 | 0 | 0 | 5 | 91 | 4 |
| 12 | 0 | 1 | 6 | 89 | 4 |
| 13 | 0 | 1 | 6 | 89 | 4 |
| 14 | 0 | 1 | 7 | 89 | 3 |
| 15 | 0 | 1 | 8 | 88 | 3 |
| 16 | 0 | 2 | 9 | 86 | 3 |
| 17 | 0 | 2 | 9 | 86 | 3 |
| 18 | 0 | 3 | 10 | 84 | 3 |
| 19 | 0 | 3 | 11 | 83 | 3 |
| 20 | 0 | 4 | 12 | 81 | 3 |
| 21 | 0 | 4 | 12 | 81 | 3 |
| 22 | 0 | 4 | 13 | 80 | 3 |
| 23 | 0 | 5 | 14 | 78 | 3 |
| 24 | 0 | 5 | 15 | 77 | 3 |
| 25 | 0 | 5 | 17 | 75 | 3 |
| 26 | 0 | 6 | 18 | 73 | 3 |
| 27 | 0 | 6 | 19 | 72 | 3 |
| 28 | 1 | 6 | 20 | 70 | 3 |
| 29 | 1 | 6 | 21 | 69 | 3 |
| 30 | 1 | 6 | 22 | 68 | 3 |
Wind in September
Winds average 3 km/h in September, the calmest month.
Across September, daily wind ranges from about 3 km/h on the calmest days to 3 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 3 | calm |
| 2 | 3 | calm |
| 3 | 3 | calm |
| 4 | 3 | calm |
| 5 | 3 | calm |
| 6 | 3 | calm |
| 7 | 3 | calm |
| 8 | 3 | calm |
| 9 | 3 | calm |
| 10 | 3 | calm |
| 11 | 3 | calm |
| 12 | 3 | calm |
| 13 | 3 | calm |
| 14 | 3 | calm |
| 15 | 3 | calm |
| 16 | 3 | calm |
| 17 | 3 | calm |
| 18 | 3 | calm |
| 19 | 3 | calm |
| 20 | 3 | calm |
| 21 | 3 | calm |
| 22 | 3 | calm |
| 23 | 3 | calm |
| 24 | 3 | calm |
| 25 | 3 | calm |
| 26 | 3 | calm |
| 27 | 3 | calm |
| 28 | 3 | calm |
| 29 | 3 | calm |
| 30 | 3 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 36 minutes over September. Sunrise moves from 5:57 AM to 6:04 AM, and sunset from 6:22 PM to 5:54 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.4 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.8 |
| Sunrise (AM) | 5:57 | 5:57 | 5:57 | 5:58 | 5:58 | 5:58 | 5:58 | 5:59 | 5:59 | 5:59 | 5:59 | 5:59 | 6:00 | 6:00 | 6:00 | 6:00 | 6:01 | 6:01 | 6:01 | 6:01 | 6:02 | 6:02 | 6:02 | 6:02 | 6:03 | 6:03 | 6:03 | 6:03 | 6:04 | 6:04 |
| Sunset (PM) | 6:22 | 6:21 | 6:20 | 6:19 | 6:18 | 6:17 | 6:16 | 6:15 | 6:14 | 6:13 | 6:12 | 6:11 | 6:10 | 6:09 | 6:08 | 6:07 | 6:06 | 6:05 | 6:04 | 6:03 | 6:02 | 6:02 | 6:01 | 6:00 | 5:59 | 5:58 | 5:57 | 5:56 | 5:55 | 5:54 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.4 | 5:57 | 6:22 |
| 2 | 12.4 | 5:57 | 6:21 |
| 3 | 12.4 | 5:57 | 6:20 |
| 4 | 12.4 | 5:58 | 6:19 |
| 5 | 12.3 | 5:58 | 6:18 |
| 6 | 12.3 | 5:58 | 6:17 |
| 7 | 12.3 | 5:58 | 6:16 |
| 8 | 12.3 | 5:59 | 6:15 |
| 9 | 12.3 | 5:59 | 6:14 |
| 10 | 12.2 | 5:59 | 6:13 |
| 11 | 12.2 | 5:59 | 6:12 |
| 12 | 12.2 | 5:59 | 6:11 |
| 13 | 12.2 | 6:00 | 6:10 |
| 14 | 12.2 | 6:00 | 6:09 |
| 15 | 12.1 | 6:00 | 6:08 |
| 16 | 12.1 | 6:00 | 6:07 |
| 17 | 12.1 | 6:01 | 6:06 |
| 18 | 12.1 | 6:01 | 6:05 |
| 19 | 12.1 | 6:01 | 6:04 |
| 20 | 12.0 | 6:01 | 6:03 |
| 21 | 12.0 | 6:02 | 6:02 |
| 22 | 12.0 | 6:02 | 6:02 |
| 23 | 12.0 | 6:02 | 6:01 |
| 24 | 12.0 | 6:02 | 6:00 |
| 25 | 11.9 | 6:03 | 5:59 |
| 26 | 11.9 | 6:03 | 5:58 |
| 27 | 11.9 | 6:03 | 5:57 |
| 28 | 11.9 | 6:03 | 5:56 |
| 29 | 11.9 | 6:04 | 5:55 |
| 30 | 11.8 | 6:04 | 5:54 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.48 kWh/m².
For context, solar energy here swings from a low near 3.92 kWh/m² to a high of 5.82 kWh/m² in April across the year — September's 4.48 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 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 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 |
| 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 |
| 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 | 4.4 | Bright |
| 7 | 4.4 | Bright |
| 8 | 4.4 | Bright |
| 9 | 4.4 | Bright |
| 10 | 4.4 | Bright |
| 11 | 4.4 | Bright |
| 12 | 4.4 | Bright |
| 13 | 4.4 | Bright |
| 14 | 4.5 | Bright |
| 15 | 4.5 | Bright |
| 16 | 4.5 | Bright |
| 17 | 4.5 | Bright |
| 18 | 4.5 | Bright |
| 19 | 4.5 | Bright |
| 20 | 4.5 | Bright |
| 21 | 4.5 | Bright |
| 22 | 4.5 | Bright |
| 23 | 4.5 | Bright |
| 24 | 4.6 | Bright |
| 25 | 4.6 | Bright |
| 26 | 4.6 | Bright |
| 27 | 4.6 | Bright |
| 28 | 4.6 | Bright |
| 29 | 4.6 | Bright |
| 30 | 4.6 | Bright |
Hazard calendar for Nong Khiaw
In September, Nong Khiaw sits inside its monsoon season. The full year is below, with each hazard's peak months called out.
Nong Khiaw's monsoon runs May–September, when most of the year's rain falls.
Is September a good time to visit Nong Khiaw?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a weaker month for outdoor sightseeing in Nong Khiaw.
What to pack for Nong Khiaw in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Nong Khiaw sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. About 20 days see rain.
UV index in Nong Khiaw in September
Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nong Khiaw peaks around June 20 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 | 9 | 11 | 14 | 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 | 9 | Very high |
| May | 11 | Extreme |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Nong Khiaw in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Nong Khiaw is worst in April — around 497 µg/m³ PM2.5 (very unhealthy), about 67.1× the cleanest month (September, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 29 | 231 | 497 | 49 | 9 | 8 | 8 | 7 | 8 | 9 | 10 |
| Level | Moderate | Moderate | Very unhealthy | Very unhealthy | Poor | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 29 | Moderate |
| Mar | 231 | Very unhealthy |
| Apr | 497 | Very unhealthy |
| May | 49 | Poor |
| Jun | 9 | Good |
| Jul | 8 | Good |
| Aug | 8 | Good |
| Sep | 7 | Good |
| Oct | 8 | Good |
| Nov | 9 | Good |
| Dec | 10 | Good |
Where is Nong Khiaw?
Nong Khiaw sits at 20.6°N, 102.6°E, 0 m above sea level, in Laos. The nearest listed city is Muang Xay, 67 km away.
Topography around Nong Khiaw
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nong Khiaw.
Within 3 km, the terrain around Nong Khiaw has very significant variations in elevation — a maximum elevation change of 1,215 m around an average of 609 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,310 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,987 m.
The land around Nong Khiaw is covered by trees (81%) within 3 km, trees (86%) within 16 km, and trees (88%) within 80 km.
Laos travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C / E / F
- 230 V · 50 Hz
- Prices
- ≈ 23% of US
- price level, 2025
- GDP per capita
- $2,325
- 2025
- Happiness
- 5.5 / 10
- World Happiness, 2025
- Safe drinking water
- 35%
- of population, 2024
- Road deaths
- 17.9
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Low
- EF EPI 461
- 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 Nong Khiaw (20.5708°, 102.6112°, elevation 0 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).