Vieng Xai weather in March
In March, Vieng Xai sees average daytime highs of 25°C and overnight lows near 15°C, with 60 mm of rain across 10.6 wet days and about 11.9 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.
Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 34% of the time in March, and the air most often feels humid.
Daylight stretches from about 11 h 36 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is Vieng Xai's 1st-clearest and 1st-windiest month. For the whole year in context, see Vieng Xai's year-round climate.
- Daytime high
- 25°
- 7th warmest
- Overnight low
- 15°
- 5th coldest
- Rainfall
- 60 mm
- 10.6 wet days
- Daylight
- 11 h 54 min
- 6:17 AM – 6:08 PM
- Cloud cover
- 56%
- 1st clearest
- Wind
- 6 km/h
- 1st windiest
- Solar energy
- 4.73 kWh/m²
- Travel score
- 6.8
- out of 10
Temperature in March
Highs climb over the month, from about 24°C in the first days to 26°C by the end.
A typical March day in Vieng Xai reaches about 25°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 31°C. Set against its neighbours, March runs about 3°C warmer than February and about 2°C cooler than April.
| 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) | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 24 | 13 |
| 2 | 24 | 13 |
| 3 | 24 | 14 |
| 4 | 25 | 14 |
| 5 | 25 | 14 |
| 6 | 25 | 14 |
| 7 | 25 | 14 |
| 8 | 25 | 14 |
| 9 | 25 | 14 |
| 10 | 25 | 14 |
| 11 | 25 | 14 |
| 12 | 25 | 14 |
| 13 | 26 | 15 |
| 14 | 26 | 15 |
| 15 | 26 | 15 |
| 16 | 26 | 15 |
| 17 | 26 | 15 |
| 18 | 26 | 15 |
| 19 | 26 | 15 |
| 20 | 26 | 15 |
| 21 | 26 | 16 |
| 22 | 26 | 16 |
| 23 | 26 | 16 |
| 24 | 26 | 16 |
| 25 | 26 | 16 |
| 26 | 26 | 16 |
| 27 | 26 | 16 |
| 28 | 26 | 16 |
| 29 | 26 | 16 |
| 30 | 26 | 16 |
| 31 | 26 | 16 |
How March really feels in Vieng Xai
Once humidity and wind are folded in, March 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.
March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Vieng Xai weather by month
How March compares with the rest of the year at a glance. March is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 20° / 11° | 22 | 4.4 | 10.9 | 7.0 |
| Feb | 22° / 12° | 14 | 3.8 | 11.3 | 7.6 |
| Mar | 25° / 15° | 60 | 10.6 | 11.9 | 6.8 |
| Apr | 28° / 18° | 109 | 17.7 | 12.5 | 5.1 |
| May | 29° / 20° | 205 | 23.2 | 13 | 3.7 |
| Jun | 29° / 22° | 201 | 24.2 | 13.2 | 3.2 |
| Jul | 29° / 22° | 264 | 26.2 | 13.1 | 3.3 |
| Aug | 28° / 21° | 302 | 26.8 | 12.7 | 3.6 |
| Sep | 27° / 20° | 193 | 20.1 | 12.1 | 4.7 |
| Oct | 25° / 18° | 91 | 14.2 | 11.5 | 6.1 |
| Nov | 23° / 15° | 32 | 6.3 | 11 | 7.3 |
| Dec | 20° / 11° | 19 | 4.2 | 10.8 | 7.1 |
Cloud cover in March
The sky is clear or mostly clear about 34% of the time in March, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 18% of March, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over 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 (%) | 59 | 58 | 58 | 59 | 59 | 58 | 58 | 58 | 58 | 57 | 57 | 55 | 55 | 54 | 53 | 52 | 51 | 51 | 49 | 49 | 48 | 47 | 48 | 47 | 46 | 45 | 46 | 45 | 45 | 45 | 45 |
| Cloudier (%) | 41 | 42 | 42 | 41 | 41 | 42 | 42 | 42 | 42 | 43 | 43 | 45 | 45 | 46 | 47 | 48 | 49 | 49 | 51 | 51 | 52 | 53 | 52 | 53 | 54 | 55 | 54 | 55 | 55 | 55 | 55 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 59 | 41 |
| 2 | 58 | 42 |
| 3 | 58 | 42 |
| 4 | 59 | 41 |
| 5 | 59 | 41 |
| 6 | 58 | 42 |
| 7 | 58 | 42 |
| 8 | 58 | 42 |
| 9 | 58 | 42 |
| 10 | 57 | 43 |
| 11 | 57 | 43 |
| 12 | 55 | 45 |
| 13 | 55 | 45 |
| 14 | 54 | 46 |
| 15 | 53 | 47 |
| 16 | 52 | 48 |
| 17 | 51 | 49 |
| 18 | 51 | 49 |
| 19 | 49 | 51 |
| 20 | 49 | 51 |
| 21 | 48 | 52 |
| 22 | 47 | 53 |
| 23 | 48 | 52 |
| 24 | 47 | 53 |
| 25 | 46 | 54 |
| 26 | 45 | 55 |
| 27 | 46 | 54 |
| 28 | 45 | 55 |
| 29 | 45 | 55 |
| 30 | 45 | 55 |
| 31 | 45 | 55 |
Chance of precipitation in March
Vieng Xai gets around 60 mm of rain over 10.6 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 34% and peaks near 50% on the wettest days. The odds climb 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 18 | 18 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 27 | 28 | 29 | 31 | 33 | 34 | 36 | 38 | 40 | 41 | 43 | 44 | 46 | 47 | 48 | 48 | 49 | 50 | 50 | 50 |
| Rain chance (%) | |
|---|---|
| 1 | 18 |
| 2 | 18 |
| 3 | 18 |
| 4 | 19 |
| 5 | 19 |
| 6 | 20 |
| 7 | 21 |
| 8 | 22 |
| 9 | 23 |
| 10 | 24 |
| 11 | 25 |
| 12 | 27 |
| 13 | 28 |
| 14 | 29 |
| 15 | 31 |
| 16 | 33 |
| 17 | 34 |
| 18 | 36 |
| 19 | 38 |
| 20 | 40 |
| 21 | 41 |
| 22 | 43 |
| 23 | 44 |
| 24 | 46 |
| 25 | 47 |
| 26 | 48 |
| 27 | 48 |
| 28 | 49 |
| 29 | 50 |
| 30 | 50 |
| 31 | 50 |
Humidity in March
Most of March feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the humid band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 10% 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 (%) | 35 | 34 | 33 | 32 | 31 | 30 | 28 | 26 | 25 | 23 | 21 | 19 | 18 | 16 | 15 | 14 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 8 |
| Comfortable (%) | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 37 | 37 | 36 | 35 | 34 | 33 | 32 | 30 | 29 | 27 | 25 | 24 | 22 | 21 | 20 | 19 | 18 | 17 | 17 | 16 |
| Humid (%) | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 34 | 35 | 37 | 38 | 40 | 41 | 42 | 44 | 45 | 46 | 47 | 48 | 49 | 51 | 51 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 51 |
| Muggy (%) | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 7 | 8 | 8 | 9 | 10 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 18 | 19 | 20 | 22 | 23 | 25 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 35 | 38 | 25 | 2 |
| 2 | 34 | 38 | 26 | 2 |
| 3 | 33 | 38 | 27 | 2 |
| 4 | 32 | 38 | 28 | 3 |
| 5 | 31 | 38 | 29 | 3 |
| 6 | 30 | 38 | 30 | 3 |
| 7 | 28 | 38 | 31 | 3 |
| 8 | 26 | 38 | 32 | 3 |
| 9 | 25 | 38 | 34 | 4 |
| 10 | 23 | 38 | 35 | 4 |
| 11 | 21 | 38 | 37 | 5 |
| 12 | 19 | 37 | 38 | 5 |
| 13 | 18 | 37 | 40 | 6 |
| 14 | 16 | 36 | 41 | 7 |
| 15 | 15 | 35 | 42 | 8 |
| 16 | 14 | 34 | 44 | 8 |
| 17 | 13 | 33 | 45 | 9 |
| 18 | 12 | 32 | 46 | 10 |
| 19 | 12 | 30 | 47 | 10 |
| 20 | 12 | 29 | 48 | 11 |
| 21 | 12 | 27 | 49 | 12 |
| 22 | 11 | 25 | 51 | 13 |
| 23 | 11 | 24 | 51 | 14 |
| 24 | 11 | 22 | 52 | 15 |
| 25 | 11 | 21 | 52 | 16 |
| 26 | 10 | 20 | 52 | 18 |
| 27 | 10 | 19 | 52 | 19 |
| 28 | 10 | 18 | 52 | 20 |
| 29 | 9 | 17 | 52 | 22 |
| 30 | 9 | 17 | 51 | 23 |
| 31 | 8 | 16 | 51 | 25 |
Wind in March
Winds average 6 km/h in March, the windiest month of the year.
Across March, daily wind ranges from about 6 km/h on the calmest days to 6 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) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 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 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in March
Daylight runs from about 11 h 36 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 36 minutes over March. Sunrise moves from 6:29 AM to 6:03 AM, and sunset from 6:03 PM to 6:13 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) | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 |
| Sunrise (AM) | 6:29 | 6:29 | 6:28 | 6:27 | 6:26 | 6:26 | 6:25 | 6:24 | 6:23 | 6:22 | 6:21 | 6:21 | 6:20 | 6:19 | 6:18 | 6:17 | 6:16 | 6:15 | 6:14 | 6:14 | 6:13 | 6:12 | 6:11 | 6:10 | 6:09 | 6:08 | 6:07 | 6:06 | 6:05 | 6:04 | 6:03 |
| Sunset (PM) | 6:03 | 6:04 | 6:04 | 6:04 | 6:05 | 6:05 | 6:05 | 6:06 | 6:06 | 6:06 | 6:07 | 6:07 | 6:07 | 6:08 | 6:08 | 6:08 | 6:09 | 6:09 | 6:09 | 6:10 | 6:10 | 6:10 | 6:10 | 6:11 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:12 | 6:13 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 6:29 | 6:03 |
| 2 | 11.6 | 6:29 | 6:04 |
| 3 | 11.6 | 6:28 | 6:04 |
| 4 | 11.6 | 6:27 | 6:04 |
| 5 | 11.6 | 6:26 | 6:05 |
| 6 | 11.7 | 6:26 | 6:05 |
| 7 | 11.7 | 6:25 | 6:05 |
| 8 | 11.7 | 6:24 | 6:06 |
| 9 | 11.7 | 6:23 | 6:06 |
| 10 | 11.7 | 6:22 | 6:06 |
| 11 | 11.8 | 6:21 | 6:07 |
| 12 | 11.8 | 6:21 | 6:07 |
| 13 | 11.8 | 6:20 | 6:07 |
| 14 | 11.8 | 6:19 | 6:08 |
| 15 | 11.8 | 6:18 | 6:08 |
| 16 | 11.9 | 6:17 | 6:08 |
| 17 | 11.9 | 6:16 | 6:09 |
| 18 | 11.9 | 6:15 | 6:09 |
| 19 | 11.9 | 6:14 | 6:09 |
| 20 | 11.9 | 6:14 | 6:10 |
| 21 | 12.0 | 6:13 | 6:10 |
| 22 | 12.0 | 6:12 | 6:10 |
| 23 | 12.0 | 6:11 | 6:10 |
| 24 | 12.0 | 6:10 | 6:11 |
| 25 | 12.0 | 6:09 | 6:11 |
| 26 | 12.1 | 6:08 | 6:11 |
| 27 | 12.1 | 6:07 | 6:12 |
| 28 | 12.1 | 6:06 | 6:12 |
| 29 | 12.1 | 6:05 | 6:12 |
| 30 | 12.1 | 6:04 | 6:12 |
| 31 | 12.2 | 6:03 | 6:13 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 4.73 kWh/m².
For context, solar energy here swings from a low near 3.16 kWh/m² to a high of 5.2 kWh/m² in April across the year — March's 4.73 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) | 4.4 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 |
| 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 | 4.4 | Bright |
| 2 | 4.5 | Bright |
| 3 | 4.5 | Bright |
| 4 | 4.5 | Bright |
| 5 | 4.6 | Bright |
| 6 | 4.6 | Bright |
| 7 | 4.6 | Bright |
| 8 | 4.6 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.7 | Bright |
| 12 | 4.7 | Bright |
| 13 | 4.7 | Bright |
| 14 | 4.7 | Bright |
| 15 | 4.7 | Bright |
| 16 | 4.8 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.8 | Bright |
| 20 | 4.8 | Bright |
| 21 | 4.8 | Bright |
| 22 | 4.8 | Bright |
| 23 | 4.8 | Bright |
| 24 | 4.8 | Bright |
| 25 | 4.8 | Bright |
| 26 | 4.8 | Bright |
| 27 | 4.8 | Bright |
| 28 | 4.8 | Bright |
| 29 | 4.8 | Bright |
| 30 | 4.8 | Bright |
| 31 | 4.9 | Bright |
Hazard calendar for Vieng Xai
None of Vieng Xai's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Vieng Xai's monsoon runs May–September, when most of the year's rain falls.
Is March a good time to visit Vieng Xai?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is a reasonable time to visit Vieng Xai for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Vieng Xai in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Vieng Xai sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.
UV index in Vieng Xai in March
Clear-sky midday UV in March peaks 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 Vieng Xai peaks around August 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 | 10 | 9 | 10 | 14 | 13 | 14 | 10 | 9 | 8 | 7 |
| Level | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 9 | Very high |
| Mar | 10 | Very high |
| Apr | 9 | Very high |
| May | 10 | Extreme |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 14 | Extreme |
| Sep | 10 | Very high |
| Oct | 9 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Vieng Xai in March
Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.
Air quality in Vieng Xai is worst in April — around 288 µg/m³ PM2.5 (very unhealthy), about 35.5× the cleanest month (August, 8 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) | 20 | 28 | 98 | 288 | 64 | 14 | 9 | 8 | 11 | 15 | 15 | 19 |
| Level | Moderate | Moderate | Unhealthy | Very unhealthy | Unhealthy | Moderate | Good | Good | Good | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 28 | Moderate |
| Mar | 98 | Unhealthy |
| Apr | 288 | Very unhealthy |
| May | 64 | Unhealthy |
| Jun | 14 | Moderate |
| Jul | 9 | Good |
| Aug | 8 | Good |
| Sep | 11 | Good |
| Oct | 15 | Moderate |
| Nov | 15 | Moderate |
| Dec | 19 | Moderate |
Where is Vieng Xai?
Vieng Xai sits at 20.4°N, 104.2°E, 0 m above sea level, in Laos. The nearest listed city is Xam Nua, 19 km away.
Topography around Vieng Xai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Vieng Xai.
Within 3 km, the terrain around Vieng Xai has large variations in elevation — a maximum elevation change of 661 m around an average of 915 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,259 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,998 m.
The land around Vieng Xai is covered by trees (65%) and grassland (25%) within 3 km, trees (86%) within 16 km, and trees (82%) 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 Vieng Xai (20.4068°, 104.2238°, 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).