Vieng Xai weather in October
In October, Vieng Xai sees average daytime highs of 25°C and overnight lows near 18°C, with 91 mm of rain across 14.2 wet days and about 11.5 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.
Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 18% of the time in October, and the air most often feels muggy.
Daylight stretches from about 11 h 48 min at the start of October to 11 h 18 min by month's end. Set against the rest of the year, October is Vieng Xai's 7th-clearest and 10th-windiest month. For the whole year in context, see Vieng Xai's year-round climate.
- Daytime high
- 25°
- 8th warmest
- Overnight low
- 18°
- 6th coldest
- Rainfall
- 91 mm
- 14.2 wet days
- Daylight
- 11 h 30 min
- 6:02 AM – 5:34 PM
- Cloud cover
- 67%
- 7th clearest
- Wind
- 5 km/h
- 10th windiest
- Solar energy
- 3.8 kWh/m²
- Travel score
- 6.1
- out of 10
Temperature in October
Highs ease over the month, from about 26°C in the first days to 24°C by the end.
A typical October day in Vieng Xai reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°C. Set against its neighbours, October runs about 2°C cooler than September and about 2°C warmer than November.
| 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) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 19 |
| 2 | 26 | 19 |
| 3 | 26 | 19 |
| 4 | 26 | 19 |
| 5 | 26 | 19 |
| 6 | 26 | 19 |
| 7 | 26 | 19 |
| 8 | 26 | 19 |
| 9 | 26 | 18 |
| 10 | 26 | 18 |
| 11 | 26 | 18 |
| 12 | 25 | 18 |
| 13 | 25 | 18 |
| 14 | 25 | 18 |
| 15 | 25 | 18 |
| 16 | 25 | 18 |
| 17 | 25 | 18 |
| 18 | 25 | 18 |
| 19 | 25 | 18 |
| 20 | 25 | 17 |
| 21 | 25 | 17 |
| 22 | 25 | 17 |
| 23 | 24 | 17 |
| 24 | 24 | 17 |
| 25 | 24 | 17 |
| 26 | 24 | 17 |
| 27 | 24 | 17 |
| 28 | 24 | 16 |
| 29 | 24 | 16 |
| 30 | 24 | 16 |
| 31 | 24 | 16 |
How October really feels in Vieng Xai
Once humidity and wind are folded in, October 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.
October 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 October compares with the rest of the year at a glance. October is the 8th-warmest and 7th-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 October
The sky is clear or mostly clear about 18% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 22% of October, with mostly cloudy or overcast conditions the remaining 60%. 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 (%) | 37 | 37 | 37 | 37 | 38 | 36 | 37 | 37 | 37 | 36 | 36 | 36 | 37 | 38 | 38 | 39 | 39 | 40 | 41 | 41 | 42 | 43 | 42 | 43 | 43 | 44 | 44 | 45 | 45 | 46 | 46 |
| Cloudier (%) | 63 | 63 | 63 | 63 | 62 | 64 | 63 | 63 | 63 | 64 | 64 | 64 | 63 | 62 | 62 | 61 | 61 | 60 | 59 | 59 | 58 | 57 | 58 | 57 | 57 | 56 | 56 | 55 | 55 | 54 | 54 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 37 | 63 |
| 2 | 37 | 63 |
| 3 | 37 | 63 |
| 4 | 37 | 63 |
| 5 | 38 | 62 |
| 6 | 36 | 64 |
| 7 | 37 | 63 |
| 8 | 37 | 63 |
| 9 | 37 | 63 |
| 10 | 36 | 64 |
| 11 | 36 | 64 |
| 12 | 36 | 64 |
| 13 | 37 | 63 |
| 14 | 38 | 62 |
| 15 | 38 | 62 |
| 16 | 39 | 61 |
| 17 | 39 | 61 |
| 18 | 40 | 60 |
| 19 | 41 | 59 |
| 20 | 41 | 59 |
| 21 | 42 | 58 |
| 22 | 43 | 57 |
| 23 | 42 | 58 |
| 24 | 43 | 57 |
| 25 | 43 | 57 |
| 26 | 44 | 56 |
| 27 | 44 | 56 |
| 28 | 45 | 55 |
| 29 | 45 | 55 |
| 30 | 46 | 54 |
| 31 | 46 | 54 |
Chance of precipitation in October
Vieng Xai gets around 91 mm of rain over 14.2 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 45% and peaks near 55% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 55 | 55 | 54 | 54 | 54 | 53 | 53 | 53 | 52 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 34 | 33 | 32 |
| Rain chance (%) | |
|---|---|
| 1 | 55 |
| 2 | 55 |
| 3 | 54 |
| 4 | 54 |
| 5 | 54 |
| 6 | 53 |
| 7 | 53 |
| 8 | 53 |
| 9 | 52 |
| 10 | 52 |
| 11 | 51 |
| 12 | 50 |
| 13 | 49 |
| 14 | 48 |
| 15 | 47 |
| 16 | 46 |
| 17 | 45 |
| 18 | 44 |
| 19 | 43 |
| 20 | 42 |
| 21 | 41 |
| 22 | 40 |
| 23 | 39 |
| 24 | 38 |
| 25 | 37 |
| 26 | 36 |
| 27 | 35 |
| 28 | 34 |
| 29 | 34 |
| 30 | 33 |
| 31 | 32 |
Humidity in October
Most of October feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the muggy band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 51% 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 (%) | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 8 | 9 | 10 | 12 | 14 | 15 | 17 | 18 |
| Comfortable (%) | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 19 |
| Humid (%) | 21 | 22 | 22 | 23 | 23 | 24 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 30 | 32 | 32 | 33 | 34 | 34 | 35 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 35 | 35 | 35 | 34 |
| Muggy (%) | 60 | 60 | 61 | 61 | 61 | 59 | 60 | 59 | 58 | 57 | 57 | 55 | 54 | 52 | 51 | 50 | 49 | 47 | 46 | 45 | 43 | 42 | 40 | 38 | 37 | 35 | 34 | 32 | 31 | 29 | 28 |
| Oppressive (%) | 10 | 9 | 8 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 1 | 8 | 21 | 60 | 10 |
| 2 | 1 | 8 | 22 | 60 | 9 |
| 3 | 1 | 8 | 22 | 61 | 8 |
| 4 | 1 | 8 | 23 | 61 | 7 |
| 5 | 1 | 9 | 23 | 61 | 6 |
| 6 | 2 | 9 | 24 | 59 | 6 |
| 7 | 2 | 9 | 24 | 60 | 5 |
| 8 | 2 | 9 | 25 | 59 | 5 |
| 9 | 2 | 10 | 26 | 58 | 4 |
| 10 | 2 | 10 | 27 | 57 | 4 |
| 11 | 2 | 10 | 28 | 57 | 3 |
| 12 | 2 | 11 | 29 | 55 | 3 |
| 13 | 2 | 11 | 30 | 54 | 3 |
| 14 | 3 | 12 | 30 | 52 | 3 |
| 15 | 3 | 12 | 32 | 51 | 2 |
| 16 | 3 | 13 | 32 | 50 | 2 |
| 17 | 3 | 13 | 33 | 49 | 2 |
| 18 | 3 | 14 | 34 | 47 | 2 |
| 19 | 4 | 14 | 34 | 46 | 2 |
| 20 | 4 | 15 | 35 | 45 | 2 |
| 21 | 5 | 15 | 36 | 43 | 1 |
| 22 | 5 | 16 | 36 | 42 | 1 |
| 23 | 6 | 16 | 36 | 40 | 1 |
| 24 | 8 | 17 | 36 | 38 | 1 |
| 25 | 9 | 17 | 36 | 37 | 1 |
| 26 | 10 | 17 | 36 | 35 | 1 |
| 27 | 12 | 18 | 36 | 34 | 1 |
| 28 | 14 | 18 | 35 | 32 | 1 |
| 29 | 15 | 19 | 35 | 31 | 1 |
| 30 | 17 | 19 | 35 | 29 | 0 |
| 31 | 18 | 19 | 34 | 28 | 0 |
Wind in October
Winds average 5 km/h in October.
Across October, daily wind ranges from about 5 km/h on the calmest days to 5 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) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 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 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in October
Daylight runs from about 11 h 48 min at the start of October to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 30 minutes over October. Sunrise moves from 5:58 AM to 6:09 AM, and sunset from 5:47 PM to 5:24 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) | 11.8 | 11.8 | 11.8 | 11.8 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 |
| Sunrise (AM) | 5:58 | 5:58 | 5:58 | 5:58 | 5:59 | 5:59 | 5:59 | 6:00 | 6:00 | 6:00 | 6:01 | 6:01 | 6:01 | 6:02 | 6:02 | 6:02 | 6:03 | 6:03 | 6:04 | 6:04 | 6:04 | 6:05 | 6:05 | 6:06 | 6:06 | 6:07 | 6:07 | 6:08 | 6:08 | 6:08 | 6:09 |
| Sunset (PM) | 5:47 | 5:46 | 5:45 | 5:44 | 5:43 | 5:42 | 5:41 | 5:40 | 5:39 | 5:39 | 5:38 | 5:37 | 5:36 | 5:35 | 5:35 | 5:34 | 5:33 | 5:32 | 5:32 | 5:31 | 5:30 | 5:30 | 5:29 | 5:28 | 5:28 | 5:27 | 5:26 | 5:26 | 5:25 | 5:25 | 5:24 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.8 | 5:58 | 5:47 |
| 2 | 11.8 | 5:58 | 5:46 |
| 3 | 11.8 | 5:58 | 5:45 |
| 4 | 11.8 | 5:58 | 5:44 |
| 5 | 11.7 | 5:59 | 5:43 |
| 6 | 11.7 | 5:59 | 5:42 |
| 7 | 11.7 | 5:59 | 5:41 |
| 8 | 11.7 | 6:00 | 5:40 |
| 9 | 11.7 | 6:00 | 5:39 |
| 10 | 11.6 | 6:00 | 5:39 |
| 11 | 11.6 | 6:01 | 5:38 |
| 12 | 11.6 | 6:01 | 5:37 |
| 13 | 11.6 | 6:01 | 5:36 |
| 14 | 11.6 | 6:02 | 5:35 |
| 15 | 11.5 | 6:02 | 5:35 |
| 16 | 11.5 | 6:02 | 5:34 |
| 17 | 11.5 | 6:03 | 5:33 |
| 18 | 11.5 | 6:03 | 5:32 |
| 19 | 11.5 | 6:04 | 5:32 |
| 20 | 11.4 | 6:04 | 5:31 |
| 21 | 11.4 | 6:04 | 5:30 |
| 22 | 11.4 | 6:05 | 5:30 |
| 23 | 11.4 | 6:05 | 5:29 |
| 24 | 11.4 | 6:06 | 5:28 |
| 25 | 11.4 | 6:06 | 5:28 |
| 26 | 11.3 | 6:07 | 5:27 |
| 27 | 11.3 | 6:07 | 5:26 |
| 28 | 11.3 | 6:08 | 5:26 |
| 29 | 11.3 | 6:08 | 5:25 |
| 30 | 11.3 | 6:08 | 5:25 |
| 31 | 11.3 | 6:09 | 5:24 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 3.8 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 — October's 3.8 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) | 4.2 | 4.1 | 4.1 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 | 3.7 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.2 | Bright |
| 2 | 4.1 | Bright |
| 3 | 4.1 | Bright |
| 4 | 4.1 | Bright |
| 5 | 4.1 | Bright |
| 6 | 4.0 | Bright |
| 7 | 4.0 | Bright |
| 8 | 4.0 | Moderate |
| 9 | 4.0 | Moderate |
| 10 | 3.9 | Moderate |
| 11 | 3.9 | Moderate |
| 12 | 3.9 | Moderate |
| 13 | 3.8 | Moderate |
| 14 | 3.8 | Moderate |
| 15 | 3.8 | Moderate |
| 16 | 3.8 | Moderate |
| 17 | 3.8 | Moderate |
| 18 | 3.7 | Moderate |
| 19 | 3.7 | Moderate |
| 20 | 3.7 | Moderate |
| 21 | 3.7 | Moderate |
| 22 | 3.7 | Moderate |
| 23 | 3.7 | Moderate |
| 24 | 3.7 | Moderate |
| 25 | 3.7 | Moderate |
| 26 | 3.7 | Moderate |
| 27 | 3.7 | Moderate |
| 28 | 3.7 | Moderate |
| 29 | 3.7 | Moderate |
| 30 | 3.7 | Moderate |
| 31 | 3.7 | Moderate |
Hazard calendar for Vieng Xai
None of Vieng Xai's seasonal hazards are active in October. 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 October a good time to visit Vieng Xai?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a reasonable time to visit Vieng Xai for sightseeing.
What to pack for Vieng Xai in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Vieng Xai sees daytime highs around 25°C and nights near 18°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.
UV index in Vieng Xai in October
Clear-sky midday UV in October peaks around 9 (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 October
Average fine-particle pollution (PM2.5) through the year — so you can see where October 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).