Sơn La weather in March
In March, Sơn La sees average daytime highs of 27°C and overnight lows near 16°C, with 50 mm of rain across 7.1 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.
Highs climb over the month, from about 26°C in the first days to 27°C by the end. The sky is clear or mostly clear about 41% of the time in March, and the air most often feels humid.
Daylight stretches from about 11 h 30 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is Sơn La's 1st-clearest and 2nd-windiest month. For the whole year in context, see Sơn La's year-round climate.
- Daytime high
- 27°
- 8th warmest
- Overnight low
- 16°
- 5th coldest
- Rainfall
- 50 mm
- 7.1 wet days
- Daylight
- 11 h 48 min
- 6:19 AM – 6:09 PM
- Cloud cover
- 50%
- 1st clearest
- Wind
- 6 km/h
- 2nd windiest
- Solar energy
- 4.77 kWh/m²
- Travel score
- 7.1
- out of 10
Sơn La is the old provincial capital of Son La province, Vietnam.
- Density
- 328/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Highs climb over the month, from about 26°C in the first days to 27°C by the end.
A typical March day in Sơn La reaches about 27°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 32°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) | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 |
| Avg low (°C) | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 14 |
| 2 | 25 | 14 |
| 3 | 26 | 15 |
| 4 | 26 | 15 |
| 5 | 26 | 15 |
| 6 | 26 | 15 |
| 7 | 26 | 15 |
| 8 | 26 | 15 |
| 9 | 26 | 15 |
| 10 | 27 | 15 |
| 11 | 27 | 16 |
| 12 | 27 | 16 |
| 13 | 27 | 16 |
| 14 | 27 | 16 |
| 15 | 27 | 16 |
| 16 | 27 | 16 |
| 17 | 27 | 16 |
| 18 | 27 | 16 |
| 19 | 27 | 16 |
| 20 | 27 | 17 |
| 21 | 27 | 17 |
| 22 | 27 | 17 |
| 23 | 27 | 17 |
| 24 | 27 | 17 |
| 25 | 27 | 17 |
| 26 | 27 | 17 |
| 27 | 27 | 17 |
| 28 | 27 | 17 |
| 29 | 28 | 18 |
| 30 | 28 | 18 |
| 31 | 28 | 18 |
How March really feels in Sơn La
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.
Sơn La weather by month
How March compares with the rest of the year at a glance. March 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 | 21° / 12° | 24 | 4 | 10.8 | 7.3 |
| Feb | 23° / 13° | 19 | 3.6 | 11.3 | 7.9 |
| Mar | 27° / 16° | 50 | 7.1 | 11.8 | 7.1 |
| Apr | 29° / 19° | 72 | 12.8 | 12.5 | 5.2 |
| May | 30° / 22° | 147 | 19.3 | 13 | 3.7 |
| Jun | 30° / 23° | 209 | 23 | 13.3 | 3.2 |
| Jul | 29° / 23° | 288 | 24.5 | 13.2 | 3.4 |
| Aug | 29° / 22° | 283 | 25.3 | 12.7 | 3.4 |
| Sep | 29° / 21° | 150 | 17.5 | 12.1 | 4.4 |
| Oct | 27° / 19° | 49 | 8.3 | 11.5 | 6.6 |
| Nov | 25° / 16° | 27 | 4.5 | 11 | 7.8 |
| Dec | 22° / 12° | 23 | 3.6 | 10.7 | 7.6 |
Cloud cover in March
The sky is clear or mostly clear about 41% of the time in March, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 20% of March, with mostly cloudy or overcast conditions the remaining 39%. 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 (%) | 66 | 66 | 67 | 67 | 67 | 67 | 67 | 67 | 66 | 66 | 66 | 66 | 64 | 63 | 63 | 61 | 60 | 59 | 59 | 58 | 57 | 56 | 55 | 54 | 54 | 54 | 53 | 53 | 53 | 54 | 54 |
| Cloudier (%) | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 36 | 37 | 37 | 39 | 40 | 41 | 41 | 42 | 43 | 44 | 45 | 46 | 46 | 46 | 47 | 47 | 47 | 46 | 46 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 66 | 34 |
| 2 | 66 | 34 |
| 3 | 67 | 33 |
| 4 | 67 | 33 |
| 5 | 67 | 33 |
| 6 | 67 | 33 |
| 7 | 67 | 33 |
| 8 | 67 | 33 |
| 9 | 66 | 34 |
| 10 | 66 | 34 |
| 11 | 66 | 34 |
| 12 | 66 | 34 |
| 13 | 64 | 36 |
| 14 | 63 | 37 |
| 15 | 63 | 37 |
| 16 | 61 | 39 |
| 17 | 60 | 40 |
| 18 | 59 | 41 |
| 19 | 59 | 41 |
| 20 | 58 | 42 |
| 21 | 57 | 43 |
| 22 | 56 | 44 |
| 23 | 55 | 45 |
| 24 | 54 | 46 |
| 25 | 54 | 46 |
| 26 | 54 | 46 |
| 27 | 53 | 47 |
| 28 | 53 | 47 |
| 29 | 53 | 47 |
| 30 | 54 | 46 |
| 31 | 54 | 46 |
Chance of precipitation in March
Sơn La gets around 50 mm of rain over 7.1 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 23% and peaks near 35% 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 (%) | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 33 | 34 | 34 | 35 | 35 |
| Rain chance (%) | |
|---|---|
| 1 | 13 |
| 2 | 14 |
| 3 | 14 |
| 4 | 14 |
| 5 | 14 |
| 6 | 14 |
| 7 | 14 |
| 8 | 15 |
| 9 | 15 |
| 10 | 16 |
| 11 | 17 |
| 12 | 18 |
| 13 | 19 |
| 14 | 20 |
| 15 | 21 |
| 16 | 22 |
| 17 | 23 |
| 18 | 25 |
| 19 | 26 |
| 20 | 27 |
| 21 | 28 |
| 22 | 29 |
| 23 | 30 |
| 24 | 31 |
| 25 | 32 |
| 26 | 33 |
| 27 | 33 |
| 28 | 34 |
| 29 | 34 |
| 30 | 35 |
| 31 | 35 |
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 40% of days. Sticky, muggy-or-worse air turns up on roughly 15% 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 (%) | 36 | 35 | 34 | 33 | 32 | 31 | 30 | 28 | 26 | 25 | 23 | 22 | 20 | 18 | 17 | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 10 | 10 | 9 | 9 | 8 | 8 |
| Comfortable (%) | 34 | 34 | 33 | 33 | 32 | 32 | 32 | 32 | 31 | 31 | 30 | 30 | 30 | 29 | 28 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 19 | 18 | 18 | 17 | 17 | 16 |
| Humid (%) | 26 | 27 | 28 | 29 | 31 | 32 | 33 | 35 | 36 | 38 | 39 | 40 | 41 | 42 | 43 | 43 | 44 | 45 | 45 | 45 | 45 | 46 | 45 | 45 | 45 | 44 | 44 | 43 | 43 | 42 | 41 |
| Muggy (%) | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 8 | 8 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 19 | 20 | 22 | 23 | 25 | 26 | 28 | 29 | 31 | 32 | 34 |
| Oppressive (%) | 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 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 36 | 34 | 26 | 4 | 0 |
| 2 | 35 | 34 | 27 | 4 | 0 |
| 3 | 34 | 33 | 28 | 4 | 0 |
| 4 | 33 | 33 | 29 | 4 | 0 |
| 5 | 32 | 32 | 31 | 5 | 0 |
| 6 | 31 | 32 | 32 | 5 | 0 |
| 7 | 30 | 32 | 33 | 5 | 0 |
| 8 | 28 | 32 | 35 | 6 | 0 |
| 9 | 26 | 31 | 36 | 6 | 0 |
| 10 | 25 | 31 | 38 | 7 | 0 |
| 11 | 23 | 30 | 39 | 8 | 0 |
| 12 | 22 | 30 | 40 | 8 | 0 |
| 13 | 20 | 30 | 41 | 10 | 0 |
| 14 | 18 | 29 | 42 | 11 | 0 |
| 15 | 17 | 28 | 43 | 12 | 0 |
| 16 | 16 | 28 | 43 | 13 | 0 |
| 17 | 15 | 27 | 44 | 14 | 0 |
| 18 | 14 | 26 | 45 | 15 | 0 |
| 19 | 14 | 25 | 45 | 16 | 0 |
| 20 | 13 | 24 | 45 | 17 | 0 |
| 21 | 13 | 23 | 45 | 19 | 0 |
| 22 | 12 | 22 | 46 | 20 | 0 |
| 23 | 12 | 21 | 45 | 22 | 0 |
| 24 | 11 | 20 | 45 | 23 | 0 |
| 25 | 11 | 19 | 45 | 25 | 1 |
| 26 | 10 | 19 | 44 | 26 | 1 |
| 27 | 10 | 18 | 44 | 28 | 1 |
| 28 | 9 | 18 | 43 | 29 | 1 |
| 29 | 9 | 17 | 43 | 31 | 1 |
| 30 | 8 | 17 | 42 | 32 | 1 |
| 31 | 8 | 16 | 41 | 34 | 1 |
Wind in March
Winds average 6 km/h in March.
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 30 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 42 minutes over March. Sunrise moves from 6:31 AM to 6:04 AM, and sunset from 6:04 PM to 6:14 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) | 11.5 | 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 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 |
| Sunrise (AM) | 6:31 | 6:31 | 6:30 | 6:29 | 6:28 | 6:27 | 6:26 | 6:26 | 6:25 | 6:24 | 6:23 | 6:22 | 6:21 | 6:20 | 6:19 | 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 |
| Sunset (PM) | 6:04 | 6:04 | 6:05 | 6:05 | 6:05 | 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 | 6:11 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:13 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.5 | 6:31 | 6:04 |
| 2 | 11.6 | 6:31 | 6:04 |
| 3 | 11.6 | 6:30 | 6:05 |
| 4 | 11.6 | 6:29 | 6:05 |
| 5 | 11.6 | 6:28 | 6:05 |
| 6 | 11.6 | 6:27 | 6:06 |
| 7 | 11.7 | 6:26 | 6:06 |
| 8 | 11.7 | 6:26 | 6:07 |
| 9 | 11.7 | 6:25 | 6:07 |
| 10 | 11.7 | 6:24 | 6:07 |
| 11 | 11.7 | 6:23 | 6:08 |
| 12 | 11.8 | 6:22 | 6:08 |
| 13 | 11.8 | 6:21 | 6:08 |
| 14 | 11.8 | 6:20 | 6:09 |
| 15 | 11.8 | 6:19 | 6:09 |
| 16 | 11.8 | 6:19 | 6:09 |
| 17 | 11.9 | 6:18 | 6:10 |
| 18 | 11.9 | 6:17 | 6:10 |
| 19 | 11.9 | 6:16 | 6:10 |
| 20 | 11.9 | 6:15 | 6:11 |
| 21 | 12.0 | 6:14 | 6:11 |
| 22 | 12.0 | 6:13 | 6:11 |
| 23 | 12.0 | 6:12 | 6:12 |
| 24 | 12.0 | 6:11 | 6:12 |
| 25 | 12.0 | 6:10 | 6:12 |
| 26 | 12.1 | 6:09 | 6:13 |
| 27 | 12.1 | 6:08 | 6:13 |
| 28 | 12.1 | 6:07 | 6:13 |
| 29 | 12.1 | 6:06 | 6:14 |
| 30 | 12.1 | 6:05 | 6:14 |
| 31 | 12.2 | 6:04 | 6:14 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 4.77 kWh/m².
For context, solar energy here swings from a low near 3.14 kWh/m² to a high of 5.26 kWh/m² in April across the year — March's 4.77 kWh/m² sits near the top of that range.
| 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 | 4.4 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 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 | 4.9 | 4.9 | 4.9 | 4.9 | 4.9 | 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 | 4.4 | Bright |
| 3 | 4.5 | Bright |
| 4 | 4.5 | Bright |
| 5 | 4.5 | Bright |
| 6 | 4.6 | Bright |
| 7 | 4.6 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.7 | Bright |
| 12 | 4.8 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.8 | 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 | 4.9 | Bright |
| 27 | 4.9 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
| 31 | 4.9 | Bright |
Hazard calendar for Sơn La
None of Sơn La's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Sơn La's monsoon runs May–September, when most of the year's rain falls.
Is March a good time to visit Sơn La?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is one of the better times to visit Sơn La for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sơn La in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Sơn La sees daytime highs around 27°C and nights near 16°C. Worth packing: light clothes and sun protection. About 7 days see rain.
UV index in Sơn La in March
Clear-sky midday UV in March 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 Sơn La peaks around June 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 6 (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) | 7 | 9 | 11 | 9 | 11 | 14 | 13 | 13 | 9 | 9 | 8 | 6 |
| Level | Very high | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | Very high |
| Feb | 9 | Very high |
| Mar | 11 | Extreme |
| Apr | 9 | Very high |
| May | 11 | Extreme |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 9 | Very high |
| Oct | 9 | Very high |
| Nov | 8 | Very high |
| Dec | 6 | High |
Air quality in Sơn La 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 Sơn La is worst in April — around 151 µg/m³ PM2.5 (very unhealthy), about 12.9× the cleanest month (August, 12 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) | 32 | 38 | 67 | 151 | 58 | 14 | 12 | 12 | 16 | 23 | 26 | 31 |
| Level | Moderate | Poor | Unhealthy | Very unhealthy | Unhealthy | Moderate | Good | Good | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 32 | Moderate |
| Feb | 38 | Poor |
| Mar | 67 | Unhealthy |
| Apr | 151 | Very unhealthy |
| May | 58 | Unhealthy |
| Jun | 14 | Moderate |
| Jul | 12 | Good |
| Aug | 12 | Good |
| Sep | 16 | Moderate |
| Oct | 23 | Moderate |
| Nov | 26 | Moderate |
| Dec | 31 | Moderate |
Where is Sơn La?
Sơn La sits at 21.3°N, 103.9°E, 608 m above sea level, in Vietnam. The nearest listed city is Ít Ong, 24 km away.
Topography around Sơn La
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sơn La.
Within 3 km, the terrain around Sơn La has significant variations in elevation — a maximum elevation change of 348 m around an average of 674 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,404 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,830 m.
The land around Sơn La is covered by trees (59%) within 3 km, trees (69%) and grassland (21%) within 16 km, and trees (68%) and grassland (27%) within 80 km.
Vietnam travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C / F
- 220 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,066
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Safe drinking water
- 59%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2011
- Road deaths
- 30.6
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 500
- 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 Sơn La (21.3256°, 103.9188°, elevation 608 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).