Northern mountains
Elevation matters greatly. Sa Pa and high passes can be cold and misty in winter. Son La illustrates a wetter summer and drier winter.
Every month in figures
| Month | Mean temperature | Rainfall | Rain days |
|---|---|---|---|
| January | 15.5 °C | 41.7 mm | — |
| February | 17.7 °C | 16.8 mm | — |
| March | 20.9 °C | 50.9 mm | — |
| April | 23.6 °C | 109.1 mm | — |
| May | 25.1 °C | 156.6 mm | — |
| June | 25.7 °C | 194.3 mm | — |
| July | 25.4 °C | 247.3 mm | — |
| August | 25.2 °C | 282.1 mm | — |
| September | 24.3 °C | 150.7 mm | — |
| October | 22.4 °C | 51.4 mm | — |
| November | 19.2 °C | 38.6 mm | — |
| December | 15.9 °C | 34.7 mm | — |
What does this mean for your trip?
January
Cool and relatively dryPack warm layers for Sa Pa; mist can affect views and mountain roads.
February
Cool and relatively drySon La rainfall is relatively low, but cold and mist remain possible at altitude.
March
Transition monthThe mountains start warming; allow for changing visibility on walks.
April
Transition monthA transition month with more warmth and increasing showers. Start walks with a local forecast.
May
Wetter seasonThe wetter season develops. Choose walking routes suited to current ground conditions.
June
Wetter seasonShowers are common; keep mountain journeys and walking plans flexible.
July
Wetter seasonA wet summer month. Check local advice for roads, passes and walking trails.
August
Wetter seasonThis is Son La’s wettest monthly normal. Build extra flexibility into your itinerary.
September
Transition monthRain remains possible as summer gradually gives way to the drier autumn.
October
Relatively dryLower monthly rainfall and milder temperatures make this an appealing walking period.
November
Cool and relatively dryConditions cool down. Bring warmer clothing for morning and evening walks.
December
Cool and relatively dryThe drier period does not mean warmth: pack winter layers for higher elevations.
7-day forecast for Sa Pa
This forecast is for the representative destination, not the whole region. Loading connects to Open-Meteo.
Source: Open-Meteo · CC BY 4.0 · Dates and times in Vietnam (UTC+7). Not official weather warnings. NCHMF ↗