Climate averages 1991–2020
Dien Bien Phu weather
in May.
A hot, very wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Dien Bien Phu: daytime highs average 30.2°C and nights cool to about 22.1°C. By daytime temperature it is the warmest month of the year.
Expect about 195 mm of rain on roughly 22 days, which makes May a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 09 min on an average May day.
The nearest other city in this atlas is Thị Trấn Thuận Châu (69 km away). In May its highs average 29.7°C, 0.5°C cooler than Dien Bien Phu, with 207 mm of rain.
Among the 136 cities listed in Vietnam, Dien Bien Phu ranks joint 115th of 136 for the warmest May highs and 57th of 136 for the driest May (rainfall, lowest first). The mean May high of those 136 cities is 31.2°C; Dien Bien Phu is 1.0°C cooler than that mean.
From May to June, average highs fall by 0.8°C to 29.3°C, and monthly rainfall rises from 195 mm to 323 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Dien Bien Phu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.7°C12.7°C | 12.7°C | 35 | 5.0 | 11.011 h |
| February | 25.6°C14.4°C | 14.4°C | 26 | 4.8 | 11.411 h |
| March | 29.2°C17.8°C | 17.8°C | 55 | 8.5 | 12.012 h |
| April | 30.1°C20.5°C | 20.5°C | 115 | 15.3 | 12.613 h |
| May, selected | 30.2°C22.1°C | 22.1°C | 195 | 22.2 | 13.113 h |
| June | 29.3°C22.8°C | 22.8°C | 323 | 27.3 | 13.413 h |
| July | 28.5°C22.6°C | 22.6°C | 403 | 28.9 | 13.313 h |
| August | 28.6°C22.6°C | 22.6°C | 368 | 28.3 | 12.913 h |
| September | 28.3°C21.8°C | 21.8°C | 199 | 21.5 | 12.312 h |
| October | 27.0°C19.5°C | 19.5°C | 72 | 11.5 | 11.712 h |
| November | 25.2°C16.0°C | 16.0°C | 33 | 5.5 | 11.111 h |
| December | 22.5°C12.7°C | 12.7°C | 29 | 4.5 | 10.911 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Thị Trấn Thuận Châu in MayVietnam · 69 kmHigh 29.7°C · Low 21.6°C · 207 mm rain
- Sơn La in MayVietnam · 93 kmHigh 29.3°C · Low 21.3°C · 147 mm rain
- Lào Cai in MayVietnam · 157 kmHigh 31.1°C · Low 23.5°C · 199 mm rain
- Yên Bái in MayVietnam · 199 kmHigh 30.0°C · Low 23.7°C · 294 mm rain
- Gejiu in MayChina · 220 kmHigh 24.7°C · Low 16.3°C · 113 mm rain
- Mengzi in MayChina · 223 kmHigh 26.7°C · Low 18.0°C · 164 mm rain
- Bắc Quang in MayVietnam · 226 kmHigh 30.5°C · Low 23.7°C · 324 mm rain
- Phú Thọ in MayVietnam · 228 kmHigh 30.9°C · Low 24.1°C · 219 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Dien Bien Phu) is explained once on the Dien Bien Phu year overview and on the Sources, method and limits page.