Climate averages 1991–2020
Sầm Sơn weather
in May.
A hot, wet month: the 4th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Sầm Sơn: daytime highs average 30.3°C and nights cool to about 25.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 139 mm of rain on roughly 12 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 03 min on an average May day.
The nearest other city in this atlas is Thanh Hóa (16 km away). In May its highs average 31.3°C, 1.0°C warmer than Sầm Sơn, with 167 mm of rain.
Among the 136 cities listed in Vietnam, Sầm Sơn ranks 114th of 136 for the warmest May highs and 21st of 136 for the driest May (rainfall, lowest first). The mean May high of those 136 cities is 31.2°C; Sầm Sơn is 0.9°C cooler than that mean.
From May to June, average highs rise by 1.8°C to 32.0°C, and monthly rainfall rises from 139 mm to 146 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
Sầm Sơn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.8°C15.4°C | 15.4°C | 55 | 10.5 | 11.111 h |
| February | 21.2°C16.7°C | 16.7°C | 36 | 8.5 | 11.511 h |
| March | 23.8°C19.2°C | 19.2°C | 52 | 9.7 | 12.012 h |
| April | 27.3°C22.6°C | 22.6°C | 62 | 7.5 | 12.613 h |
| May, selected | 30.3°C25.5°C | 25.5°C | 139 | 12.2 | 13.113 h |
| June | 32.0°C27.5°C | 27.5°C | 146 | 11.0 | 13.313 h |
| July | 31.7°C27.4°C | 27.4°C | 212 | 12.7 | 13.213 h |
| August | 30.9°C26.5°C | 26.5°C | 312 | 20.1 | 12.813 h |
| September | 29.5°C25.2°C | 25.2°C | 368 | 20.1 | 12.312 h |
| October | 27.4°C22.9°C | 22.9°C | 241 | 16.2 | 11.712 h |
| November | 24.7°C19.9°C | 19.9°C | 82 | 9.9 | 11.211 h |
| December | 21.1°C16.3°C | 16.3°C | 53 | 8.9 | 11.011 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
- Thanh Hóa in MayVietnam · 16 kmHigh 31.3°C · Low 25.3°C · 167 mm rain
- Nghi Sơn in MayVietnam · 46 kmHigh 31.4°C · Low 25.2°C · 115 mm rain
- Hoàng Mai in MayVietnam · 55 kmHigh 32.4°C · Low 25.6°C · 115 mm rain
- Hoa Lư in MayVietnam · 59 kmHigh 31.2°C · Low 24.7°C · 185 mm rain
- Nam Định in MayVietnam · 83 kmHigh 30.9°C · Low 25.0°C · 196 mm rain
- Phủ Lý in MayVietnam · 90 kmHigh 31.2°C · Low 24.4°C · 194 mm rain
- Hưng Yên in MayVietnam · 103 kmHigh 31.1°C · Low 24.6°C · 206 mm rain
- Vinh in MayVietnam · 120 kmHigh 32.1°C · Low 25.4°C · 99 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 Sầm Sơn) is explained once on the Sầm Sơn year overview and on the Sources, method and limits page.