Climate averages 1991–2020
Nghi Sơn weather
in September.
A hot, very wet month: the 5th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Nghi Sơn: daytime highs average 29.3°C and nights cool to about 24.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 293 mm of rain on roughly 19 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 16 min on an average September day.
The nearest other city in this atlas is Hoàng Mai (13 km away). In September its highs average 29.9°C, 0.6°C warmer than Nghi Sơn, with 293 mm of rain.
Among the 136 cities listed in Vietnam, Nghi Sơn ranks joint 111th of 136 for the warmest September highs and joint 95th of 136 for the driest September (rainfall, lowest first). The mean September high of those 136 cities is 29.7°C; Nghi Sơn is 0.4°C cooler than that mean.
From September to October, average highs fall by 2.5°C to 26.9°C, and monthly rainfall falls from 293 mm to 219 mm.
The annual picture
September 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
Nghi Sơn climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 20.0°C15.2°C | 15.2°C | 23 | 4.9 | 11.111 h |
| February | 21.7°C16.5°C | 16.5°C | 15 | 3.9 | 11.512 h |
| March | 25.0°C19.1°C | 19.1°C | 31 | 5.7 | 12.012 h |
| April | 28.9°C22.4°C | 22.4°C | 47 | 7.0 | 12.613 h |
| May | 31.4°C25.2°C | 25.2°C | 115 | 12.1 | 13.013 h |
| June | 33.0°C27.2°C | 27.2°C | 124 | 11.5 | 13.313 h |
| July | 32.7°C27.0°C | 27.0°C | 171 | 13.1 | 13.213 h |
| August | 31.1°C25.9°C | 25.9°C | 263 | 20.1 | 12.813 h |
| September, selected | 29.3°C24.4°C | 24.4°C | 293 | 19.4 | 12.312 h |
| October | 26.9°C22.3°C | 22.3°C | 219 | 16.3 | 11.712 h |
| November | 24.3°C19.5°C | 19.5°C | 63 | 9.0 | 11.211 h |
| December | 20.8°C16.1°C | 16.1°C | 30 | 5.0 | 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
September in nearby cities
- Hoàng Mai in SeptemberVietnam · 13 kmHigh 29.9°C · Low 24.8°C · 293 mm rain
- Sầm Sơn in SeptemberVietnam · 46 kmHigh 29.5°C · Low 25.2°C · 368 mm rain
- Thanh Hóa in SeptemberVietnam · 53 kmHigh 29.8°C · Low 24.8°C · 289 mm rain
- Vinh in SeptemberVietnam · 74 kmHigh 29.9°C · Low 25.0°C · 330 mm rain
- Hoa Lư in SeptemberVietnam · 105 kmHigh 30.0°C · Low 24.2°C · 289 mm rain
- Hà Tĩnh in SeptemberVietnam · 110 kmHigh 29.3°C · Low 24.6°C · 391 mm rain
- Nam Định in SeptemberVietnam · 129 kmHigh 30.0°C · Low 24.5°C · 277 mm rain
- Phủ Lý in SeptemberVietnam · 136 kmHigh 30.0°C · Low 24.0°C · 274 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 Nghi Sơn) is explained once on the Nghi Sơn year overview and on the Sources, method and limits page.
Hoàng Mai lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.