Climate averages 1991–2020
Hạ Long weather
in October.
A warm, wet month: the 6th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in Hạ Long: daytime highs average 27.8°C and nights cool to about 22.9°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 104 mm of rain on roughly 12 days, which makes October a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 41 min on an average October day.
The nearest other city in this atlas is Cẩm Phả (22 km away). In October its highs average 27.4°C, about as warm as Hạ Long, with 126 mm of rain.
Among the 136 cities listed in Vietnam, Hạ Long ranks joint 92nd of 136 for the warmest October highs and 15th of 136 for the driest October (rainfall, lowest first). The mean October high of those 136 cities is 28.4°C; Hạ Long is 0.6°C cooler than that mean.
From October to November, average highs fall by 3.1°C to 24.8°C, and monthly rainfall falls from 104 mm to 51 mm.
The annual picture
October 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
Hạ Long climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.1°C14.6°C | 14.6°C | 34 | 6.4 | 11.011 h |
| February | 20.5°C15.8°C | 15.8°C | 21 | 5.7 | 11.411 h |
| March | 23.2°C18.5°C | 18.5°C | 43 | 8.8 | 12.012 h |
| April | 26.7°C21.8°C | 21.8°C | 69 | 11.6 | 12.613 h |
| May | 29.3°C24.8°C | 24.8°C | 219 | 19.5 | 13.113 h |
| June | 30.8°C26.8°C | 26.8°C | 266 | 22.4 | 13.413 h |
| July | 30.7°C26.8°C | 26.8°C | 305 | 24.3 | 13.313 h |
| August | 30.4°C26.1°C | 26.1°C | 381 | 26.2 | 12.813 h |
| September | 29.6°C25.0°C | 25.0°C | 243 | 20.0 | 12.312 h |
| October, selected | 27.8°C22.9°C | 22.9°C | 104 | 11.9 | 11.712 h |
| November | 24.8°C19.6°C | 19.6°C | 51 | 8.2 | 11.211 h |
| December | 20.8°C15.8°C | 15.8°C | 31 | 5.9 | 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
October in nearby cities
- Cẩm Phả in OctoberVietnam · 22 kmHigh 27.4°C · Low 23.0°C · 126 mm rain
- Haiphong in OctoberVietnam · 42 kmHigh 28.1°C · Low 21.9°C · 133 mm rain
- Kiến An in OctoberVietnam · 49 kmHigh 27.8°C · Low 22.2°C · 133 mm rain
- Thị Trấn Mạo Khê in OctoberVietnam · 51 kmHigh 28.4°C · Low 21.3°C · 108 mm rain
- Thị Trấn Đông Triều in OctoberVietnam · 60 kmHigh 28.3°C · Low 21.3°C · 108 mm rain
- Chũ in OctoberVietnam · 71 kmHigh 28.0°C · Low 20.6°C · 102 mm rain
- Hải Dương in OctoberVietnam · 77 kmHigh 28.3°C · Low 21.6°C · 119 mm rain
- Chí Linh in OctoberVietnam · 80 kmHigh 28.4°C · Low 21.4°C · 119 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 Hạ Long) is explained once on the Hạ Long year overview and on the Sources, method and limits page.