Climate averages 1991–2020
Hạ Long weather
in April.
A warm, moderately wet month: the 7th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a warm month in Hạ Long: daytime highs average 26.7°C and nights cool to about 21.8°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 69 mm of rain on roughly 12 days, which makes April a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 37 min on an average April day.
The nearest other city in this atlas is Cẩm Phả (22 km away). In April its highs average 26.0°C, 0.7°C cooler than Hạ Long, with 65 mm of rain.
Among the 136 cities listed in Vietnam, Hạ Long ranks 133rd of 136 for the warmest April highs and joint 31st of 136 for the driest April (rainfall, lowest first). The mean April high of those 136 cities is 30.6°C; Hạ Long is 4.0°C cooler than that mean.
From April to May, average highs rise by 2.6°C to 29.3°C, and monthly rainfall rises from 69 mm to 219 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Cẩm Phả in AprilVietnam · 22 kmHigh 26.0°C · Low 21.8°C · 65 mm rain
- Haiphong in AprilVietnam · 42 kmHigh 27.6°C · Low 21.8°C · 57 mm rain
- Kiến An in AprilVietnam · 49 kmHigh 27.5°C · Low 22.1°C · 57 mm rain
- Thị Trấn Mạo Khê in AprilVietnam · 51 kmHigh 28.5°C · Low 21.8°C · 75 mm rain
- Thị Trấn Đông Triều in AprilVietnam · 60 kmHigh 28.4°C · Low 21.7°C · 75 mm rain
- Chũ in AprilVietnam · 71 kmHigh 27.8°C · Low 20.8°C · 79 mm rain
- Hải Dương in AprilVietnam · 77 kmHigh 28.4°C · Low 21.7°C · 82 mm rain
- Chí Linh in AprilVietnam · 80 kmHigh 28.5°C · Low 21.6°C · 82 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.