Climate averages 1991–2020
Hạ Long weather
in July.
A hot, very wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Hạ Long: daytime highs average 30.7°C and nights cool to about 26.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 305 mm of rain on roughly 24 days, which makes July a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 16 min on an average July day.
The nearest other city in this atlas is Cẩm Phả (22 km away). In July its highs average 30.2°C, about as warm as Hạ Long, with 373 mm of rain.
Among the 136 cities listed in Vietnam, Hạ Long ranks joint 67th of 136 for the warmest July highs and 117th of 136 for the driest July (rainfall, lowest first). The mean July high of those 136 cities is 30.8°C; Hạ Long is 0.1°C cooler than that mean.
From July to August, average highs fall by 0.3°C to 30.4°C, and monthly rainfall rises from 305 mm to 381 mm.
The annual picture
July 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, selected | 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
July in nearby cities
- Cẩm Phả in JulyVietnam · 22 kmHigh 30.2°C · Low 26.6°C · 373 mm rain
- Haiphong in JulyVietnam · 42 kmHigh 31.5°C · Low 26.6°C · 281 mm rain
- Kiến An in JulyVietnam · 49 kmHigh 31.5°C · Low 26.9°C · 281 mm rain
- Thị Trấn Mạo Khê in JulyVietnam · 51 kmHigh 31.8°C · Low 26.3°C · 269 mm rain
- Thị Trấn Đông Triều in JulyVietnam · 60 kmHigh 31.9°C · Low 26.3°C · 269 mm rain
- Chũ in JulyVietnam · 71 kmHigh 31.3°C · Low 25.6°C · 301 mm rain
- Hải Dương in JulyVietnam · 77 kmHigh 32.3°C · Low 26.5°C · 276 mm rain
- Chí Linh in JulyVietnam · 80 kmHigh 32.2°C · Low 26.2°C · 276 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.