Hạ Long weather in July
In July, Hạ Long has daytime highs averaging 31 °C, nights around 27 °C, with 24 wet days. Figures are 1991–2020 climate normals.
- 30.6°C Average high
- 26.7°C Average low
- 24days Wet days
- 305mm Rainfall
- 13h Daylight
Daily temperatures through July
How July develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 July | 30.8 °C | 26.9 °C | 73 % |
| 11–20 July | 30.8 °C | 26.9 °C | 77 % |
| 21–31 July | 30.4 °C | 26.4 °C | 83 % |
- Rain is most likely over days 21–31 of July (83 % of days) and least likely over days 1–10 (73 %).
What to expect
| Measure | Typical July | Share of the month |
|---|---|---|
| Days above 25 °C | 31 of 31 | 100 % |
| Days above 30 °C | 20 of 31 | 65 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 24 of 31 | 78 % |
Conditions in July
| Measure | Average |
|---|---|
| Mean temperature | 29 °C |
| Record high (1991–2020) | 36 °C |
| Record low (1991–2020) | 23 °C |
| Relative humidity | 86 % |
| Wind speed | 16 km/h |
| Cloud cover | 84 % |
July compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| May | 29.3 °C | 216 mm | 75 % |
| June | 30.7 °C | 269 mm | 88 % |
| July | 30.6 °C | 305 mm | 84 % |
| August | 30.4 °C | 368 mm | 82 % |
| September | 29.6 °C | 237 mm | 69 % |
See all twelve months for Hạ Long
- July is the 2nd warmest month here.
- It is the 11th driest month of the year.
- It ranks 11th for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 24 of 31 days — 78 % of the month.
- Nights are about 3.9 °C cooler than the middle of the day.
- The hottest July day on record since 1991 reached 36 °C, 5.3 °C above the usual daytime high.
QuestionsJuly in Hạ Long, answered
How warm is Hạ Long in July?
Daily highs average 31 °C and nights fall to about 27 °C, a spread of 3.9 °C between afternoon and dawn. That makes July the 2nd warmest month of the year here.
Does it rain much in Hạ Long in July?
July averages 305 mm of rain, spread over about 24 of the 31 days — 78 % of the month. Cloud cover averages 84 % of the sky.
How long are the days in July?
Hạ Long averages 13 hours between sunrise and sunset in July. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.