Climate averages 1991–2020
Lào Cai weather
by month.
See how the year changes. June has the highest average daily maximum; November (tied with February) has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Lào Cai averages a daytime high of 26.8°C and a nighttime low of 19.6°C, with about 1,872 mm of rain on roughly 222 days. June is the warmest month (average high 31.8°C) and January the coolest (18.9°C). August is the wettest month with 268 mm; November (tied with February) is the driest with 88 mm.
The annual picture
A year in Lào Cai
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
Lào Cai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.9°C12.1°C | 12.1°C | 96 | 18.1 | 10.911 h |
| February | 21.4°C13.3°C | 13.3°C | 88 | 17.1 | 11.411 h |
| March | 25.5°C16.7°C | 16.7°C | 126 | 19.0 | 12.012 h |
| April | 29.3°C20.6°C | 20.6°C | 129 | 17.6 | 12.713 h |
| May | 31.1°C23.5°C | 23.5°C | 199 | 19.7 | 13.213 h |
| June | 31.8°C25.1°C | 25.1°C | 242 | 22.0 | 13.513 h |
| July | 31.3°C24.8°C | 24.8°C | 261 | 23.2 | 13.413 h |
| August | 31.2°C24.5°C | 24.5°C | 268 | 22.4 | 12.913 h |
| September | 29.8°C23.5°C | 23.5°C | 165 | 18.1 | 12.312 h |
| October | 26.9°C21.2°C | 21.2°C | 118 | 16.6 | 11.612 h |
| November | 23.9°C17.2°C | 17.2°C | 88 | 13.8 | 11.111 h |
| December | 20.0°C13.2°C | 13.2°C | 92 | 14.1 | 10.811 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
Nearby cities
- Bắc QuangVietnam · 92 kmHigh 26.7°C · Low 20.4°C · 2,524 mm rain a year
- Wenshan CityChina · 102 kmHigh 22.9°C · Low 14.5°C · 1,056 mm rain a year
- MengziChina · 115 kmHigh 22.8°C · Low 14.9°C · 1,453 mm rain a year
- Thị Trấn Thuận ChâuVietnam · 120 kmHigh 26.5°C · Low 18.5°C · 1,934 mm rain a year
- GejiuChina · 128 kmHigh 21.1°C · Low 13.3°C · 1,174 mm rain a year
- Yên BáiVietnam · 129 kmHigh 26.1°C · Low 20.5°C · 2,233 mm rain a year
- Sơn LaVietnam · 129 kmHigh 26.1°C · Low 18.1°C · 1,340 mm rain a year
- Tuyên QuangVietnam · 148 kmHigh 26.9°C · Low 20.7°C · 2,009 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC+7, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 22.50°, 104.00° (3 km from the city centre), adjusted up by 0.5°C for the difference between the city's elevation (86 m) and the cell's (163 m). Rain comes from the 0.25° cell at 22.50°, 104.00°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.