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Lanzhou Weather by Month
Average temperatures, rainfall and humidity for Lanzhou, China, month by month, built from OpenWeather's historical records. Use it to see what a typical Lanzhou month looks like before you travel — then check the live Lanzhou forecast for the days ahead.
Warmest month
July
28°C average high
Coolest month
January
-10°C average low
Wettest month
August
40 mm of rain
Driest month
January
0 mm of rain
Average temperature and rainfall in Lanzhou by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 0°C | -10°C | -26°C / 14°C | 0 mm | 54% | 6 km/h |
| February | 4°C | -8°C | -22°C / 19°C | 0 mm | 55% | 7 km/h |
| March | 12°C | 0°C | -16°C / 26°C | 11 mm | 44% | 9 km/h |
| April | 17°C | 5°C | -12°C / 30°C | 39 mm | 44% | 10 km/h |
| May | 22°C | 10°C | -5°C / 33°C | 24 mm | 45% | 10 km/h |
| June | 25°C | 14°C | 1°C / 35°C | 25 mm | 52% | 8 km/h |
| July | 28°C | 17°C | 7°C / 37°C | 37 mm | 58% | 8 km/h |
| August | 26°C | 16°C | 7°C / 36°C | 40 mm | 61% | 8 km/h |
| September | 21°C | 11°C | -3°C / 32°C | 35 mm | 65% | 7 km/h |
| October | 15°C | 5°C | -11°C / 28°C | 18 mm | 62% | 7 km/h |
| November | 7°C | -3°C | -18°C / 21°C | 2 mm | 57% | 7 km/h |
| December | 1°C | -9°C | -21°C / 12°C | 0 mm | 56% | 7 km/h |
Best time to visit Lanzhou
The most comfortable time to visit Lanzhou is generally May to June and August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around August, totalling about 232 mm a year.
Travellers who prefer heat should aim for July, when highs average 28°C. August is the month to avoid if rain would spoil your plans — it averages 40 mm, roughly 40× the rainfall of January.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Lanzhou forecast for what is happening now.