Climate averages 1991–2020
Lanzhou weather
in May.
A warm, moderately wet month: the 4th warmest and the 8th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Lanzhou: daytime highs average 23.8°C and nights cool to about 10.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 44 mm of rain on roughly 8 days, which makes May a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 03 min on an average May day.
The nearest other city in this atlas is Baiyin (62 km away). In May its highs average 22.0°C, 1.8°C cooler than Lanzhou, with 30 mm of rain.
Among the 884 cities listed in China, Lanzhou ranks joint 660th of 884 for the warmest May highs and joint 111th of 884 for the driest May (rainfall, lowest first). The mean May high of those 884 cities is 25.2°C; Lanzhou is 1.4°C cooler than that mean.
From May to June, average highs rise by 3.9°C to 27.7°C, and monthly rainfall rises from 44 mm to 57 mm.
The annual picture
May in context
Monthly precipitation
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
Lanzhou climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.7°C-8.1°C | -8.1°C | 4.2 | 1.8 | 10.010 h |
| February | 6.0°C-5.0°C | -5.0°C | 5.8 | 1.9 | 10.811 h |
| March | 12.8°C0.0°C | 0.0°C | 13 | 3.8 | 11.912 h |
| April | 19.4°C5.5°C | 5.5°C | 24 | 5.6 | 13.113 h |
| May, selected | 23.8°C10.7°C | 10.7°C | 44 | 8.0 | 14.114 h |
| June | 27.7°C15.3°C | 15.3°C | 57 | 9.0 | 14.615 h |
| July | 29.2°C17.6°C | 17.6°C | 86 | 12.3 | 14.414 h |
| August | 27.5°C16.7°C | 16.7°C | 100 | 13.2 | 13.514 h |
| September | 22.3°C12.3°C | 12.3°C | 72 | 11.7 | 12.412 h |
| October | 16.3°C6.1°C | 6.1°C | 41 | 9.0 | 11.311 h |
| November | 9.6°C-0.7°C | -0.7°C | 7.7 | 2.5 | 10.310 h |
| December | 3.4°C-5.7°C | -5.7°C | 2.0 | 0.7 | 9.810 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
May in nearby cities
- Baiyin in MayChina · 62 kmHigh 22.0°C · Low 9.3°C · 30 mm rain
- Linxia Chengguanzhen in MayChina · 76 kmHigh 19.5°C · Low 6.3°C · 64 mm rain
- Dingxi in MayChina · 89 kmHigh 19.6°C · Low 6.7°C · 56 mm rain
- Nianbo in MayChina · 136 kmHigh 19.7°C · Low 8.1°C · 62 mm rain
- Tongren (Qinghai), China in MayChina · 175 kmHigh 15.9°C · Low 3.6°C · 127 mm rain
- Luomen in MayChina · 180 kmHigh 21.8°C · Low 10.3°C · 67 mm rain
- Pan’an in MayChina · 185 kmHigh 22.1°C · Low 10.6°C · 67 mm rain
- Xinxing in MayChina · 196 kmHigh 22.4°C · Low 10.8°C · 68 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 Lanzhou) is explained once on the Lanzhou year overview and on the Sources, method and limits page.