Gansu weather in September
September is one of the best months to visit Gansu: highs of 21°C (69°F) and about 61 mm (2.4 in) of rain on average. Nights average 8°C (46°F) and cloud cover 67% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 5th warmest. Compared with August, it is cooler and drier; October brings highs of 15°C (58°F) and 30 mm (1.2 in) of rain.
Figures are long-term averages for Lanzhou, the largest city in Gansu. See below for other places.
Is September a good time to visit Gansu?
best month Weather score 76/100.
Yes. September is one of the best months for weather in Gansu.
Does it rain a lot in Gansu in September?
Some rain is normal: about 61 mm (2.4 in) falls in an average September. It is the 4th wettest month of the year.
How warm is Gansu in September?
Days average 21°C (69°F) and nights 8°C (46°F).
Gansu weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 0°C (32°F) | -12°C (11°F) | 4 mm | 48% | least pleasant |
| February | 4°C (39°F) | -9°C (16°F) | 6 mm | 54% | least pleasant |
| March | 10°C (49°F) | -4°C (24°F) | 11 mm | 58% | least pleasant |
| April | 17°C (62°F) | 1°C (34°F) | 25 mm | 62% | best |
| May | 21°C (70°F) | 6°C (43°F) | 52 mm | 67% | best |
| June | 25°C (78°F) | 11°C (52°F) | 64 mm | 69% | best |
| July | 27°C (81°F) | 13°C (56°F) | 83 mm | 63% | best |
| August | 26°C (79°F) | 12°C (54°F) | 86 mm | 63% | best |
| September | 21°C (69°F) | 8°C (46°F) | 61 mm | 67% | best |
| October | 15°C (58°F) | 1°C (34°F) | 30 mm | 55% | fair |
| November | 7°C (45°F) | -5°C (23°F) | 8 mm | 41% | least pleasant |
| December | 1°C (34°F) | -11°C (13°F) | 2 mm | 39% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Gansu in September
Weather can differ a lot within Gansu: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Lanzhou | 21°C (69°F) | 8°C (46°F) | 61 mm | best |
| Qingyang | 22°C (72°F) | 11°C (52°F) | 105 mm | fair |
| Tianshui | 21°C (70°F) | 10°C (50°F) | 94 mm | best |
| Wuwei | 21°C (69°F) | 9°C (47°F) | 48 mm | best |
| Zhangye | 22°C (71°F) | 9°C (48°F) | 29 mm | best |
| Pingliang | 21°C (70°F) | 10°C (50°F) | 100 mm | best |
| Jiuquan | 19°C (67°F) | 8°C (46°F) | 19 mm | best |
| Dingxi | 20°C (67°F) | 7°C (45°F) | 69 mm | best |
| Baiyin | 22°C (72°F) | 9°C (48°F) | 48 mm | best |
| Linxia Chengguanzhen | 18°C (65°F) | 5°C (42°F) | 79 mm | best |
| Jiayuguan | 24°C (75°F) | 11°C (52°F) | 13 mm | best |
| Jinchang | 24°C (74°F) | 11°C (52°F) | 32 mm | best |