Weather in Lanzhou - 14-day forecast

Detailed weather forecast for Lanzhou, People's Republic of China: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Lanzhou

today☀️ 26°💧 1.7 mm

Sun🌧️ 24°💧 4.4 mm

Mon🌧️ 16°💧 13.1 mm

Tue🌧️ 15°💧 6.3 mm

Wed🌧️ 16°💧 1.8 mm

Thu🌧️ 19°💧 0.6 mm

Fri🌧️ 21°💧 4.1 mm

Sat🌧️ 19°💧 5.6 mm

Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Tuesday 8 Sept in Lanzhou, the forecast high is 15°C. Typical daytime temperatures at this time of year range from 20°C to 26°C, so it will be exceptionally cool. It is cooler than 97% of similar days.

Saturday 5 Sept

26°Cwarmer than usual

usually 20°C–27°C

warmer than 77% of similar days

night: exceptionally warm rain: typical rainfall wind: stronger than usual

Sunday 6 Sept

24°Cnear normal

usually 20°C–26°C

night: exceptionally warm rain: more rain than usual wind: exceptionally strong

Monday 7 Sept

16°Cexceptionally cool

usually 20°C–26°C

cooler than 95% of similar days

night: exceptionally warm rain: exceptionally wet wind: exceptionally light

Tuesday 8 Sept

15°Cexceptionally cool

usually 20°C–26°C

cooler than 97% of similar days

night: exceptionally warm rain: exceptionally wet wind: exceptionally light

Wednesday 9 Sept

16°Cexceptionally cool

usually 19°C–26°C

cooler than 94% of similar days

night: exceptionally warm rain: typical rainfall wind: exceptionally light

Thursday 10 Sept

19°Ccooler than usual

usually 19°C–25°C

cooler than 79% of similar days

night: exceptionally warm rain: typical rainfall wind: exceptionally light

Friday 11 Sept

21°Cnear normal

usually 19°C–25°C

night: exceptionally warm rain: more rain than usual wind: exceptionally light

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →

cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 23°C by day. The coolest year was 1981 (19°C) and the warmest was 1998 (29°C). The current forecast averages 20°C - lower than in 93% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Lanzhou

Lanzhou - 14-day weather forecast infographic

Lanzhou 30 & 45-day weather - long-range outlook

Next 16 days · forecast

21°

around 19° at night · days with rain: 10

Weeks 3-4 · avg for September

19°

around 8° at night · rain chance 57%

Weeks 5-7 · avg for October

15°

around 2° at night · rain chance 31%

The 30 & 45-day outlook for Lanzhou: the next 16 days are a numerical forecast updated daily - on average 21° by day and 19° at night. Further out we rely on multi-year climate averages: around 19° in September, and about 15° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Lanzhou

Saturday5 September 2026

☀️26°clear sky

sunrise 06:39 · sunset 19:28 · night 25° · evening 29° · rain 1.68 mm · humidity 43% · wind 7 m/s · clouds 1%

Sunday6 September 2026

🌧️24°moderate rain

sunrise 06:40 · sunset 19:26 · night 16° · evening 19° · rain 4.42 mm · humidity 54% · wind 8 m/s · clouds 100%

Monday7 September 2026

🌧️16°moderate rain

sunrise 06:40 · sunset 19:25 · night 15° · evening 16° · rain 13.05 mm · humidity 85% · wind 2 m/s · clouds 100%

Tuesday8 September 2026

🌧️15°light rain

sunrise 06:41 · sunset 19:23 · night 14° · evening 14° · rain 6.32 mm · humidity 81% · wind 3 m/s · clouds 100%

Wednesday9 September 2026

🌧️16°light rain

sunrise 06:42 · sunset 19:22 · night 16° · evening 17° · rain 1.78 mm · humidity 68% · wind 3 m/s · clouds 100%

Thursday10 September 2026

🌧️19°light rain

sunrise 06:43 · sunset 19:20 · night 16° · evening 17° · rain 0.57 mm · humidity 41% · wind 3 m/s · clouds 96%

Friday11 September 2026

🌧️21°light rain

sunrise 06:43 · sunset 19:19 · night 15° · evening 20° · rain 4.05 mm · humidity 44% · wind 3 m/s · clouds 79%

Saturday12 September 2026

🌧️19°light rain

sunrise 06:44 · sunset 19:17 · night 17° · evening 18° · rain 5.55 mm · humidity 51% · wind 3 m/s · clouds 82%

Sunday13 September 2026

☀️23°clear sky

sunrise 06:45 · sunset 19:16 · night 20° · evening 22° · rain 6.15 mm · humidity 38% · wind 3 m/s · clouds 20%

Monday14 September 2026

☀️26°clear sky

sunrise 06:46 · sunset 19:14 · night 21° · evening 24° · rain 0.87 mm · humidity 31% · wind 3 m/s · clouds 100%

Tuesday15 September 2026

🌤️27°a few clouds

sunrise 06:46 · sunset 19:13 · night 21° · evening 23° · rain 3.18 mm · humidity 29% · wind 6 m/s · clouds 19%

Wednesday16 September 2026

🌧️17°light rain

sunrise 06:47 · sunset 19:12 · night 19° · evening 21° · rain 0.78 mm · humidity 64% · wind 6 m/s · clouds 100%

Thursday17 September 2026

☁️22°overcast clouds

sunrise 06:48 · sunset 19:10 · night 21° · evening 25° · rain 0.42 mm · humidity 46% · wind 3 m/s · clouds 100%

Friday18 September 2026

🌧️22°light rain

sunrise 06:49 · sunset 19:09 · night 20° · evening 25° · rain 1.59 mm · humidity 40% · wind 5 m/s · clouds 39%

Saturday19 September 2026

🌧️21°light rain

sunrise 06:50 · sunset 19:07 · night 20° · evening 24° · rain 0.3 mm · humidity 47% · wind 3 m/s · clouds 100%

Sunday20 September 2026

☀️22°clear sky

sunrise 06:50 · sunset 19:06 · night 22° · evening 27° · humidity 41% · wind 4 m/s

UV index in Lanzhou - is it safe to sunbathe?

Today the UV index in Lanzhou is 7 (high) - unprotected fair skin can burn in about 30 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

Air quality and smog in Lanzhou

Air quality in Lanzhou is currently good. Fine particulate PM2.5: 17.1 µg/m³, PM10: 25.1 µg/m³.

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Lanzhou	17.1	25.1	good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 09:00).

Lanzhou weather through the year

Warmest, driest months on average: April, May, June, July.

Upcoming public holidays in People's Republic of China: Mid-Autumn Festival — 25 September · National Day — 1 October · New Year's Day — 1 January.

Nearby and related places

Xi’anChengduChongqingShanghaiHarbinShenyangTianjin

FAQ - Lanzhou weather

What is the weather like in Lanzhou today?

Today it is about 26° during the day and 25° at night, clear sky.

How far ahead can I check the forecast for Lanzhou?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.