Lanzhou, Gansu Weather by Month and Climate Averages

How much rain does Lanzhou get?

Lanzhou gets 443 mm of precipitation in an average year, spread over about 95 days with measurable rain. That is fewer rainy days than 51% of China.

August is the wettest month, with 89 mm. January is the driest, with 5 mm. July has the most rainy days, about 13.

The longest dry spell in the last five years lasted 65 days, to January 22, 2023.

Lanzhou weather by month

Lanzhou weather in January

In January, Lanzhou averages a high of 1°C and a low of -13°C. It gets 5 mm of precipitation over about 4 rainy days. The sun is out about 59% of daylight hours. The January record high is 16°C (2014) and the record low is -24°C (2012).

Lanzhou weather in February

In February, Lanzhou averages a high of 4°C and a low of -9°C. It gets 10 mm of precipitation over about 4 rainy days. The sun is out about 49% of daylight hours. The February record high is 21°C (2010) and the record low is -22°C (2008).

Lanzhou weather in March

In March, Lanzhou averages a high of 11°C and a low of -3°C. It gets 14 mm of precipitation over about 6 rainy days. The sun is out about 45% of daylight hours. The March record high is 26°C (2025) and the record low is -16°C (2024).

Lanzhou weather in April

In April, Lanzhou averages a high of 17°C and a low of 2°C. It gets 23 mm of precipitation over about 6 rainy days. The sun is out about 41% of daylight hours. The April record high is 29°C (2006) and the record low is -9°C (2018). April is one of the most comfortable months to visit.

Lanzhou weather in May

In May, Lanzhou averages a high of 21°C and a low of 6°C. It gets 58 mm of precipitation over about 11 rainy days. The sun is out about 40% of daylight hours. The May record high is 32°C (2007) and the record low is -2°C (2026). May is one of the most comfortable months to visit.

Lanzhou weather in June

In June, Lanzhou averages a high of 25°C and a low of 10°C. It gets 56 mm of precipitation over about 10 rainy days. The sun is out about 34% of daylight hours. The June record high is 33°C (2022) and the record low is 3°C (2019). June is one of the most comfortable months to visit.

Lanzhou weather in July

In July, Lanzhou averages a high of 27°C and a low of 12°C. It gets 82 mm of precipitation over about 13 rainy days. The sun is out about 49% of daylight hours. The July record high is 37°C (2010) and the record low is 6°C (2015). July is one of the most comfortable months to visit.

Lanzhou weather in August

In August, Lanzhou averages a high of 25°C and a low of 12°C. It gets 89 mm of precipitation over about 13 rainy days. The sun is out about 42% of daylight hours. The August record high is 34°C (2021) and the record low is 4°C (2020).

Lanzhou weather in September

In September, Lanzhou averages a high of 19°C and a low of 8°C. It gets 59 mm of precipitation over about 13 rainy days. The sun is out about 40% of daylight hours. The September record high is 31°C (2024) and the record low is 1°C (2012). September is one of the most comfortable months to visit.

Lanzhou weather in October

In October, Lanzhou averages a high of 14°C and a low of 2°C. It gets 29 mm of precipitation over about 9 rainy days. The sun is out about 42% of daylight hours. The October record high is 26°C (2021) and the record low is -6°C (2020).

Lanzhou weather in November

In November, Lanzhou averages a high of 8°C and a low of -5°C. It gets 9 mm of precipitation over about 4 rainy days. The sun is out about 62% of daylight hours. The November record high is 20°C (2023) and the record low is -19°C (2009).

Lanzhou weather in December

In December, Lanzhou averages a high of 2°C and a low of -12°C. It gets 10 mm of precipitation over about 3 rainy days. The sun is out about 60% of daylight hours. The December record high is 15°C (2023) and the record low is -23°C (2012).

Sunshine, humidity and wind in Lanzhou

November is the sunniest month in Lanzhou, with sunshine about 62% of daylight hours. June is the cloudiest, at 34%. Over the year the sun shines about 47% of daylight hours. Lanzhou is sunnier than 52% of China.

Humidity peaks in September at 61% and is lowest in March at 38%.

Lanzhou has about 5 days a year above 32°C. Lanzhou is cooler than 84% of China.

First and last freeze in Lanzhou

The first fall freeze in Lanzhou typically comes around October 15, and the last spring freeze around April 27. That leaves a frost-free growing season of about 171 days.

Lanzhou weather records

The hottest temperature on record at the Lanzhou station is 37°C, on July 30, 2010. The coldest is -24°C, on January 30, 2008.

The wettest day on record brought 119 mm of rain, on August 13, 2022.

The best time to visit Lanzhou

The most comfortable time to visit is typically April to July and September, when daytime highs sit near 22°C.

Winter (December–February) is cold, with average highs around 2°C and lows near -11°C.

Spring (March–May) is mild, with average highs around 16°C and lows near 2°C.

Summer (June–August) is warm, with average highs around 25°C and lows near 11°C.

Autumn (September–November) is mild, with average highs around 14°C and lows near 1°C.

Lanzhou climate questions

How much rain does Lanzhou get?

Lanzhou gets 443 mm of precipitation in an average year, over about 95 rainy days.

What is the wettest month in Lanzhou?

August is the wettest month in Lanzhou, with 89 mm. January is the driest, with 5 mm.

How many rainy days does Lanzhou have a year?

Lanzhou has about 95 days with measurable rain in an average year. July has the most, about 13.

What is the hottest month in Lanzhou?

July is the warmest month in Lanzhou, with an average high of 27°C.

What is the coldest month in Lanzhou?

January is the coldest month in Lanzhou, with an average low of -13°C.

What is the record high temperature in Lanzhou?

The record high at the Lanzhou station is 37°C, set on July 30, 2010. The record low is -24°C, on January 30, 2008.

What is the sunniest month in Lanzhou?

November is the sunniest month in Lanzhou, with sunshine about 62% of daylight hours. June is the cloudiest.

When is the first frost in Lanzhou?

The first fall freeze in Lanzhou typically comes around October 15. The last spring freeze is around April 27.

What is the best time to visit Lanzhou?

The most comfortable time to visit is typically April to July and September, when daytime highs sit near 22°C.