Climate Insights for Tanchang Chengguanzhen

Longnan Shi, Gansu Sheng, China

Hottest
July
22°C peak
Coldest
January
-13°C low
Wettest
July
123mm rain
Best to Visit
August
Mild temps & low rain

Climate Overview

The climate in Tanchang Chengguanzhen is cool. The average annual temperature is 6°C and approximately 817mm of precipitation falls per year. July is the wettest month, receiving around 123mm of rainfall. Tanchang Chengguanzhen is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -13°C. Snowfall occurs from January to December, with around 99cm accumulating over the season.

Temperature

-20° -10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: -1° Average: -7° Min: -13° Feb Max: 1° Average: -4° Min: -11° Mar Max: 8° Average: 3° Min: -3° Apr Max: 13° Average: 8° Min: 3° May Max: 16° Average: 11° Min: 7° Jun Max: 19° Average: 15° Min: 11° Jul Max: 22° Average: 17° Min: 13° Aug Max: 21° Average: 17° Min: 13° Sep Max: 17° Average: 13° Min: 9° Oct Max: 12° Average: 7° Min: 3° Nov Max: 7° Average: 1° Min: -4° Dec Max: 1° Average: -5° Min: -11°
Max
Average
Min

Temperatures in Tanchang Chengguanzhen vary considerably across the year, with a 35°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 22°C with a mean of 17°C. The coldest month is January, when overnight lows fall to -13°C and the daily average is -7°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 7°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm 125mm 150mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 12mm Snow: 12mm Feb Precipitation: 20mm Snow: 15mm Mar Precipitation: 48mm Snow: 23mm Apr Precipitation: 79mm Snow: 15mm May Precipitation: 106mm Snow: 4mm Jun Precipitation: 98mm Snow: 0mm Jul Precipitation: 123mm Snow: 0mm Aug Precipitation: 98mm Snow: 0mm Sep Precipitation: 112mm Snow: 0mm Oct Precipitation: 84mm Snow: 9mm Nov Precipitation: 29mm Snow: 12mm Dec Precipitation: 10mm Snow: 9mm
Precipitation
Snow

Tanchang Chengguanzhen is a moderately rainy area, receiving approximately 817mm of precipitation annually, which averages out to around 68mm per month. The wettest month is July, averaging 123mm of rainfall. September and May also tend to see above-average precipitation. The driest month is December, with just 10mm. That's 113mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 99cm accumulating over the season. March typically sees the most snow at around 23cm.

Wind

0km/h 5km/h 10km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 7km/h Feb Wind Speed: 7km/h Mar Wind Speed: 8km/h Apr Wind Speed: 9km/h May Wind Speed: 9km/h Jun Wind Speed: 8km/h Jul Wind Speed: 8km/h Aug Wind Speed: 9km/h Sep Wind Speed: 9km/h Oct Wind Speed: 8km/h Nov Wind Speed: 8km/h Dec Wind Speed: 7km/h
Wind Speed

Tanchang Chengguanzhen is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

88 days until Summer

It is currently spring in Tanchang Chengguanzhen, which began on March 20, 2026. Tanchang Chengguanzhen is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 22°C, while the coldest stretch bottoms out in January near -13°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

Spring

Temperatures range from -3 to 16°C. Precipitation is moderate at around 232mm for the season, averaging 77mm per month. Winds are generally light, averaging 9km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 11 to 22°C. Rainfall is heavy, totalling around 319mm across the season with a monthly average of 106mm. Winds are generally light, averaging 9km/h. Comfortable clothing with a light layer for cooler evenings is all you need.

Autumn

Temperatures range from -4 to 17°C. Precipitation is moderate at around 224mm for the season, averaging 75mm per month. Expect around 21cm of snow accumulation during this period. Winds are generally light, averaging 8km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -13 to 1°C. Precipitation is minimal, with only around 42mm for the entire season. Expect around 36cm of snow accumulation during this period. Winds are generally light, averaging 7km/h. Heavy layering and insulated outerwear are essential — exposed skin should be minimised outdoors.

Best Time to Visit

Jan -7°
Feb -4°
Mar
Apr
May 11°
Jun 15°
Jul 17°
Aug 17°
Sep 13°
Oct
Nov
Dec -5°

The best time to visit Tanchang Chengguanzhen is during August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 98mm per month. By contrast, July can be uncomfortably hot with highs reaching 22°C, while January is the coldest period with lows dropping to -13°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

Monthly Climate Data

The table below shows monthly climate averages for Tanchang Chengguanzhen based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
-13 °C
-1 °C
7 km/h
12 mm
12 cm
Feb
-11 °C
1 °C
7 km/h
20 mm
15 cm
Mar Current
-3 °C
8 °C
8 km/h
48 mm
23 cm
Apr
3 °C
13 °C
9 km/h
79 mm
15 cm
May
7 °C
16 °C
9 km/h
106 mm
4 cm
Jun
11 °C
19 °C
8 km/h
98 mm
0 cm
Jul
13 °C
22 °C
8 km/h
123 mm
0 cm
Aug
13 °C
21 °C
9 km/h
98 mm
0 cm
Sep
9 °C
17 °C
9 km/h
112 mm
0 cm
Oct
3 °C
12 °C
8 km/h
84 mm
9 cm
Nov
-4 °C
7 °C
8 km/h
29 mm
12 cm
Dec
-11 °C
1 °C
7 km/h
10 mm
9 cm
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Metric (°C, km/h)