Tianshui is situated on the northern fringe of the subtropical region and the eastern incline of the Qinghai-Xizang Plateau. The climate of Tianshui displays clear characteristics of a temperate monsoon climate, with semi-humid and semi-arid conditions due to its topography and geographic location. The average annual temperature is about 11℃, the average temperature in the hottest month (July) is 22.8℃, and the average temperature in the coldest month (January) is -2.0℃. The extreme maximum temperature is 38.2℃, and the extreme minimum temperature is -17.4℃. The annual temperature difference is large, and the annual difference is between 23.9℃ and 26.1℃.
The annual average precipitation is 491.7 mm, decreasing gradually from southeast to northwest. The annual precipitation in the southern subtropical forest area is 800-900 mm, the rainfall in the central and eastern mountains is more than 600 mm, and the northern Weihe River is less than 500 mm. The annual maximum rainfall can reach 860.1mm, and more than 50% of the annual precipitation is concentrated in July-September：
Annual mean temperature of Tianshui
| Average Annual Temperature |
January | February | March | April | May | June |
| Daily Maximum Temperature | 3 ℃ | 7 ℃ | 13 ℃ | 19 ℃ | 24 ℃ | 27 ℃ |
| Daily Minimum Temperature | -6 ℃ | -3 ℃ | 2 ℃ | 7 ℃ | 11 ℃ | 15 ℃ |
| Average Precipitation Total (mm) | 5 | 6 | 17 | 39 | 54 | 71 |
| Average Annual Temperature | July | August | September | October | November | December |
| Daily Maximum Temperature | 29 ℃ | 28 ℃ | 22 ℃ | 17 ℃ | 10 ℃ | 5 ℃ |
| Daily Minimum Temperature | 18 ℃ | 17 ℃ | 13 ℃ | 7 ℃ | 1 ℃ | -5 ℃ |
| Average Precipitation Total (mm) | 92 | 85 | 86 | 47 | 13 | 3 |
In various seasons, the temperature in Tianshui fluctuates, impacting daily life and travel. The optimal times to visit Tianshui are spring and autumn.
Spring and autumn are considered the best seasons to visit Tianshui. These seasons offer unique charm and scenery, allowing tourists to enjoy the natural beauty of Tianshui. In spring, nature wakes up with birds and flowers blooming, creating a fresh green landscape that brings joy to people with the sight of spring flowers. At this time, the climate in Tianshui is quite pleasant, not as chilly as winter, nor as scorching and arid as summer. In autumn, the temperature gradually decreases, with cool mornings and evenings, and warm, comfortable days. Autumn is pleasant, making it an ideal time to explore captivating destinations. During this season, visitors can experience the peace and charm of nature, particularly at picturesque locations like the Yellow River Stone Forest, while marveling at the enchanting grandeur of the natural world.
When traveling to Tianshui, tourists should select suitable clothing and gear based on the local climate, and implement measures like sun protection, heat prevention, and warmth to guarantee comfort and safety during the journey. By comprehending and adapting to Tianshui's temperature fluctuations, one can fully appreciate the city's beauty and traditions.
