Tai'an City belongs to the temperate continental semi-humid monsoon climate zone, with four distinct seasons, moderate temperatures, synchronized light and temperature, and simultaneous rainfall and heat. Spring is dry and windy, summer is hot and rainy, autumn is sunny and crisp, and winter is cold with little snow. The city's annual average total solar radiation is 121.58 kcal/cm², with interannual variation between 112 and 131 kcal/cm². May has the highest solar radiation, and December has the lowest. Based on an 80% guarantee rate, the annual total radiation is 117.9 kcal/cm². During the crop growth and development period from March to November, there is 10.2 billion kcal/hectare of energy available for utilization.
Sunshine: Tai'an City has an annual average of 2627.1 hours of sunshine, with interannual variation between 2342.3 and 3413.5 hours. The sunshine percentage is approximately 58%. May and June, when wheat is in the grain-filling stage, have the highest sunshine hours, averaging around 268 hours per month.
Temperature: The annual average low temperature in Tai'an City is 12.9℃. The highest average temperature is July, at 26.4℃, while the lowest is January, averaging -2.6℃. The extreme maximum temperature is 41℃, and the extreme minimum temperature is -27.5℃. Geographically, temperatures are higher in the south and west, and lower in the east and north. The annual average accumulated temperature above 0℃ is 4731℃, and the accumulated temperature below 10℃ is 4213℃. The frost-free period averages 195 days, with a maximum of 241 days and a minimum of 161 days. Due to topography and landforms, vertical variations and regional differences have created several local microclimate zones. The average annual temperature at the summit of Mount Tai is only 5.2℃, while the annual precipitation reaches 1163.8 mm. The high-temperature zone at the foot of Mount Culaishan and along the Chaiwen River has an average annual temperature above 14℃, three to four degrees higher than the city average, reaching subtropical standards.
Precipitation: The average annual precipitation in Tai'an City is 697 mm. Due to the influence of the monsoon climate, annual precipitation varies greatly, with the maximum annual precipitation being 1498 mm and the minimum being 199 mm, a difference of 7.5 times. Due to topographical variations, precipitation is higher in the east than in the west, and higher in mountainous areas than in plains. The average annual precipitation in the eastern mountainous areas is 700-750 mm, while in the western plains it is 600-650 mm, with a general trend of decreasing from northeast to southwest. The distribution of precipitation throughout the year is very uneven, with summer receiving the most precipitation (65.2% of the annual total) and winter the least (3.6%). July has the most precipitation (32.1% of the annual total), with rain and heat occurring simultaneously, which is very beneficial for the growth and development of crops and fruit trees. January has the least precipitation (0.96%).