In 2024, the city’ s annual average temperature was 19.4 deg;C, 1.0 deg;C higher than the long-term average and 0.1 deg;C higher than 2022, ranking as the second highest in historical records and climatically assessed as significantly elevated. Annual average temperatures ranged from 19.0 deg;C (Hengshan, Hengdong) to 19.8 deg;C (Changning City), reflecting a pattern of higher temperatures in the south compared to the north. Compared to the long-term average, temperatures were 0.7 deg;C higher (Hengshan, Hengdong, Hengyang urban area) to 1.4 deg;C higher (Changning). At Nanyue Mountain Station, the average temperature was 13.2 deg;C, 1.2 deg;C higher than the long-term average.

    The annual extreme minimum temperatures across counties (cities, districts) ranged from -4 deg;C (Hengshan) to -1.4 deg;C (Changning City), while Nanyue Mountain recorded an extreme minimum of -12.2 deg;C. The annual extreme maximum temperatures in counties (cities, districts) varied from 38.2 deg;C (Hengshan) to 39.0 deg;C (Leiyang), with Nanyue Mountain’s extreme maximum temperature reaching 28.9 deg;C.

    In 2024, the city’ s annual average temperature was 19.4°C, 1.0°C higher than the long-term average, ranking as the second highest in historical records. Temperatures were normal in winter, spring, and summer, while autumn saw above-average warmth. The annual average number of high - temperature days was 52.1, 13.0 more than the long-term average. The city's annual average precipitation was 1186.17 mm, 12.7% less than the long-term average. Winter precipitation was scarce, while other seasons were normal. Despite reduced precipitation, rainfall distribution was relatively even, resulting in mild drought conditions. The annual average number of rainy days was 136.9, 20.5 days fewer than the long-term average. The annual average sunshine duration was 1518.9 hours, 83.8 hours more than the long-term average. Winter saw significantly more sunshine, while other seasons normal.

In 2023, the city’s annual average sunshine duration was 1,518.9 hours, 83.8 hours more than the long-term average but 151.3 hours fewer than the previous year. Across counties (cities, districts), sunshine hours ranged from 1,426.8 hours (Hengyang urban area) to 1,658.4 hours (Hengshan), with anomalies ranging from -56.6 hours (Hengyang urban area) to +238.2 hours (Hengshan). Nanyue Mountain recorded 1,344.2 hours of sunshine, 108.9 hours below its long-term average.

In 2023, the city’s annual average precipitation was 1,186.17 mm, 12.7% below the long-term average but 15% higher than the previous year. Precipitation across counties (cities, districts) ranged from 1,014.2 mm (Hengyang urban area) to 1,311.3 mm (Leiyang City). Compared to the long-term averages, precipitation anomalies ranged from -305.6 mm (Hengyang urban area) to -66.8 mm (Qidong), with percentage anomalies of -23.2% (Hengyang urban area) to -5.3% (Qidong), reflecting a pattern of higher precipitation in the central-north and lower in the south. Nanyue Mountain recorded 1,678.9 mm of precipitation, 345.1 mm (17.1%) below its long-term average.

The city’s annual average number of rainy days was 136.9, 20.5 days fewer than the long-term average but 1.1 days more than 2022. Rainy days in each county (city, district) ranged from 128 (Hengnan) to 150 (Changning), with deviation values of - 32.8 (Hengnan) to - 15.4 (Changning) compared to the same period. Nanyue Mountain had 194 rainy days, 3.9 above its long-term average.

    In 2022, the rainfall of Hengyang is 1421.7 mm, which is 6.2% more than the average (1339.1 mm) of the past several years, but the precipitation cab be categorized as a normal year. But the distribution of rainfall in time and space is extremely uneven, and the anomaly changes of which is the most significant one in the three main factors --temperature, precipitation and sunshine (the factors used to evaluate the quality of climate). In January, March, May and September, the regional precipitation changes little, most within 50%. The months in which the rainfall is extremely lower than normal, significantly lower than normal, significantly higher than normal and extremely higher than normal in accounted for 9.2%, 24.2%, 6.7% and 18.3% respectively. In October, the precipitation is significantly lower than normal, which is 79.3% less than normal over the years. And in this month, the precipitation of Hengyang is 4.7mm, which is the third lowest in the past 50 years. In December, the rainfall is abnormally high, for the average rainfall is 165.8mm, which is 304% more than the past several years and 244.2% more than last year at the same time. It is quite rare in history that rainfall in December is so abundant, and many measuring stations’ precipitations break the record of heavy monthly rainfall. On December 12th and 15th, there are two regional heavy rain process, and because of which the measuring of 11 stations have reached heavy rain standard. During the rainy season (April to September) of 2010, the cumulative rainfall is 978.9 mm, accounting for 68.9% of the total annual precipitation, which is 16.7% more than the same period in history (838.8 mm). The average annual number of rainy days is 157.1 days, which is 3.5 days less than normal of the same period in history.

In 2021, the rainfall of Hengyang is 1421.7 mm, which is 6.2% more than the average (1339.1 mm) of the past several years, but the precipitation cab be categorized as a normal year.  But the distribution of rainfall in time and space is extremely uneven, and the anomaly changes of which is the most significant one in the three main factors --temperature, precipitation and sunshine (the factors used to evaluate the quality of climate). In January, March, May and September, the regional precipitation changes little, most within 50%. The months in which the rainfall is extremely lower than normal, significantly lower than normal, significantly higher than normal and extremely higher than normal in accounted for 9.2%, 24.2%, 6.7% and 18.3% respectively. In October, the precipitation is significantly lower than normal, which is 79.3% less than normal over the years.  And in this month, the precipitation of Hengyang is 4.7mm, which is the third lowest in the past 50 years. In December, the rainfall is abnormally high, for the average rainfall is 165.8mm, which is 304% more than the past several years and 244.2% more than last year at the same time. It is quite rare in history that rainfall in December is so abundant, and many measuring stations’ precipitations break the record of heavy monthly rainfall. On December 12th and 15th, there are two regional heavy rain  process, and because of which the measuring of 11 stations have reached heavy rain standard. During the rainy season (April to September) of 2010, the cumulative rainfall is 978.9 mm, accounting for 68.9% of the total annual precipitation, which is 16.7% more than the same period in history (838.8 mm). The average annual number of rainy days is 157.1 days, which is 3.5 days less than normal of the same period in history.