Weather Conditions - On October 5, the minimum temperature in Suzhou was 24.2℃, with a maximum temperature reaching 34.3℃ by 4 PM, indicating a hot and humid day [1] - October 6 is expected to be cloudy with temperatures rising slightly, providing decent conditions for moon viewing during the Mid-Autumn Festival [1] Typhoon Impact - Typhoon "Maidam" made landfall as a strong typhoon in the eastern coastal area of Xuwen County, Guangdong Province, around 2:50 PM on October 5 [1] - The core impact of "Maidam" is expected from October 5 to 6, bringing heavy rain and strong winds to regions including Hainan, Guangdong, Guangxi, and Yunnan, with some areas experiencing extreme rainfall [1] Forecast and Air Quality - The Suzhou Meteorological Station forecasts cloudy weather from the night of October 5 to the morning of October 6, with an east wind of 3 to 4 levels [1] - The minimum temperature on the morning of October 6 is expected to be around 25℃, with a maximum of about 35℃ during the day [1] - Air quality in Suzhou is reported as excellent during the night of October 5 to the morning of October 6, and good in the afternoon of October 6 [1]

随着冷空气活动的增强，假期后半段，我国北方大部地区将迎来明显降温，华北大部最高气温将不 足15℃，秋凉加重；而南方炎热持续，江南中东部、华南北部等地高温天气不下线。另外，随着台 风"麦德姆"不断靠近，华南至云南等地将陆续进入台风雨核心影响时段，风雨明显。由于副热带高压西 伸加强，苏州未来3天气温有所上升，最高气温在33℃左右，热力不减。 苏州10月4日早晨南部地区有阵雨飘落，局部地区小时雨量较大。10月4日早晨的最低气温为 22.7℃，白天以云系变化为主，云厚地区仍有短时阵雨，截至下午4时，最高气温为28.5℃，湿度增大， 体感有些闷热。 苏州市气象台预计，10月4日夜里多云有时阴。10月5日多云。东风3～4级。10月5日早晨的最低气 温在25℃左右，白天最高气温在33℃左右，紫外线照射强度中等，注意防晒。预计10月6日仍以多云天 气为主，气温在26℃～34℃之间。苏州10月4日夜里到5日上午的空气质量为优，10月5日下午为良。 ...

人民财讯9月30日电，生态环境部发布10月上半月全国空气质量预报会商结果。10月上半月，受降水和 冷空气影响，整体扩散条件较好，全国大部空气质量以优良为主，局地可能出现轻度污染，首要污染物 为O3或PM2.5。受沙尘天气影响，甘肃河西地区、宁夏、青海及内蒙古西部可能出现轻度污染，新疆南 部可能出现中度污染。 ...

Core Insights - The Ministry of Ecology and Environment reported that the average PM2.5 concentration in 339 cities was 14.5 micrograms per cubic meter in July, representing an 8.2% year-on-year decrease [1] - The average number of days with good air quality was 93.0%, an increase of 1.0 percentage points year-on-year [1] Group 1: National Air Quality - PM2.5 average concentration in 339 cities: 14.5 micrograms per cubic meter, down 8.2% year-on-year [1] - PM10 average concentration: 28 micrograms per cubic meter, down 3.4% year-on-year [1] - Average days with good air quality: 93.0%, up 1.0 percentage points year-on-year [1] - Average days with severe pollution: 0.2%, down 0.1 percentage points year-on-year [1] Group 2: Regional Air Quality - Beijing-Tianjin-Hebei region PM2.5 average concentration: 18.3 micrograms per cubic meter, down 21.1% year-on-year [1] - Average days with good air quality in this region: 75.7%, down 4.6 percentage points year-on-year [1] - Beijing's PM2.5 concentration: 18.3 micrograms per cubic meter, down 31.2% year-on-year [1] - Average days with good air quality in Beijing: 83.9%, up 16.2 percentage points year-on-year [1] Group 3: Yangtze River Delta and Fenwei Plain - Yangtze River Delta PM2.5 average concentration: 14.6 micrograms per cubic meter, down 3.9% year-on-year [1] - Average days with good air quality in the Yangtze River Delta: 87.8%, down 5.9 percentage points year-on-year [1] - Fenwei Plain PM2.5 average concentration: 18.5 micrograms per cubic meter, down 20.6% year-on-year [1] - Average days with good air quality in the Fenwei Plain: 82.1%, up 14.1 percentage points year-on-year [1]

Core Insights - The average PM2.5 concentration in 339 cities in July was 14.5 micrograms per cubic meter, representing an 8.2% year-on-year decrease [1] - The average PM10 concentration was 28 micrograms per cubic meter, down 3.4% year-on-year [1] - The proportion of days with good air quality was 93.0%, an increase of 1.0 percentage points year-on-year [1] - The proportion of days with heavy pollution or worse was 0.2%, a decrease of 0.1 percentage points year-on-year [1] Regional Analysis - In the Beijing-Tianjin-Hebei region, the average PM2.5 concentration was 18.3 micrograms per cubic meter, down 21.1% year-on-year, with no days of heavy pollution reported [1] - The PM2.5 concentration in Beijing specifically was 18.3 micrograms per cubic meter, reflecting a 31.2% year-on-year decrease [1] - In the Yangtze River Delta region, the average PM2.5 concentration was 14.6 micrograms per cubic meter, down 3.9% year-on-year, with no days of heavy pollution [1] - In the Fenwei Plain region, the average PM2.5 concentration was 18.5 micrograms per cubic meter, down 20.6% year-on-year, with an 82.1% good air quality day ratio, up 14.1 percentage points year-on-year [1] City Rankings - Among 168 key cities, the top 20 cities with the best air quality included Huangshan, Haikou, Lishui, and Fuzhou [2] - The bottom 20 cities with the poorest air quality included Yangquan, Jiaozuo, and Luliang [2]

Group 1 - The average proportion of days with good air quality in China's cities at the prefecture level and above was 93.0% in July, an increase of 1.0 percentage points year-on-year [1] - The average concentration of PM2.5 in July was 14.5 micrograms per cubic meter, a decrease of 8.2% year-on-year, while the average concentration of PM10 was 28 micrograms per cubic meter, down 3.4% year-on-year [1] - The proportion of days with heavy pollution or worse was 0.2%, a decrease of 0.1 percentage points year-on-year [1] Group 2 - In the Beijing-Tianjin-Hebei region and surrounding areas, the average PM2.5 concentration was 18.3 micrograms per cubic meter, a decrease of 21.1% year-on-year, with an average good air quality days proportion of 75.7%, down 4.6 percentage points year-on-year [1] - The PM2.5 concentration in Beijing was 18.3 micrograms per cubic meter, a decrease of 31.2% year-on-year [1] - In the Fenwei Plain, the average PM2.5 concentration was 18.5 micrograms per cubic meter, a decrease of 20.6% year-on-year, with an average good air quality days proportion of 82.1%, an increase of 14.1 percentage points year-on-year [1] Group 3 - Among 168 key cities, the top 20 cities with the best air quality included Huangshan, Haikou, Lishui, and Fuzhou [2] - The bottom 20 cities with the worst air quality included Yangquan, Jiaozuo, and Luliang [2]

Group 1 - The average PM2.5 concentration in 339 cities was 14.5 micrograms per cubic meter in July, showing a year-on-year decrease of 8.2% [1] - The average PM10 concentration was 28 micrograms per cubic meter, down 3.4% year-on-year [1] - The average O3 concentration increased to 138 micrograms per cubic meter, reflecting a year-on-year rise of 4.5% [1] - The average SO2 concentration was 6 micrograms per cubic meter, with a year-on-year decrease of 14.3% [1] - The average NO2 concentration was 11 micrograms per cubic meter, down 8.3% year-on-year [1] - The average CO concentration was 0.6 milligrams per cubic meter, showing a year-on-year decrease of 14.3% [1] - The proportion of days with good air quality was 93.0%, an increase of 1.0 percentage points year-on-year [1] - The proportion of days with heavy pollution was 0.2%, a decrease of 0.1 percentage points year-on-year [1] - The average number of days exceeding standards due to dust storms was 0.6%, with heavy pollution days at 0.2% [1] Group 2 - Among 168 key cities, the top 20 cities with the best air quality included Huangshan, Haikou, and Lishui [2] - The bottom 20 cities with the worst air quality included Yangquan, Jiaozuo, and Luliang [2] - The top 20 cities with the lowest PM2.5 concentrations included Lishui, Zhoushan, and Dazhou [2] - The bottom 20 cities with the highest PM2.5 concentrations included Hebi, Tangshan, and Suizhou [2]

Core Insights - The Ministry of Ecology and Environment reported that in July 2025, the average proportion of days with good air quality across 339 cities was 93.0%, an increase of 1.0 percentage points year-on-year [1] - The proportion of days with heavy pollution or worse was 0.2%, a decrease of 0.1 percentage points compared to the previous year [1] - The average number of days exceeding air quality standards due to sandstorms was 0.6%, with heavy pollution days accounting for 0.2% of this total [1]

Air Quality Overview - In June, the average PM2.5 concentration across 339 cities was 16.3 µg/m³, a year-on-year decrease of 4.7% [2] - The average PM10 concentration was 33 µg/m³, down 5.7% year-on-year [2] - The average O3 concentration was 153 µg/m³, an increase of 0.7% year-on-year [2] - The proportion of days with good air quality was 84.0%, up 5.7 percentage points year-on-year [2] - The proportion of days with heavy pollution was 0.2%, unchanged year-on-year [2] Year-to-Date Air Quality - From January to June, the average PM2.5 concentration was 32.1 µg/m³, a decrease of 2.4% year-on-year [2] - The average PM10 concentration remained stable at 55 µg/m³ [2] - The average NO2 concentration was 20 µg/m³, down 4.8% year-on-year [2] - The average CO concentration was 1.0 mg/m³, a decrease of 9.1% year-on-year [2][3] Key Regions Analysis Beijing-Tianjin-Hebei Region - In June, the average PM2.5 concentration was 24.2 µg/m³, down 11.7% year-on-year [7] - The average O3 concentration was 213 µg/m³, a decrease of 3.6% year-on-year [7] - The proportion of good air quality days was 46.5%, an increase of 26.9 percentage points year-on-year [7] Yangtze River Delta Region - In June, the average PM2.5 concentration was 18.1 µg/m³, down 10.8% year-on-year [9] - The average O3 concentration was 176 µg/m³, a decrease of 11.6% year-on-year [9] - The proportion of good air quality days was 76.0%, an increase of 15.7 percentage points year-on-year [9] Fenwei Plain - In June, the average PM2.5 concentration was 20.4 µg/m³, down 17.4% year-on-year [11] - The average O3 concentration was 197 µg/m³, a decrease of 3.9% year-on-year [11] - The proportion of good air quality days was 49.2%, an increase of 15.3 percentage points year-on-year [11] Key Cities Performance - Among 168 key cities, the top 20 cities with the best air quality included Lhasa, Haikou, and Zhangjiakou [12] - The bottom 20 cities with the poorest air quality included Xianyang, Xi'an, and Kaifeng [12] - The cities with the most significant improvement in air quality included Xinzhou, Hohhot, and Baotou [12][13]

Core Viewpoint - The overall air quality in China for the second half of June is expected to be predominantly good, with some regions experiencing moderate pollution due to high temperatures and dust storms [1][2]. Group 1: National Air Quality Forecast - The air diffusion and wet removal conditions across the country are generally favorable, leading to good air quality in most areas [1]. - The Beijing-Tianjin-Hebei region and surrounding areas may experience light to moderate pollution due to high temperatures, particularly from June 17 to 30 [1]. - Dust storms may cause moderate or higher pollution levels in eastern and southern Xinjiang during certain periods [1]. Group 2: Beijing Air Quality Forecast - In Beijing, the air quality is expected to be good for most of the second half of June, with some periods of light ozone pollution [2]. - From June 18 to 25, average diffusion conditions are expected, leading to light pollution from ozone [2]. - The primary pollutant in Beijing during this period is expected to be ozone (O3) [2].