1－4 Yearly Hydrometeorological Data（2004－2005）
Items | 2005 | 2004
Temperature:Average Annual Temperature | (oC) | 17.1 | 17.4
Annual Utmost highest Air Temperature | (oC) | 38.1 | 39.1
Date It Appeared | (Day/month) |
Annual Utmost Lowest Air Temperature | (oC) | -6.1 | -4.9
Date It Appeared | (Day/month) |
Precipitation:Total Annual Precipitation | (mm) | 948.2 | 1039.9
Annual number of heaviest Precipitation | (day) | 102 | 111
In one day the Heaviest Precipitation | （mm） | 79.3 | 77
Date It Appeared | (Day/month) |
Sunshine:Annual Sunshine Time | (hour) | 2091.5 | 2170.6
Annual Sunshine Percentage | (%) | 47 | 49
Average Annual Relative Humidity | (%) | 69 | 71
Average Annual Wind-force | (m/second) | 2.7 | 2.7
Average Annual Atmospheric Pressure | (millibar) |
Water Level:Peak level | (m) | 4.15 | 4.25
Date It Happened | (Day/month) |
Lowest Water Level | (m) | 2.93 | 2.92
Date It Happened | (Day/month) |
Annual Average Water Level | (m) | 3.31 | 3.25
Note: 1. Non-frost Season:230Days
2. Frost Season: The First Day: 11/21/2005, the Final Day:4/4/2005
3. Snow Season: The First Day: none, the Final Day：3/12/2005
4.Water Level is measured at Wuxi Nanmen Great Cannel. (Wusong basic level)