1－4 Yearly Hydro-Meteorological Data（2005－2006）
Items |  | 2006 | 2005
Temperature:Average Annual Temperature | (oC) | 17.7 | 17.1
Annual Utmost highest Air Temperature | (oC) | 38.1 | 38.1
Date It Appeared | (Day/month) | 6月21日 | 7月3日
Annual Utmost Lowest Air Temperature | (oC) | -4.4 | -6.1
Date It Appeared | (Day/month) | 1月8日 | 1月2日
Precipitation:Total Annual Precipitation | (mm) | 1096.9 | 948.2
Annual number of heaviest Precipitation | (day) | 129 | 102
In one day the Heaviest Precipitation | （mm） | 99.0 | 79.3
Date It Appeared | (Day/month) | 7月20日 | 9月12日
Sunshine:Annual Sunshine Time | (hour) | 1877.4 | 2091.5
Annual Sunshine Percentage | (%) | 42 | 47
Average Annual Relative Humidity | (%) | 70 | 69
Average Annual Wind-force | (m/second) | 2.5 | 2.7
Average Annual Atmospheric Pressure | (millibar) | 1015.3 | 1015.9
Water Level:Peak level | (m) | 3.92 | 4.15
Date It Happened | (Day/month) | 7月22日 | 8月7日
Lowest Water Level | (m) | 3.00 | 2.93
Date It Happened | (Day/month) | 11月16日 | 1月21日
Annual Average Water Level | (m) | 3.32 | 3.31
Note: 1. Non-frost Season:230Days.
2. Frost Season: The First Day: 11/15/2006, the Final Day:3/29/2006.
3. Snow Season: The First Day: none, the Final Day：3/1/2006.
4.Water Level is measured at Wuxi Nanmen Great Cannel. (Wusong basic level).