1-4Yearly Hydrometeorological Data
Items | 2002 | 2001
Temperature:Average Annual Temperature | (oC) | 16.9 | 16.6
Annual hignest Temperature | (oC) | 31.9 | 37.7
Date Appeared | (Day/month) | 15-Jul | 2-Jul
Annual Lowest Temperature | (oC) | -3.8 | -5.3
Date It Appeared | (Day/month) | 28-Dec | 26-Dec
Precipitation:Total Annual Precipitation | (mm) | 13329 | 1263.7
Annual number of heaviest Precipitation | (day) | 125 | 117
In one day the Heaviest Precipitation |  | 108.2 | 110.8
Date It Appeared | (Day/month) | 20-Jun | 23-Jun
Sunshine:Annual Sunshine Time | (hour) | 20121 | 1867.2
Annual Sunshine Percentage | (%) | 45 | 42
Average Annual Relative Humidity | (%) | 77 | 77
Average Annual Wind-force | (m/second) | 2.9 | 2.9
Average Annual Atmospheric Pressure | (millibar) | 1015.7 | 1015.6
Water Level:Peak level | (m) | 4.22 | 4.09
Date It Happened | (Day/month) | 21-Jun | 24-Jun
Lowest Water Level | (m) | 2.95 | 2.85
Date It Happened | (Day/month) | 23-Jan | 20-Apr
Annual Average Water Level | (m) | 3.35 | 3.26
Note: 1. Non-frost Season: 249Days
2. Frost Season: The First Day: 11/2/2002, the Final Day: 2/25/2002
3. Snow Season: The First Day: 12/25/2002, the Final Day: 1/18/2002
4.Water Level is measured at Wuxi Nanmen Great Cannel. (Wusong basic level)