AGROCLIMATOGICAL DATA 2004
Station     : Ratchaburi Elevation of station above MSL 5.00  m.
Latitude    : 13.5 N Hight of thermometer above ground - m.
Longtitude : 99.8 E Hight of wind vane above ground  - m.
Hight of rain gauge - m.
  Air temerature (celcuis) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Extreme Maximum 35.6 37.0 39.0 40.0 38.0 35.7 37.0 36.3 35.7 33.5 35.6 33.5 40.0
  Date 31 3 24 18 2 6 7 23 12 30 11 26 18-Apr
  Mean Maximum 32.5 33.6 35.8 37.8 33.6 33.2 34.4 33.7 32.6 31.6 32.7 31.4 33.6
  Mean 26.4 27.0 29.8 31.2 34.3 28.9 29.6 29.3 28.6 27.7 27.8 24.8 28.8
  Mean Minimum 20.4 20.5 23.8 24.6 25.0 24.6 24.7 24.8 24.5 23.7 22.8 18.2 23.1
  Extreme Minimum 16.9 16.5 19.2 21.6 23.0 23.0 22.0 24.2 22.9 21.5 18.9 15.6 15.6
  Date 26 16 3 17 23 18,26 9 6 19 27 22 21 21-Dec
  Grass minimumtemperature (celcuis) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean Minimum 19.3 19.6 23.0 23.8 24.6 24.1 24.4 24.3 - - - - 22.9
  Extreme Minimum 16.0 15.4 18.5 20.5 22.2 22.5 23.5 23.0 - - - - 15.4
  Date 26 17 3 17 23 19 9,14 14 - - - - 17-Feb
  Water temperature (celcuis) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean Maximum - - - - - - - - - - - - -
  Mean 26.1 27.0 29.4 31.0 31.4 - - - - - - - 29.0
  Mean Minimum - - - - - - - - - - - - -
  Relative humidity ( % ) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Extreme Maximum - - - - - - - - - - - - -
  Mean Maximum 90 88 91 92 92 94 93 94 93 95 90 88 92
  Mean 66 63 66 66 73 75 72 74 76 77 69 63 70
  Mean Minimum 41 37 41 39 54 56 50 53 58 59 47 37 48
  Extreme Minimum - - - - - - - - - - - - -
  Date - - - - - - - - - - - - -
  Soil temperature (celcuis) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean at surface 27.9 29.4 31.8 34.4 30.3 29.6 30.4 29.9 28.9 28.8 30.4 27.3 29.9
  Mean at 5 cm 28.7 30.1 32.6 35.4 31.1 30.2 30.6 30.4 29.6 29.3 30.9 27.8 30.6
  Mean at 10 cm 28.4 29.9 32.3 35.2 31.2 30.3 30.8 30.5 29.8 29.4 30.9 27.9 30.6
  Mean at 20 cm 28.4 30.0 31.9 35.1 34.7 34.5 - - - - - - 32.4
  Mean at 50 cm - - - - - - - - - - - - -
  Mean at 100 cm - - - - - - - - - - - - -
  Rainfall ( mm ) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Total amount 5.6 10.9 10.9 10.8 219.5 57.7 60.9 69.5 344.6 173.7 4.0 0.0 968.1
  Number of rainy day 3 2 1 1 18 15 13 16 22 13 2 0 106
  Greatest in 24 hr - - - - - - - - - - - - -
  Date - - - - - - - - - - - -  
  Evaporation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean 119.5 142.4 182.3 205.6 146.7 124.9 180.6 157.8 96.5 114.5 140.6 145.4 1756.8
  Wind Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Prevailing direction 1/N 1/SE 1/SE 1/SE 0/C 1/SW 1/W 1/W 1/SE 1/SE 1/N 2/N 1/SE
  Mean speed ( m/s ) - - - - - - - - - - - -  
  Sunshine duration ( hr ) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Extreme Maximum - - - - - - - - - - - - -
  Date - - - - - - - - - - - -  
  Mean 7.2 8.5 7.9 9.3 5.4 4.9 5.1 4.0 3.8 6.3 8.0 8.9 6.6
Remark : "-" indicate missing data Argometeorological analysis sub-division , Agrometeorology division data
processing sub-division , Climatology division meteorological department