AGROCLIMATOGICAL DATA 2000
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 35.1 37.5 37.3 38.4 36.7 35.0 36.1 35.8 35.5 34.8 33.0 34.4 38.4
  Date 12 24 14,7 3 9 7 30 13,2 26 20 30 2 3-Apr
  Mean Maximum 32.9 33.8 34.9 34.7 34.6 33.2 33.8 33.3 33.1 32.2 30.2 31.7 33.2
  Mean 26.8 27.1 28.8 29.7 29.8 29.0 29.2 29.1 28.8 28.2 26.0 26.7 28.3
  Mean Minimum 20.6 20.3 22.7 24.7 24.9 24.7 24.5 24.8 24.4 24.2 21.8 21.7 23.3
  Extreme Minimum 17.4 14.9 17.5 23.0 23.9 23.5 23.0 23.3 23.5 22.8 17.0 16.1 14.9
  Date 29 3 16 13 5 21 22 4 10 3 6 25 3-Feb
  Grass minimumtemperature (celcuis) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean Minimum 17.9 17.6 20.5 23.9 23.9 24.0 23.2 23.3 23.1 23.2 19.6 18.6 21.6
  Extreme Minimum 13.9 10.0 14.0 22.5 22.4 22.0 21.5 21.6 21.0 21.6 13.0 11.1 10.0
  Date 29 4 16 1 28 29 19 20 18 9 6 25 4-Feb
  Water temperature (celcuis) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean Maximum 31.4 32.5 33.8 35.9 35.9 34.8 33.8 34.7 34.3 34.5 31.3 31.5 33.7
  Mean 26.0 26.5 28.4 30.6 30.6 30.0 29.2 29.6 29.5 29.6 26.5 26.4 28.6
  Mean Minimum 20.6 20.4 23.0 25.3 25.3 25.1 24.6 24.4 24.6 24.6 21.6 21.2 23.4
  Relative humidity ( % ) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Extreme Maximum 93 97 98 98 95 98 98 96 97 98 95 - 98
  Mean Maximum 87 91 92 94 92 94 93 94 93 93 93 - 92
  Mean 61 63 64 72 70 74 71 73 72 75 67 - 69
  Mean Minimum 35 35 36 49 48 54 48 51 51 57 41 - 46
  Extreme Minimum 10 15 10 26 34 44 35 38 34 44 40 - 10
  Date 17 5 13 3 8 11 30 2 16 20 1    
  Soil temperature (celcuis) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean at surface 29.3 30.0 31.4 32.2 31.8 30.6 30.3 30.6 30.2 30.3 28.7 30.3 30.5
  Mean at 5 cm 29.1 29.8 31.8 32.6 32.2 30.9 30.4 30.7 30.0 30.5 28.6 29.8 30.6
  Mean at 10 cm 29.4 30.1 32.0 32.8 32.4 31.1 30.5 30.9 30.4 30.5 28.6 29.9 30.7
  Mean at 20 cm 28.4 29.1 31.2 32.1 31.9 30.8 30.0 30.4 29.8 29.8 27.8 29.1 30.0
  Mean at 50 cm 29.8 30.3 32.3 33.7 33.9 32.6 31.7 32.6 32.0 32.0 30.4 31.2 31.9
  Mean at 100 cm - - - - - - - - - - - - -
  Rainfall ( mm ) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Total amount 0.2 16.0 17.2 152.8 82.4 77.9 53.1 116.8 109.6 405.4 6.5 0.0 1037.9
  Number of rainy day 1 1 3 13 19 18 15 14 18 15 3 0 120
  Greatest in 24 hr 0.2 16.0 12.7 36.6 33.5 23.2 19.8 47.2 16.7 114.8 3.5 0.0 114.8
  Date 19 26 1 14 31 3 29 3 15 16 25 31,1  
  Evaporation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Mean 4.3 5.0 5.3 4.7 5.2 4.1 4.8 4.7 4.2 3.9 4.4 4.5 4.6
  Wind Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Prevailing direction n se se se w s,w w w w nw n n  
  Mean speed ( m/s ) 0.9 0.8 1.0 0.6 0.7 0.7 1.0 0.8 0.8 0.5 1.6 1.3  
  Sunshine duration ( hr ) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
  Extreme Maximum 9.7 10.0 10.5 10.3 11.4 8.6 10.3 10.1 9.4 10.0 10.3 9.8 11.4
  Date 24 6,1 17 9 9 13,7 30 12,11 18 20 6,5 19,5  
  Mean 7.8 8.2 7.2 6.5 6.8 4.4 4.3 4.7 4.0 5.1 7.2 7.3 6.1
Remark : "-" indicate missing data Argometeorological analysis sub-division , Agrometeorology division data
processing sub-division , Climatology division meteorological department