AGROCLIMATOGICAL
DATA 2000 |
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| 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 | |||||||||||||||