| AGROCLIMATOGICAL DATA 2002 | |||||||||||||||
| 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 | 34.9 | 36.7 | 37.1 | 39.2 | 38.5 | 35.4 | 36.0 | 34.5 | 34.1 | 35.5 | 34.4 | 34.5 | 39.2 | ||
| Date | 25 | 28 | 25 | 17 | 5 | 15 | 11,12 | 1,24 | 30 | 1 | 15 | 7,20 | 17-Apr | ||
| Mean Maximum | 32.1 | 34.7 | 35.0 | 37.2 | 34.5 | 34.0 | 34.2 | 32.8 | 32.1 | 32.3 | 30.9 | 32.2 | 33.5 | ||
| Mean | 26.0 | 28.4 | 29.5 | 31.0 | 29.8 | 29.5 | 29.6 | 28.8 | 28.3 | 28.2 | 27.2 | 27.6 | 28.7 | ||
| Mean Minimum | 19.8 | 22.0 | 24.0 | 24.7 | 25.1 | 25.0 | 25.0 | 24.7 | 24.5 | 24.0 | 23.4 | 23.1 | 23.8 | ||
| Extreme Minimum | 16.5 | 19.9 | 20.1 | 23.2 | 23.4 | 23.6 | 23.9 | 23.5 | 23.4 | 21.6 | 20.5 | 20.6 | 16.5 | ||
| Date | 4 | 2 | 8 | 12 | 21 | 23 | 20 | 21 | 23 | 11 | 6 | 29 | 4-Jan | ||
| Grass minimumtemperature (celcuis) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean Minimum | 17.8 | 20.2 | 22.7 | 23.4 | 24.4 | 24.3 | 23.8 | 24.0 | 23.8 | 23.2 | 21.7 | 21.3 | 22.6 | ||
| Extreme Minimum | 13.5 | 17.5 | 20.0 | 21.1 | 23.0 | 23.0 | 22.0 | 23.0 | 22.6 | 20.8 | 16.5 | 19.0 | 13.5 | ||
| Date | 3 | 1 | 8 | 11 | 21,28 | 29 | 20 | 4 | 15 | 11 | 6 | 20,29 | 3-Jan | ||
| Water temperature (celcuis) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean Maximum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Mean | 25.6 | 28.3 | 29.8 | 31.2 | 30.0 | 30.3 | 29.6 | 29.2 | 29.6 | 29.3 | 27.9 | 28.0 | 29.1 | ||
| Mean Minimum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Relative humidity ( % ) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Extreme Maximum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Mean Maximum | - | - | - | - | - | - | 92 | 93 | 93 | 95 | 92 | 93 | 93 | ||
| Mean | - | - | - | - | - | - | 72 | 74 | 76 | 76 | 75 | 72 | 74 | ||
| Mean Minimum | - | - | - | - | - | - | 52 | 54 | 59 | 56 | 58 | 55 | 56 | ||
| Extreme Minimum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Date | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Soil temperature (celcuis) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean at surface | 28.7 | 31.8 | 32.8 | 34.8 | 31.5 | 30.4 | 30.6 | 29.3 | 29.4 | 29.7 | 28.8 | 29.4 | 30.6 | ||
| Mean at 5 cm | 28.2 | 31.1 | 32.4 | 35.2 | 32.3 | 30.7 | 30.7 | 29.7 | 29.8 | 30.0 | 28.9 | 29.2 | 30.7 | ||
| Mean at 10 cm | 28.6 | 31.4 | 32.7 | 35.3 | 32.6 | 31.1 | 31.2 | 29.9 | 30.0 | 30.2 | 29.0 | 29.4 | 31.0 | ||
| Mean at 20 cm | 27.7 | 30.2 | 31.5 | 34.3 | 32.0 | 30.7 | 30.6 | 29.4 | 29.3 | 29.4 | 28.3 | 28.8 | 30.2 | ||
| 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 | 0.0 | 0.0 | 25.0 | 3.1 | 123.6 | 195.1 | 45.0 | 111.8 | 240.0 | 182.4 | 123.1 | 18.2 | 1067.3 | ||
| Number of rainy day | 0 | 0 | 2 | 4 | 14 | 19 | 9 | 18 | 14 | 12 | 8 | 3 | 103 | ||
| Greatest in 24 hr | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Date | - | - | - | - | - | - | - | - | - | - | - | - | |||
| Evaporation | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean | 129.7 | 128.0 | 150.6 | 189.2 | 152.7 | 135.4 | 153.9 | 129.8 | 125.7 | 116.3 | 105.3 | 108.6 | 1625.2 | ||
| Wind | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Prevailing direction | 1/N | 1/SE | 1/S | 1/SE | 1/S | 1/W | 1/W | 1/W | 1/W | 1/N | 1/N | 1/N | 1/NW | ||
| Mean speed ( m/s ) | - | - | - | - | - | - | - | - | - | - | - | - | |||
| Sunshine duration ( hr ) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Extreme Maximum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Date | - | - | - | - | - | - | - | - | - | - | - | - | |||
| Mean | 7.5 | 8.2 | 7.7 | 8.7 | 5.3 | 5.2 | 4.4 | 3.1 | 4.1 | 6.2 | 5.7 | 6.5 | 6.1 | ||
| Remark : "-" indicate missing data | Argometeorological analysis sub-division , Agrometeorology division data | ||||||||||||||
| processing sub-division , Climatology division meteorological department | |||||||||||||||