AGROCLIMATOGICAL
DATA 1993 |
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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 | 34.5 | 35.8 | 38.7 | 39.7 | 39.5 | 36.7 | 36.8 | 34.7 | 34.3 | 36.2 | 33.7 | 33.7 | 39.7 | ||
| Date | 14,26 | 27 | 27 | 4 | 1 | 4,6 | 27 | 27 | 8,25 | 4 | 16 | 3 | 4-Apr | ||
| Mean Maximum | 32.2 | 33.3 | 34.8 | 36.4 | 35.7 | 34.6 | 34.1 | 32.8 | 32.6 | 30.8 | 31.4 | 29.3 | 33.2 | ||
| Mean | 26.2 | 26.5 | 29.2 | 30.5 | 30.5 | 29.9 | 29.4 | 28.7 | 28.5 | 27.5 | 26.8 | 24.2 | 28.2 | ||
| Mean Minimum | 20.3 | 19.8 | 23.5 | 24.6 | 25.2 | 25.2 | 24.7 | 24.6 | 24.4 | 24.1 | 22.1 | 19.2 | 23.1 | ||
| Extreme Minimum | 13.2 | 15.2 | 22.1 | 22.0 | 24.0 | 23.8 | 23.8 | 23.4 | 23.0 | 22.4 | 17.5 | 12.6 | 12.6 | ||
| Date | 31 | 1 | 4 | 14 | 1 | 15 | 11 | 5 | 23 | 31 | 4 | 27 | 27-Dec | ||
| Grass minimumtemperature (celcuis) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean Minimum | 19.0 | 18.2 | 22.7 | 23.8 | 24.6 | 24.5 | 23.9 | 23.9 | 23.7 | 23.8 | 20.9 | 18.0 | 22.2 | ||
| Extreme Minimum | 11.0 | 13.0 | 21.0 | 21.5 | 22.5 | 23.2 | 23.0 | 22.6 | 22.2 | 22.5 | 16.2 | 10.6 | 10.6 | ||
| Date | 31 | 1 | 4,28 | 14 | 1 | 21 | 11,24 | 5 | 23 | 21 | 4 | 27 | 27-Dec | ||
| Water temperature (celcuis) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean Maximum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Mean | 25.7 | 26.3 | 29.2 | 30.4 | 30.5 | 30.1 | 29.5 | 28.6 | 29.2 | 27.9 | 26.8 | 23.5 | 28.1 | ||
| Mean Minimum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Relative humidity ( % ) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Extreme Maximum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Mean Maximum | 68 | 64 | 63 | 65 | 67 | 73 | 74 | 76 | 77 | 84 | 74 | 71 | 71 | ||
| Mean | 92 | 94 | 96 | 91 | 90 | 94 | 95 | 95 | 95 | 95 | 95 | 92 | 94 | ||
| Mean Minimum | 43 | 38 | 43 | 39 | 44 | 52 | 54 | 57 | 59 | 72 | 52 | 50 | 50 | ||
| Extreme Minimum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Date | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Soil temperature (celcuis) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean at surface | 29.6 | 30.5 | 33.2 | 35.1 | 33.9 | 31.7 | 31.4 | 29.6 | 29.9 | 28.9 | 29.9 | 27.2 | 30.9 | ||
| Mean at 5 cm | 30.0 | 30.6 | 33.3 | 35.2 | 34.2 | 32.0 | 31.8 | 30.1 | 30.4 | 29.2 | 30.1 | 27.6 | 31.2 | ||
| Mean at 10 cm | 30.0 | 30.4 | 32.9 | 34.5 | 33.6 | 31.7 | 31.4 | 29.8 | 30.2 | 29.2 | 30.0 | 27.7 | 31.0 | ||
| Mean at 20 cm | 29.8 | 30.1 | 32.6 | 34.3 | 33.9 | 32.0 | 31.3 | 30.0 | 30.2 | 29.2 | 29.7 | 27.7 | 30.9 | ||
| Mean at 50 cm | 30.0 | 30.2 | 32.6 | 34.6 | 34.4 | 32.7 | 32.2 | 31.0 | 30.7 | 29.5 | 30.1 | 29.0 | 31.4 | ||
| Mean at 100 cm | 31.4 | 31.4 | 33.5 | 35.2 | 35.5 | 34.2 | 33.4 | 32.4 | 32.1 | 31.1 | 31.8 | 31.5 | 32.8 | ||
| Rainfall ( mm ) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Total amount | 8.0 | 0.0 | 53.2 | 11.4 | 122.1 | 111.9 | 59.5 | 141.8 | 203.2 | 243.5 | 23.6 | 24.5 | 1002.7 | ||
| Number of rainy day | 4 | 0 | 6 | 2 | 11 | 18 | 10 | 15 | 23 | 30 | 4 | 3 | 126 | ||
| Greatest in 24 hr | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Date | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Evaporation | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Mean | 138.4 | 155.3 | 178.2 | 197.0 | 186.3 | 168.4 | 178.5 | 131.9 | 148.3 | 97.3 | 127.5 | 145.4 | 1852.5 | ||
| Wind | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Prevailing direction | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Mean speed ( m/s ) | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Sunshine duration ( hr ) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | ||
| Extreme Maximum | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Date | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Mean | 7.0 | 8.5 | 7.9 | 7.8 | 6.7 | 5.4 | 5.8 | 3.0 | 4.7 | 3.7 | 7.8 | 6.9 | 6.3 | ||
| Remark : "-" indicate missing data | Argometeorological analysis sub-division , Agrometeorology division data | ||||||||||||||
| processing sub-division , Climatology division meteorological department | |||||||||||||||