AGROCLIMATOGICAL DATA 2011
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 temperature (celcuis)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Extreme Maximum	32.5	35.7	36.6	37.2	37.5	35.4	35.3	35.0	34.5	33.0	33.6	32.5	37.5
Date	24	19	6	18	4	9	9	24	18	1	29	1	4-May
Mean Maximum	30.3	33.7	30.4	34.5	34.5	33.0	32.9	32.4	32.4	31.0	31.3	29.2	32.1
Mean	25.3	28.0	26.6	29.5	29.9	29.3	28.8	28.7	28.7	27.7	27.2	25.0	27.9
Mean Minimum	20.2	22.2	22.7	24.5	25.3	25.5	24.7	25.0	25.0	24.3	23.0	20.7	23.6
Extreme Minimum	16.5	19.0	17.4	22.0	24.0	23.8	23.5	23.6	24.5	23.0	21.6	16.7	16.5
Date	18	5	17	1	21	23	4	13	3	5	30	12	18-Jan
Grass minimumtemperature (celcuis)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean	17.5	19.8	21.7	23.2	24.1	23.9	23.4	23.5	23.5	23.2	21.3	19.0	22.0
Extreme Minimum	13.9	15.6	16.5	20.0	22.0	21.6	22.2	21.6	22.1	21.9	19.4	14.6	13.9
Date	1	5	18	1	21	23	5	23	4	19	30	13	1-Jan
Water temperature (celcuis)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean Maximum	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean Minimum	-	-	-	-	-	-	-	-	-	-	-	-	-
Relative humidity ( % )	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Extreme Maximum	-	-	-	-	-	-	-	-	-	-	-	-	-
Mean Maximum	90.0	91.0	90.0	94.0	98.0	99.0	98.0	98.0	97.0	98.0	95.0	90.0	95.0
Mean	69.0	68.0	75.0	73.0	76.0	79.0	78.0	78.0	79.0	82.0	75.0	71.0	75.0
Mean Minimum	48.0	45.0	61.0	51.0	54.0	58.0	57.0	58.0	61.0	66.0	55.0	51.0	55.0
Extreme Minimum	-	-	-	-	-	-	-	-	-	-	-	-	-
Date	-	-	-	-	-	-	-	-	-	-	-	-	-
Soil temperature (celcuis)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean at surface	25.8	30.0	28.3	30.8	30.5	29.2	28.6	28.3	28.4	27.7	27.4	25.1	28.3
Mean at 5 cm	26.6	29.9	29.1	31.2	31.4	30.2	29.6	29.3	29.3	28.7	19.4	0.0	26.2
Mean at 10 cm	26.5	29.7	29.1	31.1	31.1	30.1	29.4	29.0	29.1	28.6	28.7	26.8	29.1
Mean at 20 cm	26.7	29.6	29.4	31.3	31.6	30.4	29.6	29.4	29.2	28.8	28.7	26.8	29.3
Mean at 50 cm	27.4	30.2	30.4	31.8	32.5	31.1	30.5	30.2	29.9	29.5	29.2	27.4	30.0
Mean at 100 cm	27.9	30.0	30.4	21.3	26.4	9.8	30.5	29.1	30.0	29.5	29.2	26.4	26.7
Rainfall ( mm )	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total amount	4.1	4.1	50.2	52.7	130.4	37.5	140.8	99.5	109.9	267.4	-	8.4	905.0
Number of rainy day	1	2	9	6	16	15	23	20	21	23	0	2	138
Greatest in 24 hr	-	-	-	-	-	-	-	-	-	-	-	-	-
Date	-	-	-	-	-	-	-	-	-	-	-	-
Evaporation	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean	135.9	134.4	122.8	164.7	166.7	130.6	147.1	137.6	130.7	97.4	132.1	150.8	1,650.8
Wind	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Prevailing direction	5.6/NW	4.9/SE	7.4/SE	4.5/SE	5.2/SE	6.8/se	6.3/w	7.7/sse	4.6/w	4.6/wnw	6.3nnw	7.7/nnw
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	8.4	4.1	7.9	6.6	3.4	4.7	4.8	3.3	4.3	8.4	7.3	5.9
Remark : "-" indicate missing data	Argometeorological analysis sub-division , Agrometeorology division data
	processing sub-division , Climatology division meteorological department