AGROCLIMATOGICAL DATA 2021
Station     : Ratchaburi			Elevation of station above MSL								6.00  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	34.5	38.2	38.0	37.3	37.9	37.4	37.1	36.0	34.5	35.1	33.9	33.2	38.2
Date	25	26	31	23	4	4	3	22	30	1	22	24	26-Feb
Mean Maximum	31.0	34.1	36.0	35.1	35.7	34.5	33.2	33.7	32.4	32.1	31.0	30.5	33.3
Mean	25.0	27.4	30.0	29.9	30.6	30.0	28.8	28.6	27.5	28.5	26.7	24.9	28.2
Mean Minimum	18.9	20.6	23.9	24.7	25.5	25.5	25.0	25.2	24.9	24.8	24.2	20.6	23.7
Extreme Minimum	14.1	17.2	21.6	21.6	23.0	23.7	23.7	24.0	23.5	22.6	21.7	16.9	14.1
Date	13	22	7	23	6	19	14	17	26	18	28	5	13-Jan
Grass minimumtemperature (celcuis)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean	16.3	18.3	22.1	23.6	24.1	23.9	23.9	23.7	23.9	23.8	22.6	17.8	22.0
Extreme Minimum	10.7	15.6	18.9	20.8	22.1	21.4	21.9	22.4	22.4	22.5	18.1	13.0	10.7
Date	14	22	7	23	6	19	3	19	17	18	28	5	14-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	96.0	96.0	96.0	96.0	97.0	95.0	95.0	94.0	94.0	94.0	94.0	93.0	95.0
Mean	70.0	71.0	74.0	80.0	78.0	76.0	82.0	82.0	85.0	85.0	83.0	72.0	78.0
Mean Minimum	41.0	35.0	43.0	50.0	55.0	52.0	58.0	67.0	65.0	67.0	66.0	48.0	54.0
Extreme Minimum	-	-	-	-	-	-	-	-	-	-	-	-	-
Date	-	-	-	-	-	-	-	-	-	-	-	-	-
Soil temperature (celcuis)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean at surface	26.7	28.9	31.8	31.0	31.5	30.4	29.6	30.0	29.4	29.5	28.3	26.3	29.5
Mean at 5 cm	26.8	29.0	31.8	31.3	31.8	30.7	29.9	30.3	29.7	29.6	28.7	26.8	29.7
Mean at 10 cm	27.5	29.4	32.4	31.7	32.2	31.1	30.3	30.6	30.0	30.0	29.1	27.4	30.1
Mean at 20 cm	27.5	29.5	32.4	32.0	32.4	31.4	30.5	30.8	30.2	30.1	29.1	27.5	30.3
Mean at 50 cm	28.3	30.0	322.6	32.8	32.9	32.3	31.5	31.6	30.9	30.8	30.1	28.4	31.0
Mean at 100 cm	28.6	29.5	31.2	31.9	32.1	31.8	31.2	31.0	30.7	30.4	29.9	28.7	30.6
Rainfall ( mm )	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total amount	-	12.1	19.9	158.0	124.6	77.0	165.3	152.6	191.0	257.9	104.2	6.7	1,269.3
Number of rainy day	-	1	2	9	9	12	24	17	22	15	12	1.0	124
Greatest in 24 hr	-	-	-	-	-	-	-	-	-	-	-	-	-
Date	-	-	-	-	-	-	-	-	-	-	-	-	-
Evaporation	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean	134.57	124.90	164.88	137.33	137.33	179.10	159.63	120.70	134.07	96.74	82.08	123.50	132.90
Wind	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Prevailing direction	1.23/N	0.95/SE	0.97/SE	0.82/SE	0.93/SE	1.00/W	0.77/W	0.78/SSE	0.71/W	0.79/N	0.97/NW	1.15/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	8.6	8.7	7.7	6.0	7.7	6.4	4.4	5.3	3.5	5.2	4.8	7.4	6.3
Remark : "-" indicate missing data	Argometeorological analysis sub-division , Agrometeorology division data
	processing sub-division , Climatology division meteorological department