National Environment Agency

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Weather Statistics

Weather records from a climate station are compiled over long periods for the purpose of determining climatic trends. For this purpose, NEA uses the Changi climate station as a reference point.

Rainfall
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Period of Record
Mean Monthly Total (mm)	243.3	159.4	186.6	179.5	172.2	161.3	158.5	175.4	168.7	193.3	256.4	287.9	1869-2012 (144yrs)
Highest Monthly Total (mm)	818.6 1893	566.7 1910	528.3 1913	454.9 1900	386.6 1892	378.7 1954	527.3 1890	526.8 1878	440.4 1988	497.1 1942	521.5 1874	765.9 2006
Lowest Monthly Total (mm)	15.4 1997	6.3 2010	18.5 1912	16.6 1977	41.6 1997	21.8 2009	18.6 1997	18 1888	23.7 1994	10.8 2002	53.5 1981	62.5 1932
Highest 1 day Total (mm)	216.2 30 2011	159.3 04 1995	122.8 08 2004	102.4 27 2007	153.7 04 1990	121.1 05 1984	149.1 27 1941	133.9 7 2008	187.3 21 1988	91.4 08 1952	198.6 02 1995	512.4 02 1978
Mean Raindays	15	11	14	15	15	13	13	14	14	16	19	19	1891-2012 (122yrs)
Maximum Raindays	26 1927	24 1964	23 1945	23 1970	23 1991	26 1899	20 several	23 1936	22 1986	23 several	24 several	26 several
Minimum Raindays	3 1976	1 1983	3 1983	3 1963	6 1997	4 1981	6 several	5 1941 1961	3 1997	5 1991	11 1998	8 1920

TEMPERATURE (°C)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Period of Record
Mean Daily Maximum	30.1	31.2	31.6	31.7	31.6	31.3	30.9	30.9	30.9	31.1	30.6	30.0	1929 - 1941 1948 - 2012 (78yrs)
Mean Daily Minimum	23.3	23.6	23.9	24.4	24.8	24.8	24.6	24.5	24.2	24.1	23.7	23.5
24-hr Mean	25.9	26.5	26.9	27.4	27.7	27.7	27.4	27.3	27.2	27.0	26.5	26.0
Highest Temperature	34.3 31 1979	35.2 26 2010	36.0 26 1998	35.8 19 1983	35.4 01 2005	35.0 25 1985	34.0 17 1991 17 1997	34.2 17 1986	34.3 15 2000	34.6 29 2002	34.2 26 2000	33.8 02 1948	1929 - 1941 1948 - 2012 (78yrs)
Lowest Temperature	19.4 30,31 1934	19.7 23 1951	20.2 12 1933 14 2000	20.7 16 1979	21.2 04 1989	20.8 19 1952	19.7 06 1976	20.2 30 1929	20.7 20 1933	20.6 10 1952	21.1 sev sev	20.6 02 1964	1929 - 1941 1948 - 2012 (78yrs)

RELATIVE HUMIDITY (%)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Period of Record
Mean Daily Maximum	95.9	95.7	96.4	96.9	96.4	95.5	95.0	95.1	95.9	96.5	97.1	96.8	1929 - 1941 1948 - 2012 (78 yrs)
Mean Daily Minimum	65.6	61.3	62.1	63.4	64.7	64.3	64.9	64.6	63.9	63.2	66.1	68.3
24-hr Mean	84.8	82.9	83.9	84.8	84.4	83.0	82.8	83.0	83.4	84.1	86.4	86.9
Lowest Minimum	35.0 29 1971	38.0 28 1990	39.0 06 1990 30 1990	33.0 01 1966	34.0 24 1955	36.0 20 2003	44.0 17 1991	39.0 21 1965	35.0 22 1930	40.0 Several Several	37.0 18 1934	34.0 01 1950	1929 - 1941 1948 - 2012 (78 yrs)

THUNDERSTORM, LIGHTNING
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Period of Record
Mean Thunderstorm Days	5	6	13	19	19	15	13	14	15	18	19	12	1982 - 2012 (31 yrs)
Maximum Thunderstorm Days	13 2001	14 2000	23 2000	26 several	24 2001	21 1999	23 2004	20 1996	20 1986 1996	24 1993	26 1982	22 2000
Minimum Thunderstorm Days	0 several	0 1983,1990	3 1990	10 1990	10 2003	9 1982	4 1994	5 1988	4 1994	7 2006	14 1991	4 1986
Mean Lightning Days	6	5	15	22	22	17	14	13	13	20	24	16
Maximum Lightning Days	14 2000	14 1988	24 1985	28 1982 2003	29 1983	24 1988	25 1985	23 1996	24 1984	28 2001	29 Several	27 2002
Minimum Lightning Days	0 1986	1 1996 2007	2 1983	9 1983	13 2003	10 2004	1 1994	2 1997	0 1994 1997	2 2006	14 2004	6 1983

Last updated on 03 May 2013

Climate Data

Daily values of Meteorological elements in 2012

Daily Rainfall, Maximum, Minimum and Mean Temperature in 2012

Monthly Rainfall Isohyets 2012

Apr	MAY	Jun
	10
2012	2013	2014