Singapore lies
just north of the Equator near Lat 1.5 deg N and Long 104 deg
E. Because of its geographical location and maritime exposure,
its climate is characterised by uniform temperature and pressure,
high humidity and abundant rainfall.
The climate
of Singapore can be divided into two main seasons, the Northeast
Monsoon and the Southwest Monsoon season, separated
by two relatively short inter-monsoon periods.
SEASONS:
North-East
Monsoon Season - December to March
Northeast winds prevail, sometimes
reaching 20 km/h. Cloudy conditions in December and January with
frequent afternoon showers. Spells of widespread moderate to
heavy rain occur lasting from 1 to 3 days at a stretch. Relatively
drier in February till early March. Also generally windy with
wind speeds sometimes reaching 30 to 40 km/h in the months of
January and February.
Pre South-West Monsoon - April to May
Light and
variable winds with afternoon and early evening showers often
with thunder.
South-West
Monsoon Season - June to September
Southeast/Southwest
Winds. Isolated to scattered late morning and early afternoon
showers. Early morning "Sumatra" line squalls are common.
Hazy periods.
Pre North-East Monsoon - October
to November
Light and
variable winds. Sea breezes in afternoon. Scattered showers with
thunder in the late afternoon and early evening.
TEMPERATURE:
Diurnal range:
Minimum 23 to 26 deg C and Maximum 31 to 34 deg C
Extremes: Minimum of 19.4 deg C and Maximum of 35.8 deg C
PRESSURE:
Diurnal pressure
variation of 4hPa. Maximum pressure usually occurring at 1100
and 2400 Local Time and minimum pressure occurring at 0500 and
1700 Local Time. Extreme pressures recorded are 1016.9 hPa and
1002.0 hPa.
RELATIVE HUMIDITY:
Diurnal range
in the high 90's in the early morning to around 60 % in the mid-afternoon.
Mean value is 84%, During prolonged heavy rain, relative humidity
often reaches 100 %.
RAINFALL:
No distinct
wet or dry season. Rainfall maximum occur in December and April.
The drier months are usually in February and July.
SEASONS:
North-East
Monsoon Season - December to March
TEMPERATURE:
RELATIVE HUMIDITY:
RAINFALL:
