This report describes the typical weather at the Paya Lebar Air Base (RSAF) (Singapore) weather station over the course of an average July. It is based on the historical records from 1999 to 2012. Earlier records are either unavailable or unreliable.
Singapore has a tropical rainforest climate with no dry season. The area within 25 mi of this station is covered by croplands (45%), oceans and seas (41%), built-up areas (6%), shrublands (3%), and grasslands (3%).
The month of July is characterized by essentially constant daily high temperatures, with daily highs around 88°F throughout the month, exceeding 91°F or dropping below 85°F only one day in ten.
Over the course of July, the length of the day is essentially constant.
The earliest sunrise is at 7:03am on July 1; the latest sunset is at 7:17pm on July 25; the latest sunrise is at 7:05am on July 25; the earliest sunset is at 7:14pm on July 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 90% (mostly cloudy) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 1% of the time, partly cloudy 8% of the time, and mostly cloudy or overcast 69% of the time.
The average probability that some form of precipitation will be observed in a given day is 67%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are thunderstorms and light rain.
Thunderstorms are the most severe precipitation observed during 79% of those days with precipitation. They are most likely around July 1, when it is observed during 57% of all days.
Light rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around July 22, when it is observed during 9% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 63% (mildly humid) to 92% (very humid) over the course of a typical July, rarely dropping below 55% (mildly humid) and reaching as high as 98% (very humid).
The air is driest around July 1, at which time the relative humidity drops below 68% (mildly humid) three days out of four; it is most humid around July 17, rising above 89% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical July, the dew point typically varies from 72°F (very muggy) to 78°F (oppressive) and is rarely below 70°F (muggy) or above 80°F (very oppressive).
Over the course of July typical wind speeds vary from 0 mph to 11 mph (calm to gentle breeze), rarely exceeding 14 mph (moderate breeze).
The highest average wind speed of 5 mph (light breeze) occurs around July 31, at which time the average daily maximum wind speed is 11 mph (gentle breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around July 1, at which time the average daily maximum wind speed is 11 mph (gentle breeze).