Singapore TemperatureSignapore Temperature
Weather in Singapore Average annual weather
Singapore's warmest months are February with an mean temperature of 27°C (81°F) and the coolest is January with 26°C (79°F) with the highest number of sunny days in September. December is the wetest months with an annual rainfall of 269mm. For the best swimming season, April is when the mean ocean temperature is 86°F (30°C).
Temperature range High/low temperature average: Averages of precipitation: Sunshine on an daily average: Sea temperature average:
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Ongoing Observations | Temperature | Temperature |
This information (except visibility) is gathered by automatic meteorological tools and released as soon as it is created. Cases may arise in which there are loopholes in the database due to technological issues. If necessary, the information is corrected afterwards. Although every endeavour has been made to place the instrument in relatively undisturbed areas to best display the general meteorological condition, there are periods when this is not possible.
This means that the measurement of the devices can be affected by on-site circumstances, e.g. measurement at some coastal sites can be strongly affected by the ambient ocean.
Singapore's climate |
Near the Ecuadorian Sea, Singapore has a typical tropic weather with heavy precipitation, high and even temperature and high air moisture all year round. Much of its climatic variable, such as temperature and RH, do not show large monthly fluctuations. Singapore's temperate climates are characterized by two monsoons, divided by intermonsoonal period (see chart below).
Northeastern monsoon takes place from December to early March, southwestern monsoon from June to September. Singapore's most important meteorological system, which can cause severe rains, are: Monsoons or severe winds in the northeast monsoon current leading to large rains; Sumatran gusts, an organized series of storms that have evolved over the Sumatran Isle or the Strait of Malacca to our western side; afternoons and evenings storms due to severe warming and the ocean breezes that develop in the afternoons.
Monsoons in the first half of the year, usually from December to early January, cause extensive, prolonged mild to severe rainfall with wind speeds of 25-35 km/h. Seasons, usually from the end of January to early March. and in the early evenings. Singapore has plenty of precipitation and an annual rainfall of 167 rainy nights1.
Longgterm mean precipitation from 1981-2010 is 2165.9 mm. Figure 1 - Mean number of rainy holidays per months (1981-2010). Figure 3 - Change in precipitation per hour for each of the months (1981-2010). Whilst there is no pronounced rainy or arid period in Singapore, there are fluctuations in precipitation on a regular basis. More precipitation from November to January during the rainy period of the Northeast Monsoon (Fig. 1 - 3), when the large tropic rainy belt (the Intertropic Convergence Zone ITCZ) is in our vicinity.
February is the dryest months during the arid period of the Northeast Monsoon, when the rainy zone has gone further southwards to influence Java. Precipitation in Singapore shows a strong fluctuation during the day (Fig. 3), with precipitation more frequent during the day, especially in the afternoon when the sun's heat is high.
With regard to the geographical spread, precipitation is higher over the north and west parts of Singapore and declines towards the east of the isle (? 4). In comparison to the moderate region, Singapore's temperature varies little from day to week and even from week to year. There is a minimal temperature that normally does not rise below 23-25ºC during the nights and a maximal that does not rise above 31-33ºC during the same time.
The highest averages are May and June (24-hour mean of 27.8ºC) and December and January are the coldest (24-hour mean of 26.0ºC). Singapore also has a coastline as an isle. After all, the thermal power of our waters is greater than that of the earth's surfaces, and more warmth is needed to raise ocean-temperature.
Significant windspeeds, precipitation and clouds are the most important factors in reducing the effects of the tropic heats. Percentage changes in air moisture are fairly even throughout the year and do not fluctuate very much from month to months (Fig. 7). Day-to-day fluctuations are more pronounced, ranging from more than 90% in the mornings just before dawn to around 60% in the afternoons on rainy evenings.
Singapore's strongest north-easterly and southern breeze reflects the predominance of the Singapore Monsun (see compass card in Fig. 8). As a rule, on a certain date the current of the moon prevails, except when slight currents are altered by ground or meteorological conditions (e.g. rain shower or thunderstorm, breeze from the shore or sea).
The prevailing north to northeast direction of the breeze is during the northeast moon (December to March) and south to southeast during the southwest moon (June to September). During the northeast moon the Beaufort is higher. MONSUNMONS ( "April, May, October and November") are transitional seasons between the monsunas. The breezes are light and changeable.
Figure 9 - Daily variations in sea windspeed (m/s) and directions for each of the months (average 1981-2010). Displays a summary of the changes in ground winds during the year, both once a week and once an hours. Every dart shows the mean of the last hour's winds (average hours wind). Arrows indicate the force of the breeze and the arrows indicate the heading from which the breeze is flowing.
Figure 10 - Mean montly sea air velocity (m/s). Throughout the year, the breezes show a daytime variability, with lower breezes at nights and higher breezes during the outdoors. During the north-east monsoon in January and February the highest breezes appear (Fig. 10). Winters in Singapore are generally bright, with mean sea windspeed usually less than 2. 5 metres per second except during the existence of a northeast monsoon fluctuation when mean velocities of 10m/s or more have been observed. However, in Singapore the prevailing weather conditions are very favourable.
Other periods of heavy breezes are storms. Gusting surfaces are caused by lightning storms and the passing of Sumatran gales. The view is generally good during the northeast monsoons from December to March, except in rain or shatter. During the south-west month and in mild weather during the monsoons, there is a mild to medium mist, which can decrease vision to less than 10km.
Bad visibilities can often be seen between 0500 and 0900 o'clock in mild to quiet winds in foggy weather. After a few hrs of rainy weather, bad visibilities can sometimes be seen, especially in almost tranquil winds. As Singapore is located near the Ecuadorian Sea, the length of the whole year is relatively stable and so is the solar radiation.
Most of the sunny periods are in February and March, while November and December have the slowest (Figs. 11 - 12). Figure 12 - Monthly variations of sunny hour. The most frequent low cloudy species in Singapore are cumulumulus, stratocumulus und accumulonimbuses. A northeastern monsoon wave produces scattered to cloudy mid-layer and large accumulus nebulae that cause extended rainfall and occasional strong rainfall.
Lower clouds of stress with a base below 1,000 feet (0.3 km) are often seen after Sumatran gusts and during the northeast monsoon.