Colors of the following climate diagrams: Malaysia Indonesia
Daily maximum temperatures
The highest daytime temperatures in Indonesia are reached in October with an average of 32.2 °C. The coldest month, on the other hand, is July, with an average of just 31.1 °C. In Malaysia, April is the warmest month, with 32.8 °C. There, it is coolest in December with an average of 31.2 °C.
Night time lows
At night, it cools down to varying degrees depending on the country and altitude. In Indonesia, temperatures drop as low as 23.5 °C in July. The warmest nights are in May at 24.4 °C. In Malaysia, it is coolest at night in January at 24.1 °C and warmest in May at 25.0 °C. This corresponds to a cooling of 7.1 to 8.2 °C in Indonesia and 7.0 to 8.1 °C in Malaysia.
The humidity of the air depends to a large extent on the air temperature. The warmer the air, the more water it can absorb. At a temperature of 25°C it is 23 grams per cubic meter, at 30 degrees it is already 26 grams. Therefore, the air humidity is given as a relative value to the temperature-dependent maximum amount. It becomes unpleasant when high humidity is combined with high temperatures.
Humidex is an approximate, sensed temperature calculated on the basis of air temperature, dew point and humidity. It was developed in 1965 by the Canadian meteorologists J. M. Masterton and F. A. Richardson. Since the wind speed is ignored here, it is not very meaningful in areas below approx. 15°C. Above that, it is more reliable, since at higher temperatures humidity plays a greater role than wind.
Rain days per month
By definition, a rain day is a day on which at least 0.1 liters of precipitation per m² fall. This corresponds to a 1 square meter puddle in which the water stands 0.1 mm high — insofar as the water does not seep away or evaporate. So it does not have to rain all day long. December brings the most rainy days (16.5) in Indonesia. With an average of only 9.7 days, September is the friendliest. In Malaysia, it rains most often in November with 18.5 days.
Precipitation amount per day
Depending on the season and the location of a country, the wind brings a varying amount of water with it. As a rule, the water evaporating in the oceans is absorbed and then transported inland. The greatest amount of rain (hail or dew are also forms of precipitation) in Indonesia occurs in December, when about 9.4 liters per square meter fall per day. In Malaysia, the average amount of precipitation ranges from 4.8 liters per day in February to 11.0 in November. However, these are average values. If you consider that there are only 18.5 rainy days in Malaysia in November, each of them accounts for about 17.8 liters.
Sunshine hours per day
With 2,336 hours of sunshine per year, Malaysia is in the lead. The most hours of sunshine (7.2 per day) are in February. Indonesia falls into second place with only 2,008 hours. There the sun is visible in December for only 4.4 hours per day, so not hidden behind clouds.
Hours of daylight
The length of a day varies throughout the year and depends on the distance from the equator. In June, the day in Indonesia is only 12.0 hours long. In January, on the other hand, it is 12.3 hours. In Malaysia, it is 11.9 hours in January and 12.4 in June.