The weather in December and January is almost identical. It is hot, moist and rainy. The thermometer shows +28–29 °C during the day. It drops down to +23 °C at night. The sea is +26-27 °C.
December is the rainiest month of the year. It can rain almost every day, often with thunderstorms. Expect warm, short showering in the afternoon or early in the evening. The level of humidity in December is quite high and can reach up to 97% (up to 68% at night). It rains less often in January.
February is a bit less hot. The temperature makes +31 °C on average. Expect +24 °C after sunset. The sea is +27 °C. It rains less often and the level of humidity decreases during this month.
The weather is really hot in May. The thermometer shows +31–32 °C during the day. Expect +23-24 °C after sunset. The sea water makes up to +29 °C. There is a moderate level of precipitation. It rains quite often in the afternoon or in the evening.
April and May are the hottest months of the year. The high is +32–34 °C (+26-27 °C at night). The temperature of water is up to +31 °C. Humidity reaches at least 84% and it makes the weather stuffy and hot.
Frequent raining with thunderstorms helps but the showers are usually short. Still, they bring pleasant chill for a short period of time.
The summer season in Singapore is hot and moist. The thermometer in June shows +32–33 °C. Expect up to +27 °C at night. The sea water makes +29-31 °C and resembles hot milk.
July and August are a bit less hot. The high makes +30–32 °C during the day (+25 °C at night). Humidity is very high and reaches up to 82%.
South-western monsoons bring short showers (that last less than 30 minutes) and thunderstorms to the region. These are very frequent at midday. Sumatra squalls are very common during the summer season as well. These strong winds usually form over the Strait of Malacca early in the morning.
The weather in September and October is hot and moist. In fact, climatic conditions in the region are quite stable due to the city's location. It is situated near to the equator. The thermometer shows up to +30–33 °C during the day. Expect +24-26 °C at night. The sea is up to +29 °C.
September is less rainy if compared to August. However, it rains more in October. It can shower almost every day, often with thunderstorms. Expect heavy precipitation in November. It is the rainiest and dullest month of the year. Humidity can make up to 97% (around 66% at night).