Singapore has a tropical rainforest climate with no distinctive seasons, uniform temperature and pressure, high humidity, and abundant rainfall. Temperatures usually range from 22 to 35 °C. Relative humidity averages around 79% in the morning and 73% in the afternoon. April and May are the hottest months, with the wetter monsoon season from November to January. From July to October, there is often haze caused by bush fires in neighbouring Indonesia.