Brunei is a very small, humid equatorial country on northern Borneo, so its climate is broadly uniform across the country. It has a tropical rainforest climate under Köppen classification, with hot temperatures year-round, very high humidity, and abundant rainfall. Recent national climate reporting shows an annual mean temperature of 28.5 C in 2023, about 0.5 C above the long-term average, and rainfall remains frequent throughout the year. For residents and expats, the main realities are persistent warmth, heavy rain in the northeast monsoon season, and limited seasonal variation rather than true summer and winter contrasts.