Climate at Pugu

The German colonial government still had the opportunity to move their residence for half of the year from Dar es Salaam to Lushoto, during the months the humidity and heat at the coast become unbearable. The graph below shows the annual cycle of hot and often humid months directly along the coast and during the short rains.

Pugu Hills experiences lower humidity and the short trip from town to pugu already changes your mood as soon as you start climbing the hills and the air cools down and the humidity starts dropping.

During a few months blankets can be required in Pugu at the time the aircos are still blasting in Masaki. What also influences the humidity in Pugu and clearly has its impact on the Pugu Forest is the dramatic drop of annual precipitation. Since the millennium the rains become less, although a slight improvement was noticed the last two years. Not only the recovery of the Forest (in case the human activities can be controlled) will become difficult in the absence of adequate rains, also bush fires which occured in the forest for the first time in 2009 close to the nature centre, become an additional threat.

While Kisarawe (Pugu Forest) used to have the highest annual precipitation in Dar es Salaam during the previous century, with values in the range of 1,400 mm per annum, the status of wettest area around Dar es Salaam has been lost with the ongoing climate change. An estimated 889 mm annual precipitation is provided for the period 1981 - 2009. Which figure dropped to 815 mm for the period 2000 - 2009. The effect of the climate change on the mean temperatures is clearly illustrated by the second graph which reflects the increased mean monthly temperature of 0.2 °C during the period 1990 - 1999 as compared to 1901 - 1989. And the further rise in 2000 - 2009 of 0.2 °C. The average mean monthly temperature values for Kisarawe are respectively 26.1 °C (1901 - 1989), 26.3 °C (1990 - 1999) and 26.5 °C (2000 - 2009).

Kisarawe precipitation and temperature 1981 - 2009
graph based on data interpretation Pugu Hills Nature Centre.