 There are two monsoon seasons in the Bintulu : the northeast moonsoon ( November to March ) and the southwest moonsoon ( May to September ) . The calm period between these two moonsoons is known as the transitional period . In the coastal region , maximum rainfall occurs in the month of January , while minimal rainfall occurs from the period June to August . Rainfall is more evenly distributed in the inland areas . The annual rainfall of the Bintulu region is about 3 @,@ 750 mm ( 148 in ) annually . The mean daily hours of sunshine at Bintulu is about 5 @.@ 0 to 5 @.@ 5 hours . Bintulu receives on average 14 to 15 mJ / m2 of radiation throughout the year . Bintulu 's relative humidity is 85 % . 
 <a href='dey_it' title='1'><mark>There</mark></a> are two monsoon seasons in the Bintulu : the northeast moonsoon ( November to March ) and the southwest moonsoon ( May to September ) . The calm period between these two moonsoons is known as the transitional period . In the coastal region , maximum rainfall <a href='uninflect' title='2'><mark>occurs</mark></a> in the month of January , while minimal rainfall <a href='uninflect' title='3'><mark>occurs</mark></a> from the period June to August . Rainfall is more evenly distributed in the inland areas . The annual rainfall of the Bintulu region <a href='drop_aux' title='4'><mark>is</mark></a>about 3 @,@ 750 mm ( 148 in ) annually . The mean daily hours of sunshine at Bintulu <a href='drop_aux' title='5'><mark>is</mark></a>about 5 @.@ 0 to 5 @.@ 5 hours . Bintulu <a href='uninflect' title='6'><mark>receives</mark></a> on average 14 to 15 mJ / m2 of radiation throughout the year . Bintulu <a href='null_genetive' title='7'><mark>'s</mark></a>relative humidity <a href='drop_aux' title='8'><mark>is</mark></a>85 % . 
It is two monsoon seasons in the Bintulu : da northeast moonsoon ( November to March ) and tdasouthwest moonsoon ( May to September ) . The calm period between these two moonsoons is known as the transitional period . In thdaoastal region , maximum rainfall occur in the month of January , while minimal rainfall occur from thedariod June to August . Rainfall is more evenly distributed in the inland areas . The annual rainfall of the Bintulu region about 3 @,@ 750 mm ( 148 in ) annually . The dan daily hours of sunshine at Bintulu bout 5 @.@ 0 to 5 @.@ 5 hrs . Bintulu receive on average 14 to 15 mJ / m2 of radiation throughout the year . Bintulu  relative humidity 85 % .