Southwest monsoon, eh? I find it hard to believe the cloud ceiling is at 9000 ft and have steady light rain. Maybe if the overall wind flow is from the east where the mountains shear off the lower clouds. I'd bet the ceiling is at 2,300 ft. Maybe the observer is depending solely on what instruments say which can be misleading.

The ceiling is important for aircraft taking off and landing.

Data at: 1126 UTC 13 Aug 2016
RPLL 131100Z VRB01KT 8000 -RA SCT023 OVC090 24/24 Q1006 NOSIG RMK A2971

TAF RPLL 131100Z 1312/1418 24008KT 8000 -RA SCT022 OVC080 TX28/1406Z TN23/1321Z
TEMPO 1312/1318 23008KT 6000 RA SCT020 OVC080
TEMPO 1318/1324 21010KT 4000 +RA SCT020 OVC070