2017 Could be Klang Valley’s Wettest in Recent Years

2016 was Earth’s hottest year on record. As far as anyone in Klang Valley could remember, 2016 was a hot and hazy year.  In fact, last year’s March, we were just 0.1°C short of the highest temperature ever recorded in Malaysia. Water rationing woe was also a hot topic, as the dams reported unusually low water level.

This year, in contrast, anyone who has spent enough time in Klang Valley would definitely agree that we are experiencing unusually high rainfall, even during months that were supposedly drier.

But, is 2017 a factually wetter year so far? I dug up some historical weather data of KUL (airport code for KL International Airport) from Weather Underground, to compare the rainfall trend of 1st Jan-30th Apr, for year 2014 to 2017. The rainy day Some data and charts are summarised into a few slides.

What can we tell from historical weather data?

  1. Out of 120 days from 1st Jan 2017 to 30th Apr, there were only 18 days without rain/thunderstorm event! Thus, we have witnessed 85% chance of rainy day. In contrast, average rainy days for the same period from 2014-2016, is 61.76%.
  2. In past years, February (Chinese New Year month) was usually a drier month. But this year, we have witnessed 78.57% rainy days in February, compared to 28.57% in Feb 2014. That’s a huge difference of 50% gap!
  3. Rain was recorded everyday for almost the entire month of Apr 2017, except 10th Apr.


From personal perspective, the wetter days in 2017 are bringing to me the following comforting benefits:

  1. I don’t have to water my outdoor plants twice-daily this year. In fact, I have been doing much less plant watering chore this year.
  2. No haze! Last year’s Apr, it was bad. There were a couple of “hazy seasons” last year.
  3. Cooler morning and night.

But at the same time, some downsides too:

  1. More traffic congestions during rainy hours.
  2. Not an agricultural expert; I am not sure if the increased rainfall has affected the flowering of durian trees and its supply. This year’s durian is, very pricey!
  3. Rain is definitely affecting a tourist’s itinerary and plans.


Nothing is ever perfect. It is what we make of it.


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