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In terms of precipitation, rainfall in Alor Setar ranges from 2.0 - 12.6 inches per month. September is typically the wettest month, when rainfall can reach 12.6 in. February is typically the driest time to visit Alor Setar when rainfall is around 2.0 in.
If weather is an important factor for your trip to Alor Setar, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).