Other facts from our historical weather data: When is the rainy season in Lampang? Rainy season in Lampang occurs in the months of May, June, July, August and September. Does Lampang have a dry season? Yes, the months of January, February and December are very dry. Which is the hottest month in Lampang? April has an average maximum temperature of 38°C (100°F) and is the hottest month of the year. Which is the coolest month in Lampang? The coolest month is January with an average maximum temperature of 31°C (88°F). Which is the wettest month in Lampang? August tops the wettest month list with 284mm (11.2 in) of rainfall. Which is the driest month in Lampang? February is the driest month with 7mm (0.3 in) of precipitation. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.