The best moment to go to Amphawa is in November, December, January and February. The least favorable months, due to the monsoon, are from June to September until mid-October. September is the month when it rains the most, there can be some flash floods in some parts of the city.
We are one week away from Chinese New Year (January 25th, 2020) and despite a lot of mail and detailed information requests from various Tourist Offices in several cities, I unfortunately did not get all the details that I would have liked...