Weather is probably a major factor when you plan your trip to Tulcan, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually October and September, with an average temperature of 12°C, while the coldest months are August and July, with an average of 11°C. The rainiest months in Tulcan are November, April, December and March, with each month seeing an average of 358 mm of rainfall.