Planning for the weather is a good way to make your trip to San Antero relaxing and enjoyable, especially when you're splurging. The hottest months are usually February and March, with an average temperature of 28°C, while the coldest months are November and December, with an average of 27°C. The rainiest months in San Antero are August, May, July and June, with each month seeing an average of 278 mm of rainfall.