St. George's has a humid tropical monsoon climate. The average temperature is about . There are two seasons: the 'dry' season is from January to April, with only March truly qualifying as a dry season month, and the 'rainy' season lasts for the rest of the year. The wettest period is from July to November. There are short spells of rain in the dry period but they last no more than 5 minutes or so. Gray clouds over the mountains are the first sign of rain. The island in general often seems hotter than it is due to the humid climate and powerful equatorial UV rays.