Visiting local bars in San Jose Chiapa is better when you know what the weather holds. These rainfall averages and temperatures can help you determine the best time for bar hopping. The hottest months are usually April and May with an average temp of 64°F, while the coldest months are January and December with an average of 57°F. The rainiest months in San Jose Chiapa are September, June, August, and July, with each month seeing an average of 11 inches of rainfall.