Other facts from our historical weather data: Which months have the greatest rainfall in Seathwaite? Most rainfall (rainy season) is seen in January, October, November and December. Which is the warmest month in Seathwaite? July has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Seathwaite? The coldest month is February with an average maximum temperature of 8°C (46°F). Which is the wettest month in Seathwaite? December tops the wettest month list with 173mm (6.8 in) of rainfall. Which is the driest month in Seathwaite? April is the driest month with 91mm (3.6 in) of precipitation. Which is the sunniest month in Seathwaite? May is the sunniest month with an average of 217 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.