devonport has an warm-summer mediterranean climate (köppen climate classification csb) , bordering on an oceanic climate (köppen climate classification cfb), with mild to warm summers, cool and moist winters and high humidity (about 70%) all year round. most days from january to march are pleasantly warm, averaging with frequent sunshine. the warmest and driest days can occasionally reach up to . unlike the south and east coasts of tasmania, humid northerly winds prevent heatwaves and temperatures rarely if ever reach above . winters are cool and cloudy with frequent light rain; july and august are the wettest months of the year. due to almost constant cloud cover and coastal influence, winter temperatures rarely drop below or rise above . september to december usually features mild and windy weather with frequent showers, and occasional warm, sunny breaks.