Pinellas County, Florida - Climate

Climate

Pinellas, like the rest of the Tampa Bay area, has a humid subtropical climate, resulting in warm, humid summers with frequent thunderstorms, and drier winters. Pinellas County's geographic position- lying on a peninsula between Tampa Bay and the Gulf of Mexico introduces large amounts of humidity into the atmosphere and serves to moderate temperatures. The geography of the peninsula also causes some variance in the county's average temperatures. St. Petersburg, further south on the peninsula, tends to have warmer daily average lows (by about 3 degrees) than areas such as Dunedin and Palm Harbor further north, though daily highs are very close. The north of the county also has fewer overall days of rain, but higher total annual precipitation when measured in inches, the county's south being prone to shorter, more frequent thunderstorms especially in the late summer.

Freezing temperatures occur only every 2–3 years, with freezing precipitation occurring extremely rarely. Springs are usually short, mild, and dry, with occasional late-season cold fronts. Summertime weather is very consistent, with highs in the low 90s °F (around 32 °C), lows in the mid-70s °F (around 24 °C), accompanied by high humidity and an almost daily chance of afternoon thundershowers. The area experiences significant rainfall during its summer months (approximately May through October), with nearly two-thirds of annual precipitation falling between the months of June and September. The area is occasionally affected by tropical storms and hurricanes, but has not suffered a direct hit since 1921. Fall, like spring, is usually mild and dry, with the hurricane season extending through November and sometimes affecting the area.

Many portions of St. Petersburg, especially along the bay and in south St. Petersburg, have tropical microclimates. Tropical trees such as royal palms and coconut palms and fruit trees like mangoes will grow in these microclimates.