St. Petersburg averages 70.3 days a year above 90°F, with August the wettest month at 8.39 in of normal rain. The hottest day on record was 98°F on Aug 16, 2005; the coldest, 32°F on Jan 24, 2003. The single biggest 24-hour rain event recorded was 6.93 in on Sep 14, 2001.
Climate and Average Weather Year Round in St. Petersburg
Year-round temperature
In St. Petersburg, the warmest months are June through September, with average daily highs between 88°F and 90°F. The coldest stretch runs December through February, with highs between 69°F and 72°F and overnight lows reaching 55°F.
Rainfall through the year
Rainfall in St. Petersburg averages 3.9 in per month over the long run. August is the wettest at 8.4 in, while November is the driest at 1.5 in.
Days at 90 °F or hotter
St. Petersburg averages 70.3 days per year at 90 °F or hotter. The hottest year on record saw 128 such days (2024); the coolest just 21 (2026).
Precipitation this year
As of May 28, St. Petersburg has received 7.6 in of precipitation this year — 31% below the long-term normal for this point in the year (11.1 in).