St. Petersburg, FL Climate & Monthly Averages
The climate of St. Petersburg
Weather in St. Petersburg is shaped by its humid subtropical climate - expect hot, humid summers and generally mild winters. July afternoons typically reach 88°F (31°C), while January highs hover near 68°F (20°C). Annual precipitation averages 49.5 inches (1258 mm) over about 150 rainy days.
Climate quick facts
- Hottest month: July - highs near 88°F (31°C)
- Coldest month: January - highs near 68°F (20°C)
- Record high: 98°F (36°C) · Record low: 31°F (-1°C) (2015–2024)
- Wettest month: August (25 rainy days) · Sunniest: May (12.0 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 88°F (31°C) and overnight lows stay near 78°F (26°C). The coolest month is January, with typical highs of 68°F (20°C) and lows around 55°F (13°C). Based on 2015–2024 weather data, temperatures have reached as high as 98°F (36°C) and dropped as low as 31°F (-1°C).
Rain, sun and snow
August is usually the wettest month. It brings about 8.5 inches (216 mm) of rain over 25 days, while March is the driest. May brings the most sunshine, averaging 12.0 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 68° | 55° | 8 | 2.9 in | 8.5 h/day | 75% |
| February | 72° | 59° | 6 | 2.0 in | 9.6 h/day | 78% |
| March | 76° | 63° | 6 | 1.8 in | 10.4 h/day | 73% |
| April | 80° | 67° | 8 | 2.6 in | 11.5 h/day | 71% |
| May | 85° | 72° | 10 | 3.2 in | 12.0 h/day | 70% |
| June | 87° | 76° | 21 | 6.5 in | 11.2 h/day | 78% |
| July | 88° | 78° | 25 | 6.8 in | 10.9 h/day | 78% |
| August | 87° | 78° | 25 | 8.5 in | 10.4 h/day | 79% |
| September | 86° | 76° | 20 | 6.8 in | 10.0 h/day | 79% |
| October | 83° | 71° | 9 | 3.5 in | 9.9 h/day | 74% |
| November | 77° | 65° | 6 | 2.0 in | 9.1 h/day | 74% |
| December | 72° | 60° | 6 | 3.0 in | 8.5 h/day | 78% |
St. Petersburg month by month
St. Petersburg weather in January
January brings highs around 68°F (20°C), lows near 55°F (13°C), about 8 wet days - typically the coldest month of the year in St. Petersburg.
St. Petersburg weather in February
February brings highs around 72°F (22°C), lows near 59°F (15°C), about 6 wet days.
St. Petersburg weather in March
March brings highs around 76°F (24°C), lows near 63°F (17°C), about 6 wet days - typically the driest month of the year in St. Petersburg.
St. Petersburg weather in April
April brings highs around 80°F (27°C), lows near 67°F (20°C), about 8 wet days.
St. Petersburg weather in May
May brings highs around 85°F (29°C), lows near 72°F (22°C), about 10 wet days - typically the sunniest month of the year in St. Petersburg.
St. Petersburg weather in June
June brings highs around 87°F (30°C), lows near 76°F (25°C), about 21 wet days.
St. Petersburg weather in July
July brings highs around 88°F (31°C), lows near 78°F (26°C), about 25 wet days - typically the hottest month of the year in St. Petersburg.
St. Petersburg weather in August
August brings highs around 87°F (31°C), lows near 78°F (26°C), about 25 wet days - typically the wettest month of the year in St. Petersburg.
St. Petersburg weather in September
September brings highs around 86°F (30°C), lows near 76°F (25°C), about 20 wet days.
St. Petersburg weather in October
October brings highs around 83°F (28°C), lows near 71°F (22°C), about 9 wet days.
St. Petersburg weather in November
November brings highs around 77°F (25°C), lows near 65°F (18°C), about 6 wet days.
St. Petersburg weather in December
December brings highs around 72°F (22°C), lows near 60°F (16°C), about 6 wet days.
Seasons in St. Petersburg
Spring (March through May)
Spring in St. Petersburg is pleasantly warm, with daytime highs averaging 80°F (27°C) and nights around 67°F (20°C); expect showers on roughly 25 days across the season.
Summer (June through August)
Summer in St. Petersburg brings hot afternoons, with daytime highs averaging 87°F (31°C) and nights around 78°F (25°C); expect showers on roughly 71 days across the season. With the humidity factored in, afternoons often feel hotter than the thermometer reads - run the numbers through the humidity and dew point converter to see why.
Fall (September through November)
Fall in St. Petersburg is hot, with daytime highs averaging 82°F (28°C) and nights around 71°F (22°C); expect showers on roughly 35 days across the season.
Winter (December through February)
Winter in St. Petersburg brings comfortable warmth, with daytime highs averaging 71°F (21°C) and nights around 58°F (14°C); expect showers on roughly 20 days across the season.
Climate questions, answered
What is the average temperature in St. Petersburg?
Is St. Petersburg hot in summer?
Is St. Petersburg cold in winter?
How many rainy days does St. Petersburg get in a year?
Best time to visit St. Petersburg
The best time to visit St. Petersburg is generally November to April, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 74°F (23°C).
Pack for St. Petersburg with lightweight, breathable clothing and strong sun protection for the hot months; a compact umbrella or rain shell - showers are a regular feature; moisture-wicking fabrics to cope with the humidity. Evenings can feel noticeably cooler than afternoons - July nights average 78°F (26°C).
St. Petersburg temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.