Climate and monthly weather forecastSaint Petersburg, FL
Climate and monthly weather forecast
The climate of Saint Petersburg
Saint Petersburg, located in the humid subtropical region, classifies under the Köppen climate classification as Cfa. No month is free from precipitation, with the year round climate encompassing hot, humid summers and mild winters. Taking a close look at the climatic patterns, a noteworthy amount of rainfall occurs from June to September, reaching its highest at 5.24" (133mm) in July. Throughout the remainder of the year, rainfall figures primarily remain under 2" (51mm).Temperature variations demonstrate a contrasting pattern. The warmest months range from June to September, with average high temperatures escalating to almost 88.7°F (31.5°C) in August. The coolest period extends from December to February, when temperatures remain mostly from 67.6°F (19.8°C) to 71.4°F (21.9°C). The humidity stays consistent throughout the year, oscillating between a minimum of 71% in May and peaking at 76% in December.
A unique feature of the city's weather conditions is the lesser amount of sunshine during the rainy season, from June to September, compared to the other months. While other months enjoy close to 10 hours of sunshine a day, the peak rainy season sees only about 3 to 5 sunshine days a month. Moreover, the highest sea temperature, reaching 86.7°F (30.4°C), coincides with the height of the rainy season in August.
The best time to visit Saint Petersburg
Considering individual preferences for weather conditions can differ, the prime time for visiting Saint Petersburg might vary. However, autumn emerges as an agreeable season in general terms. During this period, from September to November, the temperatures stand comfortable, oscillating between 75.6°F (24.2°C) to 82.2°F (27.9°C). The rainfall index decreases progressively, offering drier conditions, enhancing sightseeing opportunities. Furthermore, the daylight hours, stretching from 10.8 hours to 12.3 hours, accompanied by ample sunshine hours reaching to 9.1 hours in September, ensure visitors can bask in the pleasant weather.The worst time to visit Saint Petersburg
Humid and rainy conditions are prevalent from June to August, which could dissuade most tourists from planning their visit during these months. The rainfall peaks, exceeding 4" (102mm) and the number of rainy days reach 25 to 26 on an average. Concurrently, the number of sunshine days dips significantly to as few as 3 to 6 days in a month. The high temperatures, touching 88°F (31.1°C), coupled with high humidity levels and decreased sunshine days, result in a potentially challenging environment for outdoor activities.Spring weather in Saint Petersburg
Spring in Saint Petersburg is characterized by rising temperatures and moderate rainfall. March begins with lower temperatures hovering around 73.6°F (23.1°C) and progressively increases to 79.9°F (26.6°C) by May. Rainfall begins at a low of 0.91" (23mm) in March, escalating to 2.09" (53mm) by the end of the spring season. The daylight hours expand from 12 hours in March to 13.5 hours by May, complemented by copious sunshine, reaching a high of 11.2 hours by May end.Summer weather in Saint Petersburg
The summer season marks the highest temperatures and rainfall levels. Starting from June, temperatures soar from 84°F (28.9°C) to 88.7°F (31.5°C) in August, accompanied by rising humidity levels. Rainfall peaks in this season, ranging from 4.21" (107mm) in June to 5.24" (133mm) in July, with an average of 21 to 26 rainy days per month. Despite the increase in daylight hours, notably peaking to 13.9 hours in June, the prevalence of rains decreases the sunshine days, dipping to as low as 3.1 days in July.Autumn weather in Saint Petersburg
Autumn indicates a decrease in rainfall and temperature, offering a more pleasant climate. September begins with an average temperature of 87.3°F (30.7°C), lowering to 75.6°F (24.2°C) by November. The rainfall sees a substantial drop from 3.46" (88mm) in September to 0.75" (19mm) in November. The days remain relatively long, offering 10.8 to 12.3 daylight hours, while the number of sunshine days escalates from 5.3 days in September to 21 days by November end.Winter weather in Saint Petersburg
Winter months are mild in Saint Petersburg. The average high temperatures dwell between 67.6°F (19.8°C) and 71.4°F (21.9°C) from December to February. Rainfall levels take a downturn to its lowest, varying from 0.75" (19mm) to 1.54" (39mm). Daylight hours shorten to 10.4 hours in December, gradually extending to 11.2 hours by February. Despite the shorter days, the sunshine hours remain substantial, varying from 6.6 hours to 7.8 hours during these months.Weather in January
The year in Saint Petersburg, Florida, commences with mild conditions prevailing, setting the tone for a generally acceptable climate. Coming off the cooler conditions of December, January brings a modest change, reflected in the very slightest increase in temperature. Weather in January »Weather in February
Transitioning from January to February, Saint Petersburg, Florida, experiences a fractional elevation in several weather parameters. In a nod towards spring, temperatures modestly inch up, likewise humidity levels. In comparison to the later months, February carries on with a gentle breeze, indicative of the tranquil conditions. Weather in February »Weather in March
March manifests an unmistakable shift towards warmer times in Saint Petersburg, Florida. The rise in temperature, compared to February, ushers in a discernible change, further prolonged daylight and expanded sunshine hours support the welcome of spring. Weather in March »Weather in April
Saint Petersburg, Florida, witnesses a noticeable transformation in its weather throughout April. Compared to March, the warming continues, evidenced by extended sunshine hours. Summing to the agreeable conditions, the sea temperature demonstrates a significant increment, heralding the beach season. Weather in April »Weather in May
May marks the advent of summer in Saint Petersburg, Florida, underlined by intensified heat and an elongation in daylight duration. Drawing a comparison with April, May's climate is demonstrably warmer, while a rise in relative humidity makes its presence felt. Weather in May »Weather in June
June in Saint Petersburg, Florida, signifies the peak summer season, highlighted by elevated temperatures and lengthened days. Relative to May, the heat intensifies further, while extended daylight hours accentuate the sensation of summer. Weather in June »Weather in July
July delivers a continuity of the summer vibe in Saint Petersburg, Florida, with sustained high temperatures and bountiful daylight hours. Compared to June, the general ambient temperature remains similar; however, the sea temperature reaches its peak for the year. Weather in July »Weather in August
August sees the continuation of the summer atmosphere in Saint Petersburg, Florida but hints at a forthcoming change. Similar to July, high temperatures dominate, along with copious daylight hours, upholding the established summer motif. Weather in August »Weather in September
September in Saint Petersburg, Florida, witnesses the onset of a transition, marked by a subtle decrease in temperatures from August. A downward trend in daylight hours and sea temperatures accentuate the changing season from summer to autumn. Weather in September »Weather in October
October brings a discernible shift in weather to Saint Petersburg, Florida, with a palpable drop in temperatures compared to September. Along with cooling air temperatures, daylight hours reduce significantly, reinforcing the imminence of winter. Weather in October »Weather in November
November ushers in a cooler climate in Saint Petersburg, Florida, transitioning smoothly from the preceding month's weather. With light fading quicker as winter approaches, daylight hours shrink significantly compared to October. Weather in November »Weather in December
December in Saint Petersburg, Florida, consummates the year with the coolest conditions. While a steady decline from November's temperatures underlines the chill, daylight duration shrinks further, enhancing the winter experience. Weather in December »Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, on average, is the coldest month in Saint Petersburg, registering a high temperature of 67.6°F (19.8°C) and a low of 55.2°F (12.9°C).
In Saint Petersburg, during the entire year, the rain falls for 172.1 days and collects up to 27.2" (691mm) of precipitation.
With an average ocean temperature of 64°F (17.8°C), January is the month with the coldest seawater.
The month with the lowest UV index is January, with an average maximum UV index of 4.
The months with the least rainfall are February and November Rain falls for 7.6 days and accumulates 0.75" (19mm) of rain.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Saint Petersburg, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
With an average relative humidity of 71%, May is the least humid month.
May has the most sunshine of the year, with an average of 11.2h of sunshine.
May through September, with an average maximum UV index of 7, are months with the highest UV index.
June has the longest days of the year in Saint Petersburg, with an average of 13h and 54min of daylight.
The month with the most rainfall is July, when the rain falls for 26.2 days and typically aggregates up to 5.24" (133mm) of precipitation.
Saint Petersburg, Florida, witnesses the warmest weather in August, with temperatures averaging a high of 88.7°F (31.5°C) and a low of 79.5°F (26.4°C).
The month with the warmest seawater in Saint Petersburg is August, with an average ocean temperature of 86.7°F (30.4°C).
With an average relative humidity of 76%, December is the most humid month.
The month with the shortest days is December, with an average of 10h and 24min of daylight.
December has the least sunshine of the year, with an average of 6.6h of sunshine.
Average temperature
Saint Petersburg, FL
The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is January (67.6°F).
The month with the highest average low temperature is August (79.5°F).
The coldest month (with the lowest average low temperature) is January (55.2°F).
Average pressure
Saint Petersburg, FL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.02"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.99"Hg
- Average pressure in July:
30.02"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed
Saint Petersburg, FL
- Average wind speed in January:
8.9mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.9mph - Average wind speed in April:
8.6mph - Average wind speed in May:
7.9mph - Average wind speed in June:
6.9mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.9mph - Average wind speed in November:
8.9mph - Average wind speed in December:
8.6mph
The windiest months (with the highest average wind speed) are January, March, October and November (8.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity
Saint Petersburg, FL
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is May (71%).
Average rainfall
Saint Petersburg, FL
- Average rainfall in January:
0.83" - Average rainfall in February:
0.75" - Average rainfall in March:
0.91" - Average rainfall in April:
1.22" - Average rainfall in May:
2.09" - Average rainfall in June:
4.21"
- Average rainfall in July:
5.24" - Average rainfall in August:
4.76" - Average rainfall in September:
3.46" - Average rainfall in October:
1.46" - Average rainfall in November:
0.75" - Average rainfall in December:
1.54"
The wettest month (with the highest rainfall) is July (5.24").
The driest months (with the least rainfall) are February and November (0.75").
Average rainfall days
Saint Petersburg, FL
- Average rainfall days in January:
7.8 days - Average rainfall days in February:
7.6 days - Average rainfall days in March:
8.6 days - Average rainfall days in April:
11.7 days - Average rainfall days in May:
14.5 days - Average rainfall days in June:
21.1 days
- Average rainfall days in July:
26.2 days - Average rainfall days in August:
25.6 days - Average rainfall days in September:
21.7 days - Average rainfall days in October:
11.2 days - Average rainfall days in November:
7 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is July (26.2 days).
The month with the least rainy days is November (7 days).
Average sea temperature
Saint Petersburg, FL
The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64°F).
Average daylight / Average sunshine
Saint Petersburg, FL
- Average daylight in January:
10h and 36min - Average daylight in February:
11h and 12min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 48min - Average daylight in May:
13h and 30min - Average daylight in June:
13h and 54min
- Average daylight in July:
13h and 42min - Average daylight in August:
13h and 6min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 30min - Average daylight in November:
10h and 48min - Average daylight in December:
10h and 24min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in January:
7h and 18min - Average sunshine in February:
8h and 36min - Average sunshine in March:
8h and 42min - Average sunshine in April:
9h and 36min - Average sunshine in May:
11h and 12min - Average sunshine in June:
11h and 0min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
9h and 42min - Average sunshine in September:
9h and 6min - Average sunshine in October:
7h and 48min - Average sunshine in November:
6h and 48min - Average sunshine in December:
6h and 36min
The month with the most sunshine is May (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days
Saint Petersburg, FL
- Average sunshine days in January:
22.1 days - Average sunshine days in February:
18.5 days - Average sunshine days in March:
19.9 days - Average sunshine days in April:
16 days - Average sunshine days in May:
13.9 days - Average sunshine days in June:
6.1 days
- Average sunshine days in July:
3.1 days - Average sunshine days in August:
3.7 days - Average sunshine days in September:
5.3 days - Average sunshine days in October:
16.8 days - Average sunshine days in November:
21 days - Average sunshine days in December:
20 days
The month with the most sunshine days is January (22.1 days).
The month with the least sunshine days is July (3.1 days).
Average UV index
Saint Petersburg, FL
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover
Saint Petersburg, FL
The month with the most cloud cover is December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 21).
Average visibility
Saint Petersburg, FL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
