St. Petersburg, Florida Weather
Thunder quiets the land. Day 93 of summer. Read this microseason across nine climate regions →
St. Petersburg weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 12:30 AM EDT · Open-Meteo
- TodaySep 21Heavy Drizzle later20%0.04″87°72°—
- TuesdaySep 22Light Drizzle53%—85°74°-2°
- WednesdaySep 23Heavy Drizzle66%—88°81°+3°
- ThursdaySep 24Light Drizzle47%—89°79°+1°
- FridaySep 25Light Drizzle31%—89°77°0°
- SaturdaySep 26Overcast17%—86°75°-3°
- SundaySep 27Overcast22%—85°75°-1°
Air quality now AQI 40 · Good
AQI 40 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:33 PM
- Moonset
- 2:25 AM
- In sign
- ♑︎ Capricorn
Thunder quiets the land
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
St. Petersburg at a glance
- Today vs. normal: Today averages 80°F (high 87°F, low 72°F), about the 80°F normal for Sep 21
- Last frost: None in most years — 32°F in 11% of 1991–2020 years (NOAA station 5 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash; harvest beans, summer squash, winter squash
15-Day Forecast — St. Petersburg
- Mon87°73°20%
- Tue85°74°53%
- Wed88°81°66%
- Thu89°79°47%
- Fri89°77°31%
- Sat86°75°17%
- Sun85°75°22%
- Mon85°74°17%
- Tue86°75°32%
- Wed88°75°39%
- Thu85°77°49%
- Fri78°76°52%
- Sat87°78°55%
- Sun80°76°52%
- Mon80°74°40%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near St. Petersburg
Interactive wind and temperature map centered on St. Petersburg — it loads in your browser. Open the full weather map.
Right now in the garden
Year-round growing
As of September 21, sowing here runs through the year. Freezes are uncommon, so there is no frost date to plan around; heat and rainfall set the calendar instead. This city's planting calendar for September: plant lettuce, peas, spinach, radishes, tomatoes, peppers, beans, and squash; harvest beans, summer squash, and winter squash.
SPC Convective Outlook
Storm Prediction Center — St. Petersburg
SPC includes St. Petersburg in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in St. Petersburg
St. Petersburg sits in Pinellas County, where the year’s longest day runs 13h 54m of daylight and its shortest just 10h 23m — a swing of +3h 31m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Miami, the state’s largest city, lies about 205 miles to the SE. The nearest town St. Petersburg tracks is Tampa, roughly 19 miles to the NE.
Air quality in St. Petersburg
Air quality in St. Petersburg’s county has held roughly steady since 2020; its cleanest year on record was 2025 (median AQI 44). See the full air-quality history for St. Petersburg.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| February | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| March | lettuce, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| April | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| May | tomatoes, squash | tomatoes, peppers, beans, summer squash, winter squash |
| June | tomatoes, peppers, squash | tomatoes, peppers, beans, summer squash, winter squash |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, summer squash, winter squash |
| August | lettuce, peas, tomatoes, peppers, beans, squash | summer squash, winter squash |
| September | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | beans, summer squash, winter squash |
| October | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| November | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
A year in weather
St. Petersburg peaks at about 82°F in August and bottoms near 61°F in January; August brings the heaviest rain (5.8 inches) and November the least (1.5 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 61° | 2.8″ |
| February | 62° | 2.7″ |
| March | 66° | 2.8″ |
| April | 71° | 2.2″ |
| May | 77° | 1.8″ |
| June | 81° | 4.7″ |
| July | 82° | 5.4″ |
| August | 82° | 5.8″ |
| September | 80° | 4.8″ |
| October | 76° | 2.2″ |
| November | 68° | 1.5″ |
| December | 64° | 2.3″ |
Regional context
Similar climates Lealman, FL, Kenneth City, FL, Gulfport, FL
St. Petersburg swings from 61°F in January to 82°F in July (21°F) per modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo); precipitation in St. Petersburg runs about 39 inches.
Precipitation in St. Petersburg runs summer-dominant: August averages 5.8 inches from warm-season storms, while November drops to 1.5 inches under drier cool air. That summer-storm rhythm groups St. Petersburg with places like Lealman, FL, Kenneth City, FL and Gulfport, FL.
Hard freezes are rare in St. Petersburg: the coldest month averages 61°F, so St. Petersburg's growing window runs most of the year. August is the hottest stretch near 82°F, pushing cool-season crops to the milder shoulder months. St. Petersburg beds by a wall stay warmer at night.
Similar climates: Lealman, FL, Kenneth City, FL, Gulfport, FL, Bear Creek, FL, West Lealman, FL.
Frequently asked
- When does it freeze in St. Petersburg?
- Most years St. Petersburg doesn't freeze: the nearest NOAA station reached 32°F in 11% of 1991–2020 years, so St. Petersburg has no reliable frost date.
- What is the rainy season in St. Petersburg?
- August is the wettest month in St. Petersburg, about 5.8 inches on average; the year totals roughly 39 inches.
- What is the warmest month in St. Petersburg?
- The warmest stretch in St. Petersburg comes in August, around 82°F on average.
- What is the coldest month in St. Petersburg?
- On average January is the chilliest month in St. Petersburg, about 61°F.
- When can I start a vegetable garden in St. Petersburg?
- Any season works in St. Petersburg: without a reliable freeze, St. Petersburg's heat, not frost, decides when greens and tomatoes do best.
- What hardiness zone is St. Petersburg?
- St. Petersburg sits in the USDA zone set by January lows near 61°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for St. Petersburg?
- St. Petersburg's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in St. Petersburg?
- See this week's day-by-day rain chances for St. Petersburg in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in St. Petersburg?
- Current conditions for St. Petersburg and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the St. Petersburg forecast updated?
- The St. Petersburg forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in St. Petersburg?
- Today's sunrise and sunset times for St. Petersburg are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for St. Petersburg?
- The next few days in St. Petersburg's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
St. Petersburg sits at 27.8°N; its climate zone is humid subtropical (Köppen approximation).
ZIP codes in St. Petersburg
- 33701
- 33702
- 33703
- 33704
- 33705
- 33707
- 33710
- 33711
- 33712
- 33713
- 33714
- 33715
- 33716
- 33729
- 33731
- 33732
- 33733
- 33734
- 33742
- 33743
- 33747
- 33762