St. Petersburg, Florida Weather
Fireflies pulse through the magnolias. Day 76 of spring. Read this microseason across nine climate regions →
St. Petersburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Light Drizzle18%0.01″86°75°—
- ThursdayJun 4Heavy Rain—0.47″88°72°+2°
- FridayJun 5Overcast——84°71°-4°
- SaturdayJun 6Overcast——87°74°+3°
- SundayJun 7Overcast15%—89°76°+2°
- MondayJun 8Light Drizzle27%—92°79°+3°
- TuesdayJun 9Light Drizzle30%—87°79°-5°
Ozone at AQI 45 — peak already passed at 1 PM under overcast skies. AQI up 13 over the last 6 hours (gradual rise). Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 45 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 45
- UV peak
- 0.7 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 45
PM × Wind × Precip
PM2.5/PM10 ratio 0.70 with 13 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.70
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- transport
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).
The higher the clouds, the finer the weather.
- Moonrise
- 2:43 AM
- Moonset
- 1:06 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
St. Petersburg at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: February 2 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — St. Petersburg
SPC has placed St. Petersburg in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- 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. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | lettuce, peas, spinach, radishes | — |
| March | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| April | tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | — | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
August brings St. Petersburg's peak heat (~84°F mean) while January delivers the year's coolest temperatures (~62°F). Rain follows a similar pattern, with August delivering 9.3 inches compared to November's dry 1.6 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 62° | 3.0″ | 5 |
| February | 65° | 2.2″ | 3 |
| March | 69° | 2.9″ | 4 |
| April | 74° | 2.6″ | 3 |
| May | 79° | 2.5″ | 3 |
| June | 83° | 7.2″ | 9 |
| July | 84° | 8.3″ | 11 |
| August | 84° | 9.3″ | 11 |
| September | 82° | 7.5″ | 10 |
| October | 77° | 2.5″ | 4 |
| November | 70° | 1.6″ | 3 |
| December | 65° | 2.8″ | 4 |
Regional context
St. Petersburg falls within a humid subtropical climate region that shares similar temperature ranges, seasonal patterns, and growing conditions with nearby cities.
Similar climates: Miami, FL, Tampa, FL, Orlando, FL, Jacksonville, FL, Cape Coral, FL.
Naturalist notes
Late May brings the arrival of ruby-throated hummingbirds returning from their winter grounds farther south.
Bougainvillea reaches peak flowering during May's warming temperatures, painting fences and walls in brilliant magenta and purple.
Frequently asked
- When does it freeze in St. Petersburg?
- St. Petersburg's last spring frost typically falls around mid-February, and the first fall frost arrives around mid-December.
- What is the rainy season in St. Petersburg?
- August is the wettest month with about 9.3 inches of rain on average; the city receives roughly 52 inches annually.
- What is the warmest month in St. Petersburg?
- August is typically warmest, averaging about 84°F.
- What is the coldest month in St. Petersburg?
- January is typically coldest, averaging about 62°F.
- When can I start a vegetable garden in St. Petersburg?
- Cool-season crops like peas and lettuce can be sown around the last spring frost in mid-February; warm-season crops such as tomatoes and peppers wait until 1–2 weeks after.
- How many rainy days does St. Petersburg get?
- St. Petersburg averages about 69 rainy days per year.
- What hardiness zone is St. Petersburg?
- St. Petersburg's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
St. Petersburg, Florida sits in a humid subtropical climate zone. Winter temperatures in January hover near 62°F while summer heat in July averages 84°F — a 22°F seasonal swing.
Throughout the year, St. Petersburg receives about 52 inches of precipitation spread over roughly 69 rainy days.
Location at 27.8°N latitude, proximity to large water bodies, and elevation combine to shape what grows here, when frost is likely, and what the weather story looks like day to day.