5-day weather forecast St. Petersburg Sep 22, 2026
31°Weather forecast St. Petersburg Tuesday Sep 22, 2026: sunny, temperature from 27 °C to 31 °C.
Precipitation probability 74%. Wind up to 7.19 m/s (gusts 8.53 m/s). Air humidity 57–78%, atmospheric pressure 759–761 mm Hg, UV index up to 8.
Weather Alerts
Small Craft Advisory issued September 16 at 3:19AM EDT until September 18 at 2:00AM EDT by NWS Tampa Bay Ruskin FL
Small Craft Advisory
* WHAT...Northeast winds 20 to 25 knots with gusts up to 30 knots
and seas 4 to 6 feet expected.
* WHERE...Portions of Gulf of America.
* WHEN...From 5 PM this afternoon to 2 AM EDT Friday.
* IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
Small Craft Advisory issued September 17 at 3:35AM EDT until September 18 at 2:00AM EDT by NWS Tampa Bay Ruskin FL
Small Craft Advisory
* WHAT...Northeast winds 20 to 25 knots with gusts up to 30
knots.
* WHERE...Portions of Gulf of America.
* WHEN...Until 2 AM EDT Friday.
* IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
5 days at a glance — tap a day to open it
Sunrise 07:19
Sunset 19:27
Sunset 19:27
Waxing Gibbous89% illuminated
Moonrise 17:24 · Moonset 03:42
Moonrise 17:24 · Moonset 03:42
Chart
Table
Tue, Sep 22, 2026
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light rain shower | 29 °C | 57% (1.37 mm/hr) | 83% | 64% | 760 mm Hg | ENE 66° 2.11 (2.19) m/s | 0 |
| 01:00 |  Clear | 29 °C | 5% | 12% | 67% | 760 mm Hg | E 87° 3.11 (3.31) m/s | 0 |
| 02:00 |  Patchy rain possible | 29 °C | 25% (0.21 mm/hr) | 86% | 64% | 759 mm Hg | SSE 162° 1.69 (2.03) m/s | 0 |
| 03:00 |  Overcast | 28 °C | 16% | 91% | 69% | 759 mm Hg | SSE 148° 3.61 (4.22) m/s | 0 |
| 04:00 |  Cloudy | 28 °C | 12% | 73% | 69% | 759 mm Hg | SSE 163° 2.61 (3.11) m/s | 0 |
| 05:00 | Cloudy | 29 °C | 12% | 75% | 66% | 759 mm Hg | S 174° 1.61 (2) m/s | 0 |
| 06:00 |  Partly cloudy | 28 °C | 7% | 28% | 69% | 759 mm Hg | SE 142° 2 (2.03) m/s | 0 |
| 07:00 | Clear | 28 °C | 6% | 8% | 70% | 760 mm Hg | SE 132° 2.19 (6.19) m/s | 0 |
| 08:00 | Sunny | 29 °C | 5% | 4% | 67% | 760 mm Hg | SE 144° 1.89 (4.89) m/s | 0.1 |
| 09:00 |  Partly cloudy | 28 °C | 8% | 29% | 72% | 761 mm Hg | ESE 113° 2.19 (5.19) m/s | 7 |
| 10:00 | Partly cloudy | 28 °C | 10% | 50% | 70% | 761 mm Hg | ESE 119° 1.61 (4.61) m/s | 7 |
| 11:00 | Sunny | 29 °C | 4% | 5% | 66% | 761 mm Hg | SE 140° 1.89 (6.89) m/s | 7 |
| 12:00 |  Patchy rain possible | 29 °C | 21% (0.1 mm/hr) | 88% | 65% | 761 mm Hg | SSE 149° 1.5 (4.5) m/s | 6 |
| 13:00 | Sunny | 29 °C | 4% | 5% | 65% | 761 mm Hg | S 175° 2 (5) m/s | 7 |
| 14:00 | Sunny | 30 °C | 4% | 12% | 62% | 761 mm Hg | SW 219° 1.81 (5.81) m/s | 7 |
| 15:00 | Sunny | 30 °C | 4% | 11% | 61% | 760 mm Hg | WSW 255° 2 (4.69) m/s | 8 |
| 16:00 | Sunny | 31 °C | 3% | 10% | 59% | 760 mm Hg | WNW 291° 2.11 (3.69) m/s | 8 |
| 17:00 | Sunny | 31 °C | 3% | 8% | 57% | 759 mm Hg | NNW 328° 2.31 (2.61) m/s | 8 |
| 18:00 |  Cloudy | 31 °C | 5% | 32% | 59% | 759 mm Hg | NNW 336° 2.5 (2.69) m/s | 7 |
| 19:00 | Sunny | 31 °C | 8% | 55% | 60% | 760 mm Hg | NNW 344° 2.69 (2.89) m/s | 8 |
| 20:00 | Cloudy | 31 °C | 11% | 78% | 62% | 760 mm Hg | N 353° 2.89 (3) m/s | 0 |
| 21:00 | Light rain shower | 30 °C | 46% (0.7 mm/hr) | 86% | 68% | 760 mm Hg | W 266° 4.31 (4.81) m/s | 0 |
| 22:00 | Cloudy | 29 °C | 63% (1.5 mm/hr) | 93% | 73% | 761 mm Hg | S 179° 5.81 (6.69) m/s | 0 |
| 23:00 | Light rain shower | 27 °C | 74% (2.21 mm/hr) | 100% | 78% | 761 mm Hg | E 93° 7.19 (8.53) m/s | 0 |
Tue, Sep 22, 2026
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Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.