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St. Petersburg (FL)
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United States weather

Weather in St. Petersburg, Florida for September 2026

Your guide to St. Petersburg weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Flood Warning - See hour by hour.

    • Temperatures

  • Until now, September 2026 in St. Petersburg has been nearly identical to the historical average, with a temperature of 30.8 °F (showing only a slight deviation of 0.1 °F).

  • The forecast for the next days in St. Petersburg predicts temperatures to be around 31 °F, close to the historical average.

  • In general, the average temperature in St. Petersburg at the beginning of September is 31 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 30.7 °F by the end of September.

    • Rain 🌧️

  • St. Petersburg experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 259 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
4
Dry days
Average rainy days
26
Rainy days
Average snowy days
0
Snow days
Average temperatures
30°/25°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
75 %
Avg humidity

St. Petersburg Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Moderate or heavy rain shower
31°
2
Overcast
31°
3
Partly cloudy
31°
4
Partly cloudy
31°
5
Overcast
31°
6
Overcast
31°
7
Partly cloudy
31°
8
Thundery outbreaks possible
30°
9
Patchy rain possible
30°
10
Weather Alert Patchy rain possible
31°
11
Thundery outbreaks possible
31°
12
Thundery outbreaks possible
32°
13
Overcast
32°
14
Overcast
32°
15
Sunny
33°
16
Sunny
33°
17
Sunny
32°
18
Sunny
31°
19
Overcast
30°
20
Patchy rain possible
31°
21
Patchy rain possible
29°
22
Sunny
31°
23
Sunny
30°
24
Moderate or heavy rain shower
32°
25
Thundery outbreaks possible
31°
26
Patchy light rain with thunder
30°
27
Light rain shower
30°
28
Light rain shower
30°
29
Light rain shower
31°
30
Patchy rain possible
31°

Temperatures trend during September in St. Petersburg

See the weather trend as well as the moving average line

September weather in St. Petersburg day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /25° 9.2 mm 8
Sept. 2 Overcast
Overcast
 31° /25° 45 mm 7
Sept. 3 Partly cloudy
Partly cloudy
 31° /25° 3 mm 6
Sept. 4 Partly cloudy
Partly cloudy
 31° /25° 58.1 mm 7
Sept. 5 Overcast
Overcast
 31° /26° 6 mm 8
Sept. 6 Overcast
Overcast
 31° /26° 8.4 mm 8
Sept. 7 Partly cloudy
Partly cloudy
 31° /26° 41.7 mm 8
Sept. 8 Thundery outbreaks possible
Thundery outbreaks possible
 30° /26° 6.3 mm 6
Sept. 9 Patchy rain possible
Patchy rain possible
 30° /25° 17 mm 6
Sept. 10 Patchy rain possible
Patchy rain possible
 31° /24° 0.7 mm 9.7
Sept. 11 Thundery outbreaks possible
Thundery outbreaks possible
 31° /28° 3.4 mm 9.9
Sept. 12 Thundery outbreaks possible
Thundery outbreaks possible
 32° /26° 17.8 mm 9.7
Sept. 13 Overcast
Overcast
 32° /26° 7.5 mm 9.5
Sept. 14 Overcast
Overcast
 32° /27° 3.9 mm 8
Sept. 15 Sunny
Sunny
 33° /28° 1 mm 8
Sept. 16 Sunny
Sunny
 33° /27° 0 mm 8
Sept. 17 Sunny
Sunny
 32° /27° 0.2 mm 8
Sept. 18 Sunny
Sunny
 31° /27° 0.1 mm 8
Sept. 19 Overcast
Overcast
 30° /29° 0.5 mm 8
Sept. 20 Patchy rain possible
Patchy rain possible
 31° /27° 5.1 mm 7
Sept. 21 Patchy rain possible
Patchy rain possible
 29° /27° 3.2 mm 7
Sept. 22 Sunny
Sunny
 31° /26° 0 mm 8
Sept. 23 Sunny
Sunny
 30° /25° 0 mm 7
Sept. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 32° /24° 5.5 mm 7
Sept. 25 Thundery outbreaks possible
Thundery outbreaks possible
 31° /25° 16.7 mm 7
Sept. 26 Patchy light rain with thunder
Patchy light rain with thunder
 30° /25° 22.3 mm 7
Sept. 27 Light rain shower
Light rain shower
 30° /26° 18.2 mm 7
Sept. 28 Light rain shower
Light rain shower
 30° /25° 11.4 mm 6
Sept. 29 Light rain shower
Light rain shower
 31° /25° 11.1 mm 7
Sept. 30 Patchy rain possible
Patchy rain possible
 31° /24° 2.1 mm 7
Next
Important Notice
Our weather forecast for St. Petersburg in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St. Petersburg forecast closer to your planned date for the most up-to-date weather information.
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St. Petersburg in September - FAQ

What are the expected maximum and minimum temperatures in St. Petersburg during September?
During September, expect a variety of temperatures with highs around 30° and lows near 25°, suitable for diverse activities and preferences.

How much rainfall should be expected in St. Petersburg during September?
Significant rainfall exceeding 259 mm is expected in St. Petersburg during September, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in St. Petersburg during September?
The average wind speed in St. Petersburg during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in St. Petersburg

Explore the daily rainfall trends and prepare for St. Petersburgs September weather 💧
Typically, St. Petersburg has 26 rainy days in September with a total of 259 mm of rainfall.

UV exposure in St. Petersburg during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is St. Petersburg?

Get accurate weather forecasts for St. Petersburg, located at latitude 27.771 and longitude -82.679. Stay updated with localized weather information tailored for St. Petersburg.

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