St. Petersburg weather in August: St. Petersburg, Florida: normal highs, lows, rain and records for August
St. Petersburg in August has a normal high of 91°F and a normal low of 76°F, a daily mean of 84°F, holding near 91°F all month. Measurable precipitation falls on 17 days in a normal August, 8.83 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 25°C, 224 mm of precipitation in August.
- NOAA stationSt Petersburg International Airport
- Station IDUSW00012873
- Location27.91°N 82.69°W
- Elevation11 ft (3 m)
- From the center11 miles
- Population267,102
- Jan 71° 53°
- Feb 73° 55°
- Mar 77° 59°
- Apr 82° 64°
- May 87° 70°
- Jun 90° 75°
- Jul 90° 76°
- Aug 91° 76°
- Sep 89° 75°
- Oct 84° 70°
- Nov 77° 61°
- Dec 73° 56°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is St. Petersburg in August?
The normal high is 91°F and the normal low 76°F, for a daily mean of 83.5°F. August is 0.4°F warmer than July and 1.4°F warmer than September. August is the warmest month of the year in St. Petersburg and the 3rd wettest. Across the month the normal high falls 1°F, from 91°F on August 1 to 90°F on August 31. From one year to the next August's mean temperature typically moves about 0.8°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 83°F and 84°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 58%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 91°F | 76°F | 58% | 41% |
| August 8 | 91°F | 76°F | 57% | 40% |
| August 15 | 91°F | 76°F | 56% | 40% |
| August 22 | 91°F | 76°F | 54% | 39% |
| August 31 | 90°F | 76°F | 51% | 36% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 29)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 91°F | 76°F | 58% | 41% | 13 h 30 min |
| August 2 | 91°F | 76°F | 58% | 41% | 13 h 30 min |
| August 3 | 91°F | 76°F | 58% | 41% | 13 h 30 min |
| August 4 | 91°F | 76°F | 58% | 41% | 13 h 20 min |
| August 5 | 91°F | 76°F | 58% | 41% | 13 h 20 min |
| August 6 | 91°F | 76°F | 58% | 41% | 13 h 20 min |
| August 7 | 91°F | 76°F | 57% | 41% | 13 h 20 min |
| August 8 | 91°F | 76°F | 57% | 40% | 13 h 20 min |
| August 9 | 91°F | 76°F | 57% | 40% | 13 h 20 min |
| August 10 | 91°F | 76°F | 57% | 40% | 13 h 20 min |
| August 11 | 91°F | 76°F | 57% | 40% | 13 h 20 min |
| August 12 | 91°F | 76°F | 56% | 40% | 13 h 10 min |
| August 13 | 91°F | 76°F | 56% | 40% | 13 h 10 min |
| August 14 | 91°F | 76°F | 56% | 40% | 13 h 10 min |
| August 15 | 91°F | 76°F | 56% | 40% | 13 h 10 min |
| August 16 | 91°F | 76°F | 56% | 40% | 13 h 10 min |
| August 17 | 91°F | 76°F | 55% | 40% | 13 h 10 min |
| August 18 | 91°F | 76°F | 55% | 40% | 13 h 10 min |
| August 19 | 91°F | 76°F | 55% | 39% | 13 h |
| August 20 | 91°F | 76°F | 55% | 39% | 13 h |
| August 21 | 91°F | 76°F | 54% | 39% | 13 h |
| August 22 | 91°F | 76°F | 54% | 39% | 13 h |
| August 23 | 91°F | 76°F | 54% | 39% | 13 h |
| August 24 | 90°F | 76°F | 54% | 38% | 13 h |
| August 25 | 90°F | 76°F | 53% | 38% | 13 h |
| August 26 | 90°F | 76°F | 53% | 38% | 12 h 50 min |
| August 27 | 90°F | 76°F | 53% | 38% | 12 h 50 min |
| August 28 | 90°F | 76°F | 52% | 37% | 12 h 50 min |
| August 29 | 90°F | 76°F | 52% | 37% | 12 h 50 min |
| August 30 | 90°F | 76°F | 52% | 37% | 12 h 50 min |
| August 31 | 90°F | 76°F | 51% | 36% | 12 h 50 min |
- Normal high
- 91°FAugust average
- Normal low
- 76°FAugust average
- Precipitation
- 8.83 inmonth total
- Days with precipitation
- 170.01 inch or more
- Days at 90°F or more
- 24
- Daylight
- 13 h 30 min to 12 h 50 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00012873; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in St. Petersburg in August?
On a given August day the chance of 0.01 inch or more is 55% on average, highest around August 1 (58%). In all, 8.83 in falls on 17 days of a normal August, 3 of them with an inch or more.
In a normal August in St. Petersburg, 24 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012873.
How humid and windy is St. Petersburg in August?
At 3 p.m. the normal temperature is 88°F with 63% relative humidity and a dew point of 74°F; at 6 a.m. it is 78°F with 90% humidity. The wind averages 7.5 mph, most often from the northwest in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 78°F | 75°F | 90% | 6.0 mph | 77% |
| 9 a.m. | 83°F | 75°F | 77% | 7.9 mph | 67% |
| noon | 87°F | 74°F | 66% | 8.5 mph | 49% |
| 3 p.m. | 88°F | 74°F | 63% | 9.1 mph | 49% |
| 6 p.m. | 84°F | 74°F | 71% | 9.3 mph | 59% |
| 9 p.m. | 81°F | 74°F | 81% | 6.8 mph | 72% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00012873. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in St. Petersburg?
The warmest August temperature on this station's record (since 1998) is 98°F, on August 13, 2023; the coldest is 71°F, on August 14, 2008. The wettest August brought 15.17 in (2024).
The August mean against the 1991-2020 normal of 83.5°F: 2021 84.4°F (+0.9), 2022 83.2°F (−0.3), 2023 87.0°F (+3.5), 2024 85.6°F (+2.1), 2025 84.5°F (+1.0), 2026 83.8°F (+0.3). 5 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 84.4°F | +0.9°F | 10.16 in |
| 2022 | 83.2°F | −0.3°F | 8.93 in |
| 2023 | 87.0°F | +3.5°F | 4.72 in |
| 2024 | 85.6°F | +2.1°F | 15.17 in |
| 2025 | 84.5°F | +1.0°F | 8.29 in |
| 2026 | 83.8°F | +0.3°F | 11.25 in |
Source: records: ACIS, station USW00012873; recent months: ACIS, station USW00012873. Records and recent months use complete months only.
How does August in St. Petersburg compare across Florida?
Across the 106 places PlainClimate covers in Florida, August normal highs run from 88°F in Palm Coast to 94°F in Plant City; St. Petersburg's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- St. Petersburg in July90°F by day, 76°F at night
- St. Petersburg in September89°F by day, 75°F at night
- St. Petersburg through the yearEvery month, frost dates, records and recent years
- Florida in AugustThe statewide normal and the warmest and coolest places
- Plant City: Florida's warmest Augustnormal high 94°F