St. Petersburg weather in May: St. Petersburg, Florida: normal highs, lows, rain and records for May
St. Petersburg in May has a normal high of 87°F and a normal low of 70°F, a daily mean of 78°F, rising from 85°F on the 1st to 89°F by the 31st. Measurable precipitation falls on 6 days in a normal May, 2.73 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 21°C, 69 mm of precipitation in May.
- 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 May?
The normal high is 87°F and the normal low 70°F, for a daily mean of 78.4°F. May is 5.4°F warmer than April and 3.7°F cooler than June. May is the 5th warmest month of the year in St. Petersburg and the 6th wettest. Across the month the normal high rises 4°F, from 85°F on May 1 to 89°F on May 31. From one year to the next May's mean temperature typically moves about 1.4°F either way (NOAA's standard deviation), so roughly two Mays in three average between 77°F and 80°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 85°F | 67°F | 18% | 11% |
| May 8 | 86°F | 68°F | 19% | 12% |
| May 15 | 87°F | 70°F | 22% | 15% |
| May 22 | 88°F | 71°F | 27% | 18% |
| May 31 | 89°F | 73°F | 34% | 23% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 85°F | 67°F | 18% | 11% | 13 h 10 min |
| May 2 | 85°F | 67°F | 18% | 12% | 13 h 10 min |
| May 3 | 85°F | 67°F | 18% | 12% | 13 h 20 min |
| May 4 | 85°F | 68°F | 18% | 12% | 13 h 20 min |
| May 5 | 86°F | 68°F | 18% | 12% | 13 h 20 min |
| May 6 | 86°F | 68°F | 18% | 12% | 13 h 20 min |
| May 7 | 86°F | 68°F | 19% | 12% | 13 h 20 min |
| May 8 | 86°F | 68°F | 19% | 12% | 13 h 20 min |
| May 9 | 86°F | 68°F | 19% | 13% | 13 h 20 min |
| May 10 | 86°F | 69°F | 20% | 13% | 13 h 20 min |
| May 11 | 87°F | 69°F | 20% | 13% | 13 h 30 min |
| May 12 | 87°F | 69°F | 21% | 14% | 13 h 30 min |
| May 13 | 87°F | 69°F | 21% | 14% | 13 h 30 min |
| May 14 | 87°F | 69°F | 22% | 14% | 13 h 30 min |
| May 15 | 87°F | 70°F | 22% | 15% | 13 h 30 min |
| May 16 | 87°F | 70°F | 23% | 15% | 13 h 30 min |
| May 17 | 87°F | 70°F | 24% | 16% | 13 h 30 min |
| May 18 | 88°F | 70°F | 24% | 16% | 13 h 30 min |
| May 19 | 88°F | 70°F | 25% | 17% | 13 h 40 min |
| May 20 | 88°F | 71°F | 26% | 17% | 13 h 40 min |
| May 21 | 88°F | 71°F | 26% | 17% | 13 h 40 min |
| May 22 | 88°F | 71°F | 27% | 18% | 13 h 40 min |
| May 23 | 88°F | 71°F | 28% | 18% | 13 h 40 min |
| May 24 | 88°F | 71°F | 28% | 19% | 13 h 40 min |
| May 25 | 88°F | 72°F | 29% | 19% | 13 h 40 min |
| May 26 | 89°F | 72°F | 30% | 20% | 13 h 40 min |
| May 27 | 89°F | 72°F | 31% | 20% | 13 h 40 min |
| May 28 | 89°F | 72°F | 31% | 21% | 13 h 40 min |
| May 29 | 89°F | 72°F | 32% | 22% | 13 h 40 min |
| May 30 | 89°F | 73°F | 33% | 22% | 13 h 50 min |
| May 31 | 89°F | 73°F | 34% | 23% | 13 h 50 min |
- Normal high
- 87°FMay average
- Normal low
- 70°FMay average
- Precipitation
- 2.73 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 9
- Daylight
- 13 h 10 min to 13 h 50 minMay 1 to May 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 30
- Sunshine
- 88%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 May?
On a given May day the chance of 0.01 inch or more is 24% on average, highest around May 31 (34%). In all, 2.73 in falls on 6 days of a normal May, 1 of them with an inch or more.
In a normal May in St. Petersburg, 9 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012873.
How humid and windy is St. Petersburg in May?
At 3 p.m. the normal temperature is 87°F with 56% relative humidity and a dew point of 69°F; at 6 a.m. it is 74°F with 88% humidity. The wind averages 8.3 mph, most often from the west 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. | 74°F | 71°F | 88% | 5.5 mph | 75% |
| 9 a.m. | 81°F | 71°F | 72% | 8.7 mph | 62% |
| noon | 85°F | 70°F | 60% | 9.7 mph | 54% |
| 3 p.m. | 87°F | 69°F | 56% | 10.5 mph | 58% |
| 6 p.m. | 83°F | 70°F | 64% | 10.7 mph | 68% |
| 9 p.m. | 79°F | 70°F | 76% | 7.9 mph | 74% |
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 May in St. Petersburg?
The warmest May temperature on this station's record (since 1998) is 97°F, on May 30, 2024; the coldest is 57°F, on May 7, 2017. The wettest May brought 10.14 in (2018).
The May mean against the 1991-2020 normal of 78.4°F: 2021 80.6°F (+2.2), 2022 79.8°F (+1.4), 2023 78.5°F (at normal), 2024 82.2°F (+3.8), 2025 81.8°F (+3.4), 2026 82.1°F (+3.7). 5 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 80.6°F | +2.2°F | 0.01 in |
| 2022 | 79.8°F | +1.4°F | 0.05 in |
| 2023 | 78.5°F | at normal | 3.29 in |
| 2024 | 82.2°F | +3.8°F | 0.98 in |
| 2025 | 81.8°F | +3.4°F | 3.28 in |
| 2026 | 82.1°F | +3.7°F | 6.09 in |
Source: records: ACIS, station USW00012873; recent months: ACIS, station USW00012873. Records and recent months use complete months only.
How does May in St. Petersburg compare across Florida?
Across the 106 places PlainClimate covers in Florida, May normal highs run from 83°F in Miami Beach to 91°F in Plant City; St. Petersburg's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.