Climate averages 1991–2020
St. Petersburg weather
in May.
A warm, moderately wet month: the 5th warmest and the joint 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in St. Petersburg: daytime highs average 27.9°C and nights cool to about 22.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 53 mm of rain on roughly 7 days, which makes May a moderately wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average May day.
The nearest other city in this atlas is Largo (19 km away). In May its highs average 26.7°C, 1.2°C cooler than St. Petersburg, with 53 mm of rain.
Among the 498 cities listed in the United States, St. Petersburg ranks joint 101st of 498 for the warmest May highs and joint 144th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; St. Petersburg is 4.1°C warmer than that mean.
From May to June, average highs rise by 1.5°C to 29.4°C, and monthly rainfall rises from 53 mm to 136 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
St. Petersburg climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.2°C13.3°C | 13.3°C | 64 | 6.3 | 10.611 h |
| February | 20.1°C14.3°C | 14.3°C | 49 | 5.8 | 11.211 h |
| March | 22.1°C16.2°C | 16.2°C | 57 | 6.0 | 12.012 h |
| April | 25.0°C19.2°C | 19.2°C | 44 | 5.1 | 12.813 h |
| May, selected | 27.9°C22.1°C | 22.1°C | 53 | 6.7 | 13.514 h |
| June | 29.4°C24.7°C | 24.7°C | 136 | 16.1 | 13.914 h |
| July | 29.8°C25.5°C | 25.5°C | 135 | 20.0 | 13.714 h |
| August | 29.9°C25.6°C | 25.6°C | 146 | 21.2 | 13.113 h |
| September | 29.2°C24.7°C | 24.7°C | 139 | 15.8 | 12.312 h |
| October | 27.0°C21.8°C | 21.8°C | 63 | 7.1 | 11.512 h |
| November | 23.4°C17.8°C | 17.8°C | 42 | 4.2 | 10.811 h |
| December | 20.8°C15.1°C | 15.1°C | 53 | 5.6 | 10.410 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Largo in MayUnited States · 19 kmHigh 26.7°C · Low 22.6°C · 53 mm rain
- Clearwater in MayUnited States · 25 kmHigh 26.7°C · Low 22.5°C · 53 mm rain
- Town 'n' Country in MayUnited States · 28 kmHigh 28.7°C · Low 21.5°C · 65 mm rain
- Tampa in MayUnited States · 29 kmHigh 29.9°C · Low 20.7°C · 65 mm rain
- Brandon in MayUnited States · 43 kmHigh 30.5°C · Low 20.6°C · 65 mm rain
- Lakeland in MayUnited States · 78 kmHigh 30.6°C · Low 20.1°C · 70 mm rain
- Spring Hill in MayUnited States · 80 kmHigh 30.1°C · Low 20.3°C · 73 mm rain
- Fort Myers in MayUnited States · 152 kmHigh 30.9°C · Low 21.2°C · 74 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for St. Petersburg) is explained once on the St. Petersburg year overview and on the Sources, method and limits page.