Climate averages 1991–2020
Port Saint Lucie weather
in May.
A hot, moderately wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Port Saint Lucie: daytime highs average 29.2°C and nights cool to about 21.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 74 mm of rain on roughly 10 days, which makes May a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 29 min on an average May day.
The nearest other city in this atlas is West Palm Beach (71 km away). In May its highs average 28.4°C, 0.8°C cooler than Port Saint Lucie, with 100 mm of rain.
Among the 498 cities listed in the United States, Port Saint Lucie ranks joint 50th of 498 for the warmest May highs and joint 195th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Port Saint Lucie is 5.4°C warmer than that mean.
From May to June, average highs rise by 1.1°C to 30.3°C, and monthly rainfall rises from 74 mm to 121 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
Port Saint Lucie climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.1°C14.8°C | 14.8°C | 51 | 7.0 | 10.611 h |
| February | 23.5°C15.7°C | 15.7°C | 46 | 6.5 | 11.211 h |
| March | 25.1°C17.2°C | 17.2°C | 57 | 7.0 | 12.012 h |
| April | 27.2°C19.4°C | 19.4°C | 56 | 7.1 | 12.813 h |
| May, selected | 29.2°C21.8°C | 21.8°C | 74 | 9.9 | 13.513 h |
| June | 30.3°C23.9°C | 23.9°C | 121 | 17.6 | 13.814 h |
| July | 31.0°C24.7°C | 24.7°C | 92 | 18.1 | 13.714 h |
| August | 30.9°C24.9°C | 24.9°C | 123 | 21.0 | 13.113 h |
| September | 29.6°C24.3°C | 24.3°C | 139 | 19.7 | 12.312 h |
| October | 27.7°C22.2°C | 22.2°C | 102 | 12.2 | 11.512 h |
| November | 25.1°C19.1°C | 19.1°C | 55 | 8.7 | 10.811 h |
| December | 23.2°C16.6°C | 16.6°C | 41 | 7.3 | 10.510 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
- West Palm Beach in MayUnited States · 71 kmHigh 28.4°C · Low 22.2°C · 100 mm rain
- Palm Bay in MayUnited States · 86 kmHigh 28.4°C · Low 21.8°C · 69 mm rain
- Boynton Beach in MayUnited States · 90 kmHigh 28.6°C · Low 22.3°C · 104 mm rain
- Melbourne, United States in MayUnited States · 91 kmHigh 28.1°C · Low 21.8°C · 69 mm rain
- Boca Raton in MayUnited States · 107 kmHigh 28.7°C · Low 22.2°C · 99 mm rain
- Deerfield Beach in MayUnited States · 111 kmHigh 28.8°C · Low 22.2°C · 99 mm rain
- Coral Springs in MayUnited States · 114 kmHigh 29.8°C · Low 21.8°C · 113 mm rain
- Pompano Beach in MayUnited States · 120 kmHigh 28.6°C · Low 22.5°C · 99 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 Port Saint Lucie) is explained once on the Port Saint Lucie year overview and on the Sources, method and limits page.