Climate averages 1991–2020
Port Saint Lucie weather
in August.
A hot, wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Port Saint Lucie: daytime highs average 30.9°C and nights cool to about 24.9°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 123 mm of rain on roughly 21 days, which makes August a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 06 min on an average August day.
The nearest other city in this atlas is West Palm Beach (71 km away). In August its highs average 30.3°C, 0.6°C cooler than Port Saint Lucie, with 166 mm of rain.
Among the 498 cities listed in the United States, Port Saint Lucie ranks joint 174th of 498 for the warmest August highs and joint 449th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Port Saint Lucie is 1.0°C warmer than that mean.
From August to September, average highs fall by 1.3°C to 29.6°C, and monthly rainfall rises from 123 mm to 139 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- West Palm Beach in AugustUnited States · 71 kmHigh 30.3°C · Low 25.3°C · 166 mm rain
- Palm Bay in AugustUnited States · 86 kmHigh 30.2°C · Low 25.0°C · 142 mm rain
- Boynton Beach in AugustUnited States · 90 kmHigh 30.5°C · Low 25.3°C · 159 mm rain
- Melbourne, United States in AugustUnited States · 91 kmHigh 30.1°C · Low 25.0°C · 142 mm rain
- Boca Raton in AugustUnited States · 107 kmHigh 30.6°C · Low 25.1°C · 142 mm rain
- Deerfield Beach in AugustUnited States · 111 kmHigh 30.7°C · Low 25.2°C · 142 mm rain
- Coral Springs in AugustUnited States · 114 kmHigh 31.1°C · Low 24.5°C · 182 mm rain
- Pompano Beach in AugustUnited States · 120 kmHigh 30.6°C · Low 25.3°C · 142 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.