Climate averages 1991–2020
Deerfield Beach weather
in September.
A hot, wet month: the 4th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Deerfield Beach: daytime highs average 29.7°C and nights cool to about 24.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 158 mm of rain on roughly 21 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 20 min on an average September day.
The nearest other city in this atlas is Boca Raton (5 km away). In September its highs average 29.6°C, about as warm as Deerfield Beach, with 158 mm of rain.
Among the 498 cities listed in the United States, Deerfield Beach ranks joint 141st of 498 for the warmest September highs and joint 486th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Deerfield Beach is 2.8°C warmer than that mean.
From September to October, average highs fall by 1.6°C to 28.1°C, and monthly rainfall falls from 158 mm to 115 mm.
The annual picture
September 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
Deerfield Beach climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.2°C16.3°C | 16.3°C | 51 | 7.4 | 10.711 h |
| February | 24.2°C17.0°C | 17.0°C | 45 | 6.9 | 11.311 h |
| March | 25.4°C18.1°C | 18.1°C | 58 | 8.1 | 12.012 h |
| April | 27.2°C20.2°C | 20.2°C | 67 | 8.7 | 12.813 h |
| May | 28.8°C22.2°C | 22.2°C | 99 | 11.6 | 13.413 h |
| June | 29.9°C24.2°C | 24.2°C | 154 | 20.0 | 13.814 h |
| July | 30.7°C24.9°C | 24.9°C | 113 | 19.5 | 13.614 h |
| August | 30.7°C25.2°C | 25.2°C | 142 | 21.1 | 13.113 h |
| September, selected | 29.7°C24.6°C | 24.6°C | 158 | 21.3 | 12.312 h |
| October | 28.1°C22.9°C | 22.9°C | 115 | 14.6 | 11.612 h |
| November | 25.8°C20.1°C | 20.1°C | 55 | 8.9 | 10.911 h |
| December | 24.2°C18.0°C | 18.0°C | 43 | 7.8 | 10.511 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
September in nearby cities
- Boca Raton in SeptemberUnited States · 5 kmHigh 29.6°C · Low 24.6°C · 158 mm rain
- Pompano Beach in SeptemberUnited States · 9 kmHigh 29.6°C · Low 24.8°C · 158 mm rain
- Coral Springs in SeptemberUnited States · 18 kmHigh 30.1°C · Low 24.1°C · 176 mm rain
- Fort Lauderdale in SeptemberUnited States · 22 kmHigh 29.3°C · Low 25.0°C · 172 mm rain
- Boynton Beach in SeptemberUnited States · 23 kmHigh 29.5°C · Low 24.8°C · 173 mm rain
- Davie in SeptemberUnited States · 31 kmHigh 29.5°C · Low 24.8°C · 172 mm rain
- Pembroke Pines in SeptemberUnited States · 37 kmHigh 29.4°C · Low 25.2°C · 172 mm rain
- Miami Gardens in SeptemberUnited States · 44 kmHigh 29.3°C · Low 25.3°C · 172 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 Deerfield Beach) is explained once on the Deerfield Beach year overview and on the Sources, method and limits page.
Pompano Beach and Boca Raton lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.