Naples, FL weather in September
Expect hot, oppressively humid weather with rain on most days in Naples in September, with highs near 90°F and lows near 72°F. Rain falls on about 17 days. Plan outdoor time for mornings and evenings.
- Normal high
- 90°F
- Normal low
- 72°F
- Wet days
- 17
- 10.0 in total
- Muggy days
- 30
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 91°F | 88°F |
| Normal low | 73°F | 71°F |
| Chance of a wet day | 60% | 50% |
| Sunrise / sunset | 7:07 am / 7:47 pm | 7:19 am / 7:15 pm |
| Daylight | 12.7 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am75°Fdew point 73°F
- 9 am82°Fdew point 74°F
- Noon87°Fdew point 73°F
- 3 pm87°Fdew point 72°F
- 6 pm82°Fdew point 72°F
- 9 pm78°Fdew point 73°F
NOAA hourly normals (local standard time) from Ft Myers Sw Fl Rgnl Airport (27 mi away); average wind 6 mph; clear or few clouds in 53% of daytime hours, mostly cloudy or overcast in 24%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph13 of 30
- Hot dayshigh 90°F or more22 of 30
- Muggy daysdaily mean dew point 65°F or more30 of 30
- Wet daysat least 0.01 in of rain or melted snow17 of 30
- Notable rainat least 0.10 in13 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 10.0 in; a dry September brings about 6.3 in and a wet one about 12.9 in (25th and 75th percentiles). About 6 days bring half an inch or more, and about 3 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202009: average high 93°F
- Coolest September2015: average high 88°F
- Wettest September2017: 19.0 in
- Driest September1997: 3.4 in
- Highest reading96°F (September 28, 2020)
- Lowest reading63°F (September 14, 2012)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 91°F | 90°F | 86°F |
| Normal low | 73°F | 72°F | 68°F |
| Wet days | 20 | 17 | 10 |
| Comfortable days | 0 | 0 | 1 |
| Daylight | 13.0 h | 12.3 h | 11.5 h |
Highs change by -1°F from August and -4°F into October.
Nearby alternatives in September
- Drier: Tampa, FL131 mi · high 90°F · 13 wet days
How Naples ranks in September
- Normal high60th warmest of 378 cities; 6th of 23 in Florida
- Wet days369th driest of 378
- Comfortable days330th most of 342
What to pack for Naples in September
- Light, breathable clothing – highs near 90°F and about 30 muggy days
- A rain jacket or umbrella – rain on about 17 days
- A swimsuit – about 13 beach days
Heating and cooling
September has 0 heating degree days and 474 cooling degree days (base 65°F), 12% of the year's total heating and cooling demand.
Questions
How hot is Naples in September?
The normal high is 90°F and the normal low is 72°F. From 1991 to 2020 the hottest September reading was 96°F (most recently on September 28, 2020).
Does it rain a lot in Naples in September?
About 17 days in September have at least 0.01 in of precipitation, and the normal total is 10.0 in. The wettest September in 1991-2020 was in 2017 (19.0 in); the driest was in 1997 (3.4 in).
Is September a good time to visit Naples?
September ranks 11th of 12 months on our comfort score for Naples (28 out of 100). It has almost no comfortable days and about 22 days at 90°F or hotter. The best months are January and March.
Where the numbers come from
- Temperature, rain and frost dates: Naples (USC00086078), 7.0 mi ENE of the city center, 40 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Naples Muni Airport (USW00012897), 1.4 mi ENE of the city center, 9 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Ft Myers Sw Fl Rgnl Airport (USW00012894), 27 mi N of the city center, 31 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Naples Municipal Airport (722038-12897), 1.5 mi NE of the city center, 7 ft . Hourly observations, 1991-2020.