Deltona, FL weather in September
In September, Deltona sees highs around 89°F and lows around 73°F: hot and oppressively humid, with frequent rain. There are about 14 days with rain.
- Normal high
- 89°F
- Normal low
- 73°F
- Wet days
- 14
- 6.3 in total
- Muggy days
- 29
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 91°F | 87°F |
| Normal low | 74°F | 72°F |
| Chance of a wet day | 51% | 42% |
| Sunrise / sunset | 7:03 am / 7:47 pm | 7:17 am / 7:12 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 am74°Fdew point 71°F
- 9 am81°Fdew point 72°F
- Noon86°Fdew point 71°F
- 3 pm86°Fdew point 70°F
- 6 pm81°Fdew point 71°F
- 9 pm77°Fdew point 71°F
NOAA hourly normals (local standard time) from Orlando Sanford Airport (8 mi away); average wind 6 mph; clear or few clouds in 49% of daytime hours, mostly cloudy or overcast in 32%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 30
- Hot dayshigh 90°F or more17 of 30
- Muggy daysdaily mean dew point 65°F or more29 of 30
- Wet daysat least 0.01 in of rain or melted snow14 of 30
- Notable rainat least 0.10 in10 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 6.3 in; a dry September brings about 3.7 in and a wet one about 7.9 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 2 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202018: average high 92°F
- Coolest September1992: average high 88°F
- Wettest September2017: 15.4 in
- Driest September2008: 2.2 in
- Highest reading98°F (September 6, 1999)
- Lowest reading60°F (September 3, 1999)
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 | 92°F | 89°F | 84°F |
| Normal low | 75°F | 73°F | 67°F |
| Wet days | 18 | 14 | 9 |
| Comfortable days | 0 | 0 | 3 |
| Daylight | 13.2 h | 12.3 h | 11.5 h |
Highs change by -3°F from August and -5°F into October.
Nearby alternatives in September
- Drier: Gainesville, FL82 mi · high 88°F · 11 wet days
How Deltona ranks in September
- Normal high69th warmest of 378 cities; 9th of 23 in Florida
- Wet days356th driest of 378
- Comfortable days325th most of 342
What to pack for Deltona in September
- Light, breathable clothing – highs near 89°F and about 29 muggy days
- A rain jacket or umbrella – rain on about 14 days
Heating and cooling
September has 0 heating degree days and 486 cooling degree days (base 65°F), 12% of the year's total heating and cooling demand.
Questions
How hot is Deltona in September?
The normal high is 89°F and the normal low is 73°F. From 1991 to 2020 the hottest September reading was 98°F (September 6, 1999).
Does it rain a lot in Deltona in September?
About 14 days in September have at least 0.01 in of precipitation, and the normal total is 6.4 in. The wettest September in 1991-2020 was in 2017 (15.5 in); the driest was in 2008 (2.2 in).
Is September a good time to visit Deltona?
September ranks 10th of 12 months on our comfort score for Deltona (33 out of 100). It has almost no comfortable days and about 17 days at 90°F or hotter. The best months are January, February and March.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Sanford (USC00087982), 6.0 mi S of the city center, 12 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Orlando Sanford Airport (USW00012854), 8.4 mi S of the city center, 55 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Orlando Executive Airport (USW00012841), 25 mi S of the city center, 108 ft (76 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Orlando Sanford Airport (722057-12854), 8.4 mi S of the city center, 49 ft . Hourly observations, 1991-2020.