Deltona climate — normals and trends
Deltona (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 21.4 °C and it receives 1,138 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (27.0 °C on average) and the coldest is January (14.5 °C). Rainfall peaks in August.
Deltona averages 3 frost days, 123 hot days (≥ 30 °C) and 150 rainy days per year.
Deltona has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.6 °C (on 1 June 1945) and the coldest -8.3 °C (on 21 January 1985).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
DeltonaFlorida
- coords
- 28.90°, -81.26°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
21.4°C
Average daily high
26.8°C
Average daily low
17.1°C
Annual rainfall
1,138mm
Sunshine / day
9.9h
Mean relative humidity
76%
Average peak wind
14.8km/h
Seasonal range
12.5°C
Frost days (< 0 °C)
3 d/yr
Hot days (≥ 30 °C)
123 d/yr
Rainy days (≥ 1 mm)
150 d/yr
Annual snowfall
0.0 cm
Average feels-like high
28.7 °C
Average feels-like low
18.1 °C
Average peak gust
33.1 km/h
Tropical nights (≥ 20 °C)
156 d/yr
Solar radiation
16.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.31 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
40.6 °C
1 June 1945
Coldest day
-8.3 °C
21 January 1985
Wettest day
193 mm
9 October 2024
Windiest day
63.1 km/h
19 October 1944
Strongest gust
145.4 km/h
19 October 1944
Hottest feels-like
44.7 °C
2 August 1999
Coldest feels-like
-14.6 °C
21 January 1985
Snowiest day
0.7 cm
9 January 2010
Sunniest day
13.1 h
28 June 2012
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 18.2 °C | -2.0 °C | 44 mm | -8 mm |
| Feb | 24.5 °C | +3.0 °C | 46 mm | -13 mm |
| Mar | 26.1 °C | +2.0 °C | 30 mm | -42 mm |
| Apr | 29.1 °C | +2.1 °C | 16 mm | -42 mm |
| May | 31.5 °C | +1.6 °C | 144 mm | +65 mm |
| Jun | 32.0 °C | +0.6 °C | 149 mm | -6 mm |
| Jul | 33.0 °C | +1.0 °C | 179 mm | +6 mm |
| Aug | 32.4 °C | +0.6 °C | 225 mm | +45 mm |
| Sep | 30.2 °C | -0.1 °C | 175 mm | +23 mm |
| Oct | 27.1 °C | -0.3 °C | 94 mm | +19 mm |
| Nov | 24.9 °C | +0.9 °C | 10 mm | -30 mm |
| Dec | 23.0 °C | +1.6 °C | 44 mm | -2 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Deltona?
Deltona has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 21.4 °C and it receives 1,138 mm of precipitation per year.
What is the hottest day ever recorded in Deltona?
The hottest day measured in Deltona between 1940 and 2025 was 1 June 1945, reaching 40.6 °C.
What is the coldest day in Deltona?
The coldest day measured in Deltona between 1940 and 2025 was 21 January 1985, at -8.3 °C.
Does it snow in Deltona?
Almost never: Deltona sees virtually no snow, with about 3 frost days per year.
Has the climate of Deltona warmed?
Yes: Deltona warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Deltona?
The wettest day measured in Deltona between 1940 and 2025 was 9 October 2024, with 193 mm of rain in 24 hours.
What was the windiest day in Deltona?
The windiest day measured in Deltona between 1940 and 2025 was 19 October 1944, with winds reaching 63.1 km/h.
What is the warmest month in Deltona?
The warmest month in Deltona is July (27.0 °C on average); the coldest is January (14.5 °C).
How much does it rain in Deltona?
Deltona receives on average 1,138 mm of precipitation per year, spread over about 150 rainy days.
Is it sunny in Deltona?
Deltona gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
What is the biggest single-day snowfall in Deltona?
The heaviest 24-hour snowfall measured in Deltona between 1940 and 2025 was 9 January 2010, with 0.7 cm.
Are there tropical nights in Deltona?
Yes: Deltona has on average 156 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Deltona?
In Deltona, between 1940 and 2025, the highest apparent temperature reached 44.7 °C on 2 August 1999, and the lowest was -14.6 °C on 21 January 1985.
Compare Deltona with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Deltona