Deltona in Summer
In summer (June, July and August), Deltona sees average daytime highs around 90°F and overnight lows near 74°F, with 20.4 in of rain over about 68 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 90°F. The sky is clear or mostly clear about 17% of the time across summer, and the air most often feels oppressive.
Summer is Deltona's weakest season of the year to visit on our travel score. For the whole year in context, see Deltona's year-round climate.
- Avg daytime high
- 90°F
- warmest season of the year
- Avg overnight low
- 74°F
- Rainfall
- 20.4 in
- 68 wet days
- Avg wind
- 5 mph
- Travel score
- 2.8
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Deltona in Summer
Across summer, daytime highs hold fairly steady around 90°F.
A typical summer day in Deltona reaches about 90°F and drops to 74°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Deltona
Once humidity and wind are folded in, summer brings about 92 days that feel above 90°F and 0 that feel at or below 32°F.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Deltona weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 69° / 50° | 2.2 | 6.4 | 10.4 | 7.0 |
| Feb | 72° / 52° | 2.1 | 7 | 11 | 7.1 |
| Mar | 76° / 56° | 2.4 | 6.7 | 11.8 | 7.5 |
| Apr | 81° / 62° | 2.4 | 7.4 | 12.7 | 6.8 |
| May | 86° / 68° | 3.2 | 10.1 | 13.4 | 5.1 |
| Jun | 89° / 73° | 6.4 | 20.4 | 13.8 | 3.1 |
| Jul | 90° / 75° | 6.7 | 23.7 | 13.7 | 2.6 |
| Aug | 90° / 75° | 7.3 | 24 | 13 | 2.7 |
| Sep | 87° / 73° | 5.8 | 19.2 | 12.2 | 3.6 |
| Oct | 82° / 67° | 3.0 | 10.5 | 11.3 | 6.1 |
| Nov | 76° / 58° | 1.4 | 6.3 | 10.6 | 7.5 |
| Dec | 71° / 53° | 2.1 | 6.1 | 10.2 | 7.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 17% of the time across summer.
Chance of precipitation in Summer
Deltona gets around 20.4 in of rain over 68 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 42 min in early June to 12 h 36 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.7 kWh/m².
Hazard calendar for Deltona
In summer, Deltona overlaps its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.
Deltona sits in the Atlantic hurricane belt; the season peaks August–October.
Deltona's rainy season runs June–September, when most of the year's rain falls.
Is summer a good time to visit Deltona?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Deltona.
What to pack for Deltona in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Deltona sees daytime highs around 90°F and nights near 74°F. Pack light clothes and rain gear. Worth having: sun protection. About 68 days see rain.
Sea temperature near Deltona in Summer
The nearest coast averages about 81°F across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 28 mi away) is warmest in September at about 82°F and coldest in February near 67°F.
It's comfortable for a long swim from Mar 15 to Jan 17 — about 10.2 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 68 | 67 | 68 | 71 | 76 | 80 | 82 | 82 | 82 | 79 | 74 | 70 |
| Comfort | Refreshing | Cool | Refreshing | Refreshing | Warm | Warm | Warm | Warm | Warm | Warm | Refreshing | Refreshing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 68 | Refreshing |
| Feb | 67 | Cool |
| Mar | 68 | Refreshing |
| Apr | 71 | Refreshing |
| May | 76 | Warm |
| Jun | 80 | Warm |
| Jul | 82 | Warm |
| Aug | 82 | Warm |
| Sep | 82 | Warm |
| Oct | 79 | Warm |
| Nov | 74 | Refreshing |
| Dec | 70 | Refreshing |
UV index in Deltona in Summer
Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Deltona peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 6 | 8 | 8 | 9 | 10 | 11 | 10 | 9 | 7 | 5 | 4 |
| Level | Moderate | High | Very high | Very high | Very high | Extreme | Extreme | Very high | Very high | High | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 6 | High |
| Mar | 8 | Very high |
| Apr | 8 | Very high |
| May | 9 | Very high |
| Jun | 10 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Very high |
| Sep | 9 | Very high |
| Oct | 7 | High |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Air quality in Deltona in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Deltona is worst in March — around 17 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 8 | 17 | 10 | 11 | 17 | 16 | 15 | 10 | 7 | 7 | 6 |
| Level | Good | Good | Moderate | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 8 | Good |
| Mar | 17 | Moderate |
| Apr | 10 | Good |
| May | 11 | Good |
| Jun | 17 | Moderate |
| Jul | 16 | Moderate |
| Aug | 15 | Moderate |
| Sep | 10 | Good |
| Oct | 7 | Good |
| Nov | 7 | Good |
| Dec | 6 | Good |
Where is Deltona?
Deltona sits at 28.9°N, 81.3°W, 30 ft above sea level, in United States. The nearest listed city is DeBary, 3.1 mi away.
Topography around Deltona
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Deltona.
Within 2 miles, the terrain around Deltona has only modest variations in elevation — a maximum elevation change of 108 ft around an average of 62 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 138 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 322 ft.
The land around Deltona is covered by trees (50%) and artificial surfaces (35%) within 2 miles, trees (66%) within 10 miles, and trees (53%) and water (26%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Deltona (28.9005°, -81.2637°, elevation 30 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.