Photo: Connor J. Williams · CC BY 3.0Deltona has some of the mildest winter nights among U.S. towns
In July the day’s top temperature is typically 92°. By precipitation alone, it ranks wetter than 89% of U.S. towns. Decade by decade the climate has edged up, 1.6° above 1901–2000. Long walks are most pleasant from October to April, when afternoons reach 70–84°.
A year in Deltona at a glance
Each month’s typical high and low, and what it brings.
What stands out about Deltona’s climate
Compared with towns across the U.S., with Deltona’s place in Florida beside it.
What a year in Deltona feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
A freeze most winters
Frost and day counts come from NOAA’s station at Sanford, FL, 7 miles from the city’s center point, at about the same height.
The 2023 USDA map puts Deltona’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 29°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 52 inches of rain a year
June is the wettest month and November the driest. Rain falls on about 124 days a year. Snow is rare: about 0.0" in a normal year at Sanford, FL, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Deltona
15% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Sanford, FL.
Living with Deltona’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 9b. Frost comes about 5 winters in 10, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, October, November and December. 16 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Deltona from natural hazards, river flooding is the largest share (43%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Deltona and its neighbors
Every town next door is within a degree of Deltona in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Deltona’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Deltona, FL | 49° | 92° | 52" | 0.0" |
| Lake Jackson, TX | 45° | 92° | 50" | 0.0" |
| St. Simons, GA | 43° | 91° | 49" | 0.0" |
| Morgan City, LA | 44° | 91° | 60" | 0.0" |
| Hilton Head Island, SC | 41° | 90° | 49" | 0.0" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Deltona averaged 1.6° warmer than the 1900s. The biggest change is in December (+2.4°).
A bigger shift than in 63% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods. In a city of 100,000 people, part of the change is the city itself: pavement and buildings hold heat (the urban heat island).
How Deltona compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Deltona’s place among Florida’s.
Deltona weather by month
Highs, lows and precipitation from NOAA’s grid at Deltona’s center; snow, wet days and snow on the ground from Sanford, FL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 70° | 49° | 2.8" | 0.0" | 8 | 0 | 53° – 65° |
| February | 73° | 51° | 2.3" | 0.0" | 7 | 0 | 53° – 70° |
| March | 78° | 55° | 3.3" | 0.0" | 7 | 0 | 60° – 72° |
| April | 83° | 60° | 2.5" | 0.0" | 7 | 0 | 66° – 76° |
| May | 87° | 66° | 3.5" | 0.0" | 8 | 0 | 73° – 80° |
| June | 90° | 71° | 7.9" | 0.0" | 16 | 0 | 79° – 85° |
| July | 92° | 73° | 7.2" | 0.0" | 16 | 0 | 81° – 85° |
| August | 92° | 74° | 7.3" | 0.0" | 18 | 0 | 81° – 85° |
| September | 89° | 72° | 6.7" | 0.0" | 14 | 0 | 78° – 83° |
| October | 84° | 66° | 4.0" | 0.0" | 9 | 0 | 71° – 79° |
| November | 77° | 58° | 2.2" | 0.0" | 7 | 0 | 63° – 74° |
| December | 72° | 52° | 2.4" | 0.0" | 7 | 0 | 50° – 71° |
| Year | 82° | 62° | 52.0" | 0.0" | 124 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 50° to 71°. August is the most reliable, staying within 4°.
Where Deltona’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Deltona’s center.
- Snow: Sanford, FL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Sanford, FL, 7 miles from the city’s center point, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Deltona’s climate
What is the weather like in Deltona?
A typical July afternoon reaches 92°, a January night drops to 49°, and snow is almost unheard of. Milder January nights than 96% of U.S. towns; hotter July afternoons than 87% of U.S. towns.
How cold does it get in Deltona in winter?
January nights average 49°. About 3 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 53°.
How much snow does Deltona get?
About 0.0 inches in a normal winter at Sanford, FL, so most winters see none.
How hot does it get in Deltona?
July, with a typical high of 92° and a low of 73°. About 109 days a year reach 90° (Sanford, FL).
When is the first and last frost in Deltona?
There is no reliable frost date: a 32° night comes in about 51% of winters at Sanford, FL, so most years bring a freeze but some pass without one.
What growing zone is Deltona in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 29°.
What is the best time of year to visit Deltona?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Deltona getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 63% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Deltona.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.