Photo: Excel23 · CC BY-SA 4.0Callahan’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 92°, a January night drops to 42°, and snow is almost unheard of.
A year in Callahan at a glance
Each month’s typical high and low, and what it brings.
What stands out about Callahan’s climate
Compared with towns across the U.S., with Callahan’s place in Florida beside it.
What a year in Callahan feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 288 frost-free days a year
In half of years the last 32° night comes by February 25 and the first by December 7. Frost and day counts come from NOAA’s station at Jacksonville, FL, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Callahan’s center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 24°. 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 51 inches of rain a year
June is the wettest month and November the driest. Rain falls on about 114 days a year. Snow is rare: about 0.0" in a normal year at Jacksonville, FL, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Callahan
30% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from January.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Jacksonville, FL.
Living with Callahan’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
288 frost-free days in zone 9a. The last frost comes by Feb 25 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 7.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, October, November and December.
Parks & trails →Of the yearly building losses FEMA expects in Callahan from natural hazards, river flooding is the largest share (57%); heat waves, cold waves, winter storms and ice storms together are 5%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Callahan and similar climates
TownRatings has no climate map of the towns around Callahan yet.
Climates most like Callahan’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 |
|---|---|---|---|---|
| Callahan, FL | 42° | 92° | 51" | 0.0" |
| Willis, TX | 41° | 94° | 50" | 0.0" |
| Bainbridge, GA | 39° | 92° | 52" | 0.0" |
| North Charleston, SC | 38° | 92° | 50" | 0.3" |
| Headland, AL | 39° | 91° | 56" | 0.1" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Callahan averaged 1.4° warmer than the 1900s. The biggest change is in December (+2.3°).
A bigger shift than in 54% 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.
How Callahan compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Callahan’s place among Florida’s.
Callahan weather by month
Highs, lows and precipitation from NOAA’s grid at Callahan’s center; snow, wet days and snow on the ground from Jacksonville, FL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 65° | 42° | 3.4" | 0.0" | 8 | 0 | 48° – 60° |
| February | 69° | 45° | 3.0" | 0.0" | 8 | 0 | 49° – 65° |
| March | 75° | 50° | 3.4" | 0.0" | 8 | 0 | 56° – 70° |
| April | 80° | 55° | 3.1" | 0.0" | 6 | 0 | 63° – 72° |
| May | 86° | 63° | 3.1" | 0.0" | 7 | 0 | 71° – 78° |
| June | 90° | 70° | 6.9" | 0.0" | 14 | 0 | 77° – 84° |
| July | 92° | 72° | 6.1" | 0.0" | 14 | 0 | 80° – 84° |
| August | 91° | 72° | 6.9" | 0.0" | 15 | 0 | 79° – 84° |
| September | 88° | 69° | 6.3" | 0.0" | 12 | 0 | 76° – 82° |
| October | 81° | 60° | 4.0" | 0.0" | 8 | 0 | 67° – 75° |
| November | 73° | 50° | 2.0" | 0.0" | 7 | 0 | 57° – 68° |
| December | 67° | 45° | 2.7" | 0.0" | 8 | 0 | 46° – 66° |
| Year | 80° | 58° | 50.9" | 0.0" | 114 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 46° to 66°. July is the most reliable, staying within 4°.
Where Callahan’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 Callahan’s center.
- Snow: Jacksonville, FL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Jacksonville, FL, 10 miles from the town’s center, 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 Callahan’s climate
What is the weather like in Callahan?
A typical July afternoon reaches 92°, a January night drops to 42°, and snow is almost unheard of. Milder January nights than 91% of U.S. towns; hotter July afternoons than 89% of U.S. towns.
How cold does it get in Callahan in winter?
January nights average 42°. About 14 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 48°.
How much snow does Callahan get?
About 0.0 inches in a normal winter at Jacksonville, FL, so most winters see none.
How hot does it get in Callahan?
July, with a typical high of 92° and a low of 72°. About 80 days a year reach 90° (Jacksonville, FL).
When is the first and last frost in Callahan?
In half of years the last spring frost (32°) comes by February 25 and the first fall frost by December 7, about 288 frost-free days, at Jacksonville, FL.
What growing zone is Callahan in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 24°.
What is the best time of year to visit Callahan?
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 Callahan getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 54% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Callahan.
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.