Jones Family Historic District · Photo: National Park Service · Public domainFew U.S. towns have milder winter nights than North Key Largo
Expect July afternoons of about 89°. By precipitation alone, it ranks wetter than 93% of U.S. towns. Decade by decade the climate has edged up, 2.0° above 1901–2000. From November to April, highs of 76–82° make it easy to spend the day outdoors.
A year in North Key Largo at a glance
Each month’s typical high and low, and what it brings.
What stands out about North Key Largo’s climate
Compared with towns across the U.S., with North Key Largo’s place in Florida beside it.
What a year in North Key Largo feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at John Pennekamp Sp, FL, 5 miles from the town’s center, at about the same height.
The 2023 USDA map puts North Key Largo’s center in zone 11a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 43°. Plant labels use the zone; frost dates tell you when to plant.
90° days by month
Average days at 90° or more
About 55 inches of rain a year
September is the wettest month and December the driest. Rain falls on about 96 days a year. Snow is rare: about 0.0" in a normal year at Tavernier, FL, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in North Key Largo
2% 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 John Pennekamp Sp, FL.
Living with North Key Largo’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 11a. Frost almost never comes, 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, November and December. 7.6 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in North Key Largo from natural hazards, hurricanes are the largest share (67%). Normals are averages; the hazards page covers the extremes.
Natural hazards →North Key Largo and similar climates
TownRatings has no climate map of the towns around North Key Largo yet.
Climates most like North Key Largo’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 |
|---|---|---|---|---|
| North Key Largo, FL | 62° | 89° | 55" | 0.0" |
| Heeia, HI | 66° | 84° | 51" | 0.0" |
| Galveston, TX | 48° | 89° | 52" | 0.1" |
| Galliano, LA | 46° | 90° | 63" | 0.0" |
| Gulf Shores, AL | 44° | 90° | 62" | 0.0" |
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 North Key Largo averaged 2.0° warmer than the 1900s. The biggest change is in December (+2.9°).
A bigger shift than in 90% 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 North Key Largo compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with North Key Largo’s place among Florida’s.
North Key Largo weather by month
Highs, lows and precipitation from NOAA’s grid at North Key Largo’s center; snow, wet days and snow on the ground from Tavernier, FL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 76° | 62° | 2.1" | 0.0" | 6 | 0 | 63° – 74° |
| February | 77° | 64° | 2.1" | 0.0" | 4 | 0 | 64° – 76° |
| March | 79° | 66° | 2.2" | 0.0" | 5 | 0 | 66° – 78° |
| April | 82° | 70° | 2.9" | 0.0" | 5 | 0 | 73° – 81° |
| May | 85° | 74° | 4.7" | 0.0" | 6 | 0 | 76° – 82° |
| June | 88° | 77° | 8.0" | 0.0" | 11 | 0 | 80° – 85° |
| July | 89° | 78° | 5.5" | 0.0" | 9 | 0 | 82° – 85° |
| August | 89° | 78° | 7.1" | 0.0" | 12 | 0 | 82° – 85° |
| September | 88° | 77° | 8.7" | 0.0" | 13 | 0 | 81° – 84° |
| October | 85° | 75° | 6.5" | 0.0" | 12 | 0 | 78° – 83° |
| November | 81° | 69° | 2.9" | 0.0" | 6 | 0 | 71° – 80° |
| December | 78° | 65° | 2.0" | 0.0" | 6 | 0 | 62° – 79° |
| Year | 83° | 71° | 54.7" | 0.0" | 96 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 62° to 79°. July is the most reliable, staying within 3°.
Where North Key Largo’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 North Key Largo’s center.
- Snow: Tavernier, FL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: John Pennekamp Sp, FL, 5 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 North Key Largo’s climate
What is the weather like in North Key Largo?
A typical July afternoon reaches 89°, a January night drops to 62°, and snow is almost unheard of. Milder January nights than all but 79 U.S. towns; hotter July afternoons than 73% of U.S. towns.
How cold does it get in North Key Largo in winter?
January nights average 62°. A night at 32° or below comes in only some winters (0.0 a year on average). In the coldest January of the last 30 years the month averaged 63°.
How much snow does North Key Largo get?
About 0.0 inches in a normal winter at Tavernier, FL, so most winters see none.
How hot does it get in North Key Largo?
July, with a typical high of 89° and a low of 78°. About 47 days a year reach 90° (John Pennekamp Sp, FL).
When is the first and last frost in North Key Largo?
Most years have no frost at all: a 32° night comes in about 0% of winters at John Pennekamp Sp, FL, usually in December or January.
What growing zone is North Key Largo in?
Zone 11a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 43°.
What is the best time of year to visit North Key Largo?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is North Key Largo getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 90% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in North Key Largo.
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.