North Key Largo, FL climate
North Key Largo has warm winters and warm summers, with plenty of rain. A typical July afternoon reaches 89°, a January night drops to 62°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in North Key Largo feels like
Winter
Spring
Summer
Fall
North Key Largo weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 76° | 62° | 2.1" | 0 | 6 | 0 | 63° – 74° |
| February | 77° | 64° | 2.1" | 0 | 4 | 0 | 64° – 76° |
| March | 79° | 66° | 2.2" | 0 | 5 | 0 | 66° – 78° |
| April | 82° | 70° | 2.9" | 0 | 5 | 0 | 73° – 81° |
| May | 85° | 74° | 4.7" | 0 | 6 | 0 | 76° – 82° |
| June | 88° | 77° | 8.0" | 0 | 11 | 0 | 80° – 85° |
| July | 89° | 78° | 5.5" | 0 | 9 | 0 | 82° – 85° |
| August | 89° | 78° | 7.1" | 0 | 12 | 0 | 82° – 85° |
| September | 88° | 77° | 8.7" | 0 | 13 | 0 | 81° – 84° |
| October | 85° | 75° | 6.5" | 0 | 12 | 0 | 78° – 83° |
| November | 81° | 69° | 2.9" | 0 | 6 | 0 | 71° – 80° |
| December | 78° | 65° | 2.0" | 0 | 6 | 0 | 62° – 79° |
| Year | 83° | 71° | 54.7" | 0.0" | 96 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in North Key Largo
North Key Largo gets 55 inches of rain and melted snow a year. September is the wettest month and December the driest. Rain or snow falls on about 96 days a year.
A year-round growing season
Heating and cooling a home in North Key Largo
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In North Key Largo, 2% of that work is heating and 98% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How North Key Largo compares
Compared with every U.S. town and city on TownTapestry, each counted once.
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°). The shift is larger than in 94% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at North Key Largo’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 62° to 79°. July is the most reliable, staying within 3°.
Common questions about North Key Largo’s climate
What is the coldest month in North Key Largo?
January, with a typical high of 76° and a low of 62°.
What is the hottest month in North Key Largo?
August, with a typical high of 89° and a low of 78°. About 47 days a year reach 90°.
How much snow does North Key Largo get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in North Key Largo?
Frost is uncommon. Only 0% of years see a night at 32° or below.
What is the rainiest month in North Key Largo?
September, with 8.7 inches of rain and melted snow. The year totals 55 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for North Key Largo itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Tavernier, FL (21 mi, snow) and John Pennekamp Sp, FL (5 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.