Islamorada, Florida climate: Climate normals at a NOAA weather station
Islamorada's normal year runs from 65°F January nights to 89°F July afternoons, with 38.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 25.5°C, January lows of 18°C, July highs of 32°C, 982 mm of precipitation a year.
- NOAA stationIslamorada
- Station IDUSC00084320
- Location24.92°N 80.64°W
- Elevation6 ft (2 m)
On October 23, the normal high in Islamorada is 84°F and the normal low 75°F, and the chance of measurable rain or snow is 26%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Islamorada.
- Jan 75° 65°
- Feb 77° 67°
- Mar 78° 69°
- Apr 81° 72°
- May 84° 76°
- Jun 87° 78°
- Jul 89° 80°
- Aug 89° 79°
- Sep 88° 79°
- Oct 85° 76°
- Nov 80° 71°
- Dec 78° 68°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Islamorada each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 65°F. The most precipitation falls in September (8.09 in), the least in January (0.97 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 75°F | 65°F | 69.8°F | 0.97 | 5 | <1 | <1 | 10 h 40 min |
| February | 77°F | 67°F | 71.7°F | 1.32 | 4 | <1 | <1 | 11 h 20 min |
| March | 78°F | 69°F | 73.5°F | 1.32 | 4 | <1 | <1 | 12 h |
| April | 81°F | 72°F | 76.7°F | 2.76 | 4 | <1 | <1 | 12 h 40 min |
| May | 84°F | 76°F | 79.9°F | 2.35 | 6 | <1 | <1 | 13 h 20 min |
| June | 87°F | 78°F | 82.4°F | 5.08 | 10 | 3 | <1 | 13 h 40 min |
| July | 89°F | 80°F | 84.1°F | 3.85 | 10 | 8 | <1 | 13 h 30 min |
| August | 89°F | 79°F | 84.1°F | 5.61 | 10 | 12 | <1 | 13 h |
| September | 88°F | 79°F | 83.5°F | 8.09 | 12 | 5 | <1 | 12 h 20 min |
| October | 85°F | 76°F | 80.7°F | 4.51 | 9 | 2 | <1 | 11 h 40 min |
| November | 80°F | 71°F | 75.7°F | 1.59 | 6 | <1 | <1 | 11 h |
| December | 78°F | 68°F | 72.7°F | 1.23 | 7 | <1 | <1 | 10 h 40 min |
| Year (annual) | 83°F | 73°F | 77.9°F | 38.68 | 87 | 30 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 24°C | 18°C | 21.0°C | 25 mm |
| February | 25°C | 19°C | 22.1°C | 34 mm |
| March | 26°C | 21°C | 23.1°C | 34 mm |
| April | 27°C | 22°C | 24.8°C | 70 mm |
| May | 29°C | 24°C | 26.6°C | 60 mm |
| June | 30°C | 26°C | 28.0°C | 129 mm |
| July | 32°C | 26°C | 28.9°C | 98 mm |
| August | 32°C | 26°C | 28.9°C | 142 mm |
| September | 31°C | 26°C | 28.6°C | 205 mm |
| October | 30°C | 25°C | 27.1°C | 115 mm |
| November | 27°C | 22°C | 24.3°C | 40 mm |
| December | 25°C | 20°C | 22.6°C | 31 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00084320; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Islamorada?
Normal highs sit between 65°F and 85°F in January, February, March, April, May, November and December. Of those, April has the fewest days with rain (4).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00084320.
How hot and how cold does it get at Islamorada?
In a normal year in Islamorada, 30 days a year reach 90°F, nights almost never fall to freezing and 87 days bring measurable precipitation.
- Days at 90°F or more
- 30a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- fewer than 1a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 87a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00084320.
How sunny is it at Islamorada?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds at Islamorada, 5.4 kWh per square metre a day. April is the sunniest month (90%) and January the cloudiest (82%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 82% | 3.9 |
| February | 85% | 4.8 |
| March | 88% | 5.8 |
| April | 90% | 6.6 |
| May | 87% | 6.6 |
| June | 83% | 6.3 |
| July | 86% | 6.4 |
| August | 86% | 6.2 |
| September | 83% | 5.5 |
| October | 83% | 4.8 |
| November | 83% | 4.1 |
| December | 82% | 3.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Islamorada record?
A normal year at Islamorada brings 57 heating degree days, 99% fewer than the median U.S. place (5,373), and 4,780 cooling degree days, 5.3 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 10,199 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 29 | 180 |
| February | 11 | 198 |
| March | 5 | 269 |
| April | 0 | 351 |
| May | 0 | 462 |
| June | 0 | 524 |
| July | 0 | 592 |
| August | 0 | 592 |
| September | 0 | 554 |
| October | 0 | 485 |
| November | 1 | 323 |
| December | 11 | 251 |
| Year (annual) | 57 | 4,780 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00084320. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Islamorada's climate compare?
Islamorada is warmer than 104 of the 106 places with their own NOAA record in Florida, and wetter than 0. Across the 7,247 U.S. stations with normals, its annual mean of 77.9°F is warmer than 100%.
In the Köppen classification computed from these normals, Islamorada is Aw: tropical savanna. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Islamorada's climate
What is the coldest month at Islamorada?
January, with a normal high of 75°F and a normal low of 65°F. The warmest is July (89°F by day, 80°F at night).
Does it snow at Islamorada?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Islamorada?
September, with 8.09 in of precipitation in a normal year; the driest is January with 0.97 in.
What plant hardiness zone is Islamorada in?
The USDA's 2023 map puts Islamorada in zone 11b in ZIP code 33036, the nearest ZIP area.
Nearby and next
- Florida climateThe statewide normals and every place in the state
- Tavernier, FL9 miles from this station, 77.8°F a year
- Duck Key, FL20 miles from this station, 77.5°F a year
- Flamingo Ranger Station, FL24 miles from this station, 76.1°F a year
- Curry Hammock State Park, FL25 miles from this station, 77.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made