Dry Tortugas, Florida climate: Climate normals at a NOAA weather station
Dry Tortugas's normal year runs from 65°F January nights to 91°F August afternoons, with 37.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 25.4°C, January lows of 18°C, August highs of 33°C, 956 mm of precipitation a year.
- NOAA stationDry Tortugas
- Station IDUSC00082418
- Location24.63°N 82.87°W
- Elevation3 ft (1 m)
On October 23, the normal high in Dry Tortugas is 84°F and the normal low 75°F, and the chance of measurable rain or snow is 25%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Dry Tortugas.
- Jan 74° 65°
- Feb 76° 66°
- Mar 79° 68°
- Apr 83° 71°
- May 86° 75°
- Jun 89° 77°
- Jul 91° 78°
- Aug 91° 79°
- Sep 89° 78°
- Oct 85° 76°
- Nov 79° 71°
- Dec 76° 67°
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 Dry Tortugas each month?
August is the warmest month, with normal highs of 91°F; January the coldest, with normal lows of 65°F. The most precipitation falls in September (7.18 in), the least in February (1.69 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 74°F | 65°F | 69.3°F | 2.35 | 7 | <1 | <1 | 10 h 50 min |
| February | 76°F | 66°F | 70.5°F | 1.69 | 6 | <1 | <1 | 11 h 20 min |
| March | 79°F | 68°F | 73.1°F | 2.07 | 4 | <1 | <1 | 12 h |
| April | 83°F | 71°F | 76.9°F | 2.60 | 4 | 1 | <1 | 12 h 40 min |
| May | 86°F | 75°F | 80.3°F | 2.02 | 5 | 6 | <1 | 13 h 20 min |
| June | 89°F | 77°F | 83.3°F | 4.26 | 7 | 16 | <1 | 13 h 40 min |
| July | 91°F | 78°F | 84.4°F | 2.19 | 9 | 24 | <1 | 13 h 30 min |
| August | 91°F | 79°F | 85.2°F | 4.31 | 10 | 26 | <1 | 13 h |
| September | 89°F | 78°F | 83.4°F | 7.18 | 12 | 15 | <1 | 12 h 20 min |
| October | 85°F | 76°F | 80.4°F | 4.72 | 10 | 2 | <1 | 11 h 40 min |
| November | 79°F | 71°F | 74.9°F | 1.88 | 4 | <1 | <1 | 11 h |
| December | 76°F | 67°F | 71.2°F | 2.36 | 6 | <1 | <1 | 10 h 40 min |
| Year (annual) | 83°F | 72°F | 77.7°F | 37.63 | 84 | 91 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 23°C | 18°C | 20.7°C | 60 mm |
| February | 24°C | 19°C | 21.4°C | 43 mm |
| March | 26°C | 20°C | 22.8°C | 53 mm |
| April | 28°C | 22°C | 24.9°C | 66 mm |
| May | 30°C | 24°C | 26.8°C | 51 mm |
| June | 32°C | 25°C | 28.5°C | 108 mm |
| July | 33°C | 26°C | 29.1°C | 56 mm |
| August | 33°C | 26°C | 29.6°C | 109 mm |
| September | 32°C | 26°C | 28.6°C | 182 mm |
| October | 29°C | 24°C | 26.9°C | 120 mm |
| November | 26°C | 21°C | 23.8°C | 48 mm |
| December | 24°C | 19°C | 21.8°C | 60 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00082418; 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 Dry Tortugas?
Normal highs sit between 65°F and 85°F in January, February, March, April, October, November and December. Of those, March 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 USC00082418.
How hot and how cold does it get at Dry Tortugas?
In a normal year in Dry Tortugas, 91 days a year reach 90°F, nights almost never fall to freezing and 84 days bring measurable precipitation.
- Days at 90°F or more
- 91a 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
- 84a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00082418.
How sunny is it at Dry Tortugas?
Over a year 86% of the sunlight that would reach the ground under clear skies gets through the clouds at Dry Tortugas, 5.4 kWh per square metre a day. April is the sunniest month (91%) and January the cloudiest (80%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 80% | 3.8 |
| February | 85% | 4.7 |
| March | 89% | 5.9 |
| April | 91% | 6.6 |
| May | 89% | 6.8 |
| June | 84% | 6.4 |
| July | 87% | 6.5 |
| August | 86% | 6.2 |
| September | 83% | 5.4 |
| October | 84% | 4.8 |
| November | 85% | 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 Dry Tortugas record?
A normal year at Dry Tortugas brings 46 heating degree days, 99% fewer than the median U.S. place (5,373), and 4,710 cooling degree days, 5.2 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 10,140 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 18 | 151 |
| February | 13 | 167 |
| March | 5 | 257 |
| April | 0 | 357 |
| May | 0 | 473 |
| June | 0 | 549 |
| July | 0 | 603 |
| August | 0 | 626 |
| September | 0 | 552 |
| October | 0 | 477 |
| November | 1 | 299 |
| December | 9 | 199 |
| Year (annual) | 46 | 4,710 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00082418. 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.
Have recent years at Dry Tortugas been warmer than normal?
2025 averaged 78.5°F, 0.8°F above the 1991-2020 normal of 77.7°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 80.4°F | +2.7°F | 26.13 |
| 2024 | 78.8°F | +1.1°F | 52.93 |
| 2025 | 78.5°F | +0.8°F | 35.87 |
Source: observed years: ACIS, station USC00082418. A year counts only with all twelve months complete.
How does Dry Tortugas's climate compare?
Dry Tortugas is warmer than 103 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 77.7°F is warmer than 100%.
In the Köppen classification computed from these normals, Dry Tortugas 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 Dry Tortugas's climate
What is the coldest month at Dry Tortugas?
January, with a normal high of 74°F and a normal low of 65°F. The warmest is August (91°F by day, 79°F at night).
What is the rainiest month at Dry Tortugas?
September, with 7.18 in of precipitation in a normal year; the driest is February with 1.69 in.
Nearby and next
- Florida climateThe statewide normals and every place in the state
- Key W Weather Office, FL68 miles from this station, 77.3°F a year
- Key West, FL71 miles from this station, 78.9°F a year
- Bahia Honda State Park, FL100 miles from this station, 77.6°F a year
- Marathon, FL114 miles from this station, 78.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made