Dry Tortugas, FL Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Dry Tortugas's primary NOAA station, DRY TORTUGAS.
The climate verdict for Dry Tortugas
Warm-season cooling demand defines Dry Tortugas, Florida, running at more than twice its heating total. The NOAA normal records an annual average of 78°F. August is the warmest month at 85°F and January the coldest at 69°F.
- 78°F
- yearly average temperature, NOAA normal
- 37.6"
- precipitation, annual total
Dry Tortugas: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00082418 · Dry Tortugas, FL 78°F mean · 37.6" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-UNK · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-HOT 78°F
- RANK-WARM #6,792
- PHOTO-FINISH ≈ Duck Key
- PRCP-MID 37.6"
- SWING-NARROW 16°F
- COMF-UNK Comfort n/a
- LOAD-COOL 4,710 CDD
- STN-1 USC00082418
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Duck Key, FL ( -0.2 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every FL station list.
- Dry Tortugas (this station) 78°F
- Hot Honolulu, HI 78°F
- Near Duck Key, FL 78°F
- Near Islamorada, FL 78°F
- Cold Miami, FL 77°F
Dry Tortugas sits in Florida, the #1 hottest U.S. state at 72.6°F statewide annual average - see all 50 hottest states ranked by NOAA normals
Climate Living Index · Dry Tortugas
Dry Tortugas: 79/100 · grade B
Dry Tortugas publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Dry Tortugas, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 37.6 in · 2.6 from 35 in | 90/100 · A |
| Normal heat + freeze calendar | 74 calendar days | 84/100 · B |
| Annual temperature balance | 77.7°F · 10.2° from 67.5°F | 67/100 · C |
Dry Tortugas · 2026-08-04 · NOAA NCEI Climate Normals · method .
Dry Tortugas stays in the tropical Köppen band: Aw
Year-round heat with a pronounced dry season: tropical savanna (Aw). Class Aw is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: tropical, specifically tropical savanna.
- Köppen code
- Aw
- Group
- Tropical
- Warmest month
- 85.2°F
- Coldest month
- 69.3°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · cooling-led station
Where Dry Tortugas sits across the climate record
Three NOAA fields for Dry Tortugas's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 1% warmest
- Among 6,861 stations, Dry Tortugas sits in the warmer third of annual means.
- Annual precipitation
- 53rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 98%
- Warmest-to-coldest month gap for Dry Tortugas is compact versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 74°F (23°C) | 65°F (18°C) | 69°F (21°C) | 2.4" | 0.0 | 0.0 |
| February | 76°F (24°C) | 66°F (19°C) | 71°F (21°C) | 1.7" | 0.0 | 0.1 |
| March | 79°F (26°C) | 68°F (20°C) | 73°F (23°C) | 2.1" | 0.0 | 0.2 |
| April | 83°F (28°C) | 71°F (22°C) | 77°F (25°C) | 2.6" | 0.0 | 1.1 |
| May | 86°F (30°C) | 75°F (24°C) | 80°F (27°C) | 2.0" | 0.0 | 6.3 |
| June | 89°F (32°C) | 77°F (25°C) | 83°F (29°C) | 4.3" | 0.0 | 16.4 |
| July | 91°F (33°C) | 78°F (26°C) | 84°F (29°C) | 2.2" | 0.0 | 24.0 |
| August | 91°F (33°C) | 79°F (26°C) | 85°F (30°C) | 4.3" | 0.0 | 25.5 |
| September | 89°F (32°C) | 78°F (26°C) | 83°F (29°C) | 7.2" | 0.0 | 14.6 |
| October | 85°F (29°C) | 76°F (24°C) | 80°F (27°C) | 4.7" | 0.0 | 2.3 |
| November | 79°F (26°C) | 71°F (21°C) | 75°F (24°C) | 1.9" | 0.0 | 0.0 |
| December | 76°F (24°C) | 67°F (19°C) | 71°F (22°C) | 2.4" | 0.0 | 0.0 |
The year, day by day
The year in Dry Tortugas runs from a mild 65°F around January 15 to 92°F at the peak near August 4, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 24 through September 5, covering 74 dates. The broader mild season, normal highs of 70°F or more, runs January 1 to December 31.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 65°F around January 15.
Where the wet dates fall
The likeliest wet date is September 13, when 41% of years recorded at least a hundredth of an inch. The driest is April 19 at 13%. Summed across the calendar, that is about 84 wet dates a year.
The widest day
July 15 carries the biggest normal gap between afternoon and dawn, 13°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Dry Tortugas.
Where Dry Tortugas Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 13°F.
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 74 days a year, more than four out of five ranked stations record.
Dry Tortugas earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
6.9 days with precipitation
5.7 days with precipitation
4.1 days with precipitation
4.2 days with precipitation
4.5 days with precipitation
7.4 days with precipitation
8.7 days with precipitation
10.4 days with precipitation
11.9 days with precipitation
9.8 days with precipitation
4.3 days with precipitation
6.1 days with precipitation
Dry Tortugas spreads its precipitation across the year
Neither half of the year dominates here: June through August take 29% of the annual total and December through February 17%, with neither reaching the 35% that would mark a distinct wet season. Dry Tortugas has no dry season to plan around, though it does carry an unusually narrow 15.9°F seasonal spread.
The gap between the wettest and driest month still matters: September averages 7.2" and February 1.7". The three wettest months together take 43% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Dry Tortugas, it arrives in quantity
37.6" of precipitation falls across only about 84 wet days here, averaging 0.45 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 84 a year, 23% of all days
- Average depth per wet day
- 0.45 inches
- Most wet days
- September, about 12
- Fewest wet days
- March, about 4
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
46
Higher = more heating needed
Cooling Degree Days
4,710
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside FL closest to Dry Tortugas on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (78°F here).
- Kahului, HI 77°F · 0.6°F off
- Lihue, HI 76°F · 1.4°F off
- Brownsville, TX 76°F · 1.5°F off
- Needles, CA 76°F · 1.5°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (37.6" here), excluding temperature-peer places.
- Avon, IL 37.6" · 0.0" off
- Kenton, OH 37.6" · 0.0" off
- Minonk, IL 37.6" · 0.0" off
- Norman, OK 37.6" · 0.0" off
Data-derived climate profile
How Dry Tortugas's climate pattern fits together
cooling led · moderate · low swing
Warm-season load persists through a relatively even calendar in Dry Tortugas. Cooling totals 4,710 degree days, more than double the 46 heating measure, and the 15.9°F seasonal range is compact rather than sharply divided.
Dry Tortugas's 37.6 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
Temperature varies within a narrow 15.9°F band across the normal year. August and January mark the typical warm and cold ends of the calendar. The annual average is 78°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
A frost-free growing-season length is not available for Dry Tortugas. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
These labels group NOAA 1991-2020 normals from Dry Tortugas's primary station, so the summer figures are a thirty-year average rather than a ceiling: individual years have run hotter and will again. For Dry Tortugas that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Dry Tortugas's climate
How much rain does Dry Tortugas get? ▼
How many days above 90°F does Dry Tortugas get? ▼
How much energy does heating and cooling require in Dry Tortugas? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Dry Tortugas's primary station: DRY TORTUGAS (USC00082418). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Dry Tortugas; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Dry Tortugas comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.