Key W, 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 Key W's primary NOAA station, KEY W WFO.
The climate verdict for Key W
Warm-season cooling demand defines Key W, Florida, running at more than twice its heating total. The NOAA normal records an annual average of 77°F. August is the warmest month at 84°F and January the coldest at 69°F.
- 77°F
- yearly average temperature, NOAA normal
- 46.4"
- yearly precipitation total
Key W: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00084571 · Key W, FL 77°F mean · 46.4" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-UNK · LOAD-COOL · STN-1 · BOOK-FULL
- TEMP-HOT 77°F
- RANK-WARM #6,792
- PHOTO-FINISH ≈ Miami Wso City
- PRCP-MID 46.4"
- SWING-NARROW 15°F
- COMF-UNK Comfort n/a
- LOAD-COOL 4,574 CDD
- STN-1 USC00084571
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Miami Wso City, FL (+ 0.1 °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.
- Hot Bahia Honda Sta…, FL 78°F
- Near Duck Key, FL 78°F
- Near Waikiki, HI 78°F
- Key W (this station) 77°F
- Near Miami Wso City, FL 77°F
Key W 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 · Key W
Key W: 79/100 · grade B
Key W publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Key W, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Annual temperature balance | 77.3°F · 9.8° from 67.5°F | 69/100 · C |
| Precipitation balance | 46.4 in · 11.4 from 35 in | 60/100 · C |
Key W · 2026-08-04 · NOAA NCEI Climate Normals · method .
Key W 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
- 84.1°F
- Coldest month
- 68.8°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 Key W sits across the climate record
Three NOAA fields for Key W'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, Key W sits in the warmer third of annual means.
- Annual precipitation
- Top 28% wettest
- Key W's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 98%
- Warmest-to-coldest month gap for Key W 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 | 75°F (24°C) | 63°F (17°C) | 69°F (20°C) | 2.0" | 0.0 | 0.0 |
| February | 77°F (25°C) | 64°F (18°C) | 70°F (21°C) | 2.0" | 0.0 | 0.0 |
| March | 79°F (26°C) | 67°F (19°C) | 73°F (23°C) | 1.4" | 0.0 | 0.0 |
| April | 83°F (28°C) | 71°F (22°C) | 77°F (25°C) | 2.2" | 0.0 | 0.0 |
| May | 86°F (30°C) | 74°F (23°C) | 80°F (27°C) | 3.7" | 0.0 | 0.9 |
| June | 88°F (31°C) | 77°F (25°C) | 82°F (28°C) | 4.8" | 0.0 | 6.9 |
| July | 90°F (32°C) | 78°F (25°C) | 84°F (29°C) | 4.5" | 0.0 | 18.6 |
| August | 90°F (32°C) | 79°F (26°C) | 84°F (29°C) | 6.1" | 0.0 | 19.2 |
| September | 88°F (31°C) | 77°F (25°C) | 83°F (28°C) | 8.2" | 0.0 | 7.2 |
| October | 85°F (30°C) | 75°F (24°C) | 80°F (27°C) | 6.0" | 0.0 | 1.0 |
| November | 81°F (27°C) | 70°F (21°C) | 75°F (24°C) | 3.3" | 0.0 | 0.2 |
| December | 77°F (25°C) | 66°F (19°C) | 72°F (22°C) | 2.2" | 0.0 | 0.0 |
The year, day by day
The calendar barely moves in Key W: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 62°F near January 20 and 90°F near July 12.
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 62°F around January 20.
Where the wet dates fall
The likeliest wet date is September 9, when 55% of years recorded at least a hundredth of an inch. The driest is April 2 at 16%. Summed across the calendar, that is about 112 wet dates a year.
The widest day
February 11 carries the biggest normal gap between afternoon and dawn, 12°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Key W.
Where Key W Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 12°F.
Key W earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
8.0 days with precipitation
5.5 days with precipitation
5.5 days with precipitation
4.8 days with precipitation
8.3 days with precipitation
10.4 days with precipitation
12.8 days with precipitation
14.0 days with precipitation
16.3 days with precipitation
12.1 days with precipitation
7.0 days with precipitation
7.1 days with precipitation
Key W spreads its precipitation across the year
Neither half of the year dominates here: June through August take 33% of the annual total and December through February 13%, with neither reaching the 35% that would mark a distinct wet season. Key W has no dry season to plan around, though it does carry an unusually narrow 15.3°F seasonal spread.
The gap between the wettest and driest month still matters: September averages 8.2" and March 1.4". The three wettest months together take 44% 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 Key W, it arrives in quantity
46.4" of precipitation falls across only about 112 wet days here, averaging 0.42 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 112 a year, 31% of all days
- Average depth per wet day
- 0.42 inches
- Most wet days
- September, about 16
- Fewest wet days
- April, about 5
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
56
Higher = more heating needed
Cooling Degree Days
4,574
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside FL closest to Key W 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 (77°F here).
- Kahului, HI 77°F · 0.2°F off
- Lihue, HI 76°F · 1.0°F off
- Brownsville, TX 76°F · 1.1°F off
- Needles, CA 76°F · 1.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (46.4" here), excluding temperature-peer places.
- Monett, MO 46.4" · 0.0" off
- Cashtown, PA 46.4" · 0.0" off
- Molalla, OR 46.4" · 0.0" off
- Russellville, AR 46.4" · 0.0" off
Data-derived climate profile
How Key W's climate pattern fits together
cooling led · wet · low swing
Warm-season load persists through a relatively even calendar in Key W. Cooling totals 4,574 degree days, more than double the 56 heating measure, and the 15.3°F seasonal range is compact rather than sharply divided.
Warm-season demand is paired with a wet annual normal: 46.4 inches of precipitation at Key W. Snowfall is not added to the interpretation because its annual value is missing. The month-by-month bars distinguish a concentrated wet season from moisture spread across the calendar.
Key W's 15.3°F seasonal spread is compact even though precipitation is abundant. August and January mark the typical warm and cold ends of the calendar. The annual average is 77°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
A frost-free growing-season length is not available for Key W. 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 Key W'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 Key W that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Key W's climate
How much rain does Key W get? ▼
How many days above 90°F does Key W get? ▼
How much energy does heating and cooling require in Key W? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Key W's primary station: KEY W WFO (USC00084571). 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 Key W; 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 Key W 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.