When to go · United States
When to go to Key West
When to go
What the averages say
On these averages, Key West has a mean high between 18°C and 32°C and under 150 mm of rain in July and October to May.
Of those months, it is also dry (under 50 mm of rain) and not humid in December to March.
- Wet months (150 mm of rain or more): June, August and September.
- Humid months (a high of 25°C or more with relative humidity of 70% or more): April to November.
- The warmest month is August (30°C) and the coolest January (23°C). The wettest is September (177 mm) and the driest March (26 mm); about 1,054 mm of rain falls in a year.
How these sentences are worded
Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.
The model's grid cell here is mostly sea, so the daily high and low sit closer together than they do on land: afternoons ashore are usually warmer, and nights cooler.
The year at a glance
- Mild to warm and dry
- Mild to warm, humid or showery
- Hot
- Cool
- Wet
- Cold
- JanMild–warm, dry
- FebMild–warm, dry
- MarMild–warm, dry
- AprMild–warm, mixed
- MayMild–warm, mixed
- JunWet
- JulMild–warm, mixed
- AugWet
- SeptWet
- OctMild–warm, mixed
- NovMild–warm, mixed
- DecMild–warm, dry
Month by month
Every month in Key West
| Month | High | Low | Rain | Humidity | Cloud | Sunlight (kWh/m²/day) | High in Dubai | What it is like |
|---|---|---|---|---|---|---|---|---|
| January | 23°C | 21°C | 33 mm | 78% | 51% | 3.9 | 23°C | Mild to warm and dry |
| February | 23°C | 22°C | 34 mm | 80% | 42% | 4.8 | 24°C | Mild to warm and dry |
| March | 24°C | 23°C | 26 mm | 77% | 39% | 5.9 | 27°C | Mild to warm and dry |
| April | 26°C | 24°C | 44 mm | 76% | 37% | 6.6 | 31°C | Mild to warm, humid or showery |
| May | 27°C | 26°C | 96 mm | 76% | 43% | 6.7 | 35°C | Mild to warm, humid or showery |
| June | 29°C | 28°C | 157 mm | 78% | 62% | 6.3 | 37°C | Wet |
| July | 30°C | 29°C | 127 mm | 75% | 59% | 6.4 | 39°C | Mild to warm, humid or showery |
| August | 30°C | 29°C | 156 mm | 75% | 58% | 6.1 | 39°C | Wet |
| September | 29°C | 29°C | 177 mm | 77% | 62% | 5.4 | 37°C | Wet |
| October | 28°C | 27°C | 116 mm | 77% | 53% | 4.8 | 34°C | Mild to warm, humid or showery |
| November | 26°C | 24°C | 49 mm | 76% | 47% | 4.1 | 29°C | Mild to warm, humid or showery |
| December | 24°C | 23°C | 39 mm | 79% | 49% | 3.6 | 25°C | Mild to warm and dry |
The Dubai column is Dubai's mean daily high, for comparison.
Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.
When to go nearby
When to go nearby
- Havana170 kmGood for going: October to April
- Miami210 kmGood for going: October to May
- Fort Lauderdale240 kmGood for going: October to May
- Tampa383 kmGood for going: October to May
- Orlando445 kmGood for going: October to May
- Nassau451 kmGood for going: July and October to May
- Camagüey530 kmGood for going: October to February
- George Town587 kmGood for going: November to September
Plan it
Plan a trip to Key West
Tell us when and who is travelling, and a person puts the flights, the stays and the rest into one quote.