Key West weather in January
January in Key West: warm, dry, with clean air — an excellent time to visit.
#6 of 12 months in Key West · #135 of 604 destinations to visit in January · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Key West climate normals — January
| Daytime high | 23°C / 73°F | 🌤 warm |
|---|---|---|
| Nighttime low | 21°C / 69°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 25 mm / 1 in | ☀️ dry |
| Rainy days | 5 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 10.8 h | |
| Wind | 29 km/h / 18 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Key West in January — FAQ
- Is January a good time to visit Key West?
- January in Key West: warm, dry, with clean air — an excellent time to visit. It ranks #6 of 12 months for Key West on SeasonMap's comfort score (82/100).
- What is the weather like in Key West in January?
- In January, Key West averages a daily high of 23°C and a low of 20.8°C, with about 24.7 mm of rain over roughly 5.4 rainy days.
- What is the air quality in Key West in January?
- Key West has a mean US Air Quality Index of about 45 in January.