Key West Weather in January
Thinking of visiting Key West in January? Expect high temperatures reaching 24°C (75°F) during the day, dropping to 19°C (66°F) at night, with some rainfall likely.
Rainfall in Key West in January
Historically, the month has about 8 days of rain, averaging 44 mm (1.7 in) in total. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Key West in January
January is a excellent month in Key West, with 24°C (75°F) during the day and 19°C (66°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 19°C (66°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. Expect milder temperatures this month, yet the warmth is still pleasantly present.
Sunshine in Key West in January
There are approximately 250 hours of sunshine this month, resulting in mostly clear days.
Average water temperature in January
With water at 22°C (72°F), conditions are good for swimming and other water activities. You won't need a wetsuit and most people find it very comfortable.If you're a fan of comfortable temperatures and drier conditions, January is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Key West's climate page.
Key West Temperature in January
Min Temperature
19°C (66°F)
Max Temperature
24°C (75°F)
Water Temperature
22°C (72°F)
Chance of Rain
28%
Precipitation
44 mm (1.7 in)
Rainy days
8 days
Humidity
75%
Sunshine
250 hours
Percentage Sunshine
75%
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Key West typically stay consistent throughout January, with daily highs averaging around 24°C (75°F). Nights are pleasant, with lows typically ranging from 18°C (64°F) to 21°C (70°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Key West in January
Browse day-by-day weather records for Key West spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Key West historical weather extremes in January
The extremes listed below come from historical weather data collected in Key West from 1976 through 2025.
- The hottest January day on record in Key West reached 29°C (84°F) (January 10, 1993).
- On January 10, 2010, Key West saw its coldest January day with temperatures maxing out at 11°C (52°F).
- Key West registered its coldest January night on January 18, 1981, with temperatures dropping to 6°C (43°F).
Best Places in the United States of America in January
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in January →
perfect weather
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What to Wear in Key West in January
Pleasant temperatures in January mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 22°C (72°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Key West in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Key West's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Key West climate overview or explore weather in the United States of America.
