October weather forecast and climate
Key West, FL

A beach pier in Key West, Florida, with palm trees in the background
A beach pier in Key West, Florida, with palm trees in the background
October is prone to thunderstorms and hurricanes that make their way from the Atlantic Ocean. The temperatures drop down to an average of 76°F (24.4°C) to 85°F (29.4°C), but it is rainy with 12 days of rain during the month. The daily sunshine is 8 hours, and it is mostly sunny when the rain is absent.
A traveler with interest in history is bound to find the Harry Truman Little White House to be one of the better places in Key West in October.
Average temperature in October - Key West, FL
  • Average high temperature in October: 84.5°F

The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is January (74.3°F).

  • Average low temperature in October: 76°F

The month with the highest average low temperature is July (79.8°F).
The coldest month (with the lowest average low temperature) is January (64.2°F).

Average humidity in October - Key West, FL
  • Average humidity in October: 75.1%

The month with the highest relative humidity is December (76.2%).
The month with the lowest relative humidity is April (70.1%).

Average rainfall in October - Key West, FL
  • Average rainfall in October: 4.5"

The wettest month (with the highest rainfall) is September (6.5").
The driest month (with the lowest rainfall) is March (1.6").

Average rainfall days in October - Key West, FL
  • Average rainfall days in October: 11.3 days

The month with the highest number of rainy days is September (16.2 days).
The month with the lowest number of rainy days is April (4.5 days).

Average sea temperature in October - Key West, FL
  • Average sea temperature in October: 82.9°F

The best month for swimming (with the highest average sea temperature) is August (86.9°F).
Coldest months (with the lowest average sea temperature) are January and February (71.2°F).

Average daylight in October / Average sunshine in October - Key West, FL
  • Average daylight in October: 11.6h

The month with the longest days is June (Average daylight: 13.6h).
The month with shortest days is December (Average daylight: 10.6h).

  • Average sunshine in October: 8.2h

The month with most sunshine is May (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 7.6h).

Average UV index in October - Key West, FL
  • Average UV index in October: 9

Months with the highest UV index are April, May, June, July and August (UV index 11).
Months with the lowest UV index are January and December (UV index 6).

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