July weather forecast and climate
Key West, FL US

• Average high temperature in July: 31.8°C

The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (23.5°C).

• Average low temperature in July: 26.6°C

The month with the highest average low temperature is July (26.6°C).
The coldest month (with the lowest average low temperature) is January (17.9°C).

• Average humidity in July: 72.2%

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 July: 104mm

The wettest month (with the highest rainfall) is September (166mm).
The driest month (with the lowest rainfall) is March (40mm).

• Average rainfall days in July: 11.7 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 July: 29.7°C

The best month for swimming (with the highest average sea temperature) is August (30.5°C).
Coldest months (with the lowest average sea temperature) are January and February (21.8°C).

• Average daylight in July: 13.5h

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 July: 10.5h

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 July: 11

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).