Weather in Key West

Planning a trip or just curious about the weather in Key West? In this section, you will find the most up-to-date information: current weather conditions, detailed forecasts, and visual charts to help you stay informed of all changes.

Key West boasts a delightful tropical climate that attracts tourists all year round. The region is characterized by warm, and often hot, temperatures throughout the year, without sharp drops. The average annual temperature is comfortable for holidays, making it an ideal place for those seeking sun and warmth.

Two main periods can be distinguished during the year. From November to April, the weather is usually very pleasant, with plenty of sunny days, minimal rainfall, and an average temperature between 20.7°C and 25.0°C. This time is considered drier. The period from May to October is characterized by higher temperatures, reaching an average of 28.4°C in August, and an increase in the number of days with precipitation. Although it rains more often during these months, the total amount of rainfall remains moderate, usually meaning short tropical downpours quickly followed by sunshine.

Overall, the weather in Key West is noted for its stability and predictability. Even in the "coolest" months, the temperature rarely drops below comfortable levels, and the summer heat is tempered by the ocean breeze. This allows you to plan a trip for almost any time of the year, depending on your temperature and humidity preferences.

In Key West, year-round warmth awaits you, typical of a tropical climate. The temperature patterns here are remarkably stable, with no sharp fluctuations. The hottest month is usually August, when the average temperature reaches 28.4°C, and maximum daily values can rise to 29.4°C. It is slightly cooler, but still very warm, in July with an average temperature of 28.3°C. The "coolest" month is considered to be January; however, even then, the average temperature holds at a comfortable 20.7°C, with minimum night-time temperatures around 19.6°C.

The summer months, from June to September, in Key West are a period of true tropical heat. Average temperatures during this time range from 27.7°C in June to a peak of 28.4°C in August. Daytime highs consistently hover around 28-29°C, and nights remain very warm, with temperatures rarely falling below 26-27°C. Although the amount of rainfall in millimetres is not always high, the increase in the number of rainy days during the summer period (especially in July and August, up to 19 days) contributes to a feeling of higher humidity, creating an atmosphere typical of the tropics.

Winter in Key West, if it can be called that, is very mild and pleasant. From December to February, average temperatures vary from 20.7°C in January to 22.8°C in December. Even in the coldest month, January, daytime temperatures usually do not drop below 21.9°C, and night-time temperatures stay around 19.6°C. One of the features of the Key West climate is the insignificant difference between day and night temperatures throughout the year. It is usually only 1.5-2.5°C, which means no sharp cooling after sunset and comfortable warm evenings all year round.

An interesting pattern of rainfall distribution is observed in Key West throughout the year. Although the total amount of rain falling in millimetres is small, two main seasons can be distinguished by the frequency of precipitation. Snow does not fall in Key West due to year-round high temperatures, so all precipitation comes in the form of rain. In general, even during the "wettest" periods, it is more about frequent but not very heavy showers.

The wetter season, in terms of rain frequency, falls in the period from May to October. During this time, the number of days with precipitation increases. For example, July and August are the record holders for the number of rainy days — an average of 19 days in each of these months. At the same time, the maximum monthly rainfall, about 6 mm, is recorded in May and September. The nature of precipitation in these months is likely frequent but light or short-term tropical rains, which are quickly replaced by sun.

From November to April, a drier period begins in Key West. During these months, the amount of precipitation is minimal and amounts to only about 1 mm per month (January, February, March, April, November, December). The driest month in terms of rain frequency is February, when precipitation is observed on average for only 2 days. In the other months of this "dry" season, the number of days with rain ranges from 4 (in March and December) to 8 (in November).

When packing for Key West, remember that a warm tropical climate awaits you all year round. The basis of your wardrobe should be light, breathable clothing made from natural fabrics such as cotton or linen. Be sure to bring swimwear, high SPF sunscreen, quality sunglasses, and headwear – a wide-brimmed hat or a cap. For walking along the charming streets of the city and along the coast, comfortable shoes will be indispensable: sandals, flip-flops, or light trainers.

Despite the fact that the general temperature in Key West is always comfortable, some seasonal nuances should be taken into account. From May to October, the number of days with precipitation increases, although the rains themselves are usually light and short-lived. During this period, a light raincoat or a compact umbrella will come in handy. Although the temperature even in the "cool" months (from December to February) rarely drops below 20°C, a light jumper, cardigan, or thin jacket may be needed for evening walks or if you are sensitive to small temperature changes, especially considering the ocean breeze.

In general, the principle of layering clothing is perfect for Key West. This will allow you to easily adapt to changing conditions, whether moving from the hot sun into an air-conditioned room or during a sudden short shower. Do not forget insect repellent, especially if you plan to spend a lot of time outdoors in the evening. And, of course, leave some space in your suitcase for souvenirs from this slice of paradise in the United States!