Last updated: February 24, 2025
In January, Key West, United States, offers a delightful getaway with average temperatures hovering around 22°C (71°F). Visitors can expect maximum highs reaching 26°C (79°F) while nighttime lows can dip to a comfortable 12°C (55°F). This month experiences a modest average precipitation total of 27 mm (1.1 in), spread over five days, making it a relatively dry period. With an average humidity of 81%, the weather remains warm and inviting, perfect for exploring the island’s stunning landscapes and vibrant culture.
In Key West, January ushers in mild winter temperatures, with minimums dipping to a comfortable 12°C (55°F), while the average settles around a pleasant 22°C (71°F). By day, temperatures can reach a delightful maximum of 26°C (79°F), making it an ideal escape from colder northern climates. As the month progresses, a noticeable warming trend emerges, hinting at the approaching spring. This gradual increase sets the stage for February, when temperatures rise slightly, with minimums at 14°C (58°F) and a consistent average of 23°C (74°F). The stability in temperatures throughout the winter months showcases the region's charm, encouraging both locals and visitors alike to indulge in outdoor activities under the sun.
In Key West, January brings a relatively dry start to the year, with just 27 mm (1.1 in) of precipitation spread over approximately 5 days. This trend of low rainfall continues into February, maintaining the same precipitation level, before dipping to 18 mm (0.7 in) in March. As the months progress, the rainfall steadily increases, peaking in September with a significant 172 mm (6.8 in), showcasing the region's susceptibility to seasonal weather patterns. While winter months remain mild in terms of rain, the summer months witness a marked uptick, with rainfall frequency also rising sharply. By the autumn, the frequency of rain continues to escalate, indicating a pattern of transition from the drier months to the wetter, more tumultuous periods of the year.
In January, Key West experiences a notable humidity level of 81%, setting the stage for a year characterized by warmth and moisture. As the months roll into February, humidity dips slightly to 79%, followed by a steady decline to 76% in March and then 73% in April. This downward trend continues until May, where it reaches 71%, before settling into the summer months. Interestingly, humidity begins to rise again in July and August, peaking at 72%. By September, it climbs to 76%, and returns to the 80% range in November and December, mirroring January's humidity levels. Overall, Key West’s humidity demonstrates a seasonal ebb and flow, creating a tropical backdrop that is both inviting and refreshing for visitors year-round.
In January, Key West experiences a UV Index of 7, categorized as high, which means that sun protection is essential, especially within a burn time of just 25 minutes. However, as the month progresses towards February, a notable shift occurs with the UV Index climbing to 9, indicating a very high exposure risk and a reduced burn time of only 15 minutes. This upward trend continues into the spring months, peaking in March and April where the UV Index reaches a striking 11 to 12, marking a continuous extreme risk, necessitating diligent sun protection measures with a minimal burn time of only 10 minutes. As summer approaches, the pattern maintains a high UV Index, remaining at 12 or 13 through mid-year, before tapering off slightly in the fall. As the seasons change, it’s crucial for residents and visitors alike to remain vigilant about sun safety year-round. For a detailed overview, visit Key West UV Index.
UV Risk Categories
January in Key West shines brightly with 228 hours of sunshine, heralding the beginning of the year in this tropical paradise. As winter gives way to spring, the sun's presence steadily increases, with February basking in 286 hours and March peaking at 333 hours. By April, sunshine reaches its zenith at 340 hours, maintaining a splendid glow into May and June with just a slight dip during the summer months. Remarkably, July capitalizes on the long days, boasting 351 hours, before the autumn months gently bring the count down to a cozy 305 hours in October. This captivating trend underscores Key West's allure as a year-round destination for sun-seekers, especially as the days grow longer and warmer toward mid-year. The gradual ebb of sunlight in late fall and winter serves as a reminder of the changing seasons while still offering plenty of bright moments.
In Key West, January brings a substantial chance of sunny days, with a 43% likelihood that you'll bask in the warm sun. This sets the stage for a gradual increase in sunshine as the winter months progress. As February rolls in, the chance of sunny weather significantly rises to 68%, paving the way for a trend that peaks in March at an impressive 72%. While the chances of clear skies enjoy some fluctuation through the spring—hovering between 58% and 64%—they take a dip in the summer months, plummeting to a mere 21% in June. This seasonal shift emphasizes January's potential for sunshine, offering an alluring glimpse of the sun-soaked days that await as winter transitions to spring.
In Key West, January heralds the start of the year with 10 hours of daylight, laying the foundation for a gradual increase as winter transitions into spring. By February, daylight extends to 11 hours, and as March arrives, the sun graces the island for a full 12 hours—a rich increase that continues into April. This trend peaks in the summer months, with June, July, and August enjoying 13 hours of daylight, offering ample time to soak up the sun. As fall approaches, daylight begins to wane, dropping back to 12 hours in September and October, before returning to 10 hours in November and December. This cycle highlights the vibrant seasonal rhythm of Key West, where longer days encourage lively outdoor activities and picturesque sunsets, making it a coveted destination year-round.
In January, Key West experiences a gentle breeze, with an average wind speed of 5.6 m/s (13 mph), setting a leisurely tone for the month. This marks the beginning of a gradual uptick in wind speeds, as February brings a slight increase to 6.1 m/s (14 mph), and by March, the winds become more pronounced, reaching 6.8 m/s (15 mph). April and May see a return to stable conditions around 6.0 m/s (14 mph), while the summer months, particularly July, bring a notable dip to 4.7 m/s (11 mph). As the year progresses, the winds will continue to fluctuate, with September showing the calmest conditions at just 3.6 m/s (8 mph), before picking up again in the fall. This pattern illustrates the dynamic nature of Key West's winds, where January's mild breezes pave the way for the lively gusts of spring.
The weather in Key West changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Key West and find detailed weather information for every month.
January and February exhibit similar weather patterns, with both months experiencing mild temperatures and low precipitation. In January, the minimum temperature hovers around 12°C (55°F), while February sees a slight increase to a minimum of 14°C (58°F). The average temperature remains comparable, with January averaging 22°C (71°F) and February slightly warmer at 23°C (74°F). Both months have a maximum temperature of 26°C (79°F), alongside identical precipitation levels of 27 mm (1.1 in) over roughly four to five days. Humidity is slightly higher in January at 81%, compared to February's 79%, making February a touch more comfortable. For more detailed insights, check out Key West weather in February.
In January, the weather in Key West features a mild temperature range with a minimum of 12°C (55°F) and an average of 22°C (71°F), reaching a maximum of 26°C (79°F). The month experiences about 27 mm (1.1 in) of precipitation over approximately 5 days, coupled with a high humidity level of 81%.
By March, the climate becomes slightly warmer, with minimum temperatures rising to 17°C (62°F) and an average of 23°C (74°F), while the maximum remains steady at 26°C (80°F). Precipitation decreases to 18 mm (0.7 in), and it rains about 4 days, leading to a drop in humidity to 76%. Overall, March offers a more temperate and drier experience compared to January. For a closer look at the specifics, visit Key West weather in March.
January and April in Key West showcase a notable contrast in weather conditions. January experiences milder temperatures with a minimum of 12°C (55°F) and an average of 22°C (71°F), while April enjoys warmer conditions, with a minimum temperature of 19°C (67°F) and an average of 25°C (77°F). Precipitation is a factor in both months; however, April sees a slight increase, receiving about 40 mm (1.6 in) over 7 days compared to January's 27 mm (1.1 in) over 5 days. Additionally, the humidity in January peaks at 81%, whereas April's humidity is more comfortable at 73%. For more details on what to expect, check out Key West weather in April.
In January, the weather is quite mild, with temperatures ranging from a minimum of 12°C (55°F) to a maximum of 26°C (79°F) and an average of 22°C (71°F). The month experiences relatively low precipitation, totaling 27 mm (1.1 in) over about five days, and humidity levels are high at 81%. In contrast, May is considerably warmer, with minimum temperatures starting at 22°C (72°F) and peaking at 29°C (84°F), averaging around 26°C (79°F). However, this month sees a significant increase in precipitation, reaching 139 mm (5.5 in) over eleven days, and humidity drops to a more comfortable 71%. To learn more about the weather specifics, visit Key West weather in May.
In January, the weather features a mild temperature range with a minimum of 12°C (55°F) and an average of 22°C (71°F), reaching a maximum of 26°C (79°F). The month experiences relatively low precipitation at 27 mm (1.1 in) over about 5 days, coupled with high humidity levels at 81%. In contrast, June brings warmer temperatures, with a minimum of 24°C (76°F) and an average of 28°C (82°F), peaking at 30°C (87°F). However, June is significantly wetter, recording 94 mm (3.7 in) of precipitation over 14 days, and the humidity drops to 69%. For more details, visit Key West weather in June.
January in Key West offers milder temperatures, with a minimum of 12°C (55°F) and an average of 22°C (71°F), making it a comfortable time of year for outdoor activities. In contrast, July brings warmer weather, with a minimum temperature of 25°C (78°F) and an average of 28°C (83°F), creating a more tropical climate. While January experiences only 27 mm (1.1 in) of precipitation over 5 days, July is considerably wetter, receiving 103 mm (4.0 in) of rain spread across 15 days. Additionally, January’s humidity is higher at 81%, whereas July’s humidity is relatively lower at 70%. For those interested in detailed weather patterns, you can check the Key West weather in July.
In January, the weather is pleasantly mild, with temperatures ranging from a minimum of 12°C (55°F) to an average of 22°C (71°F) and a maximum of 26°C (79°F). There is relatively low precipitation, totaling 27 mm (1.1 in) over just five days, and humidity levels are quite high at 81%. In contrast, August brings much warmer conditions, with minimum temperatures of 25°C (78°F) and an average of 29°C (84°F), peaking at 30°C (87°F). However, the month is wetter, experiencing 100 mm (3.9 in) of precipitation over 15 days, and the humidity is somewhat lower at 72%. For more detailed insights on the August weather, visit Key West weather in August.
In January, Key West experiences milder temperatures with a minimum of 12°C (55°F) and an average of 22°C (71°F), peaking at 26°C (79°F). The month sees relatively low precipitation, totaling 27 mm (1.1 in) over just 5 days, coupled with a high humidity level of 81%. In contrast, September brings warmer weather with a minimum temperature of 25°C (77°F) and an average reaching 28°C (83°F), peaking at 30°C (86°F). This month is considerably wetter, with 172 mm (6.8 in) of rain over 17 days and slightly lower humidity at 76%. For more detailed insights on weather patterns, you can visit Key West weather in September.
In January, Key West experiences milder temperatures, with a minimum of 12°C (55°F) and an average of 22°C (71°F), reaching a maximum of 26°C (79°F). The month sees relatively low precipitation, totaling 27 mm (1.1 in) over about 5 days, while humidity is moderately high at 81%. In contrast, October offers warmer temperatures, starting from a minimum of 20°C (69°F) and averaging 27°C (81°F), peaking at 29°C (85°F). However, it also brings significantly higher precipitation at 133 mm (5.2 in) over 18 days, with humidity slightly lower at 79%. For more details, visit Key West weather in October.
When comparing the weather between January and November, January tends to be slightly cooler with an average temperature of 22°C (71°F), while November shows a warmer average of 25°C (77°F). In January, the minimum temperature dips to 12°C (55°F), which is notably lower than November's minimum of 18°C (65°F). Precipitation is also more prevalent in November, with 83 mm (3.3 in) of rain over 10 days, compared to January's 27 mm (1.1 in) over just 5 days. Humidity levels remain similar in both months, hovering around 81% in January and 80% in November. For more details on the weather specifics for November, you can visit Key West weather in November.
January's weather is characterized by slightly cooler temperatures compared to December, with minimums of 12°C (55°F) versus December's 15°C (59°F). While both months share an average temperature of around 22-23°C (71-74°F), January has a maximum temperature of 26°C (79°F), slightly lower than December's 27°C (80°F). Precipitation increases in January to 27 mm (1.1 in) over 5 days, whereas December experiences a higher rainfall of 44 mm (1.7 in) over the same number of days, yet both months maintain consistent humidity levels at 81%. For more detailed information, check out Key West weather in December.
January in Key West offers a refreshing escape from the tropical heat, with cooler temperatures and lower humidity compared to the sweltering summer months. Visitors can expect mild days with average highs around 22°C (71°F), creating an ideal environment for outdoor adventures and leisurely strolls. Though it may be one of the driest months, a few light rain showers could occur, contributing to the overall tranquility of the season. This month’s inviting climate sets the stage for a vibrant experience, drawing travelers looking to enjoy the unique charm of the island without the bustling crowds of peak tourist season. To further explore the weather patterns that define this beautiful destination, check out Key West Climate.