July Weather in Key West, United States

Last updated: February 24, 2025

July in Key West offers a warm, tropical climate that beckons visitors to enjoy its vibrant beaches and lively atmosphere. With maximum temperatures reaching 30°C (87°F) and an average of 28°C (83°F), the weather is perfect for outdoor activities. However, expect some moisture in the air, with humidity averaging around 70%, adding to the island’s sultry charm. Rainfall is to be anticipated, with 103 mm (4.0 in) of precipitation spread over 15 days, enhancing the lush landscapes. Whether basking in the sun or exploring the local attractions, July in Key West is an enticing blend of heat and occasional refreshing showers.

July Temperature in Key West

In July, Key West basks in warm tropical temperatures, with daily minimums averaging 25°C (78°F), and the maximums reaching a pleasant 30°C (87°F). The average temperature hovers around 28°C (83°F), reflecting the steady climb in warmth that begins in the earlier summer months. Compared to June, when the temperatures make a slight leap, July maintains this tropical vibe, ensuring that visitors can enjoy outdoor activities under the sun. As the summer progresses, this consistency in warmth invites a plethora of water sports and beach excursions, making Key West a vibrant summer destination.

July Weather in Key West: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Key West, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec717374777982838482817774
Data source: Temperature data for Key West generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in Key West

In July, Key West experiences a notable increase in precipitation, with 103 mm (4.0 in) of rain falling over approximately 15 days. This marks a continuation of the wet season, following June's substantial 94 mm. The trend is clear: as summer progresses, the island faces heightened rainfall, setting the stage for the tropical downpours that characterize this time of year. Interestingly, July's precipitation slightly surpasses August's expected 100 mm and, while it still remains lower than the September peak of 172 mm, it illustrates the increasing atmospheric humidity and volatility typical of the season. This gradual uptick in rainfall not only nourishes the lush landscape but also propels Key West into the heart of its vibrant, albeit wet, summer climate.

July Precipitation Trends in Key West

The chart displays monthly precipitation patterns in Key West, with values for each month alongside July's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec27271840139941031001721338344
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

July Humidity in Key West

In Key West, the humidity trends reveal a fascinating rhythm throughout the year. July, with an average humidity of 70%, marks a slight rise from June's 69%, indicating the coming of the summer heat. This peak continues into August, reaching 72%, before the humidity begins its annual ascent toward the cooler months. Notably, the tail end of the year sees humidity levels climbing back up, peaking again in January and December at 81%. This journey through the months highlights the tropical character of Key West, where humidity is a constant companion, adding to the lush atmosphere and vibrant ecosystem of this beautiful destination.

July Average Humidity in Key West

This chart illustrates the average monthly humidity levels in Key West, with July's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how July's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%76%73%71%70%70%72%76%79%80%81%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Key West

In July, Key West experiences a UV Index of 12, placing it firmly in the extreme exposure category, with a burn time of just 10 minutes. This is consistent with the trend seen from March through June, where the UV levels were similarly intense, peaking at 13 in June. Such high UV readings remind visitors and locals alike to take precautionary measures to protect their skin. Following July, the UV Index remains at 12 for August before beginning to taper off slightly in September and October. As summer heats up, it’s crucial to stay informed and vigilant about UV exposure. For more details on daily UV levels and precautions, visit Key West UV Index.

Maximum UV Index Levels in Key West for July

The chart shows the monthly maximum UV Index (UVI) for Key West in July, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec79111212131212111086
Data source: Key West July UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

July Sunshine in Key West

In July, Key West basks in an impressive 351 hours of sunshine, making it one of the sunniest months of the year. As the summer reaches its zenith, the trend clearly showcases a series of bright days that outshine the earlier months, with only April and March coming close. This peak in sunlight not only enhances the island's vibrant atmosphere but also invites visitors to indulge in outdoor adventures, from snorkeling in crystal-clear waters to savoring sunsets at lively beaches. Following the sunny July, the hours slightly decline in August, yet the warmth and allure of Key West continue to captivate sun-seekers. Overall, the sunshine trend underscores Key West’s appeal as a summer getaway where sunshine reigns supreme.

Monthly Sunshine Duration in Key West: July Highlighted

The July sunshine duration represents the total number of hours Key West experiences direct sunlight during the month of July, excluding cloudy or obstructed periods. This chart compares the sunshine duration of July with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec228h286h333h340h335h323h351h340h320h305h286h288h
Data source: Key West July Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Key West During July

In Key West, July offers a 40% chance of sunny weather, showing a noticeable decline compared to the earlier summer months. This trend highlights a significant shift from the bright 72% likelihood of sunshine in March, as well as an even more pronounced drop from the sunnier spring months of April and May, which boast 64% and 58% respectively. Following July, the chances continue to dwindle into August and September, where the likelihood decreases to 28% and 36%. Overall, from the patterns observed, it appears that while July still retains decent sunlight, it signals the beginning of a more unpredictable weather phase in Key West as the summer progresses.

Percentage of Sunny Days in July in Key West

The chart illustrates the percentage of sunny days in Key West throughout the year, with July highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Key West experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec43%68%72%64%58%21%40%28%36%49%50%73%
Data source: Key West July chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Key West in July

In Key West, United States, the month of July enjoys a splendidly long daylight duration, maintaining 13 hours of sunlight—a peak that began in May and persists through the summer. This consistent brightness mirrors the earlier months from April to June, where the days gradually extended from 12 to 13 hours. As summer leans into late summer and into the fall, daylight starts to wane, with August following closely behind with a slight dip to 12 hours. The overall trend reveals a vibrant and sun-soaked summer, with daylight hours gradually decreasing as the year progresses, creating a rhythmic cycle that invites both relaxation and adventure in the sun-drenched paradise of Key West.

Average Daylight Hours in Key West for July

The chart illustrates the variation in daylight duration in Key West throughout the year, with July highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 47m11h 19m12h 1m12h 44m13h 20m13h 37m13h 27m12h 56m12h 15m11h 32m10h 55m10h 37m
Data source: Key West daylight hours, calculated by summing the hours between sunrise and sunset for each day.

July Winds in Key West

In July, Key West experiences its calmest winds of the year, with an average speed of just 4.7 m/s (11 mph). This drop marks a significant shift from the spring months when wind speeds hovered around 6.0 to 6.8 m/s (14 to 15 mph). As summer sets in, the prevailing breezes become gentler, creating a tranquil atmosphere perfect for leisurely activities and relaxation by the beach. This trend of reduced wind continues into August, where speeds slightly pick up to 5.6 m/s (13 mph), but the overall summer vibe remains serene. As the year progresses into the later months, wind speeds begin to rise again, especially in November, highlighting the cyclical nature of Key West's breezy climate. Such fluctuations not only embody the region's charm but also invite visitors to enjoy the warm, balmy days without the intrusion of strong winds.

Average July Wind Speed in Key West

The chart displays monthly wind speed patterns in Key West, with values for each month shown alongside July's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how July's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec5.66.16.86.06.15.84.7 m/s5.63.65.36.35.5
Data source: Key West July wind data, generated using information from the Copernicus Climate Change Service.

How July Weather in Key West Compares to Other Months

The weather in Key West changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of July'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.

When comparing the weather in July and January, it's clear that July brings a much warmer and more humid atmosphere. With average temperatures around 28°C (83°F) and highs reaching 30°C (87°F), July is characterized by significant heat and increased humidity at 70%. Additionally, this month experiences more precipitation, totaling 103 mm (4.0 in) over approximately 15 days. In contrast, January offers a more moderate climate, with average temperatures of 22°C (71°F) and highs of 26°C (79°F). This cooler month sees significantly less rainfall, averaging only 27 mm (1.1 in) across about 5 days, along with a higher humidity level of 81%. For more detailed insights on the winter weather, you can check Key West weather in January.

In comparing the weather between July and February, July tends to be significantly warmer and more humid. The minimum temperature in July is 25°C (78°F), with an average of 28°C (83°F) and maximums reaching up to 30°C (87°F). In contrast, February enjoys cooler temperatures, ranging from a minimum of 14°C (58°F) to an average of 23°C (74°F) and a maximum of 26°C (80°F). Additionally, July sees much higher rainfall, with 103 mm (4.0 in) over 15 days, while February has only 27 mm (1.1 in) over just 4 days, suggesting that February is drier overall. For more specifics on February's climate, you can check out Key West weather in February.

In comparing the weather between March and July, we see notable differences in temperature and precipitation. July tends to be significantly warmer, with average temperatures around 28°C (83°F) and maximums reaching 30°C (87°F), whereas March has milder temperatures, averaging 23°C (74°F) and peaking at 26°C (80°F). Additionally, July experiences much higher precipitation, with 103 mm (4.0 in) falling over 15 days, compared to just 18 mm (0.7 in) over 4 days in March. Humidity levels are slightly elevated in March at 76%, while July's humidity hovers around 70%. For more detailed weather information, you can check Key West weather in March.

In comparing the weather between July and April, we see notable differences in temperature and precipitation. July experiences warmer temperatures, with a minimum of 25°C (78°F) and an average of 28°C (83°F), peaking at 30°C (87°F). In contrast, April is slightly cooler, with minimum temperatures of 19°C (67°F) and an average of 25°C (77°F), topping out at 29°C (84°F). Additionally, July is significantly wetter, receiving 103 mm (4.0 in) of precipitation over 15 days, while April has only 40 mm (1.6 in) of rain across 7 days. Humidity levels are fairly comparable, with July at 70% and April slightly higher at 73%. For more detailed insights into April's weather, you can check Key West weather in April.

In comparing the weather between May and July, it is evident that both months feature warm temperatures, but July tends to be slightly hotter. In July, the minimum temperature averages around 25°C (78°F) while reaching an average maximum of 30°C (87°F). In contrast, May’s temperatures range from a minimum of 22°C (72°F) to a maximum of 29°C (84°F). Although July is generally hotter, it experiences slightly less precipitation, totaling 103 mm (4.0 in) over 15 days, compared to May's 139 mm (5.5 in) over 11 days. Both months exhibit high humidity levels, with July at 70% and May at 71%. For a more detailed overview of the climate, check out Key West weather in May.

In comparing the weather of July to June, both months exhibit similar temperature patterns, with averages hovering around 28°C (82°F) to 30°C (87°F). However, July tends to be slightly wetter, with precipitation reaching 103 mm (4.0 in) over 15 days, compared to June's 94 mm (3.7 in) across 14 days. The humidity levels are also slightly higher in July at 70%, compared to June's 69%. For further details, you can check out the Key West weather in June.

In comparing the weather between July and August, both months experience relatively warm temperatures, with July having an average of 28°C (83°F) and August slightly warmer at 29°C (84°F). The minimum temperatures remain consistent at 25°C (78°F), while the maximum does not exceed 30°C (87°F) in either month. Interestingly, precipitation levels are quite close, with July receiving 103 mm (4.0 in) and August slightly less at 100 mm (3.9 in), both months observing rain on 15 days. Humidity is also similar, with July at 70% and August increasing marginally to 72%. For further insights into August weather, you can visit Key West weather in August.

In comparing the weather of July and September, both months share similar temperature ranges, with minimums of 25°C (77°F) and averages around 28°C (83°F). However, September experiences slightly lower maximum temperatures of 30°C (86°F) compared to July's peak of 30°C (87°F). Notably, September sees increased precipitation, totaling 172 mm (6.8 in) over 17 days, which is significantly higher than July's 103 mm (4.0 in) over 15 days. The humidity also rises in September, averaging 76% compared to July's 70%. For more detailed insights on September conditions, you can check the Key West weather in September.

In comparing the weather between July and October, we see a notable shift in temperatures and precipitation. July features higher temperatures with a minimum of 25°C (78°F) and an average of 28°C (83°F), while October's minimum temperature drops slightly to 20°C (69°F) and maintains a comparable average of 27°C (81°F). However, October sees increased precipitation, with 133 mm (5.2 in) spread over 18 days, compared to July's 103 mm (4.0 in) across 15 days. Moreover, the humidity levels rise from 70% in July to 79% in October, making October feel a bit more humid. For a detailed look at what to expect, refer to Key West weather in October.

In July, the weather is warm and humid, with average temperatures ranging from a minimum of 25°C (78°F) to a maximum of 30°C (87°F) and a substantial average precipitation of 103 mm (4.0 in) over approximately 15 days. In contrast, November offers a more moderate climate, with temperatures varying from a minimum of 18°C (65°F) to a maximum of 28°C (83°F) and less rainfall, totaling 83 mm (3.3 in) across about 10 days. Notably, the humidity remains high in both months, reaching 70% in July and 80% in November, although the overall sensation of heat is generally more intense in the summer. For more detailed information about the weather in November, visit Key West weather in November.

In July, the weather is typically warm and humid, with average temperatures ranging from a minimum of 25°C (78°F) to a maximum of 30°C (87°F). This month sees considerable rainfall, averaging 103 mm (4.0 in) over about 15 days, contributing to a humidity level of 70%. In contrast, December offers a more temperate climate, with average temperatures between 15°C (59°F) and 27°C (80°F). Precipitation drops significantly to 44 mm (1.7 in) over just 5 days, and despite a slightly higher humidity of 81%, the overall conditions are much more comfortable. For a detailed look at what to expect, check out Key West weather in December.

Compare Key West's Climate with Cities Worldwide

Conclusion: What to Expect From July Weather in Key West

July in Key West brings a warm tropical embrace, with temperatures generally peaking at a maximum of 30°C (87°F) and maintaining a sultry average of 28°C (83°F). As the summertime heat intensifies, the humidity hovers around 70%, creating a quintessential beach atmosphere ideal for those seeking sun-soaked afternoons. However, be prepared for some scattered showers, as precipitation is common, occurring on about half the days of the month. This combination of warmth and occasional rain sets July apart from the drier months, offering a lush and vibrant landscape. For a deeper dive into what you can expect throughout the year, visit Key West Climate.