Climate and monthly weather forecastKey Largo, FL
Climate and monthly weather forecast
The climate of Key Largo
Key Largo, situated in Florida, USA, experience average tropical weather. The Köppen climate classification puts Key Largo in the Aw category, which suggests a predominately tropical wet and dry or savanna climate. The geographical position near the equator facilitates this warm climate.The weather shows remarkable stability throughout the year, with minor fluctuations in temperature. High temperatures range from 72.7°F (22.6°C) in the cooler months of January to a peak of 85.5°F (29.7°C) in August. Low temperatures exhibit a similar trend, escalating from January’s 66.9°F (19.4°C) to the zenith of 82.9°F (28.3°C) in August.
The city also receives ample rainfall, with the highest average precipitation observed in August 4.33" (110mm), and the least in December 0.91" (23mm). The relative humidity remains fairly constant throughout the year hovering around mid-70s percentages.
A noteworthy pattern is the high levels of sunshine that Key Largo enjoys despite the considerable rainfall. The city boasts around 10.5 hours of sunshine per day throughout the year, with maximum hours of sunshine occurring in August.
The best time to visit Key Largo
Factoring in both temperature and rainfall, March to June emerges as the ideal period to visit Key Largo. During these months, the average high temperature rises slowly from a pleasant 74.5°F (23.6°C) in March to a peak of 83.7°F (28.7°C) in June. Correspondingly, the rainfall also remains below the yearly average, with the lowest recorded in March at 0.59" (15mm). Furthermore, the city experiences around 10 hours of daily sunshine during this period, allowing tourists to fully exploit their outdoor activities.The worst time to visit Key Largo
The period from July to October is typically the least favorable time to visit Key Largo. These months see the highest concentrations of rainfall, peaking in August at 4.33" (110mm). Additionally, the temperatures in these months are the hottest of the year, with the average high peaking at 85.5°F (29.7°C) in August. The intense heat and heavy rainfall during this period limit the outdoor activities and sightseeing opportunities.Spring weather in Key Largo
Spring in Key Largo spans from March until May. During these months, the city experiences an average high temperature ranging from 74.5°F (23.6°C) in March to 80.6°F (27°C) in May. Correspondingly, the average low temperatures rise from 70.2°F (21.2°C) to 78.1°F (25.6°C).Rainfall during this period is relatively lower compared to the other seasons. March experiences the least average rainfall across the year at 0.59" (15mm), increasing to 2.64" (67mm) in May. With the city bathed in around 11 hours of daily sunshine, spring is an excellent season to enjoy the sunny beaches of Key Largo.
Summer weather in Key Largo
Summer spans from June until August in Key Largo. At this time, the city enters its wettest period, with the highest amount of rainfall seen in August at 4.33" (110mm). Despite this, the city enjoys around 10.5 hours of daily sunshine during these months.The highest temperatures of the year are also recorded during this season. The average high reaches its peak in August at 85.5°F (29.7°C), and the average low mimics this trend, peaking at 82.9°F (28.3°C) in the same month.
Autumn weather in Key Largo
Autumn, spanning from September until November, is characterized by a slight drop in temperatures but remains wet. The temperatures drop from an average high of 84.6°F (29.2°C) to 77.7°F (25.4°C) and an average low from 81.7°F (27.6°C) to 74.1°F (23.4°C).Despite the transition into the drier part of the year, rainfall remains relatively high, with 3.19" (81mm) in October. Strikingly, September experiences the highest number of rainy days at 22.9.
Winter weather in Key Largo
Key Largo’s winter season, from December until February, experiences the lowest temperatures of the year. The average high moves from 75.2°F (24°C) in December to 73.6°F (23.1°C) by February, while the average low ranges from 71.1°F (21.7°C) to 69.4°F (20.8°C) in the same period.Rainfall scales down significantly compared to the other seasons, with December showcasing the lowest rainfall of 0.91" (23mm). This reduction in rainfall, along with nearly 7 hours of daily sunshine, leads to an ideal climate for individuals seeking a winter getaway. Furthermore, the sea temperature remains relatively warm through these months, fostering aquatic activities.
Weather in January
With a gentle start to the year, Key Largo experiences mild and moderately rainy conditions in January. The transition from the chillier December to gradually warming temperatures signifies the onset of a pleasant time for outdoor activities. Weather in January »Weather in February
February, the last month of the winter in Key Largo, is a warm month, with an average temperature varying between 73.6°F (23.1°C) and 69.4°F (20.8°C). The initiation of February sees an average high-temperature of a moderately hot 73.6°F (23.1°C), showing minor variations from the previous month. Weather in February »Weather in March
March, the first month of the spring in Key Largo, is still a warm month, with an average temperature varying between 70.2°F (21.2°C) and 74.5°F (23.6°C). With the onset of March, the average high-temperature stands at a still moderately hot 74.5°F (23.6°C), closely aligned with February's 73.6°F (23.1°C). Weather in March »Weather in April
April marks the beginning of the amusement-laden season in Key Largo, bringing notable changes from March in terms of temperature and precipitation. With the increase in average temperatures, tourists start flocking in large numbers. Weather in April »Weather in May
Key Largo ushers in the onset of summer in May, with a conspicuous heat influence compared to April. The sunshine hours plateau, giving way to longer daylight hours, resulting in predominantly sunny days. In consonance with the season, the sea temperature rises, further promoting water-based activities. Weather in May »Weather in June
June represents the mid-summer season in Key Largo, showing an upward trend from May in humidity and rainfall. Although lesser sunshine hours are available, the length of the day remains almost constant. Sudden tropical rain showers are often complemented by intermittent sunny spells, painting incredible rainbow scenes across the island city. Weather in June »Weather in July
July is typically the warmest month in Key Largo, with temperatures soaring above those seen in June. With the significant increase in heat, the frequency and intensity of rain also heighten, providing occasional relief from the scorching sun. Weather in July »Weather in August
August brings about the height of the summer season, with warmer temperatures than July and extended daylight hours. Equilibrium between sun-soaked and rainy days provides a perfectly balanced tropical weather experience. Despite the intense sun, the sea temperature remains invitingly warm for all sorts of water sports. Weather in August »Weather in September
Key Largo moves towards fall in September, experiencing a slight dip in temperatures compared to August. However, the weather remains largely warm, keeping up the tropical vibes of the island city. Daylight hours start decreasing, yet the sea maintains its warmth, owing to the summer's residual heat. Weather in September »Weather in October
October brings noticeable changes in Key Largo's weather, with temperatures falling compared to September. The declining heat welcomes in a period of relief after the intense summer months. The duration of sunshine hours shortens as the days grow shorter, signifying the onset of autumn. Weather in October »Weather in November
November marks Key Largo's transition into the colder months, with a stark temperature difference compared to October. The city witnesses drastically decreased rainfall, signifying the end of the wet season. With fewer daylight hours available, the outdoor activities adjust according to the shortened days. Weather in November »Weather in December
December represents the coolest month in Key Largo, illustrating a stark contrast in temperature compared to November. Lesser rainfall and limited daylight hours define the city’s weather in this month. The island city lapses into a serene and less crowded phase, making it an ideal time for those seeking tranquility. Weather in December »Updated: Jun 21, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Key Largo's coldest month, January, registers temperatures that range from a high of 72.7°F (22.6°C) to a low of 66.9°F (19.4°C).
In Key Largo, during the entire year, the rain falls for 190.1 days and collects up to 27.05" (687mm) of precipitation.
With an average maximum UV index of 5, January is the month with the lowest UV index.
The months with the highest humidity are February, June and December, with an average relative humidity of 76%.
With an average ocean temperature of 73.9°F (23.3°C), February is the month with the coldest seawater.
The least humid month is March, with an average relative humidity of 73%.
March is the month with the least rainfall. Rain falls for 11.4 days and accumulates 0.59" (15mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The months with the highest UV index are April through October, with an average maximum UV index of 7.
The month with the longest days is June, with an average of 13h and 42min of daylight.
The month with the most sunshine in Key Largo is July, with an average of 11h of sunshine.
August is the month when Key Largo's temperatures reach their peak, with averages of 85.5°F (29.7°C) and lows of 82.9°F (28.3°C).
The month with the most rainfall is August, when the rain falls for 20.9 days and typically aggregates up to 4.33" (110mm) of precipitation.
The month with the warmest seawater is August, with an average ocean temperature of 86.5°F (30.3°C).
With an average of 10h and 36min of daylight, December has the shortest days of the year.
With an average of 6.4h of sunshine, December has the least sunshine of the year.
Average temperature
Key Largo, FL
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.7°F).
The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (66.9°F).
Average pressure
Key Largo, FL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.99"Hg
- Average pressure in July:
30.02"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.94"Hg - Average pressure in October:
29.94"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).
Average wind speed
Key Largo, FL
- Average wind speed in January:
12.9mph - Average wind speed in February:
12.4mph - Average wind speed in March:
12.8mph - Average wind speed in April:
12.4mph - Average wind speed in May:
11.6mph - Average wind speed in June:
9.4mph
- Average wind speed in July:
8.9mph - Average wind speed in August:
9.3mph - Average wind speed in September:
9.4mph - Average wind speed in October:
12.5mph - Average wind speed in November:
12.8mph - Average wind speed in December:
12.4mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity
Key Largo, FL
The months with the highest relative humidity are February, June and December (76%).
The month with the lowest relative humidity is March (73%).
Average rainfall
Key Largo, FL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.91" - Average rainfall in March:
0.59" - Average rainfall in April:
1.26" - Average rainfall in May:
2.64" - Average rainfall in June:
3.31"
- Average rainfall in July:
3.7" - Average rainfall in August:
4.33" - Average rainfall in September:
4.25" - Average rainfall in October:
3.19" - Average rainfall in November:
1.22" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (0.59").
Average rainfall days
Key Largo, FL
- Average rainfall days in January:
10.7 days - Average rainfall days in February:
9.7 days - Average rainfall days in March:
11.4 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
20.1 days
- Average rainfall days in July:
20.9 days - Average rainfall days in August:
20.9 days - Average rainfall days in September:
22.9 days - Average rainfall days in October:
18.2 days - Average rainfall days in November:
14.2 days - Average rainfall days in December:
12.5 days
The month with the highest number of rainy days is September (22.9 days).
The month with the least rainy days is February (9.7 days).
Average sea temperature
Key Largo, FL
The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).
Average daylight / Average sunshine
Key Largo, FL
- Average daylight in January:
10h and 48min - Average daylight in February:
11h and 18min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 48min - Average daylight in May:
13h and 24min - Average daylight in June:
13h and 42min
- Average daylight in July:
13h and 30min - Average daylight in August:
13h and 0min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 36min - Average daylight in November:
10h and 54min - Average daylight in December:
10h and 36min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in January:
6h and 42min - Average sunshine in February:
8h and 42min - Average sunshine in March:
8h and 42min - Average sunshine in April:
9h and 54min - Average sunshine in May:
10h and 36min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
10h and 12min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 30min - Average sunshine in December:
6h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days
Key Largo, FL
- Average sunshine days in January:
17.3 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
17.1 days - Average sunshine days in April:
14.1 days - Average sunshine days in May:
13 days - Average sunshine days in June:
8.1 days
- Average sunshine days in July:
8.4 days - Average sunshine days in August:
7.8 days - Average sunshine days in September:
5.2 days - Average sunshine days in October:
9.1 days - Average sunshine days in November:
11.9 days - Average sunshine days in December:
14.9 days
The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (5.2 days).
Average UV index
Key Largo, FL
The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover
Key Largo, FL
The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).
Average visibility
Key Largo, FL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
