Key Largo (FL) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Key Largo.
Climate overview of Key Largo
Temperatures in Key Largo, Florida, United States of America, shift moderately through the seasons. The warmest month is August at 32°C (90°F), and the coolest is January at 24°C (75°F).
The city receives considerable rainfall, with around 1102 mm (43 in) annually. September is the wettest month. May is the sunniest month, averaging 11.4 hours of sunshine per day.
Key Largo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Key Largo - and find the best time to visit.
Monthly Temperature in Key Largo
The climate in Key Largo experiences moderate temperature changes, with mild shifts between seasons. Typically, average maximum daytime temperatures range from a very warm 32°C (90°F) in August to a comfortable 24°C (75°F) in the coolest month, January.
Nights vary from 27°C (81°F) in August to around 17°C (63°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Key Largo
Key Largo has a notably wet climate with abundant precipitation, recording 1102 mm (43 in) of rainfall per year. The climate in Key Largo shows significant variation throughout the year. Expect heavy rainfall in September, the wettest month, with an average of 191 mm (7.5 in) of precipitation over 22 rainy days.
In contrast, the driest month March offers drier and sunnier days, with around 37 mm (1.5 in) of rainfall over 8 rainy days. For more details, please visit our Key Largo Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Key Largo
Key Largo offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between May (11.4 hours daily) and November (7.7 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Key Largo by Month
The relative humidity is high throughout the year in Key Largo.
The city experiences its highest humidity in January, reaching 77%. In April, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Key Largo
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, May, November and December
- Warmest weather: June, July, August and September
- Most sunshine: April, May and July
- Fewer rainy days: January, February, March, April and November
- Wettest months: June, July, August, September and October, when rainfall is highest.
Frequently asked questions about the climate in Key Largo
What is the best time to visit Key Largo?
January, February, March, April, May, November and December typically offer the most optimal weather in Key Largo. In contrast, September tends to have less optimal conditions.
What temperatures can I expect in Key Largo?
Daytime highs range from 24°C (75°F) in January to 32°C (90°F) in August. Nighttime lows range from 17°C (63°F) to 27°C (81°F).
How much rain does Key Largo get?
Annual rainfall is around 1102 mm (43 in). September is the wettest month with 191 mm (7.5 in), while March is the driest with 37 mm (1.5 in).
How sunny is Key Largo?
Key Largo receives around 3,412 hours of sunshine per year. May is the sunniest month with 341 hours, while November is the cloudiest with just 231 hours. Overall, Key Largo enjoys abundant sunshine.
Key Largo 3-Day Forecast
Key Largo (FL) 3-Day Forecast
Key Largo on the map
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