- Explore latest special offers & online deals from TUI
- Free child places & £0 deposits with direct debit available
- Book summer & winter sun holidays in 2026/2027
Key Largo weather by month
Check out Key Largo weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.
Temperature in Key Largo (°C)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max temperature (daytime) | 24 |
25 |
27 |
28 |
30 |
31 |
32 |
32 |
32 |
30 |
27 |
25 |
| Min temperature (night-time) | 14 |
14 |
16 |
18 |
21 |
22 |
23 |
23 |
23 |
21 |
18 |
15 |
| Heat & Humidity | 0 |
0 |
L |
M |
H |
H |
VH |
VH |
VH |
H |
M |
L |
| Sea temperature | 24 |
23 |
24 |
25 |
27 |
29 |
29 |
30 |
29 |
28 |
26 |
25 |
Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
Sunshine & UV index in Key Largo
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily hours of sunshine | ||||||||||||
| Daily hours of daylight | 11 |
11 |
12 |
13 |
13 |
14 |
14 |
13 |
12 |
12 |
11 |
11 |
| UV Index (Maximum) | 6 |
8 |
10 |
11 |
11 |
11 |
11 |
11 |
10 |
8 |
6 |
5 |
Rainfall in Key Largo
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of days with some rain | 7 |
6 |
6 |
5 |
10 |
15 |
15 |
17 |
17 |
13 |
9 |
6 |
| Average monthly rainfall (mm) | 51 |
49 |
57 |
62 |
168 |
253 |
150 |
166 |
213 |
179 |
55 |
36 |
More about Key Largo
Key Largo by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Florida
The climate guide for Florida (Key Largo) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
What's the climate like in Key Largo?
Key Largo has a hot tropical climate with a winter dry season.
Key Largo weather in January
Expect daytime maximum temperatures of 24°C in Key Largo, Florida in January based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 51 mm of rainfall in the month.
- 24°C max day temperature
24 - 7 hours of sunshine per day
- 7 days with some rainfall
7 - 14°C min night temperature
14 - 11 hours of daylight per day
11 - No heat & humidity
0 - 51 mm of monthly rainfall
51 - 6 (High) UV index
6 - 24°C sea temperature
24
Key Largo weather in February
Expect daytime maximum temperatures of 25°C in Key Largo, Florida in February based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 49 mm of rainfall in the month.
- 25°C max day temperature
25 - 8 hours of sunshine per day
- 6 days with some rainfall
6 - 14°C min night temperature
14 - 11 hours of daylight per day
11 - No heat & humidity
0 - 49 mm of monthly rainfall
49 - 8 (Very High) UV index
8 - 23°C sea temperature
23
Key Largo weather in March
Expect daytime maximum temperatures of 27°C in Key Largo, Florida in March based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 57 mm of rainfall in the month.
- 27°C max day temperature
27 - 9 hours of sunshine per day
- 6 days with some rainfall
6 - 16°C min night temperature
16 - 12 hours of daylight per day
12 - Low heat & humidity
L - 57 mm of monthly rainfall
57 - 10 (Very High) UV index
10 - 24°C sea temperature
24
Key Largo weather in April
Expect daytime maximum temperatures of 28°C in Key Largo, Florida in April based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 62 mm of rainfall in the month.
- 28°C max day temperature
28 - 10 hours of sunshine per day
- 5 days with some rainfall
5 - 18°C min night temperature
18 - 13 hours of daylight per day
13 - Moderate heat & humidity
M - 62 mm of monthly rainfall
62 - 11 (Extreme) UV index
11 - 25°C sea temperature
25
Key Largo weather in May
Expect daytime maximum temperatures of 30°C in Key Largo, Florida in May and high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 168 mm of rainfall in the month.
- 30°C max day temperature
30 - 10 hours of sunshine per day
- 10 days with some rainfall
10 - 21°C min night temperature
21 - 13 hours of daylight per day
13 - High heat & humidity
H - 168 mm of monthly rainfall
168 - 11 (Extreme) UV index
11 - 27°C sea temperature
27
Key Largo weather in June
Expect daytime maximum temperatures of 31°C in Key Largo, Florida in June and high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with 15 days with some rainfall and typically 253 mm of rainfall in the month.
- 31°C max day temperature
31 - 10 hours of sunshine per day
- 15 days with some rainfall
15 - 22°C min night temperature
22 - 14 hours of daylight per day
14 - High heat & humidity
H - 253 mm of monthly rainfall
253 - 11 (Extreme) UV index
11 - 29°C sea temperature
29
Key Largo weather in July
Expect daytime maximum temperatures of 32°C in Key Largo, Florida in July and very high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average with 15 days with some rainfall and typically 150 mm of rainfall in the month.
- 32°C max day temperature
32 - 10 hours of sunshine per day
- 15 days with some rainfall
15 - 23°C min night temperature
23 - 14 hours of daylight per day
14 - Very High heat & humidity
VH - 150 mm of monthly rainfall
150 - 11 (Extreme) UV index
11 - 29°C sea temperature
29
Key Largo weather in August
Expect daytime maximum temperatures of 32°C in Key Largo, Florida in August and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 17 days with some rainfall and typically 166 mm of rainfall in the month.
- 32°C max day temperature
32 - 9 hours of sunshine per day
- 17 days with some rainfall
17 - 23°C min night temperature
23 - 13 hours of daylight per day
13 - Very High heat & humidity
VH - 166 mm of monthly rainfall
166 - 11 (Extreme) UV index
11 - 30°C sea temperature
30
Key Largo weather in September
Expect daytime maximum temperatures of 32°C in Key Largo, Florida in September and very high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 17 days with some rainfall and typically 213 mm of rainfall in the month.
- 32°C max day temperature
32 - 9 hours of sunshine per day
- 17 days with some rainfall
17 - 23°C min night temperature
23 - 12 hours of daylight per day
12 - Very High heat & humidity
VH - 213 mm of monthly rainfall
213 - 10 (Very High) UV index
10 - 29°C sea temperature
29
Key Largo weather in October
Expect daytime maximum temperatures of 30°C in Key Largo, Florida in October and high heat and humidity based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 179 mm of rainfall in the month.
- 30°C max day temperature
30 - 8 hours of sunshine per day
- 13 days with some rainfall
13 - 21°C min night temperature
21 - 12 hours of daylight per day
12 - High heat & humidity
H - 179 mm of monthly rainfall
179 - 8 (Very High) UV index
8 - 28°C sea temperature
28
Key Largo weather in November
Expect daytime maximum temperatures of 27°C in Key Largo, Florida in November based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 55 mm of rainfall in the month.
- 27°C max day temperature
27 - 7 hours of sunshine per day
- 9 days with some rainfall
9 - 18°C min night temperature
18 - 11 hours of daylight per day
11 - Moderate heat & humidity
M - 55 mm of monthly rainfall
55 - 6 (High) UV index
6 - 26°C sea temperature
26
Key Largo weather in December
Expect daytime maximum temperatures of 25°C in Key Largo, Florida in December based on long-term weather averages. There are 7 hours of sunshine per day on average.
- 25°C max day temperature
25 - 7 hours of sunshine per day
- 6 days with some rainfall
6 - 15°C min night temperature
15 - 11 hours of daylight per day
11 - Low heat & humidity
L - 36 mm of monthly rainfall
36 - 5 (Moderate) UV index
5 - 25°C sea temperature
25
More about Key Largo
Key Largo by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Florida
- Explore latest special offers & online deals from TUI
- Free child places & £0 deposits with direct debit available
- Book summer & winter sun holidays in 2026/2027
The climate guide for Florida (Key Largo) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Tropical storm risk: Key Largo, Florida hurricane season
Compare Key Largo weather with the UK
The weather chart below compares the average monthly maximum daytime temperature for Key Largo, Florida, USA and the UK (London).
Maximum daytime temperature (°C)
Metric (°C / mm) | Imperial (°F / inches)
More about Florida
Be inspired
Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers
We promise not to share your details
Related posts
Popular travel offers
Explore holiday destinations
- Beach holidays
- City breaks
- Family holidays
- Half term holidays
- Spring holidays
- Summer holidays
- Autumn holidays
- Winter sun holidays
- Honeymoons
- Coolcations
- Compare places
- Ski resorts
Save with latest deals & discounts
- Holiday offers
- Top travel brands
- Airlines & flights
- Discount hotels
- TUI
- Jet2holidays
- Neilson
- Marella Cruises
- Holiday Extras
- Pierre & Vacances
- Caledonian Travel
- Club Med
Airport parking
- Manchester Airport
- Stansted Airport
- Bristol Airport
- Luton Airport
- Birmingham Airport
- Edinburgh Airport
- Gatwick Airport
- Glasgow Airport
- Newcastle Airport
Airport lounges
- Manchester Airport
- Birmingham Airport
- Bristol Airport
- Edinburgh Airport
- Glasgow Airport
- Heathrow Airport
- Newcastle Airport
- Stansted Airport
- Gatwick Airport









TUI deal finder