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Best time to visit · Florida, United States
On the climate data, the best time to visit Key Largo is November – April, scoring up to 92/100 with highs around 76°F (25°C) and 1.4 in (35 mm) of rain in March. May and October are good shoulder-season months. The toughest months are June and August & September, mainly because of rain.
Highs run from 73°F to 86°F across the year, and the yearly total is about 48.7 in (1237 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 73°F23°C | 75°F24°C | 76°F25°C | 79°F26°C | 82°F28°C | 85°F29°C | 86°F30°C | 86°F30°C | 85°F30°C | 83°F28°C | 78°F26°C | 76°F24°C |
| Avg low | 68°F20°C | 70°F21°C | 72°F22°C | 75°F24°C | 78°F26°C | 82°F28°C | 83°F28°C | 83°F29°C | 82°F28°C | 80°F26°C | 75°F24°C | 72°F22°C |
| Rain | 1.3 in34 mm | 1.5 in39 mm | 1.4 in35 mm | 2.5 in64 mm | 4.6 in118 mm | 7.4 in188 mm | 6.5 in166 mm | 7.2 in184 mm | 7.8 in197 mm | 4.5 in115 mm | 2.2 in55 mm | 1.7 in42 mm |
| Humidity | 76% | 76% | 73% | 72% | 74% | 76% | 75% | 75% | 77% | 76% | 75% | 78% |
| Cloud | 55% | 50% | 47% | 49% | 55% | 69% | 62% | 62% | 65% | 53% | 46% | 53% |
| Comfort | 87 | 89 | 92 | 89 | 77 | 56 | 59 | 56 | 54 | 74 | 89 | 86 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 1 m (3 ft), close to Key Largo's own ~2 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs of 73–76°F (23–24°C) and lows down to 68°F (20°C). It's the driest season, with only about 4.5 in (115 mm) of rain, 9% of the year's total. December – February feel humid, with humidity near 78%. Comfort peaks here: December – February rank with the year's best, and the season averages 87/100.
Temperatures climb through the season, from 76°F highs in March to 82°F by May. About 8.5 in (217 mm) of rain falls across these months, 18% of the year's total. Lows bottom out around 72°F (22°C). March & April are among the best-scoring months (season average 86/100).
The warmest stretch of the year, with highs of 85–86°F (29–30°C). It's the wettest season, with about 21.2 in (538 mm) of rain, 43% of the year's total. June – August feel humid, with humidity near 76%. Comfort scores bottom out in June and August; the season averages 57/100.
Temperatures slide from 85°F highs in September to 78°F by November. About 14.4 in (367 mm) of rain falls across these months, 30% of the year's total. September – November feel humid, with humidity near 77%. November is among the best-scoring months (season average 72/100).
By comfort score: 7 Great, 1 Good and 4 Fair. Great months: November – May. Tap a month for its own guide.
On the climate data, the best time to visit Key Largo is November – April, scoring up to 92/100 with highs around 76°F (25°C) and 1.4 in (35 mm) of rain in March. May and October are good shoulder-season months. The toughest months are June and August & September, mainly because of rain.
September is the wettest month, averaging about 7.8 in (197 mm) of rain. January is the driest, with about 1.3 in (34 mm). The yearly total is around 48.7 in (1237 mm).
January is the coldest, with average lows of 68°F (20°C) and highs of 73°F (23°C). The warmest is August, with average highs of 86°F (30°C).
Yes: in June – August humidity averages 76% with warm temperatures, so it feels muggy. Summer highs peak around 86°F (30°C).
The wettest three-month stretch is July – September, with about 21.5 in (547 mm) of rain combined. The driest stretch is January – March, with about 4.3 in (108 mm).
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