Key West weather in July

In July, Key West sees average daytime highs of 84°F and overnight lows near 81°F, with 2.5 in of rain across 12.9 wet days and about 13.4 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 84°F through the month. The sky is clear or mostly clear about 35% of the time in July, and the air most often feels miserable.

Daylight stretches from about 13 h 30 min at the start of July to 13 h 12 min by month's end. Set against the rest of the year, July is Key West's 9th-clearest and 12th-windiest month. For the whole year in context, see Key West's year-round climate.

Daytime high
84°
2nd warmest
Overnight low
81°
11th coldest
Rainfall
2.5 in
12.9 wet days
Daylight
13 h 24 min
5:51 AM – 7:14 PM
Cloud cover
56%
9th clearest
Wind
10 mph
12th windiest
Solar energy
6.73 kWh/m²
Travel score
5.3
out of 10

Key West is county seat of Monroe County, Florida, United States.

Density
1,373/km²
people per km²
Founded
1828

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 84°F through the month.

A typical July day in Key West reaches about 84°F in the afternoon and slips back to 81°F overnight — a 3°F spread between the day's warmth and the night's chill. On most days the high lands between 83°F and 85°F. Set against its neighbours, July runs on par with June and on par with August.

75°80°85°151015202531
Avg high (°F)Avg low (°F)
18381
28381
38381
48381
58381
68381
78381
88481
98481
108481
118481
128481
138481
148481
158481
168481
178481
188481
198481
208481
218481
228481
238481
248481
258481
268481
278481
288481
298481
308481
318481

How July really feels in Key West

Once humidity and wind are folded in, July averages 31 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
31
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Key West weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan73° / 69°1.55.710.67.8
Feb73° / 70°1.2411.18.1
Mar74° / 71°1.04.211.88.4
Apr77° / 74°1.54.512.68.3
May80° / 77°2.67.913.27.3
Jun83° / 80°4.112.713.55.7
Jul84° / 81°2.512.913.45.3
Aug84° / 81°4.116.112.94.8
Sep83° / 80°5.417.712.24.7
Oct81° / 78°4.612.711.46.2
Nov77° / 74°1.55.810.87.8
Dec75° / 71°1.35.110.58.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 15% of July, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24852
34852
44852
54852
64951
74951
85050
95050
105149
115149
125149
135149
145050
155050
165149
175149
185149
195149
205149
215149
225149
235149
245149
255149
265149
275149
285149
295149
305149
315149

Chance of precipitation in July

Any precipitation

Key West gets around 2.5 in of rain over 12.9 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 46% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
140
240
339
439
539
639
739
839
939
1039
1139
1239
1340
1440
1541
1641
1742
1843
1944
2044
2145
2245
2345
2445
2546
2646
2746
2846
2946
3046
3146

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the miserable band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
14357
24357
34357
44456
54555
64555
74654
84654
94654
104654
114654
124654
134654
144555
154555
164456
174357
184258
194159
204060
213961
223862
233763
243664
253565
263466
273367
283268
293169
303169
313070

Wind in July

Winds average 10 mph in July, the calmest month.

Across July, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 30 min at the start of July to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 5:45 AM to 5:58 AM, and sunset from 7:16 PM to 7:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:457:16
213.55:467:16
313.55:467:16
413.55:467:16
513.55:477:16
613.55:477:16
713.55:477:16
813.55:487:16
913.55:487:15
1013.45:497:15
1113.45:497:15
1213.45:497:15
1313.45:507:15
1413.45:507:15
1513.45:517:15
1613.45:517:14
1713.45:527:14
1813.45:527:14
1913.35:537:14
2013.35:537:13
2113.35:537:13
2213.35:547:12
2313.35:547:12
2413.35:557:12
2513.35:557:11
2613.35:567:11
2713.25:567:10
2813.25:577:10
2913.25:577:09
3013.25:587:09
3113.25:587:08

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.73 kWh/m².

For context, solar energy here swings from a low near 3.66 kWh/m² to a high of 6.9 kWh/m² in May across the year — July's 6.73 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.7Intense
316.6Intense
Planning a trip in July

Hazard calendar for Key West

In seasonPeak

In July, Key West sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Key West sits in the Atlantic hurricane belt; the season peaks August–October.

Key West's rainy season runs May–October, when most of the year's rain falls.

Atlantic hurricane
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Key West?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.3
Sightseeing
10th-best month of the year
6.6
Beach & pool
6th-best month of the year

July is a reasonable time to visit Key West for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Key West in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Key West sees daytime highs around 84°F and nights near 81°F. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

Sea temperature near Key West in July

The nearest coast averages about 85°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 86°F and coldest in February near 73°F.

The water stays above 68°F all year — warm enough for a swim any month.

70°75°80°85°90°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan73Refreshing
Feb73Refreshing
Mar74Refreshing
Apr77Warm
May80Warm
Jun83Tropical
Jul85Tropical
Aug86Tropical
Sep85Tropical
Oct83Tropical
Nov78Warm
Dec75Warm

UV index in Key West in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Key West peaks around July 18 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 18UV 12Dec 18UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr11Extreme
May11Extreme
Jun11Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct9Very high
Nov6High
Dec5High

Air quality in Key West in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Key West is worst in July — around 18 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (December, 4 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1818 µg/m³Dec 144 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb5Good
Mar6Good
Apr8Good
May9Good
Jun15Moderate
Jul18Moderate
Aug16Moderate
Sep10Good
Oct7Good
Nov5Good
Dec4Good
Location & terrain

Where is Key West?

Key West sits at 24.6°N, 81.8°W, 3 ft above sea level, in United States. The nearest listed city is Marco Island, 96 mi away.

Topography around Key West

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Key West.

Within 2 miles, the terrain around Key West has only modest variations in elevation — a maximum elevation change of 39 ft around an average of 3 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 75 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 52 ft.

The land around Key West is covered by water (64%) and artificial surfaces (26%) within 2 miles, water (95%) within 10 miles, and water (98%) within 50 miles.

2 miles
39 ft
10 miles
75 ft
50 miles
52 ft
treesgrasslandartificial surfacesbare terrainwatermangroves
July weather nearby: Marco Island 96 mi · Santa Cruz del Norte 98 mi · Alamar 101 mi · Cojímar 101 mi · Ciudad Camilo Cienfuegos 103 mi · Varadero 103 mi · Homestead 103 mi · Guanabacoa 104 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Key West (24.5552°, -81.7816°, elevation 3 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).