Stuart weather in August

In August, Stuart sees average daytime highs of 86°F and overnight lows near 79°F, with 4.8 in of rain across 21 wet days and about 13 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 86°F through the month. The sky is clear or mostly clear about 23% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 18 min at the start of August to 12 h 36 min by month's end. Set against the rest of the year, August is Stuart's 11th-clearest and 11th-windiest month. For the whole year in context, see Stuart's year-round climate.

Daytime high
86°
1st warmest
Overnight low
79°
12th coldest
Rainfall
4.8 in
21 wet days
Daylight
13 hours
5:56 AM – 6:54 PM
Cloud cover
66%
11th clearest
Wind
7 mph
11th windiest
Solar energy
5.8 kWh/m²
Travel score
3.7
out of 10

Stuart is seat of Martin County in Florida, United States.

Density
706/km²
people per km²
Founded
1914

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 86°F through the month.

A typical August day in Stuart reaches about 86°F in the afternoon and slips back to 79°F overnight — a 7°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 89°F. Set against its neighbours, August runs on par with July and about 2°F warmer than September.

70°80°90°151015202531
Avg high (°F)Avg low (°F)
18779
28779
38779
48779
58779
68779
78779
88779
98779
108779
118779
128779
138779
148779
158779
168679
178679
188679
198679
208679
218679
228679
238679
248679
258679
268679
278679
288679
298679
308679
318679

How August really feels in Stuart

Once humidity and wind are folded in, August 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 August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Stuart weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan72° / 62°2.07.110.57.2
Feb73° / 63°1.86.5117.5
Mar75° / 66°2.37.111.87.6
Apr78° / 70°2.27.112.67.3
May82° / 74°2.91013.36.4
Jun85° / 77°4.817.613.74.4
Jul86° / 79°3.618.213.54.0
Aug86° / 79°4.821133.7
Sep85° / 78°5.519.712.24.1
Oct82° / 75°4.012.211.36.0
Nov77° / 69°2.28.710.77.1
Dec74° / 65°1.67.310.37.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34258
44258
54258
64357
74357
84357
94357
104357
114456
124456
134456
144555
154555
164456
174456
184456
194258
204159
214159
224159
234159
243961
253961
263763
273664
283565
293565
303466
313466

Chance of precipitation in August

Any precipitation

Stuart gets around 4.8 in of rain over 21 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 68% and peaks near 72% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
165
265
365
465
565
665
765
865
965
1065
1165
1265
1365
1465
1566
1667
1767
1868
1969
2069
2169
2270
2370
2470
2571
2671
2771
2872
2972
3072
3172

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
106832
206733
306634
406535
506436
606436
706337
806238
906139
1006040
1115940
1215841
1315742
1415742
1515643
1615643
1715544
1815544
1915445
2015445
2115445
2215346
2315346
2415445
2515445
2615544
2725444
2825543
2925642
3025741
3125939

Wind in August

Winds average 7 mph in August.

Across August, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 18 min at the start of August to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over August. Sunrise moves from 5:48 AM to 6:03 AM, and sunset from 7:06 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:487:06
213.35:497:05
313.35:497:05
413.25:507:04
513.25:507:03
613.25:517:03
713.25:517:02
813.25:527:01
913.15:527:00
1013.15:536:59
1113.15:536:59
1213.15:546:58
1313.05:546:57
1413.05:556:56
1513.05:556:55
1613.05:566:54
1712.95:566:53
1812.95:576:52
1912.95:576:51
2012.95:586:50
2112.85:586:49
2212.85:596:48
2312.85:596:47
2412.86:006:46
2512.76:006:45
2612.76:016:44
2712.76:016:43
2812.76:026:42
2912.66:026:41
3012.66:036:40
3112.66:036:39

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.8 kWh/m².

For context, solar energy here swings from a low near 3.08 kWh/m² to a high of 6.42 kWh/m² in May across the year — August's 5.8 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.0Intense
56.0Bright
66.0Bright
76.0Bright
86.0Bright
96.0Bright
106.0Bright
116.0Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.7Bright
225.7Bright
235.7Bright
245.6Bright
255.6Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.4Bright
315.4Bright
Planning a trip in August

Hazard calendar for Stuart

In seasonPeak

In August, Stuart sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

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

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

Is August a good time to visit Stuart?

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

3.7
Sightseeing
12th-best month of the year
5.1
Beach & pool
11th-best month of the year

August is a weaker month for outdoor sightseeing in Stuart.

What to pack for Stuart in August

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

In August, Stuart sees daytime highs around 86°F and nights near 79°F. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Stuart in August

The nearest coast averages about 84°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 9 mi away) is warmest in August at about 84°F and coldest in February near 74°F.

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

75°80°85°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan74Refreshing
Feb74Refreshing
Mar75Refreshing
Apr76Warm
May79Warm
Jun82Warm
Jul83Tropical
Aug84Tropical
Sep84Tropical
Oct82Warm
Nov79Warm
Dec77Warm

UV index in Stuart in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Stuart peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 13UV 11Dec 18UV 5
UV index (midday)Level
Jan5High
Feb7High
Mar9Very high
Apr9Very high
May10Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep9Very high
Oct8Very high
Nov6High
Dec4Moderate

Air quality in Stuart in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Stuart is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1819 µg/m³Dec 138 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar11Good
Apr11Good
May11Good
Jun15Moderate
Jul20Moderate
Aug17Moderate
Sep12Good
Oct9Good
Nov8Good
Dec8Good
Location & terrain

Where is Stuart?

Stuart sits at 27.2°N, 80.3°W, 10 ft above sea level, in United States. The nearest listed city is Palm City, 2.5 mi away.

Topography around Stuart

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

Within 2 miles, the terrain around Stuart has only modest variations in elevation — a maximum elevation change of 39 ft around an average of 10 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 112 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 200 ft.

The land around Stuart is covered by artificial surfaces (34%), water (34%) and trees (21%) within 2 miles, water (34%), trees (26%) and grassland (20%) within 10 miles, and water (42%) and grassland (22%) within 50 miles.

2 miles
39 ft
10 miles
112 ft
50 miles
200 ft
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
August weather nearby: Palm City 2.5 mi · Port Saint Lucie 8.7 mi · Fort Pierce 18 mi · Jupiter 21 mi · Palm Beach Gardens 27 mi · Florida Ridge 28 mi · The Acreage 28 mi · Vero Beach South 30 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 Stuart (27.1975°, -80.2528°, elevation 10 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).