Fort Pierce weather in August

In August, Fort Pierce sees average daytime highs of 86°F and overnight lows near 79°F, with 5.7 in of rain across 23 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 miserable.

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 Fort Pierce's 11th-clearest and 11th-windiest month. For the whole year in context, see Fort Pierce's year-round climate.

Daytime high
86°
1st warmest
Overnight low
79°
12th coldest
Rainfall
5.7 in
23 wet days
Daylight
13 hours
5:56 AM – 6:55 PM
Cloud cover
66%
11th clearest
Wind
7 mph
11th windiest
Solar energy
5.79 kWh/m²
Travel score
3.5
out of 10

Fort Pierce is county seat of St. Lucie County, Florida, United States.

Density
587/km²
people per km²
Founded
1901

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 Fort Pierce 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 83°F and 88°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)
18679
28679
38679
48679
58679
68679
78679
88679
98679
108679
118679
128679
138679
148679
158679
168679
178679
188679
198679
208679
218679
228679
238579
248579
258579
268579
278579
288579
298579
308579
318579

How August really feels in Fort Pierce

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.

Fort Pierce 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
Jan71° / 62°2.17.210.57.1
Feb73° / 63°1.86.8117.3
Mar75° / 65°2.37.511.87.5
Apr78° / 69°2.27.912.67.2
May82° / 74°3.01113.36.3
Jun84° / 77°5.619.813.74.2
Jul86° / 78°4.620.913.63.8
Aug86° / 79°5.723133.5
Sep84° / 78°6.02112.24.0
Oct81° / 74°4.313.311.35.9
Nov76° / 69°2.29.310.67.1
Dec73° / 65°1.77.310.37.2

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 15% of August, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34060
44060
54060
64060
74060
84060
94060
104159
114159
124159
134159
144258
154258
164258
174060
183961
193961
203961
213763
223763
233763
243664
253565
263565
273466
283367
293367
303268
313268

Chance of precipitation in August

Any precipitation

Fort Pierce gets around 5.7 in of rain over 23 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 74% and peaks near 76% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
172
272
372
473
573
673
773
873
973
1073
1173
1273
1373
1473
1574
1674
1775
1875
1975
2075
2175
2275
2375
2475
2575
2675
2776
2876
2976
3076
3176

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the miserable band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
105050
205050
304951
404951
504852
604753
704753
804654
904555
1004555
1114455
1214455
1314356
1414356
1514356
1614257
1714257
1814257
1914158
2014158
2114158
2214158
2314158
2414158
2514257
2614257
2714356
2814455
2914554
3024652
3124751

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.

051015151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207light breeze
218light breeze
228light 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 7:07 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:487:07
213.35:497:06
313.35:497:05
413.35:507:05
513.25:507:04
613.25:517:03
713.25:517:03
813.25:527:02
913.15:527:01
1013.15:537:00
1113.15:536:59
1213.15:546:58
1313.15:546:58
1413.05:556:57
1513.05:556:56
1613.05:566:55
1713.05:566:54
1812.95:576:53
1912.95:576:52
2012.95:586:51
2112.95:586:50
2212.85:596:49
2312.85:596:48
2412.86:006:47
2512.86:006:46
2612.76:016:45
2712.76:016:44
2812.76:026:43
2912.76:026:42
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 5.79 kWh/m².

For context, solar energy here swings from a low near 3.05 kWh/m² to a high of 6.41 kWh/m² in May across the year — August's 5.79 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
295.4Bright
305.4Bright
315.4Bright
Planning a trip in August

Hazard calendar for Fort Pierce

In seasonPeak

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

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

Fort Pierce'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 August a good time to visit Fort Pierce?

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

3.5
Sightseeing
12th-best month of the year
4.8
Beach & pool
11th-best month of the year

August is a weaker month for outdoor sightseeing in Fort Pierce.

What to pack for Fort Pierce in August

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

In August, Fort Pierce sees daytime highs around 86°F and nights near 79°F. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Fort Pierce 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 13 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
Mar74Refreshing
Apr76Warm
May79Warm
Jun82Warm
Jul83Tropical
Aug84Tropical
Sep84Tropical
Oct82Warm
Nov79Warm
Dec77Warm

UV index in Fort Pierce 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 Fort Pierce peaks around July 12 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 12UV 11Dec 18UV 4
UV index (midday)Level
Jan5Moderate
Feb7High
Mar9Very high
Apr9Very high
May10Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep9Very high
Oct8Very high
Nov5High
Dec4Moderate

Air quality in Fort Pierce 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 Fort Pierce is worst in July — around 17 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1817 µg/m³Dec 156 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar9Good
Apr10Good
May10Good
Jun14Moderate
Jul17Moderate
Aug15Moderate
Sep10Good
Oct8Good
Nov6Good
Dec6Good
Location & terrain

Where is Fort Pierce?

Fort Pierce sits at 27.4°N, 80.3°W, 16 ft above sea level, in United States. The nearest listed city is Florida Ridge, 9.9 mi away.

Topography around Fort Pierce

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

Within 2 miles, the terrain around Fort Pierce has only modest variations in elevation — a maximum elevation change of 46 ft around an average of 13 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 148 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 200 ft.

The land around Fort Pierce is covered by water (38%) and artificial surfaces (30%) within 2 miles, water (44%), grassland (22%) and trees (20%) within 10 miles, and water (40%), grassland (28%) and trees (20%) within 50 miles.

2 miles
46 ft
10 miles
148 ft
50 miles
200 ft
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
August weather nearby: Florida Ridge 9.9 mi · Port Saint Lucie 11 mi · Vero Beach South 13 mi · Vero Beach 14 mi · Stuart 18 mi · Palm City 20 mi · Sebastian 27 mi · Jupiter 38 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 Fort Pierce (27.4467°, -80.3256°, elevation 16 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).