Jacksonville weather in August

In August, Jacksonville sees average daytime highs of 86°F and overnight lows near 72°F, with 6.8 in of rain across 17.3 wet days and about 13.3 hours of daylight. It is the 2nd-warmest and 1st-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 24% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Jacksonville's 10th-clearest and 12th-windiest month. For the whole year in context, see Jacksonville's year-round climate.

Daytime high
86°
2nd warmest
Overnight low
72°
11th coldest
Rainfall
6.8 in
17.3 wet days
Daylight
13 h 18 min
5:34 AM – 6:53 PM
Cloud cover
62%
10th clearest
Wind
5 mph
12th windiest
Solar energy
5.17 kWh/m²
Travel score
4.1
out of 10

Jacksonville is city in Onslow County, North Carolina, United States.

Density
513/km²
people per km²
Founded
1757

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 Jacksonville reaches about 86°F in the afternoon and slips back to 72°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 81°F and 91°F. Set against its neighbours, August runs about 1°F cooler than July and about 4°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18773
28773
38773
48773
58773
68773
78772
88772
98772
108772
118672
128672
138672
148672
158672
168672
178672
188671
198671
208671
218671
228671
238671
248671
258571
268571
278570
288570
298570
308570
318570

How August really feels in Jacksonville

Once humidity and wind are folded in, August averages 29 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
29
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.

Jacksonville weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan55° / 37°3.690.69.93.7
Feb58° / 39°3.38.90.510.74.4
Mar64° / 44°3.69.40.111.76.0
Apr73° / 53°3.38.8012.87.0
May79° / 61°4.111013.86.5
Jun85° / 69°5.615.5014.34.5
Jul87° / 73°6.719.8014.13.6
Aug86° / 72°6.817.3013.34.1
Sep82° / 66°6.513.3012.25.7
Oct74° / 56°4.08.5011.17.1
Nov65° / 45°3.67.9010.26.4
Dec58° / 40°3.69.40.19.74.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34060
44159
54159
64159
74258
84258
94357
104357
114456
124456
134654
144555
154654
164753
174654
184852
194852
204951
214852
224951
234852
244951
254951
264852
274951
284951
294951
304852
314852

Chance of precipitation in August

Any precipitation

Jacksonville gets around 6.8 in of rain over 17.3 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 56% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
161
261
360
460
560
660
759
859
959
1059
1159
1259
1359
1459
1558
1658
1757
1857
1956
2056
2155
2254
2354
2453
2553
2652
2751
2851
2950
3050
3150

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1015115924
2016125823
3016125823
4016135822
5016145722
6016155721
7016165621
8016165621
9016175521
10016175521
11016185421
12016185421
13016185520
14016195420
15016195420
16017205319
17017205418
18017215417
19017215516
20027225316
21027225415
22027235414
23028235413
24028235413
25028245412
26029245312
27029245411
280210255310
290311255110
30131125519
31131225509

Wind in August

Winds average 5 mph in August, the calmest month.

Across August, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:23 AM to 5:46 AM, and sunset from 7:09 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:237:09
213.75:247:08
313.75:247:07
413.75:257:06
513.75:267:05
613.65:277:04
713.65:277:03
813.65:287:02
913.55:297:01
1013.55:307:00
1113.55:316:59
1213.45:316:58
1313.45:326:57
1413.45:336:56
1513.35:346:54
1613.35:346:53
1713.35:356:52
1813.25:366:51
1913.25:376:50
2013.25:376:48
2113.15:386:47
2213.15:396:46
2313.15:406:45
2413.05:406:43
2513.05:416:42
2613.05:426:41
2712.95:436:39
2812.95:436:38
2912.95:446:37
3012.85:456:35
3112.85:466:34

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.17 kWh/m².

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 6.04 kWh/m² in May across the year — August's 5.17 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Hazard calendar for Jacksonville

In seasonPeak

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

Jacksonville 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 Jacksonville?

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

4.1
Sightseeing
10th-best month of the year
5.7
Beach & pool
4th-best month of the year

August is a reasonable time to visit Jacksonville for sightseeing.

What to pack for Jacksonville in August

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

In August, Jacksonville sees daytime highs around 86°F and nights near 72°F. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Jacksonville in August

The nearest coast averages about 82°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 19 mi away) is warmest in August at about 82°F and coldest in February near 58°F.

It's comfortable for a long swim from May 6 to Nov 13 — about 6.3 months when the water holds above 68°F.

60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan60Cool
Feb58Bracing
Mar60Cool
Apr64Cool
May70Refreshing
Jun77Warm
Jul81Warm
Aug82Warm
Sep80Warm
Oct74Refreshing
Nov67Cool
Dec63Cool

UV index in Jacksonville in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jacksonville peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 14UV 9Dec 19UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep7Very high
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Jacksonville 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 Jacksonville is worst in March — around 21 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (December, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1720 µg/m³Dec 136 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb13Moderate
Mar21Moderate
Apr14Moderate
May13Moderate
Jun17Moderate
Jul17Moderate
Aug14Moderate
Sep10Good
Oct8Good
Nov7Good
Dec6Good
Location & terrain

Where is Jacksonville?

Jacksonville sits at 34.8°N, 77.4°W, 13 ft above sea level, in United States. The nearest listed city is Havelock, 31 mi away.

Topography around Jacksonville

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

Within 2 miles, the terrain around Jacksonville has only modest variations in elevation — a maximum elevation change of 85 ft around an average of 26 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 246 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 289 ft.

The land around Jacksonville is covered by trees (55%) within 2 miles, trees (69%) within 10 miles, and trees (56%) and water (25%) within 50 miles.

2 miles
85 ft
10 miles
246 ft
50 miles
289 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Havelock 31 mi · New Bern 33 mi · Kinston 36 mi · Wilmington 47 mi · Leland 49 mi · Goldsboro 54 mi · Greenville 60 mi · Wilson 72 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 Jacksonville (34.754°, -77.4302°, elevation 13 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).