Portsmouth weather in July

In July, Portsmouth sees average daytime highs of 85°F and overnight lows near 68°F, with 3.9 in of rain across 12.5 wet days and about 14.4 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 85°F through the month. The sky is clear or mostly clear about 30% of the time in July, and the air most often feels muggy.

Daylight stretches from about 14 h 42 min at the start of July to 14 h 06 min by month's end. Set against the rest of the year, July is Portsmouth's 4th-clearest and 11th-windiest month. For the whole year in context, see Portsmouth's year-round climate.

Daytime high
85°
1st warmest
Overnight low
68°
12th coldest
Rainfall
3.9 in
12.5 wet days
Daylight
14 h 30 min
5:24 AM – 7:51 PM
Cloud cover
58%
4th clearest
Wind
5 mph
11th windiest
Solar energy
5.96 kWh/m²
Travel score
4.9
out of 10

Portsmouth is city in Scioto County, Ohio, United States.

Density
712/km²
people per km²
Founded
1803

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 85°F through the month.

A typical July day in Portsmouth reaches about 85°F in the afternoon and slips back to 68°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 92°F. Set against its neighbours, July runs about 3°F warmer than June and on par with August.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18567
28567
38567
48567
58567
68568
78568
88568
98568
108568
118568
128568
138568
148568
158568
168568
178568
188568
198568
208568
218568
228568
238568
248568
258568
268568
278568
288568
298568
308568
318568

How July really feels in Portsmouth

Once humidity and wind are folded in, July averages 0 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
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Portsmouth weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 27°3.410.23.69.60.1
Feb45° / 29°3.410.13.710.50.8
Mar54° / 36°4.2121.711.73.1
Apr66° / 47°4.412.40.3135.6
May74° / 56°4.612.9014.16.2
Jun82° / 64°4.313.1014.75.6
Jul85° / 68°3.912.5014.44.9
Aug85° / 66°3.011.2013.55.3
Sep79° / 59°3.38.1012.37.0
Oct67° / 48°3.190.1116.3
Nov54° / 38°3.28.70.69.93.5
Dec45° / 31°3.6102.39.30.9

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 22% of July, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55149
65248
75248
85248
95248
105248
115149
125149
135149
145149
155149
165050
175050
185050
195050
204951
215050
225050
235149
245149
255248
265347
275446
285446
295545
305545
315545

Chance of precipitation in July

Any precipitation

Portsmouth gets around 3.9 in of rain over 12.5 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 40% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
439
539
639
739
839
939
1039
1139
1240
1340
1440
1541
1641
1741
1842
1942
2042
2142
2242
2341
2441
2541
2640
2740
2840
2939
3039
3138

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the muggy band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
18142140180
27142140190
37142039190
47142039200
56142039210
66142039210
76142039220
86132038230
95132038240
105132038240
115122037250
124122037260
134122036270
144112036281
154112035291
164112035301
174112034311
183112034311
193102034321
203112033321
213112033331
223112033331
233112133321
242112133321
252122133311
262122233301
272122233291
283132333281
293132433270
303142433260
313142533250

Wind in July

Winds average 5 mph in July.

Across July, daily wind ranges from about 5 mph on the calmest days to 5 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
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 42 min at the start of July to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 5:15 AM to 5:36 AM, and sunset from 7:56 PM to 7:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.75:157:56
214.75:157:56
314.75:167:56
414.75:167:55
514.65:177:55
614.65:177:55
714.65:187:55
814.65:197:55
914.65:197:54
1014.65:207:54
1114.65:207:54
1214.55:217:53
1314.55:227:53
1414.55:227:52
1514.55:237:52
1614.55:247:51
1714.45:247:51
1814.45:257:50
1914.45:267:50
2014.45:277:49
2114.35:287:48
2214.35:287:48
2314.35:297:47
2414.35:307:46
2514.25:317:46
2614.25:327:45
2714.25:327:44
2814.25:337:43
2914.15:347:42
3014.15:357:41
3114.15:367:40

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.96 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 6.11 kWh/m² in June across the year — July's 5.96 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.0Intense
136.0Intense
146.0Intense
156.0Bright
166.0Bright
176.0Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in July

Hazard calendar for Portsmouth

In seasonPeak

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

Portsmouth 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 July a good time to visit Portsmouth?

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

4.9
Sightseeing
7th-best month of the year
6.6
Beach & pool
3rd-best month of the year

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

What to pack for Portsmouth in July

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

In July, Portsmouth sees daytime highs around 85°F and nights near 68°F. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Portsmouth in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Portsmouth peaks around June 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Portsmouth 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 Portsmouth is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1218 µg/m³Oct 248 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May14Moderate
Jun17Moderate
Jul18Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Portsmouth?

Portsmouth sits at 38.7°N, 83.0°W, 531 ft above sea level, in United States. The nearest listed city is Ashland, 26 mi away.

Topography around Portsmouth

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

Within 2 miles, the terrain around Portsmouth has only modest variations in elevation — a maximum elevation change of 640 ft around an average of 620 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 817 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 925 ft.

The land around Portsmouth is covered by trees (42%) within 2 miles, trees (77%) within 10 miles, and trees (77%) within 50 miles.

2 miles
640 ft
10 miles
817 ft
50 miles
925 ft
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Ashland 26 mi · Meads 27 mi · Huntington 37 mi · Chillicothe 42 mi · Athens 63 mi · Lancaster 71 mi · Charleston 78 mi · Grove City 80 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 Portsmouth (38.7317°, -82.9977°, elevation 531 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). 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).