Portsmouth weather in July

In July, Portsmouth sees average daytime highs of 73°F and overnight lows near 67°F, with 3.0 in of rain across 8.9 wet days and about 14.7 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 73°F through the month. The sky is clear or mostly clear about 35% of the time in July, and the air most often feels muggy.

Daylight stretches from about 15 hours at the start of July to 14 h 18 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
73°
1st warmest
Overnight low
67°
11th coldest
Rainfall
3.0 in
8.9 wet days
Daylight
14 h 42 min
4:29 AM – 7:13 PM
Cloud cover
55%
4th clearest
Wind
10 mph
11th windiest
Solar energy
6.12 kWh/m²
Travel score
7.0
out of 10

Portsmouth is town in Newport County, Rhode Island, USA.

Founded
1638

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 73°F through the month.

A typical July day in Portsmouth reaches about 73°F in the afternoon and slips back to 67°F overnight — a 5°F spread between the day's warmth and the night's chill. On most days the high lands between 68°F and 77°F. Set against its neighbours, July runs about 6°F warmer than June and on par with August.

60°70°80°151015202531
Avg high (°F)Avg low (°F)
17165
27165
37166
47166
57166
67266
77267
87267
97267
107267
117267
127367
137367
147368
157368
167368
177368
187368
197368
207368
217368
227368
237368
247469
257469
267469
277469
287469
297469
307469
317469

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 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan38° / 28°4.410.64.59.30.0
Feb38° / 29°3.89.63.910.30.0
Mar42° / 34°5.110.93.611.70.3
Apr49° / 42°4.611.40.613.12.0
May57° / 51°3.910.9014.34.0
Jun66° / 60°3.79.30156.1
Jul73° / 67°3.08.9014.77.0
Aug73° / 68°3.68.8013.77.1
Sep68° / 62°4.18.8012.36.6
Oct60° / 53°5.1100.110.95.0
Nov51° / 43°4.59.70.49.72.7
Dec44° / 35°5.211.52.990.6

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 19% of July, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35347
45446
55446
65446
75545
85545
95545
105644
115644
125644
135644
145644
155644
165545
175545
185545
195446
205446
215347
225248
235347
245347
255347
265347
275446
285446
295446
305545
315545

Chance of precipitation in July

Any precipitation

Portsmouth gets around 3.0 in of rain over 8.9 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
328
427
527
627
727
827
927
1027
1127
1227
1327
1428
1528
1629
1729
1829
1930
2030
2131
2231
2331
2431
2531
2631
2730
2830
2930
3030
3130

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 51% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
152140313
252040314
351940324
451840325
541740335
641740336
741640347
831640347
931539358
1031538359
11314373610
12214373710
13213363811
14213343912
15213333912
16213324013
17213314113
18213304214
19212294314
20212284414
21112274415
22112274515
23112264516
24112264516
25112264517
26112264517
27112264417
28112264417
29112264317
30112274317
31112274217

Wind in July

Winds average 10 mph in July.

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 15 hours at the start of July to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:19 AM to 4:42 AM, and sunset from 7:18 PM to 7:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.04:197:18
215.04:197:18
315.04:207:18
414.94:207:17
514.94:217:17
614.94:227:17
714.94:227:17
814.94:237:16
914.94:237:16
1014.94:247:16
1114.84:257:15
1214.84:257:15
1314.84:267:14
1414.84:277:14
1514.84:287:13
1614.74:297:13
1714.74:297:12
1814.74:307:11
1914.74:317:11
2014.64:327:10
2114.64:337:09
2214.64:347:09
2314.64:347:08
2414.54:357:07
2514.54:367:06
2614.54:377:05
2714.44:387:04
2814.44:397:03
2914.44:407:02
3014.34:417:01
3114.34:427:00

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.12 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.64 kWh/m² to a high of 6.12 kWh/m² in July across the year — July's 6.12 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.1Intense
176.1Intense
186.1Intense
196.0Intense
206.0Intense
216.0Bright
226.0Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
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).

7.0
Sightseeing
2nd-best month of the year
5.2
Beach & pool
2nd-best month of the year

July is one of the better times to visit Portsmouth for general sightseeing.

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 73°F and nights near 67°F. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Portsmouth in July

The nearest coast averages about 67°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 mi away) is warmest in August at about 69°F and coldest in February near 39°F.

It's comfortable for a long swim from Jul 26 to Aug 30 — about 1.2 months when the water holds above 68°F.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan43Bracing
Feb39Bracing
Mar40Bracing
Apr44Bracing
May51Bracing
Jun60Cool
Jul67Cool
Aug69Refreshing
Sep67Cool
Oct61Cool
Nov55Bracing
Dec49Bracing

UV index in Portsmouth in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Portsmouth peaks around June 23 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 8Dec 23UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun8Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Portsmouth?

Portsmouth sits at 41.6°N, 71.3°W, 141 ft above sea level, in United States. The nearest listed city is Middletown, 4.3 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 292 ft around an average of 66 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 358 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,181 ft.

The land around Portsmouth is covered by water (44%), trees (27%) and grassland (20%) within 2 miles, water (44%) and trees (36%) within 10 miles, and trees (50%) and water (43%) within 50 miles.

2 miles
292 ft
10 miles
358 ft
50 miles
1,181 ft
treesgrasslandcroplandartificial surfaceswaterwetland
July weather nearby: Middletown 4.3 mi · Bristol 5.0 mi · Newport 8.7 mi · Fall River 8.7 mi · Barrington 9.9 mi · Swansea 11 mi · Warwick 11 mi · North Kingstown 12 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 (41.6023°, -71.2503°, elevation 141 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).