Derry weather in July

In July, Derry sees average daytime highs of 82°F and overnight lows near 63°F, with 3.3 in of rain across 10 wet days and about 14.8 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 82°F through the month. The sky is clear or mostly clear about 27% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 06 min at the start of July to 14 h 24 min by month's end. Set against the rest of the year, July is Derry's 7th-clearest and 11th-windiest month. For the whole year in context, see Derry's year-round climate.

Daytime high
82°
1st warmest
Overnight low
63°
12th coldest
Rainfall
3.3 in
10 wet days
Daylight
14 h 54 min
4:25 AM – 7:17 PM
Cloud cover
59%
7th clearest
Wind
6 mph
11th windiest
Solar energy
5.88 kWh/m²
Travel score
6.0
out of 10

Derry is census-designated place in New Hampshire, United States.

Density
549/km²
people per km²

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 82°F through the month.

A typical July day in Derry reaches about 82°F in the afternoon and slips back to 63°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 92°F. Set against its neighbours, July runs about 6°F warmer than June and about 2°F warmer than August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18262
28262
38262
48262
58262
68263
78263
88263
98263
108263
118363
128363
138363
148363
158363
168363
178364
188364
198364
208364
218364
228364
238364
248364
258364
268364
278364
288364
298264
308264
318263

How July really feels in Derry

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.

Derry weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 17°3.19.36.49.20.0
Feb35° / 18°3.08.66.310.20.0
Mar44° / 27°4.010.75.411.60.7
Apr56° / 38°3.810.41.513.13.8
May67° / 48°3.010.30.114.46.0
Jun77° / 58°3.511.1015.16.5
Jul82° / 63°3.310014.86.0
Aug81° / 61°3.29013.86.7
Sep73° / 54°3.38.1012.37.0
Oct60° / 43°3.99.50.310.85.0
Nov48° / 33°3.49.21.49.51.9
Dec38° / 24°4.110.15.18.90.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 23% of July, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24852
34951
44951
55050
65149
75149
85347
95248
105347
115347
125347
135248
145248
155149
165149
175050
184951
194951
204951
214852
224852
234852
244753
254753
264852
274951
284951
294951
305050
315050

Chance of precipitation in July

Any precipitation

Derry gets around 3.3 in of rain over 10 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 33% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
235
335
434
534
633
733
833
933
1032
1133
1233
1333
1433
1533
1633
1733
1833
1933
2033
2133
2233
2333
2433
2533
2633
2733
2833
2933
3033
3133

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1302625163
2302625163
3292625163
4292725163
5282725173
6282725173
7272725173
8272726173
9262726183
10252727183
11252628183
12242628193
13242529193
14232529203
15232430203
16232430203
17222331203
18222331214
19212232214
20202232214
21202232224
22192232224
23192232224
24192332224
25192332224
26192332224
27192332224
28192331225
29192431225
30202430225
31202430224

Wind in July

Winds average 6 mph in July.

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

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 06 min at the start of July to 14 h 24 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 4:15 AM to 4:39 AM, and sunset from 7:22 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.14:157:22
215.14:157:22
315.14:167:22
415.14:167:22
515.14:177:22
615.14:187:22
715.04:187:21
815.04:197:21
915.04:207:21
1015.04:207:20
1115.04:217:20
1215.04:227:19
1314.94:227:19
1414.94:237:18
1514.94:247:18
1614.94:257:17
1714.84:267:16
1814.84:277:16
1914.84:277:15
2014.84:287:14
2114.74:297:13
2214.74:307:13
2314.74:317:12
2414.64:327:11
2514.64:337:10
2614.64:347:09
2714.54:357:08
2814.54:367:07
2914.54:377:06
3014.44:387:05
3114.44:397:04

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.88 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 5.88 kWh/m² in July across the year — July's 5.88 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.0Intense
86.0Intense
96.0Intense
106.0Intense
116.0Bright
126.0Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.5Bright
Planning a trip in July

Hazard calendar for Derry

In seasonPeak

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

Derry 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 Derry?

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

6.0
Sightseeing
4th-best month of the year
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Derry in July

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

In July, Derry sees daytime highs around 82°F and nights near 63°F. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Derry in July

The nearest coast averages about 64°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 35 mi away) is warmest in August at about 65°F and coldest in March near 39°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan42Bracing
Feb40Bracing
Mar39Bracing
Apr42Bracing
May49Bracing
Jun57Bracing
Jul64Cool
Aug65Cool
Sep62Cool
Oct56Bracing
Nov49Bracing
Dec46Bracing

UV index in Derry in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Derry peaks around July 10 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 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 highHighHighModerateLowJul 10UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun7High
Jul7Very high
Aug5Moderate
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Derry 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 Derry is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1715 µg/m³Nov 188 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar13Moderate
Apr13Moderate
May14Moderate
Jun13Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Derry?

Derry sits at 42.9°N, 71.3°W, 276 ft above sea level, in United States. The nearest listed city is Derry Village, 1.2 mi away.

Topography around Derry

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

Within 2 miles, the terrain around Derry has only modest variations in elevation — a maximum elevation change of 325 ft around an average of 351 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 584 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,176 ft.

The land around Derry is covered by trees (68%) within 2 miles, trees (80%) within 10 miles, and trees (75%) within 50 miles.

2 miles
325 ft
10 miles
584 ft
50 miles
3,176 ft
treesgrasslandcroplandartificial surfaceswaterwetland
July weather nearby: Derry Village 1.2 mi · Merrimack 8.7 mi · Salem 9.3 mi · Manchester 9.9 mi · Bedford 11 mi · Nashua 11 mi · Methuen 12 mi · Haverhill 14 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 Derry (42.8806°, -71.3273°, elevation 276 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).