Jamestown weather in July

In July, Jamestown sees average daytime highs of 77°F and overnight lows near 60°F, with 4.5 in of rain across 14.4 wet days and about 14.8 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 77°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 hours at the start of July to 14 h 18 min by month's end. Set against the rest of the year, July is Jamestown's 2nd-clearest and 11th-windiest month. For the whole year in context, see Jamestown's year-round climate.

Daytime high
77°
1st warmest
Overnight low
60°
12th coldest
Rainfall
4.5 in
14.4 wet days
Daylight
14 h 48 min
4:59 AM – 7:46 PM
Cloud cover
59%
2nd clearest
Wind
6 mph
11th windiest
Solar energy
6.02 kWh/m²
Travel score
6.2
out of 10

Jamestown is city in Chautauqua County, New York, United States.

Density
1,281/km²
people per km²
Founded
1810

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 77°F through the month.

A typical July day in Jamestown reaches about 77°F in the afternoon and slips back to 60°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 85°F. Set against its neighbours, July runs about 4°F warmer than June and about 2°F warmer than August.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17659
27659
37659
47659
57659
67659
77759
87759
97760
107760
117760
127760
137760
147760
157760
167760
177760
187760
197760
207760
217760
227760
237760
247760
257760
267760
277760
287760
297660
307660
317660

How July really feels in Jamestown

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.

Jamestown weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 17°3.715.313.99.30.0
Feb33° / 18°2.91210.410.30.0
Mar42° / 25°3.713.67.711.70.5
Apr55° / 37°4.614.13.313.13.2
May65° / 47°4.714.80.114.45.2
Jun73° / 56°5.014.40156.0
Jul77° / 60°4.514.4014.86.2
Aug75° / 58°4.313.2013.76.5
Sep69° / 51°3.811012.36.2
Oct57° / 41°4.113.61.110.83.8
Nov45° / 32°3.813.96.79.61.0
Dec35° / 23°3.915.512.590.0

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 (%)
14852
24852
34951
45050
55050
65149
75149
85248
95248
105248
115248
125248
135149
145149
155149
165050
174951
185050
194951
204951
214951
224852
234852
244852
254951
264951
274951
284951
294951
304951
314951

Chance of precipitation in July

Any precipitation

Jamestown gets around 4.5 in of rain over 14.4 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 46% and peaks near 50% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
146
246
346
445
544
644
743
843
943
1043
1143
1244
1344
1445
1545
1646
1746
1847
1947
2048
2149
2249
2349
2450
2550
2650
2749
2849
2949
3049
3148

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 26% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1272527202
2262626202
3262626212
4262625212
5252625222
6252724222
7252724222
8242724232
9242724232
10232724243
11222625243
12212625243
13212626253
14202526253
15202527253
16192528253
17192428263
18182429263
19182430263
20172430263
21172431263
22162432253
23162432253
24152433243
25152534243
26152534233
27152634233
28152635222
29152735222
30152734212
31162734212

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 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 4:49 AM to 5:13 AM, and sunset from 7:51 PM to 7:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.04:497:51
215.04:507:51
315.04:507:51
415.04:517:51
515.04:517:51
615.04:527:51
715.04:527:50
814.94:537:50
914.94:547:50
1014.94:547:49
1114.94:557:49
1214.94:567:48
1314.94:577:48
1414.84:577:47
1514.84:587:47
1614.84:597:46
1714.85:007:46
1814.75:017:45
1914.75:017:44
2014.75:027:43
2114.75:037:43
2214.65:047:42
2314.65:057:41
2414.65:067:40
2514.55:077:39
2614.55:087:38
2714.55:097:37
2814.45:107:36
2914.45:117:35
3014.45:127:34
3114.35:137:33

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.02 kWh/m².

For context, solar energy here swings from a low near 1.31 kWh/m² to a high of 6.11 kWh/m² in June across the year — July's 6.02 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.3Intense
36.3Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.0Intense
176.0Intense
186.0Bright
195.9Bright
205.9Bright
215.9Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Is July a good time to visit Jamestown?

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

6.2
Sightseeing
2nd-best month of the year
5.6
Beach & pool
1st-best month of the year

July is a reasonable time to visit Jamestown for sightseeing.

What to pack for Jamestown in July

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

In July, Jamestown sees daytime highs around 77°F and nights near 60°F. Pack rain gear and sun protection. Worth having: light clothes. About 14 days see rain.

rain gearsun protectionlight clothes

Sea temperature near Jamestown in July

The nearest coast averages about 71°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 28 mi away) is warmest in August at about 73°F and coldest in February near 34°F.

It's comfortable for a long swim from Jul 6 to Sep 21 — about 2.6 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan37Bracing
Feb34Bracing
Mar34Bracing
Apr38Bracing
May48Bracing
Jun62Cool
Jul71Refreshing
Aug73Refreshing
Sep70Refreshing
Oct60Cool
Nov51Bracing
Dec44Bracing

UV index in Jamestown 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 Jamestown peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Jamestown?

Jamestown sits at 42.1°N, 79.2°W, 1,378 ft above sea level, in United States. The nearest listed city is Erie, 43 mi away.

Topography around Jamestown

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

Within 2 miles, the terrain around Jamestown has only modest variations in elevation — a maximum elevation change of 390 ft around an average of 1,437 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,030 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,900 ft.

The land around Jamestown is covered by trees (58%), grassland (21%) and artificial surfaces (20%) within 2 miles, trees (68%) and grassland (23%) within 10 miles, and trees (68%) within 50 miles.

2 miles
390 ft
10 miles
1,030 ft
50 miles
1,900 ft
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Erie 43 mi · Lackawanna 55 mi · Port Colborne 55 mi · West Seneca 57 mi · Buffalo 58 mi · Fort Erie 58 mi · Cheektowaga 61 mi · Welland 62 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 Jamestown (42.097°, -79.2353°, elevation 1,378 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. 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).