Jamestown weather in August

In August, Jamestown sees average daytime highs of 75°F and overnight lows near 58°F, with 4.3 in of rain across 13.2 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 75°F through the month. The sky is clear or mostly clear about 29% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Jamestown's 1st-clearest and 12th-windiest month. For the whole year in context, see Jamestown's year-round climate.

Daytime high
75°
2nd warmest
Overnight low
58°
11th coldest
Rainfall
4.3 in
13.2 wet days
Daylight
13 h 42 min
5:30 AM – 7:13 PM
Cloud cover
58%
1st clearest
Wind
6 mph
12th windiest
Solar energy
5.27 kWh/m²
Travel score
6.5
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 August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 75°F through the month.

A typical August day in Jamestown reaches about 75°F in the afternoon and slips back to 58°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 68°F and 83°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17660
27660
37660
47660
57659
67659
77659
87659
97659
107659
117559
127559
137559
147558
157558
167558
177558
187558
197558
207558
217558
227458
237458
247457
257457
267457
277457
287457
297457
307456
317356

How August really feels in Jamestown

Once humidity and wind are folded in, August 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

August 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 August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
25050
35050
45050
55050
65050
75050
85050
95149
105149
115149
125149
135149
145248
155248
165248
175347
185248
195248
205347
215347
225347
235248
245347
255347
265446
275446
285446
295446
305446
315347

Chance of precipitation in August

Any precipitation

Jamestown gets around 4.3 in of rain over 13.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 48% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
148
248
347
447
547
647
747
847
947
1046
1146
1246
1345
1445
1545
1644
1744
1843
1942
2042
2141
2240
2340
2439
2538
2637
2737
2836
2936
3036
3136

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1162834202
2162834202
3172933202
4172933202
5182932192
6182932192
7192931192
8193031192
9203030192
10203030192
11213029182
12213029182
13213029182
14223029172
15223029172
16223029162
17223030161
18233030161
19233030161
20243030151
21243030151
22252930151
23252930151
24262929151
25272929141
26282829141
27292828141
28302827131
29312827131
30322826131
31332826122

Wind in August

Winds average 6 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
16calm
26calm
36calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 5:14 AM to 5:46 AM, and sunset from 7:32 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:147:32
214.35:157:31
314.25:167:30
414.25:177:29
514.25:187:28
614.15:197:26
714.15:207:25
814.05:217:24
914.05:227:22
1014.05:237:21
1113.95:247:20
1213.95:257:18
1313.85:267:17
1413.85:277:15
1513.85:287:14
1613.75:307:13
1713.75:317:11
1813.65:327:10
1913.65:337:08
2013.55:347:06
2113.55:357:05
2213.55:367:03
2313.45:377:02
2413.45:387:00
2513.35:396:58
2613.35:406:57
2713.25:416:55
2813.25:426:53
2913.15:446:52
3013.15:456:50
3113.05:466:48

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.27 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 — August's 5.27 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Jamestown?

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

6.5
Sightseeing
1st-best month of the year
5.4
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Jamestown for sightseeing.

What to pack for Jamestown in August

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

In August, Jamestown sees daytime highs around 75°F and nights near 58°F. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Jamestown in August

The nearest coast averages about 73°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 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 August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 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
August 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).