New Castle weather in August

In August, New Castle sees average daytime highs of 80°F and overnight lows near 62°F, with 3.7 in of rain across 11 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 80°F through the month. The sky is clear or mostly clear about 32% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is New Castle's 2nd-clearest and 12th-windiest month. For the whole year in context, see New Castle's year-round climate.

Daytime high
80°
2nd warmest
Overnight low
62°
11th coldest
Rainfall
3.7 in
11 wet days
Daylight
13 h 42 min
5:36 AM – 7:15 PM
Cloud cover
56%
2nd clearest
Wind
5 mph
12th windiest
Solar energy
5.24 kWh/m²
Travel score
6.5
out of 10

New Castle is city in and the county seat of Lawrence County, Pennsylvania, United States.

Density
1,012/km²
people per km²
Founded
1802

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 80°F through the month.

A typical August day in New Castle reaches about 80°F in the afternoon and slips back to 62°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 87°F. Set against its neighbours, August runs about 2°F cooler than July and about 6°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18163
28163
38163
48063
58063
68062
78062
88062
98062
108062
118062
128062
138062
148062
158062
168062
177962
187961
197961
207961
217961
227961
237961
247961
257961
267960
277960
287860
297860
307860
317860

How August really feels in New Castle

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.

New Castle weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan35° / 21°3.612.88.69.40.0
Feb38° / 22°2.810.96.610.40.0
Mar47° / 30°4.012.74.411.71.4
Apr60° / 41°4.614.21.513.14.2
May69° / 50°4.414.2014.35.7
Jun77° / 59°4.813.5014.96.2
Jul81° / 63°4.113.3014.66.0
Aug80° / 62°3.711013.66.5
Sep73° / 55°4.010.2012.36.7
Oct61° / 44°3.611.40.210.94.9
Nov49° / 34°3.510.72.39.71.9
Dec39° / 27°3.511.95.79.10.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25347
35446
45446
55446
65446
75446
85446
95446
105347
115248
125248
135248
145248
155248
165248
175248
185248
195248
205347
215248
225347
235446
245347
255446
265545
275545
285545
295545
305644
315644

Chance of precipitation in August

Any precipitation

New Castle gets around 3.7 in of rain over 11 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 36% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
338
438
537
637
737
837
937
1037
1137
1237
1338
1438
1538
1638
1738
1838
1937
2037
2137
2236
2336
2435
2534
2634
2733
2832
2932
3032
3132

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 27% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1112431277
2112531276
3122530276
4122530266
5122630266
6132629266
7132629266
8132729256
9142728256
10142728256
11142827256
12152827256
13152826255
14152926255
15152926255
16152926255
17152926255
18162926255
19162926254
20162926254
21172826254
22172826254
23182826254
24182726253
25192726253
26202726243
27212626243
28222626233
29232626233
30242626223
31252525213

Wind in August

Winds average 5 mph in August, the calmest month.

Across August, 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 August

DaylightNight

Daylight runs from about 14 h 12 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 72 minutes over August. Sunrise moves from 5:21 AM to 5:51 AM, and sunset from 7:34 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:217:34
214.25:227:33
314.15:237:32
414.15:247:31
514.15:257:29
614.05:267:28
714.05:277:27
814.05:287:26
913.95:297:25
1013.95:307:23
1113.95:317:22
1213.85:327:21
1313.85:337:19
1413.75:347:18
1513.75:357:16
1613.75:367:15
1713.65:377:14
1813.65:387:12
1913.55:397:11
2013.55:407:09
2113.45:417:08
2213.45:427:06
2313.45:437:05
2413.35:447:03
2513.35:457:01
2613.25:467:00
2713.25:476:58
2813.15:486:57
2913.15:496:55
3013.05:506:53
3113.05:516:52

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.24 kWh/m².

For context, solar energy here swings from a low near 1.44 kWh/m² to a high of 5.96 kWh/m² in June across the year — August's 5.24 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Is August a good time to visit New Castle?

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

6.5
Sightseeing
2nd-best month of the year
6.3
Beach & pool
1st-best month of the year

August is a reasonable time to visit New Castle for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for New Castle in August

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

In August, New Castle sees daytime highs around 80°F and nights near 62°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in New Castle 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 New Castle peaks around June 22 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 22UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in New Castle in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in New Castle is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Nov 137 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr11Good
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov7Good
Dec8Good
Location & terrain

Where is New Castle?

New Castle sits at 41.0°N, 80.3°W, 853 ft above sea level, in United States. The nearest listed city is Boardman, 17 mi away.

Topography around New Castle

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

Within 2 miles, the terrain around New Castle has only modest variations in elevation — a maximum elevation change of 430 ft around an average of 988 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 732 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,089 ft.

The land around New Castle is covered by trees (56%), grassland (22%) and artificial surfaces (20%) within 2 miles, trees (58%) and grassland (25%) within 10 miles, and trees (69%) within 50 miles.

2 miles
430 ft
10 miles
732 ft
50 miles
1,089 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Boardman 17 mi · Hermitage 17 mi · Youngstown 17 mi · Austintown 23 mi · Niles 25 mi · Cranberry Township 25 mi · Warren 29 mi · Allison Park 37 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 New Castle (41.0037°, -80.347°, elevation 853 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. 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).