Sparta weather in August

In August, Sparta sees average daytime highs of 81°F and overnight lows near 64°F, with 3.6 in of rain across 10.5 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 83°F in the first days to 79°F by the end. The sky is clear or mostly clear about 28% 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 Sparta's 3rd-clearest and 12th-windiest month. For the whole year in context, see Sparta's year-round climate.

Daytime high
81°
2nd warmest
Overnight low
64°
11th coldest
Rainfall
3.6 in
10.5 wet days
Daylight
13 h 42 min
5:13 AM – 6:52 PM
Cloud cover
59%
3rd clearest
Wind
5 mph
12th windiest
Solar energy
5.16 kWh/m²
Travel score
6.3
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 83°F in the first days to 79°F by the end.

A typical August day in Sparta reaches about 81°F in the afternoon and slips back to 64°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 89°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18365
28365
38365
48265
58265
68265
78265
88265
98265
108265
118265
128265
138164
148164
158164
168164
178164
188164
198164
208063
218063
228063
238063
248063
258063
268062
278062
288062
297962
307962
317961

How August really feels in Sparta

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.

Sparta weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan36° / 22°3.59.55.69.40.0
Feb39° / 23°3.08.84.610.40.0
Mar47° / 31°4.110.94.111.71.5
Apr59° / 41°3.710.80.713.14.4
May69° / 51°3.711.7014.36.1
Jun78° / 60°3.911.3014.96.4
Jul83° / 65°3.710.7014.65.7
Aug81° / 64°3.610.5013.66.3
Sep74° / 56°4.29.6012.36.9
Oct62° / 45°4.090.210.95.4
Nov50° / 35°3.28.319.72.5
Dec40° / 28°4.01049.10.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44753
54753
64753
74654
84654
94654
104654
114654
124654
134654
144753
154753
164852
174852
184852
194852
204951
214951
225050
235149
245149
255149
265149
275149
285248
295248
305248
315248

Chance of precipitation in August

Any precipitation

Sparta gets around 3.6 in of rain over 10.5 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 34% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
435
536
636
736
837
937
1037
1138
1238
1338
1438
1538
1638
1737
1837
1936
2035
2134
2233
2332
2431
2530
2629
2729
2828
2928
3028
3127

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 26% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1162030268
2172029268
3172029258
4172029258
5182028258
6182028258
7182028258
8182027268
9192127268
10192127268
11192127267
12192127267
13202127267
14202227257
15202227256
16202227256
17202327246
18212426246
19212426235
20222426235
21222526225
22232526224
23242525214
24252525204
25262624204
26272624194
27282624194
28292623184
29292623184
30302622174
31312622174

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 4:58 AM to 5:28 AM, and sunset from 7:11 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.24:587:11
214.24:597:10
314.25:007:09
414.15:017:08
514.15:027:07
614.05:037:06
714.05:047:04
814.05:057:03
913.95:067:02
1013.95:077:00
1113.95:086:59
1213.85:096:58
1313.85:106:56
1413.75:116:55
1513.75:126:54
1613.75:136:52
1713.65:146:51
1813.65:156:49
1913.55:166:48
2013.55:176:46
2113.45:186:45
2213.45:196:43
2313.45:206:42
2413.35:216:40
2513.35:226:39
2613.25:236:37
2713.25:246:35
2813.15:256:34
2913.15:266:32
3013.15:276:30
3113.05:286:29

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.16 kWh/m².

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 5.96 kWh/m² in June across the year — August's 5.16 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in August

Hazard calendar for Sparta

In seasonPeak

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

Sparta 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 August a good time to visit Sparta?

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

6.3
Sightseeing
3rd-best month of the year
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Sparta in August

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

In August, Sparta sees daytime highs around 81°F and nights near 64°F. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Sparta in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sparta peaks around July 11 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateLowJul 11UV 8Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Sparta 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 Sparta is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Nov 157 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar12Good
Apr12Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug13Moderate
Sep11Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Sparta?

Sparta sits at 41.0°N, 74.6°W, 748 ft above sea level, in United States. The nearest listed city is Hopatcong Hills, 6.2 mi away.

Topography around Sparta

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

Within 2 miles, the terrain around Sparta has only modest variations in elevation — a maximum elevation change of 745 ft around an average of 899 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,079 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,530 ft.

The land around Sparta is covered by trees (76%) within 2 miles, trees (80%) within 10 miles, and trees (75%) within 50 miles.

2 miles
745 ft
10 miles
1,079 ft
50 miles
2,530 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Hopatcong Hills 6.2 mi · Dover 11 mi · Denville 13 mi · Randolph 13 mi · West Milford 16 mi · Parsippany 16 mi · Morristown 18 mi · Wayne 21 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 Sparta (41.0334°, -74.6385°, elevation 748 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). 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).