Marion weather in August

In August, Marion sees average daytime highs of 81°F and overnight lows near 63°F, with 3.0 in of rain across 10.1 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 36% of the time in August, and the air most often feels muggy.

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 Marion's 2nd-clearest and 12th-windiest month. For the whole year in context, see Marion's year-round climate.

Daytime high
81°
2nd warmest
Overnight low
63°
11th coldest
Rainfall
3.0 in
10.1 wet days
Daylight
13 h 36 min
5:48 AM – 7:25 PM
Cloud cover
54%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
5.5 kWh/m²
Travel score
6.5
out of 10

Marion is county seat of Marion County, Ohio, United States.

Density
1,185/km²
people per km²
Founded
1822

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 81°F through the month.

A typical August day in Marion reaches about 81°F in the afternoon and slips back to 63°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 88°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)
18264
28264
38264
48264
58264
68264
78264
88164
98164
108164
118164
128163
138163
148163
158163
168163
178163
188163
198163
208163
218163
228163
238062
248062
258062
268062
278062
288062
298062
308061
318061

How August really feels in Marion

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.

Marion 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
Jan35° / 21°3.010.85.89.40.0
Feb38° / 23°2.59.1510.40.0
Mar49° / 31°3.611.23.111.71.8
Apr61° / 42°4.412.50.9134.7
May71° / 52°4.313.7014.26.0
Jun79° / 61°4.112.2014.86.2
Jul82° / 65°3.511.2014.66.1
Aug81° / 63°3.010.1013.66.5
Sep75° / 56°2.88.9012.37.0
Oct63° / 45°2.89.30.210.95.6
Nov50° / 35°3.19.31.29.72.3
Dec39° / 26°3.19.93.89.20.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25743
35743
45743
55842
65743
75743
85644
95644
105644
115644
125644
135743
145743
155644
165743
175743
185743
195743
205743
215743
225743
235743
245743
255842
265842
275842
285941
295842
305842
315842

Chance of precipitation in August

Any precipitation

Marion gets around 3.0 in of rain over 10.1 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 33% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
334
434
534
634
734
834
935
1035
1135
1235
1335
1435
1535
1635
1734
1834
1933
2033
2133
2232
2332
2431
2531
2630
2730
2829
2929
3029
3129

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 26% of days. Sticky, muggy-or-worse air turns up on roughly 34% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11022302710
21023302710
31123302610
41123302610
51223302610
61223292610
71323292510
81423282510
91423282510
101523272510
11152327259
12162326259
13162326269
14162326269
15162326268
16162326268
17162426277
18172426277
19172426277
20172426286
21172425286
22172425286
23172425286
24182425286
25182424285
26192424285
27202424275
28212423275
29222423265
30232423265
31242422255

Wind in August

Winds average 6 mph in August, the calmest month.

Across August, 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 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 5:33 AM to 6:03 AM, and sunset from 7:44 PM to 7:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:337:44
214.25:347:43
314.15:357:42
414.15:367:41
514.05:377:40
614.05:387:38
714.05:397:37
813.95:407:36
913.95:417:35
1013.95:427:34
1113.85:437:32
1213.85:447:31
1313.75:457:30
1413.75:467:28
1513.75:477:27
1613.65:487:25
1713.65:497:24
1813.55:507:23
1913.55:517:21
2013.55:527:20
2113.45:537:18
2213.45:547:17
2313.35:557:15
2413.35:567:13
2513.35:577:12
2613.25:587:10
2713.25:597:09
2813.16:007:07
2913.16:017:06
3013.06:027:04
3113.06:037:02

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.5 kWh/m².

For context, solar energy here swings from a low near 1.61 kWh/m² to a high of 6.24 kWh/m² in June across the year — August's 5.5 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.6Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.4Bright
195.4Bright
205.4Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.2Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.1Bright
315.0Bright
Planning a trip in August

Is August a good time to visit Marion?

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
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Marion in August

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

In August, Marion sees daytime highs around 81°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

UV index in Marion in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Marion peaks around June 20 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 20UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Marion 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 Marion is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar12Moderate
Apr12Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Marion?

Marion sits at 40.6°N, 83.1°W, 981 ft above sea level, in United States. The nearest listed city is Delaware, 21 mi away.

Topography around Marion

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

Within 2 miles, the terrain around Marion has only modest variations in elevation — a maximum elevation change of 148 ft around an average of 971 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 207 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,033 ft.

The land around Marion is covered by artificial surfaces (32%), trees (28%) and grassland (22%) within 2 miles, cropland (71%) within 10 miles, and cropland (61%) and trees (23%) within 50 miles.

2 miles
148 ft
10 miles
207 ft
50 miles
1,033 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Delaware 21 mi · Marysville 27 mi · Westerville 34 mi · Dublin 34 mi · Mansfield 34 mi · Mount Vernon 37 mi · Tiffin 37 mi · Hilliard 39 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 Marion (40.5887°, -83.1285°, elevation 981 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).