Norwalk weather in August

In August, Norwalk sees average daytime highs of 79°F and overnight lows near 65°F, with 3.5 in of rain across 11.2 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 79°F through the month. The sky is clear or mostly clear about 39% 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 Norwalk's 2nd-clearest and 12th-windiest month. For the whole year in context, see Norwalk's year-round climate.

Daytime high
79°
2nd warmest
Overnight low
65°
11th coldest
Rainfall
3.5 in
11.2 wet days
Daylight
13 h 42 min
5:45 AM – 7:25 PM
Cloud cover
53%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
5.57 kWh/m²
Travel score
6.6
out of 10

Norwalk is city in and the county seat of Huron County, Ohio, United States.

Density
710/km²
people per km²
Founded
1817

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 79°F through the month.

A typical August day in Norwalk reaches about 79°F in the afternoon and slips back to 65°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 86°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)
18067
28067
38067
48067
58067
68066
78066
87966
97966
107966
117966
127966
137966
147966
157965
167965
177965
187965
197965
207965
217865
227865
237865
247865
257865
267864
277864
287864
297864
307864
317763

How August really feels in Norwalk

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.

Norwalk 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
Jan33° / 22°3.311.77.39.40.0
Feb36° / 23°2.69.85.810.30.0
Mar44° / 30°3.511.34.311.70.8
Apr57° / 42°4.313.11.213.13.6
May68° / 53°4.213.4014.35.7
Jun77° / 63°4.212.9014.96.3
Jul81° / 67°3.612014.76.3
Aug79° / 65°3.511.2013.76.6
Sep73° / 58°3.19.7012.36.9
Oct61° / 47°3.210.90.110.95.0
Nov49° / 37°3.410.81.99.71.8
Dec38° / 28°3.411.15.39.10.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35941
45941
55842
65941
75941
85842
95842
105842
115842
125842
135842
145842
156040
166040
176040
186040
196040
206040
216040
226040
236040
246040
256040
266139
276139
286139
296139
306139
316238

Chance of precipitation in August

Any precipitation

Norwalk gets around 3.5 in of rain over 11.2 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
437
537
637
737
837
938
1038
1138
1238
1338
1438
1538
1638
1738
1838
1937
2037
2137
2236
2335
2435
2534
2634
2733
2833
2933
3032
3132

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 36% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1822293110
2822283110
3922283010
4923283010
5923283010
6923273010
71024272910
81024272910
91024272910
101024272810
111125272810
121125272810
13112527279
14112527279
15112528279
16112528278
17112528278
18112528278
19122529277
20122529277
21122529277
22122429287
23132429277
24132429286
25142428276
26152428276
27152527276
28162526266
29172526266
30182626256
31192625246

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257light breeze
267light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

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 5:29 AM to 6:00 AM, and sunset from 7:44 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:297:44
214.25:307:43
314.25:317:41
414.15:327:40
514.15:337:39
614.15:347:38
714.05:357:37
814.05:367:35
913.95:377:34
1013.95:387:33
1113.95:397:31
1213.85:407:30
1313.85:417:29
1413.75:437:27
1513.75:447:26
1613.75:457:25
1713.65:467:23
1813.65:477:22
1913.55:487:20
2013.55:497:19
2113.55:507:17
2213.45:517:16
2313.45:527:14
2413.35:537:12
2513.35:547:11
2613.25:557:09
2713.25:567:08
2813.15:577:06
2913.15:587:04
3013.15:597:03
3113.06:007:01

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.57 kWh/m².

For context, solar energy here swings from a low near 1.51 kWh/m² to a high of 6.42 kWh/m² in June across the year — August's 5.57 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
36.0Bright
45.9Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.6Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.4Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.2Bright
285.2Bright
295.1Bright
305.1Bright
315.0Bright
Planning a trip in August

Is August a good time to visit Norwalk?

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

6.6
Sightseeing
2nd-best month of the year
6.3
Beach & pool
2nd-best month of the year

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

What to pack for Norwalk in August

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

In August, Norwalk sees daytime highs around 79°F and nights near 65°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Norwalk in August

The nearest coast averages about 75°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 27 mi away) is warmest in August at about 75°F and coldest in February near 33°F.

It's comfortable for a long swim from Jun 21 to Sep 23 — about 3.1 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan34Bracing
Feb33Bracing
Mar35Bracing
Apr42Bracing
May54Bracing
Jun67Cool
Jul75Refreshing
Aug75Warm
Sep71Refreshing
Oct60Cool
Nov48Bracing
Dec39Bracing

UV index in Norwalk 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 Norwalk peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highHighModerateLowJun 19UV 9Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Very high
Jul9Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Norwalk 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 Norwalk is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1016 µg/m³Oct 248 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Norwalk?

Norwalk sits at 41.2°N, 82.6°W, 719 ft above sea level, in United States. The nearest listed city is Sandusky, 15 mi away.

Topography around Norwalk

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

Within 2 miles, the terrain around Norwalk has only modest variations in elevation — a maximum elevation change of 253 ft around an average of 735 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 528 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,102 ft.

The land around Norwalk is covered by trees (44%) and grassland (21%) within 2 miles, cropland (63%) and trees (24%) within 10 miles, and cropland (40%), water (27%) and trees (21%) within 50 miles.

2 miles
253 ft
10 miles
528 ft
50 miles
1,102 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Sandusky 15 mi · Lorain 27 mi · Fremont 27 mi · Elyria 28 mi · Ashland 30 mi · Tiffin 30 mi · North Ridgeville 32 mi · Avon 34 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 Norwalk (41.2426°, -82.6157°, elevation 719 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. 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).