Yorkville weather in August

In August, Yorkville sees average daytime highs of 80°F and overnight lows near 63°F, with 3.5 in of rain across 9.9 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 80°F through the month. The sky is clear or mostly clear about 37% 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 Yorkville's 2nd-clearest and 12th-windiest month. For the whole year in context, see Yorkville's year-round climate.

Daytime high
80°
2nd warmest
Overnight low
63°
11th coldest
Rainfall
3.5 in
9.9 wet days
Daylight
13 h 42 min
5:07 AM – 6:49 PM
Cloud cover
54%
2nd clearest
Wind
6 mph
12th windiest
Solar energy
5.43 kWh/m²
Travel score
6.6
out of 10

Yorkville is city in and county seat of Kendall County, Illinois, United States.

Density
348/km²
people per km²
Founded
1833

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 Yorkville reaches about 80°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
38164
48164
58164
68164
78164
88164
98164
108163
118163
128163
138063
148063
158063
168063
178063
188063
198063
208063
218062
228062
238062
248062
258062
268062
278062
288062
298061
307961
317961

How August really feels in Yorkville

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.

Yorkville 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
Jan30° / 17°2.17.95.79.30.0
Feb35° / 20°1.974.610.30.0
Mar47° / 30°2.69.62.811.71.5
Apr59° / 40°4.512.30.913.14.3
May70° / 51°4.712.7014.36.0
Jun79° / 61°4.211.80156.3
Jul82° / 65°3.710.9014.76.1
Aug80° / 63°3.59.9013.76.6
Sep74° / 55°3.18.5012.37.1
Oct62° / 43°3.29.20.110.95.3
Nov47° / 32°2.58.11.39.71.7
Dec36° / 22°2.27.94.390.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55743
65743
75644
85644
95644
105545
115545
125545
135644
145644
155545
165545
175545
185545
195446
205446
215446
225446
235446
245545
255545
265644
275644
285743
295842
305941
315941

Chance of precipitation in August

Any precipitation

Yorkville gets around 3.5 in of rain over 9.9 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 31% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
332
431
531
631
730
830
930
1030
1130
1230
1331
1431
1531
1632
1732
1832
1933
2033
2133
2233
2333
2433
2532
2632
2731
2831
2930
3030
3129

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 36% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
110242627131
210242626131
310242626131
410252625141
510252624141
611252624141
711252723141
811252723131
912252723130
1012252723130
1113252723130
1213252723130
1313252723120
1413242723120
1513242723120
1614242724120
1714242724110
1814232725110
1914232725110
2014232626110
2114232626110
2214232627100
2314242527100
2414242526100
2514252526100
2615252426100
2715262425100
2816262425100
291726232490
301827232390
311928232280

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 7 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
277calm
287calm
297calm
307calm
317calm

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 4:52 AM to 5:23 AM, and sunset from 7:08 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:527:08
214.24:537:07
314.24:547:06
414.24:557:05
514.14:567:03
614.14:577:02
714.14:587:01
814.04:597:00
914.05:006:58
1013.95:016:57
1113.95:026:56
1213.95:036:54
1313.85:046:53
1413.85:056:51
1513.75:066:50
1613.75:076:49
1713.65:086:47
1813.65:096:46
1913.65:106:44
2013.55:116:43
2113.55:126:41
2213.45:146:39
2313.45:156:38
2413.35:166:36
2513.35:176:35
2613.35:186:33
2713.25:196:31
2813.25:206:30
2913.15:216:28
3013.15:226:26
3113.05:236:25

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.43 kWh/m².

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 6.28 kWh/m² in June across the year — August's 5.43 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.8Bright
45.8Bright
55.8Bright
65.7Bright
75.7Bright
85.7Bright
95.6Bright
105.6Bright
115.6Bright
125.5Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.0Bright
315.0Bright
Planning a trip in August

Is August a good time to visit Yorkville?

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
6.7
Beach & pool
1st-best month of the year

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

What to pack for Yorkville in August

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

In August, Yorkville sees daytime highs around 80°F and nights near 63°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Yorkville 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 Yorkville peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 20UV 9Dec 19UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Yorkville 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 Yorkville is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 1817 µg/m³Oct 229 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar16Moderate
Apr14Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug16Moderate
Sep13Moderate
Oct9Good
Nov10Good
Dec11Good
Location & terrain

Where is Yorkville?

Yorkville sits at 41.6°N, 88.4°W, 607 ft above sea level, in United States. The nearest listed city is Oswego, 5.6 mi away.

Topography around Yorkville

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

Within 2 miles, the terrain around Yorkville has only modest variations in elevation — a maximum elevation change of 276 ft around an average of 653 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 318 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 751 ft.

The land around Yorkville is covered by trees (37%), cropland (24%) and grassland (21%) within 2 miles, cropland (64%) within 10 miles, and cropland (58%) within 50 miles.

2 miles
276 ft
10 miles
318 ft
50 miles
751 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Oswego 5.6 mi · Montgomery 8.1 mi · Aurora 11 mi · Plainfield 12 mi · North Aurora 13 mi · Shorewood 15 mi · Batavia 16 mi · Naperville 19 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 Yorkville (41.6411°, -88.4473°, elevation 607 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).