Ilchester weather in August

In August, Ilchester sees average daytime highs of 84°F and overnight lows near 69°F, with 3.7 in of rain across 10.9 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 85°F in the first days to 83°F by the end. The sky is clear or mostly clear about 30% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Ilchester's 4th-clearest and 12th-windiest month. For the whole year in context, see Ilchester's year-round climate.

Daytime high
84°
2nd warmest
Overnight low
69°
11th coldest
Rainfall
3.7 in
10.9 wet days
Daylight
13 h 36 min
5:25 AM – 6:58 PM
Cloud cover
57%
4th clearest
Wind
5 mph
12th windiest
Solar energy
5.31 kWh/m²
Travel score
5.4
out of 10

Ilchester is unincorporated community in Howard County, Maryland, United States.

Density
839/km²
people per km²
Founded
1761

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 85°F in the first days to 83°F by the end.

A typical August day in Ilchester reaches about 84°F in the afternoon and slips back to 69°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 92°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18670
28670
38570
48570
58570
68570
78570
88570
98569
108569
118569
128569
138569
148469
158469
168469
178469
188468
198468
208468
218468
228368
238368
248368
258367
268367
278367
288367
298367
308267
318266

How August really feels in Ilchester

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.

Ilchester 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
Jan42° / 28°3.18.539.60.2
Feb44° / 29°2.98.53.210.50.9
Mar53° / 36°4.010.32.211.73.0
Apr64° / 47°3.510.30.2135.7
May73° / 56°3.811.4014.16.5
Jun82° / 65°3.711.6014.75.8
Jul86° / 70°4.212.1014.54.7
Aug84° / 69°3.710.9013.55.4
Sep78° / 61°4.69.1012.36.9
Oct66° / 50°3.680116.4
Nov55° / 39°3.07.60.29.83.8
Dec46° / 32°3.791.79.31.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25149
35149
45149
55248
65248
75248
85248
95149
105248
115248
125248
135347
145347
155347
165347
175446
185446
195545
205545
215545
225545
235545
245545
255545
265545
275446
285446
295446
305446
315446

Chance of precipitation in August

Any precipitation

Ilchester gets around 3.7 in of rain over 10.9 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 36% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
239
339
438
538
638
738
838
939
1039
1139
1239
1339
1439
1538
1638
1737
1837
1936
2035
2134
2233
2333
2432
2531
2631
2731
2831
2931
3031
3131

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 54% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
16112236250
27112236250
37112136240
47112136240
58122135240
68122135240
78112135240
89112136230
99112136230
109112136220
119112136220
129112136220
139112237210
149112236210
159122236200
169122336200
179122336190
189132436190
199132436180
209142435180
219142535170
229142534170
239152534160
2410152533160
2510162632160
2611162631161
2712172629161
2813172528161
2913182528151
3014182527151
3115192426151

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 6 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
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:11 AM to 5:39 AM, and sunset from 7:16 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:117:16
214.05:127:15
314.05:127:13
414.05:137:12
513.95:147:11
613.95:157:10
713.95:167:09
813.85:177:08
913.85:187:07
1013.85:197:05
1113.75:207:04
1213.75:217:03
1313.75:227:02
1413.65:237:00
1513.65:246:59
1613.65:256:58
1713.55:266:56
1813.55:276:55
1913.45:276:54
2013.45:286:52
2113.45:296:51
2213.35:306:49
2313.35:316:48
2413.25:326:46
2513.25:336:45
2613.25:346:43
2713.15:356:42
2813.15:366:40
2913.05:376:39
3013.05:386:37
3112.95:396:35

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.31 kWh/m².

For context, solar energy here swings from a low near 1.92 kWh/m² to a high of 6.11 kWh/m² in June across the year — August's 5.31 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in August

Hazard calendar for Ilchester

In seasonPeak

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

Ilchester 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 Ilchester?

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

5.4
Sightseeing
6th-best month of the year
6.8
Beach & pool
1st-best month of the year

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

What to pack for Ilchester in August

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

In August, Ilchester sees daytime highs around 84°F and nights near 69°F. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Ilchester in August

The nearest coast averages about 78°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 22 mi away) is warmest in August at about 78°F and coldest in February near 36°F.

It's comfortable for a long swim from Jun 16 to Oct 5 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar40Bracing
Apr47Bracing
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov53Bracing
Dec44Bracing

UV index in Ilchester 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 Ilchester peaks around July 10 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 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 9Dec 19UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Ilchester 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 Ilchester is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Nov 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec10Good
Location & terrain

Where is Ilchester?

Ilchester sits at 39.3°N, 76.8°W, 108 ft above sea level, in United States. The nearest listed city is Ellicott City, 1.9 mi away.

Topography around Ilchester

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

Within 2 miles, the terrain around Ilchester has only modest variations in elevation — a maximum elevation change of 518 ft around an average of 390 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 735 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,031 ft.

The land around Ilchester is covered by trees (83%) within 2 miles, trees (61%) and artificial surfaces (25%) within 10 miles, and trees (54%) within 50 miles.

2 miles
518 ft
10 miles
735 ft
50 miles
2,031 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Ellicott City 1.9 mi · Catonsville 2.5 mi · Arbutus 3.7 mi · West Elkridge 3.7 mi · Elkridge 3.7 mi · Columbia 4.3 mi · Hanover 4.3 mi · Woodlawn 5.6 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 Ilchester (39.2509°, -76.7647°, elevation 108 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). 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).