Henderson weather in August

In August, Henderson sees average daytime highs of 86°F and overnight lows near 69°F, with 2.9 in of rain across 8.4 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 86°F through the month. The sky is clear or mostly clear about 42% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Henderson's 3rd-clearest and 12th-windiest month. For the whole year in context, see Henderson's year-round climate.

Daytime high
86°
2nd warmest
Overnight low
69°
11th coldest
Rainfall
2.9 in
8.4 wet days
Daylight
13 h 30 min
5:10 AM – 6:39 PM
Cloud cover
51%
3rd clearest
Wind
5 mph
12th windiest
Solar energy
5.77 kWh/m²
Travel score
5.2
out of 10

Henderson is city in and county seat of Henderson County, Kentucky, United States.

Density
624/km²
people per km²
Founded
1797

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 86°F through the month.

A typical August day in Henderson reaches about 86°F in the afternoon and slips back to 69°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 93°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.

60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18771
28770
38770
48770
58770
68770
78770
88770
98770
108770
118669
128669
138669
148669
158669
168669
178669
188669
198669
208669
218669
228669
238669
248668
258668
268668
278668
288668
298668
308567
318567

How August really feels in Henderson

Once humidity and wind are folded in, August averages 3 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
3
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Henderson weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan43° / 28°3.79.52.29.70.4
Feb47° / 31°3.492.410.51.5
Mar57° / 39°4.511.6111.73.9
Apr68° / 49°5.112.10.112.95.9
May77° / 59°4.612.70146.3
Jun85° / 68°3.711.3014.65.3
Jul87° / 71°3.39.7014.44.7
Aug86° / 69°2.98.4013.55.2
Sep81° / 61°3.47.7012.36.8
Oct69° / 49°3.67.80.1116.9
Nov56° / 39°3.890.6103.9
Dec46° / 31°4.210.11.89.41.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
35941
45941
55941
65941
75941
85941
95842
105842
115743
125743
135743
145743
155743
165842
175842
185842
195842
205941
215941
225941
235842
245842
255842
265941
275941
285941
295941
306040
316040

Chance of precipitation in August

Any precipitation

Henderson gets around 2.9 in of rain over 8.4 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 27% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
530
630
730
829
929
1029
1129
1229
1329
1428
1528
1627
1727
1826
1926
2026
2125
2225
2325
2425
2525
2625
2725
2825
2925
3025
3125

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 62% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12122128343
22122129333
32122129333
43122229323
53122229323
63122229323
73122229323
83122229313
94122229313
104122129313
114122129313
124122130303
134122130303
144122130293
154122230293
164132231283
174132231283
184122232282
194122232272
204122232272
214122232272
224122233281
234122232281
245122232281
255122232281
265132232271
275132232270
286142232260
296142232260
307152232250
317162231240

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 hours 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 66 minutes over August. Sunrise moves from 4:57 AM to 5:24 AM, and sunset from 6:56 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:576:56
213.94:586:55
313.94:596:54
413.95:006:53
513.95:016:52
613.85:016:51
713.85:026:49
813.85:036:48
913.75:046:47
1013.75:056:46
1113.75:066:45
1213.65:076:44
1313.65:086:42
1413.55:086:41
1513.55:096:40
1613.55:106:39
1713.45:116:37
1813.45:126:36
1913.45:136:35
2013.35:146:33
2113.35:156:32
2213.25:166:31
2313.25:166:29
2413.25:176:28
2513.15:186:26
2613.15:196:25
2713.15:206:23
2813.05:216:22
2913.05:226:20
3012.95:236:19
3112.95:246:17

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.77 kWh/m².

For context, solar energy here swings from a low near 1.88 kWh/m² to a high of 6.42 kWh/m² in June across the year — August's 5.77 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.0Intense
56.0Intense
66.0Bright
76.0Bright
85.9Bright
95.9Bright
105.9Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.6Bright
225.6Bright
235.6Bright
245.5Bright
255.5Bright
265.5Bright
275.4Bright
285.4Bright
295.4Bright
305.3Bright
315.3Bright
Planning a trip in August

Hazard calendar for Henderson

In seasonPeak

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

Henderson 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 Henderson?

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

5.2
Sightseeing
6th-best month of the year
7.2
Beach & pool
1st-best month of the year

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

What to pack for Henderson in August

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

In August, Henderson sees daytime highs around 86°F and nights near 69°F. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Henderson 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 Henderson peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 11UV 9Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Henderson 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 Henderson is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1420 µg/m³Nov 139 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb12Good
Mar13Moderate
Apr12Moderate
May16Moderate
Jun18Moderate
Jul20Moderate
Aug16Moderate
Sep13Moderate
Oct9Good
Nov9Good
Dec9Good
Location & terrain

Where is Henderson?

Henderson sits at 37.8°N, 87.6°W, 407 ft above sea level, in United States. The nearest listed city is Evansville, 9.9 mi away.

Topography around Henderson

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

Within 2 miles, the terrain around Henderson has only modest variations in elevation — a maximum elevation change of 177 ft around an average of 384 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 269 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 961 ft.

The land around Henderson is covered by cropland (30%) and trees (24%) within 2 miles, cropland (54%) and trees (27%) within 10 miles, and cropland (48%) and trees (40%) within 50 miles.

2 miles
177 ft
10 miles
269 ft
50 miles
961 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Evansville 9.9 mi · Owensboro 26 mi · Madisonville 35 mi · Jasper 52 mi · Vincennes 58 mi · Hopkinsville 67 mi · Marion 74 mi · Paducah 76 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 Henderson (37.8362°, -87.59°, elevation 407 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).