Johnson City weather in August

In August, Johnson City sees average daytime highs of 79°F and overnight lows near 63°F, with 3.8 in of rain across 14 wet days and about 13.4 hours of daylight. It is the 2nd-warmest and 9th-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 28% of the time in August, and the air most often feels humid.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Johnson City's 4th-clearest and 12th-windiest month. For the whole year in context, see Johnson City's year-round climate.

Daytime high
79°
2nd warmest
Overnight low
63°
11th coldest
Rainfall
3.8 in
14 wet days
Daylight
13 h 24 min
5:52 AM – 7:15 PM
Cloud cover
58%
4th clearest
Wind
3 mph
12th windiest
Solar energy
5.39 kWh/m²
Travel score
6.0
out of 10

Johnson City is city in Washington, Carter, and Sullivan counties in Tennessee, United States.

Density
589/km²
people per km²
Founded
1856

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 Johnson City reaches about 79°F in the afternoon and slips back to 63°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 85°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
18064
28064
38064
48064
58064
68064
77964
87964
97964
107964
117964
127964
137964
147964
157963
167963
177963
187963
197963
207963
217963
227963
237963
247963
257962
267962
277962
287862
297862
307862
317861

How August really feels in Johnson City

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.

Johnson City 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
Jan44° / 28°4.3134.99.80.6
Feb47° / 30°3.812.34.810.61.4
Mar55° / 36°4.813.63.411.73.3
Apr64° / 45°4.4131.212.95.4
May71° / 53°4.214.4013.95.9
Jun77° / 61°4.216.4014.45.8
Jul80° / 64°4.217014.25.5
Aug79° / 63°3.814013.46.0
Sep74° / 57°3.610.4012.26.8
Oct65° / 46°3.09.40.311.16.1
Nov55° / 36°3.49.81.210.13.5
Dec47° / 31°4.211.73.89.61.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 24% of August, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35050
45050
55050
65149
75149
85050
95050
105050
115050
125050
135149
145149
155149
165248
175248
185347
195347
205347
215347
225347
235347
245446
255446
265446
275446
285446
295545
305545
315545

Chance of precipitation in August

Any precipitation

Johnson City gets around 3.8 in of rain over 14 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 46% and peaks near 53% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
153
253
352
452
551
650
750
850
949
1049
1149
1248
1348
1448
1547
1646
1745
1844
1944
2043
2143
2242
2342
2442
2542
2642
2742
2842
2942
3042
3141

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 44% 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 (%)
151241420
251341410
351342400
451442400
551442390
651442380
751542380
851542381
951542381
1051641381
1151641371
1251641371
1351641371
1451642371
1551642361
1651742351
1751743341
1861744331
1961745321
2061745311
2161746301
2261747300
2371747290
2471748280
2581748280
2681747270
2791847260
28101847260
29101946250
30112045240
31122044230

Wind in August

Winds average 3 mph in August, the calmest month.

Across August, daily wind ranges from about 3 mph on the calmest days to 3 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm
313calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 48 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 5:39 AM to 6:04 AM, and sunset from 7:31 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:397:31
213.85:407:31
313.85:417:30
413.85:427:29
513.75:437:28
613.75:437:27
713.75:447:26
813.75:457:25
913.65:467:23
1013.65:477:22
1113.65:487:21
1213.55:487:20
1313.55:497:19
1413.55:507:18
1513.45:517:17
1613.45:527:15
1713.45:537:14
1813.35:537:13
1913.35:547:11
2013.35:557:10
2113.25:567:09
2213.25:577:08
2313.15:577:06
2413.15:587:05
2513.15:597:03
2613.06:007:02
2713.06:017:01
2813.06:026:59
2912.96:026:58
3012.96:036:56
3112.86:046:55

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.39 kWh/m².

For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 6.06 kWh/m² in June across the year — August's 5.39 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
105.5Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in August

Is August a good time to visit Johnson City?

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

6.0
Sightseeing
3rd-best month of the year
5.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Johnson City for sightseeing.

What to pack for Johnson City in August

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

In August, Johnson City sees daytime highs around 79°F and nights near 63°F. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

UV index in Johnson City in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Johnson City peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 13UV 10Dec 20UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Johnson City 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 Johnson City is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1618 µg/m³Dec 217 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar10Good
Apr11Good
May13Moderate
Jun16Moderate
Jul18Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is Johnson City?

Johnson City sits at 36.3°N, 82.4°W, 1,634 ft above sea level, in United States. The nearest listed city is Kingsport, 20 mi away.

Topography around Johnson City

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

Within 2 miles, the terrain around Johnson City has only modest variations in elevation — a maximum elevation change of 607 ft around an average of 1,719 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,418 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,682 ft.

The land around Johnson City is covered by trees (46%), grassland (27%) and artificial surfaces (27%) within 2 miles, trees (59%) and grassland (35%) within 10 miles, and trees (78%) and grassland (20%) within 50 miles.

2 miles
607 ft
10 miles
2,418 ft
50 miles
5,682 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Kingsport 20 mi · Bristol 22 mi · Bristol 22 mi · Greeneville 29 mi · Boone 39 mi · Asheville 50 mi · Morristown 53 mi · Lenoir 53 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 Johnson City (36.3134°, -82.3535°, elevation 1,634 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).