Boone weather in September

In September, Boone sees average daytime highs of 71°F and overnight lows near 55°F, with 4.6 in of rain across 11.5 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 74°F in the first days to 68°F by the end. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Boone's 3rd-clearest and 10th-windiest month. For the whole year in context, see Boone's year-round climate.

Daytime high
71°
4th warmest
Overnight low
55°
9th coldest
Rainfall
4.6 in
11.5 wet days
Daylight
12 h 12 min
6:14 AM – 6:28 PM
Cloud cover
57%
3rd clearest
Wind
4 mph
10th windiest
Solar energy
4.5 kWh/m²
Travel score
6.4
out of 10

Boone is town in North Carolina, United States.

Density
1,140/km²
people per km²
Founded
1872

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 74°F in the first days to 68°F by the end.

A typical September day in Boone reaches about 71°F in the afternoon and slips back to 55°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 78°F. Set against its neighbours, September runs about 5°F cooler than August and about 9°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17459
27459
37458
47458
57458
67458
77357
87357
97357
107356
117256
127256
137256
147255
157155
167155
177154
187154
197054
207053
217053
226953
236953
246952
256852
266851
276851
286751
296750
306750

How September really feels in Boone

Once humidity and wind are folded in, September 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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Boone weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan41° / 25°4.511.74.89.80.1
Feb44° / 28°3.7114.610.60.8
Mar52° / 34°4.912.93.311.72.7
Apr62° / 43°4.812.61.312.94.8
May68° / 51°4.8150.113.95.5
Jun74° / 58°5.216.6014.45.7
Jul77° / 62°5.217.5014.25.7
Aug76° / 61°5.115.8013.46.0
Sep71° / 55°4.611.5012.26.4
Oct62° / 44°3.58.60.311.15.6
Nov52° / 34°3.69.31.110.12.9
Dec44° / 29°4.210.53.59.60.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24951
35050
44951
55050
65149
75149
85149
95149
105149
115050
125149
135050
145050
154951
164951
174852
184852
194852
204852
214852
224852
234951
245149
255248
265248
275347
285446
295446
305545

Chance of precipitation in September

Any precipitation

Boone gets around 4.6 in of rain over 11.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 45% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
145
245
344
443
543
642
741
840
939
1038
1138
1237
1336
1436
1536
1636
1736
1836
1936
2036
2136
2236
2336
2435
2534
2634
2733
2832
2932
3031

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
119284310
220294110
32229409
42429389
52630368
62830357
72931337
83131316
93332305
103532285
113633274
123733264
133934253
144034243
154134233
164234222
174334212
184434202
194534192
204634192
214733181
224933171
235032171
245330161
255529151
265628151
275827141
286025141
296224131
306423121

Wind in September

Winds average 4 mph in September.

Across September, daily wind ranges from about 4 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:02 AM to 6:26 AM, and sunset from 6:51 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:026:51
212.86:036:49
312.76:046:48
412.76:056:46
512.76:056:45
612.66:066:43
712.66:076:42
812.56:086:40
912.56:096:39
1012.56:096:37
1112.46:106:36
1212.46:116:34
1312.36:126:32
1412.36:136:31
1512.36:136:29
1612.26:146:28
1712.26:156:26
1812.16:166:25
1912.16:176:23
2012.16:176:22
2112.06:186:20
2212.06:196:19
2312.06:206:17
2411.96:216:15
2511.96:226:14
2611.86:226:12
2711.86:236:11
2811.86:246:09
2911.76:256:08
3011.76:266:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.5 kWh/m².

For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 6.04 kWh/m² in June across the year — September's 4.5 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Is September a good time to visit Boone?

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

6.4
Sightseeing
1st-best month of the year
4.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Boone for sightseeing.

What to pack for Boone in September

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

In September, Boone sees daytime highs around 71°F and nights near 55°F. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

UV index in Boone in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Boone peaks around July 13 at about 10 (extreme) — 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 highVery highHighModerateJul 13UV 10Dec 20UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Boone in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Boone is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1617 µg/m³Dec 197 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar11Good
Apr11Good
May13Moderate
Jun15Moderate
Jul18Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is Boone?

Boone sits at 36.2°N, 81.7°W, 3,219 ft above sea level, in United States. The nearest listed city is Lenoir, 22 mi away.

Topography around Boone

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

Within 2 miles, the terrain around Boone has significant variations in elevation — a maximum elevation change of 1,663 ft around an average of 3,445 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,072 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,909 ft.

The land around Boone is covered by trees (75%) within 2 miles, trees (87%) within 10 miles, and trees (81%) within 50 miles.

2 miles
1,663 ft
10 miles
4,072 ft
50 miles
5,909 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Lenoir 22 mi · Morganton 32 mi · Hickory 39 mi · Johnson City 39 mi · Bristol 39 mi · Bristol 39 mi · Statesville 53 mi · Kingsport 55 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 Boone (36.2168°, -81.6745°, elevation 3,219 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).