Cave Spring weather in September

In September, Cave Spring sees average daytime highs of 77°F and overnight lows near 58°F, with 4.0 in of rain across 9.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 73°F by the end. The sky is clear or mostly clear about 37% 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 Cave Spring's 3rd-clearest and 10th-windiest month. For the whole year in context, see Cave Spring's year-round climate.

Daytime high
77°
4th warmest
Overnight low
58°
9th coldest
Rainfall
4.0 in
9.3 wet days
Daylight
12 h 12 min
6:07 AM – 6:21 PM
Cloud cover
55%
3rd clearest
Wind
4 mph
10th windiest
Solar energy
4.35 kWh/m²
Travel score
6.9
out of 10

Cave Spring is census designated place in Roanoke County, Virginia, United States.

Density
809/km²
people per km²

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 81°F in the first days to 73°F by the end.

A typical September day in Cave Spring reaches about 77°F in the afternoon and slips back to 58°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 86°F. Set against its neighbours, September runs about 6°F cooler than August and about 10°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18163
28162
38162
48162
58062
68061
78061
88060
97960
107960
117860
127859
137859
147859
157758
167758
177658
187657
197657
207557
217556
227556
237456
247455
257455
267354
277354
287354
297353
307253

How September really feels in Cave Spring

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.

Cave Spring weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan45° / 28°3.38.62.69.70.9
Feb48° / 30°2.98.52.710.61.8
Mar56° / 37°4.010.6211.73.8
Apr66° / 46°3.510.20.212.96.0
May73° / 54°3.812.30146.4
Jun81° / 62°3.611.7014.56.0
Jul85° / 66°3.311.6014.35.2
Aug83° / 65°3.09.8013.45.9
Sep77° / 58°4.09.3012.36.9
Oct67° / 46°3.17.20.1116.6
Nov56° / 37°3.07.50.2104.1
Dec47° / 31°3.38.31.99.51.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25347
35347
45446
55446
65446
75446
85545
95545
105446
115446
125446
135347
145347
155248
165149
175149
184951
194951
204852
214951
224951
235050
245149
255248
265248
275347
285446
295545
305545

Chance of precipitation in September

Any precipitation

Cave Spring gets around 4.0 in of rain over 9.3 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 30% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
429
529
629
729
829
929
1028
1128
1229
1329
1429
1529
1630
1731
1831
1932
2032
2133
2233
2332
2432
2531
2630
2729
2829
2928
3027

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1132332321
2142331311
3152430301
4172430281
5182529271
6202628261
7212627241
8232727231
9242826211
10252826201
11262826191
12282826181
13282825171
14302925160
15312925150
16322925140
17332925130
18342924120
19352924120
20362924110
21372923100
22392923100
2340282290
2442282190
2544272180
2646262080
2749251970
2851241870
2953231770
3055221670

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
194calm
204calm
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 5:55 AM to 6:19 AM, and sunset from 6:45 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:556:45
212.85:556:43
312.85:566:42
412.75:576:40
512.75:586:39
612.65:596:37
712.66:006:36
812.66:016:34
912.56:016:33
1012.56:026:31
1112.46:036:29
1212.46:046:28
1312.46:056:26
1412.36:066:25
1512.36:066:23
1612.26:076:21
1712.26:086:20
1812.26:096:18
1912.16:106:17
2012.16:116:15
2112.06:126:13
2212.06:126:12
2311.96:136:10
2411.96:146:09
2511.96:156:07
2611.86:166:06
2711.86:176:04
2811.76:186:02
2911.76:196:01
3011.76:195:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.35 kWh/m².

For context, solar energy here swings from a low near 2.17 kWh/m² to a high of 6.09 kWh/m² in June across the year — September's 4.35 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.7Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.5Bright
134.5Bright
144.5Bright
154.4Bright
164.3Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.1Bright
244.0Bright
254.0Bright
264.0Moderate
274.0Moderate
284.0Moderate
294.0Moderate
303.9Moderate
Planning a trip in September

Is September a good time to visit Cave Spring?

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

6.9
Sightseeing
1st-best month of the year
6.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Cave Spring for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Cave Spring in September

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

In September, Cave Spring sees daytime highs around 77°F and nights near 58°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Cave Spring 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 Cave Spring 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
Nov3Moderate
Dec2Moderate

Air quality in Cave Spring 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 Cave Spring is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Dec 126 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr10Good
May13Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Cave Spring?

Cave Spring sits at 37.2°N, 80.0°W, 1,099 ft above sea level, in United States. The nearest listed city is Roanoke, 5.0 mi away.

Topography around Cave Spring

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

Within 2 miles, the terrain around Cave Spring has significant variations in elevation — a maximum elevation change of 961 ft around an average of 1,230 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,140 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,875 ft.

The land around Cave Spring is covered by trees (77%) within 2 miles, trees (81%) within 10 miles, and trees (80%) within 50 miles.

2 miles
961 ft
10 miles
3,140 ft
50 miles
3,875 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Roanoke 5.0 mi · Salem 5.0 mi · Blacksburg 22 mi · Christiansburg 23 mi · Radford 32 mi · West Lynchburg 47 mi · Lynchburg 50 mi · Eden 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 Cave Spring (37.2276°, -80.0128°, elevation 1,099 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).