Culpeper weather in September

In September, Culpeper sees average daytime highs of 79°F and overnight lows near 60°F, with 4.4 in of rain across 9.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 83°F in the first days to 74°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 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Culpeper's 3rd-clearest and 9th-windiest month. For the whole year in context, see Culpeper's year-round climate.

Daytime high
79°
4th warmest
Overnight low
60°
9th coldest
Rainfall
4.4 in
9.2 wet days
Daylight
12 h 12 min
5:59 AM – 6:14 PM
Cloud cover
56%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.3 kWh/m²
Travel score
6.8
out of 10

Culpeper is town in Culpeper County, Virginia, United States.

Density
926/km²
people per km²
Founded
1759

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 83°F in the first days to 74°F by the end.

A typical September day in Culpeper reaches about 79°F in the afternoon and slips back to 60°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 88°F. Set against its neighbours, September runs about 7°F cooler than August and about 11°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18365
28365
38365
48364
58264
68264
78263
88163
98163
108162
118062
128062
138061
147961
157960
167960
177860
187859
197859
207759
217758
227658
237658
247657
257557
267556
277556
287456
297455
307455

How September really feels in Culpeper

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.

Culpeper weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan44° / 28°3.08.22.89.60.8
Feb47° / 29°2.78.12.710.51.7
Mar56° / 37°3.8101.711.73.8
Apr67° / 47°3.49.90.1136.1
May75° / 56°3.711.3014.16.5
Jun83° / 65°3.511.4014.65.5
Jul87° / 69°3.511.3014.44.5
Aug85° / 67°3.19.8013.55.1
Sep79° / 60°4.49.2012.36.8
Oct68° / 48°3.27.60116.7
Nov56° / 38°3.07.40.39.94.2
Dec47° / 32°3.38.51.89.41.7

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 47%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25248
35347
45347
55347
65446
75446
85446
95446
105545
115545
125545
135446
145347
155248
165347
175248
185149
195050
205050
214951
225050
235050
245149
255149
265347
275347
285446
295446
305545

Chance of precipitation in September

Any precipitation

Culpeper gets around 4.4 in of rain over 9.2 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
331
430
530
630
730
829
929
1029
1129
1228
1328
1428
1528
1628
1728
1828
1929
2029
2130
2230
2330
2430
2530
2630
2729
2829
2929
3028

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11420253011
21521242911
31721242810
41821232710
5192223279
6212222269
7222322258
8242322248
9252321237
10272421226
11282421216
12302421215
13312321204
14322322194
15342322183
16352322183
17362322173
18372321162
19382321152
20402321152
21412221142
22422220141
23442220131
24452119131
25472119131
26482119121
27492018121
28512018110
29531917110
30541817110

Wind in September

Winds average 5 mph in September.

Across September, 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.

0246810151015202530
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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:45 AM to 6:12 AM, and sunset from 6:38 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:456:38
212.85:466:36
312.85:476:35
412.85:486:33
512.75:496:32
612.75:506:30
712.65:516:28
812.65:526:27
912.55:536:25
1012.55:546:24
1112.55:546:22
1212.45:556:20
1312.45:566:19
1412.35:576:17
1512.35:586:15
1612.25:596:14
1712.26:006:12
1812.26:016:10
1912.16:026:09
2012.16:036:07
2112.06:036:05
2212.06:046:04
2311.96:056:02
2411.96:066:00
2511.96:075:59
2611.86:085:57
2711.86:095:56
2811.76:105:54
2911.76:115:52
3011.66:125:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.3 kWh/m².

For context, solar energy here swings from a low near 2.04 kWh/m² to a high of 6.17 kWh/m² in June across the year — September's 4.3 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Bright
254.0Moderate
264.0Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Is September a good time to visit Culpeper?

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

6.8
Sightseeing
1st-best month of the year
6.5
Beach & pool
3rd-best month of the year

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

What to pack for Culpeper in September

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

In September, Culpeper sees daytime highs around 79°F and nights near 60°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Culpeper in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Culpeper peaks around June 23 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 highHighModerateJun 23UV 9Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Culpeper 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 Culpeper is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1316 µg/m³Nov 168 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr15Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Culpeper?

Culpeper sits at 38.5°N, 78.0°W, 413 ft above sea level, in United States. The nearest listed city is Linton Hall, 30 mi away.

Topography around Culpeper

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

Within 2 miles, the terrain around Culpeper has only modest variations in elevation — a maximum elevation change of 279 ft around an average of 427 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,145 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,190 ft.

The land around Culpeper is covered by trees (39%) and grassland (39%) within 2 miles, trees (56%) and grassland (30%) within 10 miles, and trees (72%) and grassland (20%) within 50 miles.

2 miles
279 ft
10 miles
1,145 ft
50 miles
4,190 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Linton Hall 30 mi · Fredericksburg 31 mi · Front Royal 32 mi · Manassas 34 mi · Sudley 35 mi · Buckhall 35 mi · Manassas Park 35 mi · Montclair 37 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 Culpeper (38.4732°, -77.9967°, elevation 413 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).