Bon Air weather in September

In September, Bon Air sees average daytime highs of 80°F and overnight lows near 63°F, with 4.4 in of rain across 9.3 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 84°F in the first days to 76°F by the end. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels muggy.

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 Bon Air's 5th-clearest and 9th-windiest month. For the whole year in context, see Bon Air's year-round climate.

Daytime high
80°
4th warmest
Overnight low
63°
9th coldest
Rainfall
4.4 in
9.3 wet days
Daylight
12 h 12 min
5:57 AM – 6:12 PM
Cloud cover
57%
5th clearest
Wind
6 mph
9th windiest
Solar energy
4.3 kWh/m²
Travel score
6.5
out of 10

Bon Air is census designated place in Chesterfield County, Virginia, United States.

Density
756/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 84°F in the first days to 76°F by the end.

A typical September day in Bon Air reaches about 80°F in the afternoon and slips back to 63°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 89°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)
18467
28467
38467
48467
58366
68366
78366
88365
98265
108265
118264
128164
138164
148164
158063
168063
178062
187962
197962
207962
217861
227861
237860
247760
257760
267760
277659
287659
297658
307658

How September really feels in Bon Air

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.

Bon Air 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
Jan47° / 32°3.49.22.29.71.7
Feb51° / 33°3.08.21.910.62.5
Mar59° / 40°4.010.1111.74.6
Apr69° / 49°3.29.5012.96.4
May77° / 58°3.2110146.6
Jun85° / 67°3.811.3014.55.2
Jul89° / 71°4.213014.34.0
Aug86° / 70°4.310.8013.44.8
Sep80° / 63°4.49.3012.36.5
Oct70° / 51°3.77.60117.0
Nov59° / 41°3.27.80.1105.0
Dec51° / 35°3.58.819.52.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% 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 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35248
45248
55347
65347
75347
85347
95347
105347
115347
125347
135248
145248
155248
165149
175149
185050
195050
205050
214951
224951
235050
245149
255149
265248
275248
285347
295347
305446

Chance of precipitation in September

Any precipitation

Bon Air gets around 4.4 in of rain over 9.3 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 30% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
132
232
332
432
531
631
730
829
929
1029
1128
1228
1328
1428
1528
1628
1728
1829
1929
2030
2131
2231
2331
2431
2531
2630
2730
2829
2928
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 25% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1614253125
2614253025
3714243024
4815243023
5916242922
61016242921
71117242820
81217252818
91317252717
101418252716
111518252715
121718252614
131818252613
141918252612
152019252611
162119252510
17221925259
18232025248
19242025247
20252025247
21262024236
22272024236
23292023225
24302023215
25312123215
26332122204
27352122194
28362121184
29382120174
30402120164

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 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
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:45 AM to 6:10 AM, and sunset from 6:35 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:456:35
212.85:456:34
312.85:466:32
412.75:476:31
512.75:486:29
612.65:496:28
712.65:506:26
812.65:516:24
912.55:516:23
1012.55:526:21
1112.45:536:20
1212.45:546:18
1312.45:556:16
1412.35:566:15
1512.35:576:13
1612.25:576:12
1712.25:586:10
1812.25:596:08
1912.16:006:07
2012.16:016:05
2112.06:026:04
2212.06:036:02
2311.96:046:00
2411.96:045:59
2511.96:055:57
2611.86:065:56
2711.86:075:54
2811.76:085:52
2911.76:095:51
3011.76:105:49

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 2.12 kWh/m² to a high of 6.16 kWh/m² in June across the year — September's 4.3 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.4Bright
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 Bon Air?

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

6.5
Sightseeing
3rd-best month of the year
6.7
Beach & pool
1st-best month of the year

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

What to pack for Bon Air in September

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

In September, Bon Air sees daytime highs around 80°F and nights near 63°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Bon Air 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 Bon Air peaks around June 21 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 21UV 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 Bon Air 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 Bon Air is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Nov 217 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr11Good
May13Moderate
Jun15Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov7Good
Dec7Good
Location & terrain

Where is Bon Air?

Bon Air sits at 37.5°N, 77.6°W, 322 ft above sea level, in United States. The nearest listed city is Tuckahoe, 4.3 mi away.

Topography around Bon Air

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

Within 2 miles, the terrain around Bon Air has only modest variations in elevation — a maximum elevation change of 285 ft around an average of 295 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 778 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,266 ft.

The land around Bon Air is covered by trees (83%) within 2 miles, trees (72%) within 10 miles, and trees (80%) within 50 miles.

2 miles
285 ft
10 miles
778 ft
50 miles
1,266 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Tuckahoe 4.3 mi · Midlothian 5.0 mi · Richmond 5.6 mi · Meadowbrook 6.8 mi · Laurel 8.7 mi · Short Pump 9.3 mi · Mechanicsville 12 mi · Highland Springs 12 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 Bon Air (37.5249°, -77.5578°, elevation 322 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).