Fredericksburg weather in September

In September, Fredericksburg sees average daytime highs of 79°F and overnight lows near 63°F, with 4.2 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 75°F by the end. The sky is clear or mostly clear about 36% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Fredericksburg's 3rd-clearest and 9th-windiest month. For the whole year in context, see Fredericksburg's year-round climate.

Daytime high
79°
4th warmest
Overnight low
63°
9th coldest
Rainfall
4.2 in
9.2 wet days
Daylight
12 h 12 min
5:57 AM – 6:11 PM
Cloud cover
56%
3rd clearest
Wind
6 mph
9th windiest
Solar energy
4.3 kWh/m²
Travel score
6.7
out of 10

Fredericksburg is independent city in Virginia, United States.

Density
1,033/km²
people per km²
Founded
1691

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 75°F by the end.

A typical September day in Fredericksburg reaches about 79°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 70°F and 89°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)
18467
28367
38367
48367
58366
68366
78266
88265
98265
108165
118164
128164
138064
148064
158063
167963
177962
187862
197862
207861
217861
227761
237760
247660
257660
267659
277559
287558
297558
307458

How September really feels in Fredericksburg

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.

Fredericksburg 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
Jan45° / 30°3.192.69.61.1
Feb48° / 32°2.88.32.310.51.9
Mar57° / 39°3.910.41.511.74.0
Apr68° / 49°3.39.60136.2
May75° / 58°3.4110146.6
Jun84° / 67°3.511.4014.65.3
Jul88° / 71°3.712.1014.44.2
Aug86° / 70°3.510.2013.54.9
Sep79° / 63°4.29.2012.36.7
Oct69° / 51°3.47.70116.8
Nov58° / 41°3.07.50.19.94.6
Dec49° / 34°3.48.71.39.42.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25446
35446
45545
55545
65545
75545
85545
95545
105446
115446
125446
135446
145347
155347
165248
175149
185050
195050
205050
215050
225050
235050
245149
255149
265248
275347
285347
295446
305446

Chance of precipitation in September

Any precipitation

Fredericksburg gets around 4.2 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
431
531
631
730
830
930
1029
1129
1228
1328
1428
1528
1628
1728
1828
1929
2029
2129
2230
2330
2430
2529
2629
2729
2828
2928
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 25% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1716252922
2816252822
3917252821
41018252720
51118252619
61219252518
71320252517
81420252416
91521252415
101621252314
111721262313
121821262312
132021262211
142121262210
15222126229
16232226228
17252226217
18262126216
19272126215
20292125205
21302125204
22322125193
23342024193
24352024182
25372023182
26391923172
27411922162
28431921162
29451821152
30461820142

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
95calm
105calm
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 54 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 72 minutes over September. Sunrise moves from 5:43 AM to 6:10 AM, and sunset from 6:36 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:436:36
212.85:446:34
312.85:456:33
412.75:466:31
512.75:476:29
612.75:486:28
712.65:496:26
812.65:506:25
912.55:516:23
1012.55:516:21
1112.55:526:20
1212.45:536:18
1312.45:546:16
1412.35:556:15
1512.35:566:13
1612.25:576:11
1712.25:586:10
1812.25:596:08
1912.16:006:07
2012.16:006:05
2112.06:016:03
2212.06:026:02
2311.96:036:00
2411.96:045:58
2511.96:055:57
2611.86:065:55
2711.86:075:53
2811.76:085:52
2911.76:095:50
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 2.04 kWh/m² to a high of 6.15 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
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Bright
254.0Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Fredericksburg?

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

6.7
Sightseeing
2nd-best month of the year
6.6
Beach & pool
2nd-best month of the year

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

What to pack for Fredericksburg in September

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

In September, Fredericksburg sees daytime highs around 79°F and nights near 63°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Fredericksburg 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 Fredericksburg peaks around July 10 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 highHighModerateJul 10UV 9Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Fredericksburg 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 Fredericksburg is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar12Good
Apr13Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Fredericksburg?

Fredericksburg sits at 38.3°N, 77.5°W, 56 ft above sea level, in United States. The nearest listed city is Cherry Hill, 21 mi away.

Topography around Fredericksburg

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

Within 2 miles, the terrain around Fredericksburg has only modest variations in elevation — a maximum elevation change of 279 ft around an average of 118 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 528 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,409 ft.

The land around Fredericksburg is covered by trees (62%) and artificial surfaces (22%) within 2 miles, trees (75%) within 10 miles, and trees (72%) within 50 miles.

2 miles
279 ft
10 miles
528 ft
50 miles
3,409 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Cherry Hill 21 mi · Montclair 22 mi · Dale City 24 mi · Lake Ridge 28 mi · Buckhall 30 mi · Lorton 30 mi · Manassas 31 mi · Culpeper 31 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 Fredericksburg (38.3032°, -77.4605°, elevation 56 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).