Sherrelwood weather in September

In September, Sherrelwood sees average daytime highs of 76°F and overnight lows near 49°F, with 1.4 in of precipitation across 5.8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 72°F by the end. The sky is clear or mostly clear about 51% 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 Sherrelwood's 4th-clearest and 10th-windiest month. For the whole year in context, see Sherrelwood's year-round climate.

Daytime high
76°
4th warmest
Overnight low
49°
9th coldest
Precipitation
1.4 in
5.8 wet days
Daylight
12 h 18 min
5:47 AM – 6:02 PM
Cloud cover
41%
4th clearest
Wind
5 mph
10th windiest
Solar energy
5.49 kWh/m²
Travel score
7.7
out of 10

Sherrelwood is census-designated place in Adams County, Colorado, United States.

Density
2,882/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 72°F by the end.

A typical September day in Sherrelwood reaches about 76°F in the afternoon and slips back to 49°F overnight — a 27°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 87°F. Set against its neighbours, September runs about 7°F cooler than August and about 13°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18254
28154
38154
48153
58053
68053
77952
87952
97951
107851
117851
127850
137750
147749
157649
167649
177648
187548
197547
207447
217447
227446
237346
247346
257345
267245
277244
287244
297144
307143

How September really feels in Sherrelwood

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.

Sherrelwood weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan42° / 18°0.95.259.50.3
Feb44° / 20°0.95.85.510.41.0
Mar53° / 27°1.97.65.711.73.3
Apr59° / 33°2.79.94.7134.7
May69° / 43°3.211114.26.2
Jun80° / 52°2.18.3014.86.8
Jul85° / 58°1.67.2014.55.5
Aug83° / 57°1.56.4013.66.3
Sep76° / 49°1.45.80.512.37.7
Oct64° / 37°1.66.12.210.96.4
Nov51° / 26°1.265.19.82.9
Dec42° / 18°0.84.84.99.20.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27228
37228
47228
57228
67228
77228
87228
97228
107228
117228
127228
137327
147327
157327
167327
177327
187327
197426
207426
217426
227426
237426
247327
257327
267228
277228
287228
297129
307129

Chance of precipitation in September

Any precipitationSnow

Sherrelwood gets around 1.4 in of rain and snow over 5.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 20% and peaks near 22% on the wettest days, and about 1 day brings snow.

0%10%20%30%151015202530
Rain chance (%)Snow chance (%)
1160
2171
3171
4171
5181
6191
7191
8201
9201
10201
11212
12212
13212
14222
15222
16222
17212
18212
19212
20212
21202
22202
23202
24202
25202
26202
27202
28202
29203
30203

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1982
2982
3982
4982
5982
6982
7982
8982
9982
10982
11982
12982
13991
14991
15991
16991
17991
18991
19991
20991
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

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 5:32 AM to 6:00 AM, and sunset from 6:27 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:326:27
212.95:336:26
312.85:346:24
412.85:356:22
512.75:366:21
612.75:376:19
712.75:386:17
812.65:396:16
912.65:406:14
1012.55:416:12
1112.55:426:11
1212.45:436:09
1312.45:446:07
1412.35:456:05
1512.35:466:04
1612.35:476:02
1712.25:486:00
1812.25:495:59
1912.15:505:57
2012.15:505:55
2112.05:515:53
2212.05:525:52
2311.95:535:50
2411.95:545:48
2511.95:555:47
2611.85:565:45
2711.85:575:43
2811.75:585:42
2911.75:595:40
3011.66:005:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.49 kWh/m².

For context, solar energy here swings from a low near 2.55 kWh/m² to a high of 7.45 kWh/m² in June across the year — September's 5.49 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.7Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.5Bright
155.5Bright
165.5Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Sherrelwood?

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

7.7
Sightseeing
1st-best month of the year
6.6
Beach & pool
4th-best month of the year

September is one of the better times to visit Sherrelwood for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sherrelwood in September

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

In September, Sherrelwood sees daytime highs around 76°F and nights near 49°F. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Sherrelwood 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 Sherrelwood peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highHighModerateJul 13UV 11Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar7High
Apr6High
May7Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Sherrelwood 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 Sherrelwood is worst in August — around 21 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (May, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateAug 1620 µg/m³May 1113 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb15Moderate
Mar16Moderate
Apr13Moderate
May13Moderate
Jun14Moderate
Jul14Moderate
Aug21Moderate
Sep13Moderate
Oct15Moderate
Nov15Moderate
Dec16Moderate
Location & terrain

Where is Sherrelwood?

Sherrelwood sits at 39.8°N, 105.0°W, 5,292 ft above sea level, in United States. The nearest listed city is Westminster, 1.9 mi away.

Topography around Sherrelwood

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

Within 2 miles, the terrain around Sherrelwood has only modest variations in elevation — a maximum elevation change of 440 ft around an average of 5,292 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 912 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,685 ft.

The land around Sherrelwood is covered by artificial surfaces (69%) within 2 miles, artificial surfaces (50%) and grassland (29%) within 10 miles, and grassland (42%) and trees (32%) within 50 miles.

2 miles
440 ft
10 miles
912 ft
50 miles
9,685 ft
treesgrasslandcroplandartificial surfacesbare terrainwatermoss and lichen
September weather nearby: Westminster 1.9 mi · Thornton 2.5 mi · Northglenn 3.1 mi · Commerce City 4.3 mi · Arvada 5.0 mi · Wheat Ridge 6.2 mi · Denver 6.8 mi · Broomfield 7.5 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 Sherrelwood (39.8378°, -105.0014°, elevation 5,292 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).