Southglenn weather in August

In August, Southglenn sees average daytime highs of 81°F and overnight lows near 54°F, with 1.9 in of rain across 9.4 wet days and about 13.6 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Southglenn's 8th-clearest and 12th-windiest month. For the whole year in context, see Southglenn's year-round climate.

Daytime high: 81°; 2nd warmest
Overnight low: 54°; 11th coldest
Rainfall: 1.9 in; 9.4 wet days
Daylight: 13 h 36 min; 5:17 AM – 6:51 PM
Cloud cover: 50%; 8th clearest
Wind: 4 mph; 12th windiest
Solar energy: 6.47 kWh/m²
Travel score: 6.8; out of 10

Southglenn is neighborhood in Centennial, Colorado, United States.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← July Southglenn year-round climate September →Best places to visit in August

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 81°F through the month.

A typical August day in Southglenn reaches about 81°F in the afternoon and slips back to 54°F overnight — a 27°F spread between the day's warmth and the night's chill. On most days the high lands between 72°F and 88°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	82	82	82	81	81	81	81	81	81	81	81	81	81	81	81	81	81	81	81	81	81	80	80	80	80	80	80	80	80	79	79
Avg low (°F)	55	55	55	55	55	55	55	55	55	54	54	54	54	54	54	54	54	54	54	53	53	53	53	53	53	53	53	52	52	52	52

	Avg high (°F)	Avg low (°F)
1	82	55
2	82	55
3	82	55
4	81	55
5	81	55
6	81	55
7	81	55
8	81	55
9	81	55
10	81	54
11	81	54
12	81	54
13	81	54
14	81	54
15	81	54
16	81	54
17	81	54
18	81	54
19	81	54
20	81	53
21	81	53
22	80	53
23	80	53
24	80	53
25	80	53
26	80	53
27	80	53
28	80	52
29	80	52
30	79	52
31	79	52

How August really feels in Southglenn

Once humidity and wind are folded in, August 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

heat index over the day's high

Days feeling ≤ 32°F

wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Southglenn weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	40° / 14°	0.9	5.3	5.4	9.5	0.0
Feb	42° / 16°	0.9	5.7	5.8	10.4	0.3
Mar	50° / 23°	2.0	7.8	6.5	11.7	2.4
Apr	56° / 29°	3.0	10	6.2	13	3.7
May	66° / 40°	3.5	12.5	1.7	14.1	5.6
Jun	77° / 49°	2.3	9.7	0	14.7	6.9
Jul	83° / 55°	2.2	9.9	0	14.5	6.1
Aug	81° / 54°	1.9	9.4	0	13.6	6.8
Sep	74° / 46°	1.5	6.4	0.6	12.3	7.6
Oct	61° / 34°	1.7	6.3	2.8	10.9	5.9
Nov	48° / 23°	1.2	5.9	5.2	9.8	2.2
Dec	39° / 14°	0.9	4.8	5	9.3	0.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 29% of August, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	60	60	62	63	63	64	66	66	67	67	68	69	69	69	70	70	70	70	70	70	70	70	70	71	71	71	72	72	72	73	73
Cloudier (%)	40	40	38	37	37	36	34	34	33	33	32	31	31	31	30	30	30	30	30	30	30	30	30	29	29	29	28	28	28	27	27

	Clearer (%)	Cloudier (%)
1	60	40
2	60	40
3	62	38
4	63	37
5	63	37
6	64	36
7	66	34
8	66	34
9	67	33
10	67	33
11	68	32
12	69	31
13	69	31
14	69	31
15	70	30
16	70	30
17	70	30
18	70	30
19	70	30
20	70	30
21	70	30
22	70	30
23	70	30
24	71	29
25	71	29
26	71	29
27	72	28
28	72	28
29	72	28
30	73	27
31	73	27

Chance of precipitation in August

Any precipitation

Southglenn gets around 1.9 in of rain over 9.4 wet days in August. 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 35% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	35	35	34	34	34	33	33	33	33	33	32	32	31	31	30	30	29	29	28	28	27	27	26	26	25	24	24	23	23	23	23

	Rain chance (%)
1	35
2	35
3	34
4	34
5	34
6	33
7	33
8	33
9	33
10	33
11	32
12	32
13	31
14	31
15	30
16	30
17	29
18	29
19	28
20	28
21	27
22	27
23	26
24	26
25	25
26	24
27	24
28	23
29	23
30	23
31	23

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	88	89	89	89	90	91	91	92	93	93	94	95	95	96	96	97	97	97	98	98	98	98	98	99	99	99	99	99	99	99	99
Comfortable (%)	12	11	11	11	10	9	9	8	7	7	6	5	5	4	4	3	3	3	2	2	2	2	2	1	1	1	1	1	1	1	1

	Dry (%)	Comfortable (%)
1	88	12
2	89	11
3	89	11
4	89	11
5	90	10
6	91	9
7	91	9
8	92	8
9	93	7
10	93	7
11	94	6
12	95	5
13	95	5
14	96	4
15	96	4
16	97	3
17	97	3
18	97	3
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

Wind in August

Winds average 4 mph in August, the calmest month.

Across August, 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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5	5	5	5	5	5
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (mph)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	calm
31	5	calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over August. Sunrise moves from 5:03 AM to 5:31 AM, and sunset from 7:09 PM to 6:28 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	14.1	14.1	14.0	14.0	14.0	13.9	13.9	13.9	13.8	13.8	13.8	13.7	13.7	13.6	13.6	13.6	13.5	13.5	13.5	13.4	13.4	13.3	13.3	13.2	13.2	13.2	13.1	13.1	13.0	13.0	13.0
Sunrise (AM)	5:03	5:04	5:05	5:05	5:06	5:07	5:08	5:09	5:10	5:11	5:12	5:13	5:14	5:15	5:16	5:17	5:18	5:19	5:20	5:21	5:22	5:23	5:24	5:25	5:25	5:26	5:27	5:28	5:29	5:30	5:31
Sunset (PM)	7:09	7:08	7:07	7:06	7:05	7:04	7:02	7:01	7:00	6:59	6:58	6:56	6:55	6:54	6:52	6:51	6:50	6:48	6:47	6:45	6:44	6:42	6:41	6:39	6:38	6:36	6:35	6:33	6:32	6:30	6:28

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.1	5:03	7:09
2	14.1	5:04	7:08
3	14.0	5:05	7:07
4	14.0	5:05	7:06
5	14.0	5:06	7:05
6	13.9	5:07	7:04
7	13.9	5:08	7:02
8	13.9	5:09	7:01
9	13.8	5:10	7:00
10	13.8	5:11	6:59
11	13.8	5:12	6:58
12	13.7	5:13	6:56
13	13.7	5:14	6:55
14	13.6	5:15	6:54
15	13.6	5:16	6:52
16	13.6	5:17	6:51
17	13.5	5:18	6:50
18	13.5	5:19	6:48
19	13.5	5:20	6:47
20	13.4	5:21	6:45
21	13.4	5:22	6:44
22	13.3	5:23	6:42
23	13.3	5:24	6:41
24	13.2	5:25	6:39
25	13.2	5:25	6:38
26	13.2	5:26	6:36
27	13.1	5:27	6:35
28	13.1	5:28	6:33
29	13.0	5:29	6:32
30	13.0	5:30	6:30
31	13.0	5:31	6:28

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.47 kWh/m².

For context, solar energy here swings from a low near 2.59 kWh/m² to a high of 7.45 kWh/m² in June across the year — August's 6.47 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	6.8	6.8	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.6	6.6	6.6	6.6	6.6	6.5	6.5	6.5	6.5	6.4	6.4	6.4	6.3	6.3	6.3	6.3	6.2	6.2	6.2	6.1	6.1	6.1
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.8	Intense
2	6.8	Intense
3	6.7	Intense
4	6.7	Intense
5	6.7	Intense
6	6.7	Intense
7	6.7	Intense
8	6.7	Intense
9	6.7	Intense
10	6.6	Intense
11	6.6	Intense
12	6.6	Intense
13	6.6	Intense
14	6.6	Intense
15	6.5	Intense
16	6.5	Intense
17	6.5	Intense
18	6.5	Intense
19	6.4	Intense
20	6.4	Intense
21	6.4	Intense
22	6.3	Intense
23	6.3	Intense
24	6.3	Intense
25	6.3	Intense
26	6.2	Intense
27	6.2	Intense
28	6.2	Intense
29	6.1	Intense
30	6.1	Intense
31	6.1	Intense

Planning a trip in August

Is August a good time to visit Southglenn?

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

6.8

Sightseeing

3rd-best month of the year

6.9

Beach & pool

2nd-best month of the year

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

What to pack for Southglenn in August

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

In August, Southglenn sees daytime highs around 81°F and nights near 54°F. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Southglenn in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Southglenn 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	4	7	6	8	11	11	10	7	5	4	2
Level	Moderate	Moderate	High	High	Very high	Extreme	Extreme	Very high	Very high	High	Moderate	Low

	UV index (midday)	Level
Jan	2	Moderate
Feb	4	Moderate
Mar	7	High
Apr	6	High
May	8	Very high
Jun	11	Extreme
Jul	11	Extreme
Aug	10	Very high
Sep	7	Very high
Oct	5	High
Nov	4	Moderate
Dec	2	Low

Air quality in Southglenn in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Southglenn 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	17	15	16	13	13	14	14	21	13	15	15	16
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	17	Moderate
Feb	15	Moderate
Mar	16	Moderate
Apr	13	Moderate
May	13	Moderate
Jun	14	Moderate
Jul	14	Moderate
Aug	21	Moderate
Sep	13	Moderate
Oct	15	Moderate
Nov	15	Moderate
Dec	16	Moderate

Location & terrain

Where is Southglenn?

Southglenn sits at 39.6°N, 105.0°W, 5,594 ft above sea level, in United States. The nearest listed city is Greenwood Village, 1.9 mi away.

Topography around Southglenn

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

Within 2 miles, the terrain around Southglenn has only modest variations in elevation — a maximum elevation change of 407 ft around an average of 5,614 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,476 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,439 ft.

The land around Southglenn is covered by artificial surfaces (43%) and trees (39%) within 2 miles, artificial surfaces (39%) and grassland (37%) within 10 miles, and grassland (48%) and trees (32%) within 50 miles.

2 miles

407 ft

artificial surfaces 43%

10 miles

1,476 ft

artificial surfaces 39%

50 miles

9,439 ft

grassland 48%

treesgrasslandcroplandartificial surfacesbare terrainwatermoss and lichen

← July Southglenn year-round climate September →Best places to visit in August

August weather nearby: Greenwood Village 1.9 mi · Highlands Ranch 2.5 mi · Castlewood 2.5 mi · Littleton 3.7 mi · Centennial 4.3 mi · Englewood 4.3 mi · Columbine 6.2 mi · Ken Caryl 8.7 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

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 Southglenn (39.5872°, -104.9528°, elevation 5,594 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).

	Avg high (°F)	Avg low (°F)
1	82	55
2	82	55
3	82	55
4	81	55
5	81	55
6	81	55
7	81	55
8	81	55
9	81	55
10	81	54
11	81	54
12	81	54
13	81	54
14	81	54
15	81	54
16	81	54
17	81	54
18	81	54
19	81	54
20	81	53
21	81	53
22	80	53
23	80	53
24	80	53
25	80	53
26	80	53
27	80	53
28	80	52
29	80	52
30	79	52
31	79	52

	Clearer (%)	Cloudier (%)
1	60	40
2	60	40
3	62	38
4	63	37
5	63	37
6	64	36
7	66	34
8	66	34
9	67	33
10	67	33
11	68	32
12	69	31
13	69	31
14	69	31
15	70	30
16	70	30
17	70	30
18	70	30
19	70	30
20	70	30
21	70	30
22	70	30
23	70	30
24	71	29
25	71	29
26	71	29
27	72	28
28	72	28
29	72	28
30	73	27
31	73	27

	Rain chance (%)
1	35
2	35
3	34
4	34
5	34
6	33
7	33
8	33
9	33
10	33
11	32
12	32
13	31
14	31
15	30
16	30
17	29
18	29
19	28
20	28
21	27
22	27
23	26
24	26
25	25
26	24
27	24
28	23
29	23
30	23
31	23

	Dry (%)	Comfortable (%)
1	88	12
2	89	11
3	89	11
4	89	11
5	90	10
6	91	9
7	91	9
8	92	8
9	93	7
10	93	7
11	94	6
12	95	5
13	95	5
14	96	4
15	96	4
16	97	3
17	97	3
18	97	3
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

	Avg high (°F)	Avg low (°F)
1	82	55
2	82	55
3	82	55
4	81	55
5	81	55
6	81	55
7	81	55
8	81	55
9	81	55
10	81	54
11	81	54
12	81	54
13	81	54
14	81	54
15	81	54
16	81	54
17	81	54
18	81	54
19	81	54
20	81	53
21	81	53
22	80	53
23	80	53
24	80	53
25	80	53
26	80	53
27	80	53
28	80	52
29	80	52
30	79	52
31	79	52

	Clearer (%)	Cloudier (%)
1	60	40
2	60	40
3	62	38
4	63	37
5	63	37
6	64	36
7	66	34
8	66	34
9	67	33
10	67	33
11	68	32
12	69	31
13	69	31
14	69	31
15	70	30
16	70	30
17	70	30
18	70	30
19	70	30
20	70	30
21	70	30
22	70	30
23	70	30
24	71	29
25	71	29
26	71	29
27	72	28
28	72	28
29	72	28
30	73	27
31	73	27

	Rain chance (%)
1	35
2	35
3	34
4	34
5	34
6	33
7	33
8	33
9	33
10	33
11	32
12	32
13	31
14	31
15	30
16	30
17	29
18	29
19	28
20	28
21	27
22	27
23	26
24	26
25	25
26	24
27	24
28	23
29	23
30	23
31	23

	Dry (%)	Comfortable (%)
1	88	12
2	89	11
3	89	11
4	89	11
5	90	10
6	91	9
7	91	9
8	92	8
9	93	7
10	93	7
11	94	6
12	95	5
13	95	5
14	96	4
15	96	4
16	97	3
17	97	3
18	97	3
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

	Avg high (°F)	Avg low (°F)
1	82	55
2	82	55
3	82	55
4	81	55
5	81	55
6	81	55
7	81	55
8	81	55
9	81	55
10	81	54
11	81	54
12	81	54
13	81	54
14	81	54
15	81	54
16	81	54
17	81	54
18	81	54
19	81	54
20	81	53
21	81	53
22	80	53
23	80	53
24	80	53
25	80	53
26	80	53
27	80	53
28	80	52
29	80	52
30	79	52
31	79	52

	Clearer (%)	Cloudier (%)
1	60	40
2	60	40
3	62	38
4	63	37
5	63	37
6	64	36
7	66	34
8	66	34
9	67	33
10	67	33
11	68	32
12	69	31
13	69	31
14	69	31
15	70	30
16	70	30
17	70	30
18	70	30
19	70	30
20	70	30
21	70	30
22	70	30
23	70	30
24	71	29
25	71	29
26	71	29
27	72	28
28	72	28
29	72	28
30	73	27
31	73	27

	Rain chance (%)
1	35
2	35
3	34
4	34
5	34
6	33
7	33
8	33
9	33
10	33
11	32
12	32
13	31
14	31
15	30
16	30
17	29
18	29
19	28
20	28
21	27
22	27
23	26
24	26
25	25
26	24
27	24
28	23
29	23
30	23
31	23

	Dry (%)	Comfortable (%)
1	88	12
2	89	11
3	89	11
4	89	11
5	90	10
6	91	9
7	91	9
8	92	8
9	93	7
10	93	7
11	94	6
12	95	5
13	95	5
14	96	4
15	96	4
16	97	3
17	97	3
18	97	3
19	98	2
20	98	2
21	98	2
22	98	2
23	98	2
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1