Southglenn weather in May

In May, Southglenn sees average daytime highs of 66°F and overnight lows near 40°F, with 3.5 in of precipitation across 12.5 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 61°F in the first days to 71°F by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 36 min by month's end. Set against the rest of the year, May is Southglenn's 12th-clearest and 7th-windiest month. For the whole year in context, see Southglenn's year-round climate.

Daytime high
66°
5th warmest
Overnight low
40°
8th coldest
Precipitation
3.5 in
12.5 wet days
Daylight
14 h 12 min
4:51 AM – 7:01 PM
Cloud cover
59%
12th clearest
Wind
5 mph
7th windiest
Solar energy
6.89 kWh/m²
Travel score
5.6
out of 10

Southglenn is neighborhood in Centennial, Colorado, United States.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 61°F in the first days to 71°F by the end.

A typical May day in Southglenn reaches about 66°F in the afternoon and slips back to 40°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 51°F and 78°F. Set against its neighbours, May runs about 10°F warmer than April and about 12°F cooler than June.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
16034
26034
36035
46135
56136
66236
76236
86337
96337
106438
116438
126438
136539
146539
156539
166640
176640
186740
196741
206741
216742
226842
236842
246942
256943
266943
277044
287044
297144
307145
317145

How May really feels in Southglenn

Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 6 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
6
wind chill below the day's low

The story in May is cold — wind chill drags the overnight "feels like" below the raw low.

Southglenn weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 14°0.95.35.49.50.0
Feb42° / 16°0.95.75.810.40.3
Mar50° / 23°2.07.86.511.72.4
Apr56° / 29°3.0106.2133.7
May66° / 40°3.512.51.714.15.6
Jun77° / 49°2.39.7014.76.9
Jul83° / 55°2.29.9014.56.1
Aug81° / 54°1.99.4013.66.8
Sep74° / 46°1.56.40.612.37.6
Oct61° / 34°1.76.32.810.95.9
Nov48° / 23°1.25.95.29.82.2
Dec39° / 14°0.94.859.30.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 24% of May, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55149
65149
75149
85149
95149
105050
115050
125050
135050
145050
154951
164951
174852
184852
194852
204951
214852
224852
234852
244951
255050
265050
275149
285347
295347
305446
315545

Chance of precipitation in May

Any precipitationSnow

Southglenn gets around 3.5 in of rain and snow over 12.5 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 41% and peaks near 43% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13915
23914
33914
43913
53912
63911
73910
8399
9399
10398
11397
12407
13407
14406
15416
16416
17425
18425
19424
20434
21433
22433
23433
24422
25422
26422
27411
28411
29401
30401
31390

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in May

Winds average 5 mph in May.

Across May, 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.

0246810151015202531
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
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:08 AM to 4:40 AM, and sunset from 6:46 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:086:46
213.75:066:47
313.75:056:48
413.85:046:49
513.85:036:50
613.85:016:51
713.95:006:52
813.94:596:53
913.94:586:54
1014.04:576:55
1114.04:566:56
1214.04:556:57
1314.14:546:58
1414.14:536:59
1514.14:527:00
1614.24:517:01
1714.24:507:02
1814.24:497:03
1914.34:487:04
2014.34:477:05
2114.34:477:06
2214.34:467:07
2314.44:457:08
2414.44:447:08
2514.44:447:09
2614.44:437:10
2714.54:437:11
2814.54:427:12
2914.54:417:13
3014.54:417:13
3114.64:407:14

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.89 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 — May's 6.89 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.9Intense
156.9Intense
166.9Intense
176.9Intense
186.9Intense
196.9Intense
206.9Intense
216.9Intense
227.0Intense
237.0Intense
247.0Intense
257.0Intense
267.0Intense
277.1Intense
287.1Intense
297.1Intense
307.2Intense
317.2Intense
Planning a trip in May

Is May a good time to visit Southglenn?

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

5.6
Sightseeing
6th-best month of the year
2.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Southglenn for sightseeing.

What to pack for Southglenn in May

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

In May, Southglenn sees daytime highs around 66°F and nights near 40°F. Pack sun protection. Worth having: a warm layer and rain gear. About 13 days see rain.

sun protectiona warm layerrain gear

UV index in Southglenn in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 13UV 11Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar7High
Apr6High
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec2Low

Air quality in Southglenn in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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).

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 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
10 miles
1,476 ft
50 miles
9,439 ft
treesgrasslandcroplandartificial surfacesbare terrainwatermoss and lichen
May 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
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 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).