Cathedral Basilica of the Immaculate Conception

Church Major Catholic cathedral in Colorado with Gothic revival style

In downtown Denver, the Cathedral Basilica of the Immaculate Conception offers neo-Gothic architecture, stained glass and mosaic work; visitors combine cathedral visits with the city’s civic core and museum mile.

Main image

Overview

The Cathedral Basilica of the Immaculate Conception is a Roman Catholic cathedral in central Denver, Colorado, and the seat of the Archdiocese of Denver. The building was constructed in the early 20th century and completed in 1911.

What visitors find / highlights / why people go

The interior is notable for its Neo-Gothic character, stained glass, and a large, vaulted nave that is used for regular liturgies and major diocesan events. Guests commonly attend Mass, special liturgical celebrations, and occasional concerts or community events held in the cathedral.

History

The cathedral was built in the early 1900s to serve the growing Catholic population of Denver and has functioned as the archdiocese’s principal church since its completion in 1911. Over time it has undergone maintenance and restoration work to preserve its structure and interior finishes.

Location

The cathedral sits in central Denver within the city’s urban core, a short distance from downtown and other civic landmarks. It is accessible from central thoroughfares and public transit serving the city center.

  • Seat of the Archdiocese: Serves as the seat of the Roman Catholic Archdiocese of Denver and is the principal Catholic church in the city.
  • Dates and style: Construction took place in the early 20th century and the building was completed in 1911, reflecting a Neo-Gothic style.
Cathedral Basilica of the Immaculate Conception
39.7403, -104.9820

How to Get to Cathedral Basilica of the Immaculate Conception #

The Cathedral Basilica of the Immaculate Conception is in downtown Denver. From Denver International Airport (about 25 miles/40 km to downtown) drive west on I‑70 and then south on I‑25 to central Denver; street parking is available nearby and many downtown RTD buses serve the area. The RTD A Line brings you to Union Station - from there it’s a short taxi ride or a walk of roughly 10-20 minutes into the central cathedral area.

Tips for Visiting Cathedral Basilica of the Immaculate Conception #

  • Visit mid-week in the late morning (after early Masses) when the cathedral is open to tourists but before weekend services draw larger congregations; this timing also gives better interior light for photography.
  • Check the cathedral's parish website or call ahead for the Mass and special-services schedule so you don't arrive during a service and can time a quieter visit.
  • Don't rush the side chapels and the organ loft area-many visitors only see the nave and miss the smaller chapels and decorative details that explain the cathedral's history.

Best Time to Visit Cathedral Basilica of the Immaculate Conception #

Best to visit on weekday mornings or outside major religious services and holiday periods to avoid crowds and fully appreciate the interior.

Year‑round - Off‑peak (best time to visit)
Year-round (weekday mornings) · Indoor - climate‑controlled (comfortable year‑round)
Weekday mornings outside major services are the quietest times to explore the cathedral and appreciate the interior and stained glass without crowds.
Peak (religious services & holidays)
December; Holy Week / Easter (dates vary) · Indoor - climate‑controlled
Sundays, major feast days and the Christmas/Easter periods draw the largest congregations and visitors, so expect limited space and a busier atmosphere.

Weather & Climate near Cathedral Basilica of the Immaculate Conception #

Climate

Cathedral Basilica of the Immaculate Conception's climate is classified as Cold Semi-Arid - Cold Semi-Arid climate with warm summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -8°C to 32°C. Semi-arid with limited rainfall.

Air Quality: AQI 32 Good
Best Time to Visit
SeptemberJulyAugust
Temperature & Rainfall
Temperature Range
37°
Warmest Month
-25°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of 7°C and lows of -8°C. The driest month with just 14 mm and partly cloudy skies.

60 Good

Comfort

Feels Like Freezing
C
Temperature
-8°
55%
Humidity
Humid

Weather

14 mm
Rainfall
3.4 m/s
Wind
Light Breeze
0.4
UV Index
Low
9.6h daylight

February

February is cold with highs of 9°C and lows of -6°C. The driest month with just 14 mm and partly cloudy skies.

68 Good

Comfort

Feels Like Cold
C
Temperature
-6°
56%
Humidity
Humid

Weather

14 mm
Rainfall
3.5 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
10.6h daylight

March

March is cold with highs of 12°C and lows of -3°C. Moderate rainfall (38 mm) and partly cloudy skies.

66 Good

Comfort

Feels Like Cold
C
Temperature
-3° 13°
52%
Humidity
Humid

Weather

38 mm
Rainfall
4.0 m/s
Wind
Light Breeze
1.1
UV Index
High
11.8h daylight

April

April is cold with highs of 17°C and lows of 1°C. Moderate rainfall (51 mm) and partly cloudy skies.

74 Very Good

Comfort

Feels Like Cold
C
Temperature
17°
49%
Humidity
Comfortable

Weather

51 mm
Rainfall
4.3 m/s
Wind
Light Breeze
1.6
UV Index
Very High
13.1h daylight

May

May is cool with highs of 22°C and lows of 6°C. The wettest month with 66 mm of rain and partly cloudy skies.

72 Very Good

Comfort

14°
Feels Like Cool
14°C
Temperature
22°
49%
Humidity
Comfortable

Weather

66 mm
Rainfall
4.0 m/s
Wind
Light Breeze
2.0
UV Index
Very High
14.2h daylight

June

June is mild with highs of 28°C and lows of 12°C. Moderate rainfall (45 mm).

86 Excellent

Comfort

20°
Feels Like Mild
20°C
Temperature
12° 29°
41%
Humidity
Comfortable

Weather

45 mm
Rainfall
3.8 m/s
Wind
Light Breeze
2.4
UV Index
Extreme
14.7h daylight

July

July is the warmest month with highs of 32°C and lows of 15°C. Moderate rainfall (51 mm).

88 Excellent

Comfort

23°
Feels Like Mild
23°C
Temperature
15° 32°
45%
Humidity
Comfortable

Weather

51 mm
Rainfall
3.4 m/s
Wind
Light Breeze
2.5
UV Index
Extreme
14.5h daylight

August

August is mild with highs of 31°C and lows of 14°C. Moderate rainfall (42 mm).

88 Excellent

Comfort

22°
Feels Like Mild
22°C
Temperature
14° 31°
46%
Humidity
Comfortable

Weather

42 mm
Rainfall
3.2 m/s
Wind
Light Breeze
2.1
UV Index
Extreme
13.5h daylight

September

September is cool with highs of 26°C and lows of 9°C. Moderate rainfall (36 mm) and mostly sunny skies.

90 Ideal

Comfort

17°
Feels Like Cool
17°C
Temperature
26°
44%
Humidity
Comfortable

Weather

36 mm
Rainfall
3.3 m/s
Wind
Light Breeze
1.6
UV Index
Very High
12.3h daylight

October

October is cool with highs of 19°C and lows of 2°C. Light rainfall.

80 Excellent

Comfort

11°
Feels Like Cool
11°C
Temperature
19°
48%
Humidity
Comfortable

Weather

28 mm
Rainfall
3.3 m/s
Wind
Light Breeze
1.0
UV Index
Moderate
11.0h daylight

November

November is cold with highs of 11°C and lows of -4°C. Light rainfall.

70 Very Good

Comfort

Feels Like Cold
C
Temperature
-4° 11°
51%
Humidity
Humid

Weather

28 mm
Rainfall
3.3 m/s
Wind
Light Breeze
0.5
UV Index
Moderate
9.9h daylight

December

December is cold with highs of 8°C and lows of -7°C. Light rainfall and partly cloudy skies.

58 Acceptable

Comfort

Feels Like Cold
C
Temperature
-7°
56%
Humidity
Humid

Weather

17 mm
Rainfall
3.3 m/s
Wind
Light Breeze
0.3
UV Index
Low
9.3h daylight

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