Colorado weather in December
In December, Colorado sees average daytime highs of 31°C and overnight lows near 22°C, with 152 mm of rain across 16.7 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.
Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 25% of the time in December, and the air most often feels oppressive.
Daylight stretches from about 13 h 18 min at the start of December to 13 h 24 min by month's end. Set against the rest of the year, December is Colorado's 11th-clearest and 8th-windiest month. For the whole year in context, see Colorado's year-round climate.
- Daytime high
- 31°
- 1st warmest
- Overnight low
- 22°
- 10th coldest
- Rainfall
- 152 mm
- 16.7 wet days
- Daylight
- 13 h 24 min
- 6:42 AM – 8:06 PM
- Cloud cover
- 66%
- 11th clearest
- Wind
- 9 km/h
- 8th windiest
- Solar energy
- 6.2 kWh/m²
- Travel score
- 3.8
- out of 10
Colorado is human settlement in Brazil.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 31°C through the month.
A typical December day in Colorado reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, December runs on par with November and on par with January.
| 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 (°C) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 21 |
| 2 | 31 | 21 |
| 3 | 31 | 21 |
| 4 | 31 | 21 |
| 5 | 31 | 22 |
| 6 | 31 | 22 |
| 7 | 31 | 22 |
| 8 | 31 | 22 |
| 9 | 31 | 22 |
| 10 | 31 | 22 |
| 11 | 31 | 22 |
| 12 | 31 | 22 |
| 13 | 31 | 22 |
| 14 | 31 | 22 |
| 15 | 31 | 22 |
| 16 | 31 | 22 |
| 17 | 31 | 22 |
| 18 | 31 | 22 |
| 19 | 31 | 22 |
| 20 | 31 | 22 |
| 21 | 31 | 22 |
| 22 | 31 | 22 |
| 23 | 31 | 22 |
| 24 | 31 | 22 |
| 25 | 31 | 22 |
| 26 | 31 | 22 |
| 27 | 31 | 22 |
| 28 | 31 | 22 |
| 29 | 31 | 22 |
| 30 | 31 | 22 |
| 31 | 31 | 22 |
How December really feels in Colorado
Once humidity and wind are folded in, December averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Colorado weather by month
How December compares with the rest of the year at a glance. December is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 22° | 195 | 19.1 | 13.2 | 3.5 |
| Feb | 31° / 22° | 147 | 16.9 | 12.8 | 3.6 |
| Mar | 31° / 22° | 105 | 13.2 | 12.2 | 4.4 |
| Apr | 29° / 20° | 63 | 7 | 11.5 | 5.9 |
| May | 26° / 17° | 80 | 7.1 | 10.9 | 7.3 |
| Jun | 25° / 15° | 61 | 6.1 | 10.6 | 7.8 |
| Jul | 25° / 15° | 43 | 4.8 | 10.7 | 8.0 |
| Aug | 28° / 16° | 44 | 4.3 | 11.2 | 7.5 |
| Sep | 29° / 18° | 91 | 8 | 11.9 | 5.9 |
| Oct | 30° / 20° | 127 | 11.8 | 12.5 | 4.7 |
| Nov | 31° / 21° | 124 | 12.3 | 13.1 | 4.3 |
| Dec | 31° / 22° | 152 | 16.7 | 13.4 | 3.8 |
Cloud cover in December
The sky is clear or mostly clear about 25% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 60%.
| 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 (%) | 41 | 40 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 39 | 39 | 40 | 41 | 41 | 42 | 42 | 43 | 43 | 42 | 43 | 42 | 41 | 40 | 39 | 39 | 39 | 38 | 37 | 37 |
| Cloudier (%) | 59 | 60 | 61 | 61 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 61 | 61 | 60 | 59 | 59 | 58 | 58 | 57 | 57 | 58 | 57 | 58 | 59 | 60 | 61 | 61 | 61 | 62 | 63 | 63 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 41 | 59 |
| 2 | 40 | 60 |
| 3 | 39 | 61 |
| 4 | 39 | 61 |
| 5 | 38 | 62 |
| 6 | 38 | 62 |
| 7 | 38 | 62 |
| 8 | 38 | 62 |
| 9 | 38 | 62 |
| 10 | 38 | 62 |
| 11 | 38 | 62 |
| 12 | 39 | 61 |
| 13 | 39 | 61 |
| 14 | 40 | 60 |
| 15 | 41 | 59 |
| 16 | 41 | 59 |
| 17 | 42 | 58 |
| 18 | 42 | 58 |
| 19 | 43 | 57 |
| 20 | 43 | 57 |
| 21 | 42 | 58 |
| 22 | 43 | 57 |
| 23 | 42 | 58 |
| 24 | 41 | 59 |
| 25 | 40 | 60 |
| 26 | 39 | 61 |
| 27 | 39 | 61 |
| 28 | 39 | 61 |
| 29 | 38 | 62 |
| 30 | 37 | 63 |
| 31 | 37 | 63 |
Chance of precipitation in December
Colorado gets around 152 mm of rain over 16.7 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 53% and peaks near 60% on the wettest days. The odds climb 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 (%) | 48 | 49 | 50 | 50 | 51 | 51 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 53 | 53 | 54 | 55 | 56 | 56 | 57 | 58 | 58 | 59 | 59 | 60 |
| Rain chance (%) | |
|---|---|
| 1 | 48 |
| 2 | 49 |
| 3 | 50 |
| 4 | 50 |
| 5 | 51 |
| 6 | 51 |
| 7 | 52 |
| 8 | 52 |
| 9 | 52 |
| 10 | 52 |
| 11 | 52 |
| 12 | 52 |
| 13 | 52 |
| 14 | 52 |
| 15 | 52 |
| 16 | 52 |
| 17 | 52 |
| 18 | 52 |
| 19 | 52 |
| 20 | 53 |
| 21 | 53 |
| 22 | 54 |
| 23 | 55 |
| 24 | 56 |
| 25 | 56 |
| 26 | 57 |
| 27 | 58 |
| 28 | 58 |
| 29 | 59 |
| 30 | 59 |
| 31 | 60 |
Humidity in December
Most of December feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the oppressive band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.
| 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 (%) | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 20 | 19 | 19 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 |
| Muggy (%) | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 35 | 35 | 35 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 32 | 32 | 32 | 31 | 31 | 30 | 30 | 29 | 29 | 29 |
| Oppressive (%) | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 52 | 55 | 56 | 57 | 58 | 59 | 59 | 60 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 2 | 8 | 20 | 36 | 35 |
| 2 | 2 | 7 | 19 | 36 | 36 |
| 3 | 2 | 7 | 19 | 36 | 37 |
| 4 | 1 | 6 | 18 | 36 | 38 |
| 5 | 1 | 6 | 17 | 36 | 39 |
| 6 | 1 | 6 | 17 | 36 | 40 |
| 7 | 1 | 5 | 17 | 36 | 41 |
| 8 | 1 | 5 | 16 | 35 | 42 |
| 9 | 1 | 5 | 16 | 35 | 43 |
| 10 | 1 | 5 | 16 | 35 | 44 |
| 11 | 1 | 5 | 16 | 34 | 44 |
| 12 | 1 | 5 | 16 | 34 | 45 |
| 13 | 1 | 4 | 15 | 34 | 45 |
| 14 | 1 | 4 | 15 | 34 | 45 |
| 15 | 1 | 4 | 15 | 34 | 46 |
| 16 | 1 | 4 | 15 | 34 | 46 |
| 17 | 1 | 3 | 15 | 34 | 46 |
| 18 | 1 | 3 | 15 | 34 | 47 |
| 19 | 1 | 3 | 15 | 33 | 48 |
| 20 | 1 | 3 | 15 | 33 | 49 |
| 21 | 1 | 3 | 14 | 33 | 50 |
| 22 | 1 | 2 | 14 | 32 | 51 |
| 23 | 1 | 2 | 13 | 32 | 52 |
| 24 | 1 | 2 | 13 | 32 | 52 |
| 25 | 0 | 2 | 12 | 31 | 55 |
| 26 | 0 | 1 | 12 | 31 | 56 |
| 27 | 0 | 1 | 12 | 30 | 57 |
| 28 | 0 | 1 | 11 | 30 | 58 |
| 29 | 0 | 1 | 11 | 29 | 59 |
| 30 | 0 | 1 | 11 | 29 | 59 |
| 31 | 0 | 1 | 10 | 29 | 60 |
Wind in December
Winds average 9 km/h in December.
Across December, daily wind ranges from about 9 km/h on the calmest days to 9 km/h 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 (km/h) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 (km/h) | Feels | |
|---|---|---|
| 1 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in December
Daylight runs from about 13 h 18 min at the start of December to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over December. Sunrise moves from 6:39 AM to 6:50 AM, and sunset from 7:57 PM to 8:13 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) | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 |
| Sunrise (AM) | 6:39 | 6:39 | 6:39 | 6:39 | 6:39 | 6:39 | 6:40 | 6:40 | 6:40 | 6:40 | 6:41 | 6:41 | 6:41 | 6:42 | 6:42 | 6:42 | 6:43 | 6:43 | 6:43 | 6:44 | 6:44 | 6:45 | 6:45 | 6:46 | 6:46 | 6:47 | 6:47 | 6:48 | 6:48 | 6:49 | 6:50 |
| Sunset (PM) | 7:57 | 7:57 | 7:58 | 7:59 | 7:59 | 8:00 | 8:01 | 8:01 | 8:02 | 8:02 | 8:03 | 8:04 | 8:04 | 8:05 | 8:05 | 8:06 | 8:06 | 8:07 | 8:07 | 8:08 | 8:08 | 8:09 | 8:09 | 8:10 | 8:10 | 8:11 | 8:11 | 8:12 | 8:12 | 8:12 | 8:13 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.3 | 6:39 | 7:57 |
| 2 | 13.3 | 6:39 | 7:57 |
| 3 | 13.3 | 6:39 | 7:58 |
| 4 | 13.3 | 6:39 | 7:59 |
| 5 | 13.3 | 6:39 | 7:59 |
| 6 | 13.3 | 6:39 | 8:00 |
| 7 | 13.4 | 6:40 | 8:01 |
| 8 | 13.4 | 6:40 | 8:01 |
| 9 | 13.4 | 6:40 | 8:02 |
| 10 | 13.4 | 6:40 | 8:02 |
| 11 | 13.4 | 6:41 | 8:03 |
| 12 | 13.4 | 6:41 | 8:04 |
| 13 | 13.4 | 6:41 | 8:04 |
| 14 | 13.4 | 6:42 | 8:05 |
| 15 | 13.4 | 6:42 | 8:05 |
| 16 | 13.4 | 6:42 | 8:06 |
| 17 | 13.4 | 6:43 | 8:06 |
| 18 | 13.4 | 6:43 | 8:07 |
| 19 | 13.4 | 6:43 | 8:07 |
| 20 | 13.4 | 6:44 | 8:08 |
| 21 | 13.4 | 6:44 | 8:08 |
| 22 | 13.4 | 6:45 | 8:09 |
| 23 | 13.4 | 6:45 | 8:09 |
| 24 | 13.4 | 6:46 | 8:10 |
| 25 | 13.4 | 6:46 | 8:10 |
| 26 | 13.4 | 6:47 | 8:11 |
| 27 | 13.4 | 6:47 | 8:11 |
| 28 | 13.4 | 6:48 | 8:12 |
| 29 | 13.4 | 6:48 | 8:12 |
| 30 | 13.4 | 6:49 | 8:12 |
| 31 | 13.4 | 6:50 | 8:13 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 6.2 kWh/m².
For context, solar energy here swings from a low near 3.47 kWh/m² to a high of 6.23 kWh/m² in November across the year — December's 6.2 kWh/m² sits near the top of that range.
| 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) | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.0 |
| 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 | 6.3 | Intense |
| 2 | 6.3 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.2 | Intense |
| 10 | 6.2 | Intense |
| 11 | 6.2 | Intense |
| 12 | 6.2 | Intense |
| 13 | 6.2 | Intense |
| 14 | 6.2 | Intense |
| 15 | 6.2 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.3 | Intense |
| 18 | 6.3 | Intense |
| 19 | 6.3 | Intense |
| 20 | 6.3 | Intense |
| 21 | 6.3 | Intense |
| 22 | 6.3 | Intense |
| 23 | 6.2 | Intense |
| 24 | 6.2 | Intense |
| 25 | 6.2 | Intense |
| 26 | 6.2 | Intense |
| 27 | 6.2 | Intense |
| 28 | 6.1 | Intense |
| 29 | 6.1 | Intense |
| 30 | 6.1 | Intense |
| 31 | 6.0 | Intense |
Hazard calendar for Colorado
In December, Colorado sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Colorado's rainy season runs September–March, when most of the year's rain falls.
Is December a good time to visit Colorado?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in Colorado.
What to pack for Colorado in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Colorado sees daytime highs around 31°C and nights near 22°C. Pack light clothes, rain gear and sun protection. About 17 days see rain.
UV index in Colorado in December
Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Colorado peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 5 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 15 | 15 | 12 | 9 | 7 | 6 | 5 | 7 | 4 | 11 | 13 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | High | Moderate | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 15 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 5 | High |
| Aug | 7 | High |
| Sep | 4 | Moderate |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 13 | Extreme |
Air quality in Colorado in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Colorado is worst in September — around 20 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 7 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) | 8 | 8 | 8 | 9 | 10 | 10 | 10 | 14 | 20 | 14 | 7 | 7 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 8 | Good |
| Apr | 9 | Good |
| May | 10 | Good |
| Jun | 10 | Good |
| Jul | 10 | Good |
| Aug | 14 | Moderate |
| Sep | 20 | Moderate |
| Oct | 14 | Moderate |
| Nov | 7 | Good |
| Dec | 7 | Good |
Where is Colorado?
Colorado sits at 22.8°S, 52.0°W, 444 m above sea level, in Brazil. The nearest listed city is Teodoro Sampaio, 39 km away.
Topography around Colorado
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Colorado.
Within 3 km, the terrain around Colorado has only modest variations in elevation — a maximum elevation change of 139 m around an average of 421 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 235 m; within 80 km, significant variations in elevation — a maximum elevation change of 551 m.
The land around Colorado is covered by grassland (38%) and cropland (38%) within 3 km, cropland (62%) and grassland (25%) within 16 km, and cropland (57%) and grassland (26%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- 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 Colorado (-22.8375°, -51.9731°, elevation 444 m), 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).