Weather on December 21

Alamosa, CO

55 Years of Data

Avg High
36°F
Avg Low
0°F
Warmest
2010
40°F avg
Coldest
2012
-4°F avg

About This Date

December 21st in Alamosa, CO typically brings cold winter weather, with average highs around 36°F and lows near 0°F — a 36°F daily swing. Over 55 years of records, the warmest December 21st was in 2010 (40°F average), while the coldest was 2012 (-4°F) — a 44°F range across recorded history. Precipitation has occurred on 13% of recorded December 21st dates, with snow falling 13% of the time (heaviest snowfall: 2.5"). The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.

The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.

Planning for December 21st in Alamosa, CO? Bundle up with warm layers and protect extremities from the cold.

Warming Trend
1.8°F per decade on this date
YearHighLowAvgPrecipSnow
202559°19°39°
202445°24°
202340°19°29°
202234°-4°15°
202147°-3°22°
202037°21°
201933°-8°13°
201845°25°
201753°30°
201629°16°
201542°25°
201441°25°
201333°-4°15°
2012coldest18°-26°-4°
201136°-1°18°
2010warmest49°31°40°
200945°23°
200830°-3°14°
200730°-6°12°
200628°14°0.51"2.5"
200548°28°
200441°18°29°
200347°27°0.08"0.8"
200232°-1°16°
200145°27°
200038°-5°16°
199926°-3°12°
199832°-4°14°0.03"0.3"
199723°-4°10°
199644°26°
199531°-1°15°
199444°24°
199326°-13°
199220°-23°-2°
199122°-4°
199018°-6°
198940°-5°17°
198835°18°0.03"0.2"
198728°14°
198637°22°
198539°-1°19°
198432°-10°11°
198317°11°0.33"1.3"
198248°27°
198148°25°36°0.15"1"
198044°23°
197944°24°0.03"0.1"
197824°-13°
197729°-8°11°
197629°-12°
197528°15°
197440°20°
197344°-3°21°
197231°-6°13°
197122°-17°
55 years of data from ALAMOSA 1E

Browse Weather History

Weather data provided by NOAA Climate Data Online. Not for critical planning.