Monthly Climate Summary

December 2021 Summary

Light Snow 34°F

Data is available from 2005 to present. The latest summary is available the first week of each month.

Monthly Climate Summary

Observed averages, totals, and departures from normal

Average Temperature

35.1°F

Normal: 30.5°F
Departure: + 4.6°F

Total Precipitation

2.62 in

Normal: 3.26 in
Departure: -0.64 in

Total Snowfall

3.5 in

Normal: 13.3 in
Departure: -9.8 in

Warmest Day

58°F

December 16th

Coldest Day

15°F

December 20th

Wettest Day

0.60 in

December 25th

Snowiest Day

1.5 in

December 8th

December 2021 Daily Summary
Day Weather High Temperature Low Temperature Precipitation Snowfall
1st Mostly Cloudy 40°F 30°F 0.00 in 0.0 in
2nd Thunderstorm 47°F 33°F 0.25 in 0.0 in
3rd Partly Cloudy 41°F 25°F 0.00 in 0.0 in
4th Mostly Cloudy 40°F 26°F 0.00 in 0.0 in
5th Mostly Cloudy 43°F 31°F 0.00 in 0.0 in
6th Rain Shower 53°F 37°F 0.08 in 0.0 in
7th Snow Shower 37°F 27°F 0.00 in 0.0 in
8th Light Snow 33°F 25°F 0.08 in 1.5 in
9th Mostly Cloudy 33°F 24°F 0.00 in 0.0 in
10th Snow Shower 43°F 28°F 0.00 in 0.0 in
11th Rain 57°F 31°F 0.51 in 0.0 in
12th Partly Cloudy 45°F 31°F 0.00 in 0.0 in
13th Mostly Sunny 51°F 29°F 0.00 in 0.0 in
14th Mostly Sunny 48°F 30°F 0.00 in 0.0 in
15th Rain Shower 42°F 24°F 0.18 in 0.0 in
16th Rain Shower 58°F 42°F 0.23 in 0.0 in
17th Mostly Sunny 57°F 35°F 0.00 in 0.0 in
18th Wintry Mix 37°F 33°F 0.36 in 0.2 in
19th Rain Shower 34°F 18°F 0.02 in 0.0 in
20th Mostly Sunny 31°F 15°F 0.00 in 0.0 in
21st Mostly Cloudy 41°F 24°F 0.00 in 0.0 in
22nd Mostly Cloudy 42°F 28°F 0.00 in 0.0 in
23rd Partly Cloudy 29°F 19°F 0.00 in 0.0 in
24th Light Snow 29°F 22°F 0.08 in 1.3 in
25th Rain 35°F 28°F 0.60 in 0.0 in
26th Rain Shower 40°F 33°F 0.06 in 0.0 in
27th Mostly Cloudy 33°F 27°F 0.00 in 0.0 in
28th Wintry Mix 43°F 30°F 0.06 in 0.5 in
29th Drizzle 37°F 33°F 0.01 in 0.0 in
30th Drizzle 44°F 35°F 0.03 in 0.0 in
31st Rain 45°F 37°F 0.07 in 0.0 in
Legend and Icon Key
Warmest High
Coldest Low
Wettest Day
Snowiest Day
Sunny Mostly Sunny Partly Cloudy Mostly Cloudy Overcast Rain Light Rain Rain Shower Drizzle Freezing Rain Snow Light Snow Snow Shower Snow Flurries Sleet Rain & Snow Wintry Mix Thunderstorm Haze

Degree Day Summary

Heating and cooling degree days (base 65°F)

Heating Degree Days

926.0

Normal: 1,069.0
Departure: -143.0

Cooling Degree Days

0.0

Normal: 0.0
Departure: + 0.0

Climate Activity Summary

Key temperature and precipitation patterns for the month

Days at or
Above 90°F

0

Days Above Freezing

28

Days That Stayed Below Freezing

3

Freezing Nights (Low Below 32°F)

22

Days with Precipitation

15

Days with
Snowfall

4

Wind Summary

Monthly wind averages, peak gusts, and dominant direction

Average Wind Speed

1.8 mph

Peak Wind Gust

32 mph

Dominant Wind Direction

WNW

All-time Monthly Records

Highest and lowest observed extremes for this month

Warmest Day

72°F

December 24th, 2015

Coldest Day

-22°F

December 25th, 1969

Wettest Day

3.16 in

December 11th, 1952

Snowiest Day

19.7 in

December 17th, 2020

Climate Context

How this month compares to typical conditions

Monthly climate summaries compare observed weather to long‑term normals. Positive temperature departures indicate warmer‑than‑normal conditions, while negative departures reflect cooler‑than‑normal patterns. Precipitation and snowfall departures help highlight unusually wet, dry, or snowy months across Colonie.