Monthly Climate Summary

December 2020 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

32.4°F

Normal: 30.5°F
Departure: + 1.9°F

Total Precipitation

2.73 in

Normal: 3.26 in
Departure: -0.53 in

Total Snowfall

25.7 in

Normal: 13.3 in
Departure: + 12.4 in

Warmest Day

58°F

December 1st

Coldest Day

-2°F

December 19th

Wettest Day

0.92 in

December 17th

Snowiest Day

22.0 in

December 17th

December 2020 Daily Summary
Day Weather High Temperature Low Temperature Precipitation Snowfall
1st Rain Shower 58°F 38°F 0.16 in 0.0 in
2nd Light Snow 40°F 34°F 0.00 in 0.0 in
3rd Mostly Sunny 47°F 27°F 0.00 in 0.0 in
4th Overcast 51°F 35°F 0.00 in 0.0 in
5th Rain 41°F 35°F 0.14 in 0.0 in
6th Mostly Cloudy 35°F 28°F 0.00 in 0.0 in
7th Mostly Cloudy 33°F 26°F 0.00 in 0.0 in
8th Snow Flurries 29°F 24°F 0.00 in 0.0 in
9th Light Snow 36°F 23°F 0.03 in 0.5 in
10th Mostly Cloudy 43°F 33°F 0.00 in 0.0 in
11th Mostly Cloudy 49°F 27°F 0.00 in 0.0 in
12th Rain 48°F 29°F 0.01 in 0.0 in
13th Rain 51°F 38°F 0.01 in 0.0 in
14th Snow Shower 38°F 33°F 0.01 in 0.0 in
15th Sunny 34°F 22°F 0.00 in 0.0 in
16th Snow Shower 22°F 14°F 0.20 in 2.0 in
17th Snow 24°F 16°F 0.92 in 22.0 in
18th Partly Cloudy 25°F 6°F 0.00 in 0.0 in
19th Mostly Cloudy 25°F -2°F 0.00 in 0.0 in
20th Light Snow 34°F 17°F 0.01 in 0.2 in
21st Mostly Cloudy 40°F 31°F 0.00 in 0.0 in
22nd Mostly Cloudy 39°F 28°F 0.00 in 0.0 in
23rd Mostly Cloudy 39°F 24°F 0.00 in 0.0 in
24th Rain 52°F 35°F 0.33 in 0.0 in
25th Snow 57°F 33°F 0.88 in 1.0 in
26th Mostly Cloudy 33°F 21°F 0.00 in 0.0 in
27th Partly Cloudy 36°F 22°F 0.00 in 0.0 in
28th Light Snow 41°F 30°F 0.00 in 0.0 in
29th Partly Cloudy 37°F 19°F 0.00 in 0.0 in
30th Rain 35°F 17°F 0.03 in 0.0 in
31st Overcast 39°F 34°F 0.00 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

1,011.0

Normal: 1,069.0
Departure: -58.0

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

26

Days That Stayed Below Freezing

5

Freezing Nights (Low Below 32°F)

21

Days with Precipitation

12

Days with
Snowfall

5

Wind Summary

Monthly wind averages, peak gusts, and dominant direction

Average Wind Speed

1.7 mph

Peak Wind Gust

25 mph

Dominant Wind Direction

NW

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.