Monthly Climate Summary

December 2009 Summary

Snow Shower 32°F

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

Monthly Climate Summary

Observed averages, totals, and departures from normal

Average Temperature

26°F

Normal: 30.5°F
Departure: -4.5°F

Total Precipitation

3.26 in

Normal: 3.26 in
Departure: + 0.45 in

Total Snowfall

14.7 in

Normal: 13.3 in
Departure: + 1.4 in

December 2009 Daily Summary
Day Weather High Temperature Low Temperature Precipitation Snowfall
1st Snow Shower 38°F 23°F 0.00 in 0.0 in
2nd Rain Shower 47°F 27°F 0.15 in 0.0 in
3rd Rain 60°F 43°F 0.77 in 0.0 in
4th partly cloudy 46°F 31°F 0.13 in 0.0 in
5th Snow 36°F 29°F 0.26 in 3.5 in
6th Snow Shower 32°F 20°F 0.00 in 0.0 in
7th Overcast 31°F 19°F 0.00 in 0.0 in
8th Snow Shower 36°F 24°F 0.01 in 0.1 in
9th Snow 36°F 25°F 0.99 in 8.2 in
10th Snow flurries 36°F 22°F 0.00 in 0.0 in
11th mostly cloudy 25°F 16°F 0.00 in 0.0 in
12th partly cloudy 31°F 9°F 0.00 in 0.0 in
13th Wintry Mix 36°F 6°F 0.26 in 0.2 in
14th mostly cloudy 41°F 31°F 0.00 in 0.0 in
15th Snow Shower 41°F 31°F 0.02 in 0.0 in
16th Snow Shower 31°F 20°F 0.00 in 0.0 in
17th Sunny 20°F 6°F 0.00 in 0.0 in
18th mostly cloudy 17°F 0°F 0.00 in 0.0 in
19th Overcast 20°F 5°F 0.00 in 0.0 in
20th mostly cloudy 25°F 18°F 0.00 in 0.0 in
21st mostly cloudy 28°F 17°F 0.00 in 0.0 in
22nd mostly cloudy 22°F 13°F 0.00 in 0.0 in
23rd Snow Shower 18°F 13°F 0.02 in 1.0 in
24th mostly cloudy 29°F 19°F 0.00 in 0.0 in
25th Overcast 27°F 24°F 0.00 in 0.0 in
26th Wintry Mix 39°F 26°F 0.33 in 0.8 in
27th Rain Shower 44°F 28°F 0.68 in 0.0 in
28th Snow Shower 35°F 26°F 0.00 in 0.0 in
29th Snow Shower 28°F 6°F 0.00 in 0.0 in
30th mostly cloudy 25°F 9°F 0.00 in 0.0 in
31st Light Snow 28°F 21°F 0.09 in 0.9 in

Degree Day Summary

Heating and cooling degree days (base 65°F)

Heating Degree Days

1,207.5

Normal: 1,069.0
Departure: + 138.5

Cooling Degree Days

0.0

Normal: 0.0
Departure: + 0.0

All-time Monthly Records

Highest and lowest observed extremes for this month

Record High

72°F

Set in 2015

Record Low

-22°F

Set in 1969

Record Precipitation

3.16 in

Set in 1952

Record Snowfall

19.7 in

Set in 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.