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Friday, December 2, 2011

December Preview

My new addiction is weatherspark.com. The site takes boring weather stats and turns them into easy-to-read (pretty) weather charts and graphs.

The month of December is characterized by falling daily high temperatures (thank you captain obvious). Daily high temps decreasing from 46°F to 38°F over the course of the month. Daily low temperatures range from 24°F to 31°F.

Daily High and Low Temperature in December
The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Fraction of Time Spent in Various Temperature Bands in DecemberThe average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F). Notice the average amount of time we spend below freezing increases throughout the month.

Types of Precipitation Throughout December Relative frequency of various types of precipitation over the course of a typical December.

Light rain is the most severe precipitation observed during 29% of those days with precipitation. It is most likely around December 1, when it is observed during 17% of all days.

Light snow is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around December 31, when it is observed during 18% of all days.

Moderate rain is the most severe precipitation observed during 16% of those days with precipitation. It is most likely around December 2, when it is observed during 9% of all days.

Moderate snow is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around December 31, when it is observed during 8% of all days.

Probability of Snow Fall Being Reported in a Given Day in December

The likelihood of snow falling is highest around December 31, occurring in 28% of days.

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