Jan. 3 Update: Forecast highs and lows (dotted lines) added to daily temperature chart.
Today's updated extended range (2-week) forecast, shown above, from the Climate Prediction Center continues to indicate the probability of cooler than average temperatures in the Mid Atlantic region for the week of January 10 to 16. The prediction calls for a 40-50% chance of cold temperatures during that period centered one week before the Presidential Inauguration. Climatological average temperatures for mid January in Washington, shown in the chart to the right, are a high of 42° and a low of 27°.
For precipitation, there is a 33-40% chance of drier than average conditions. Probabilities of relatively dry weather are 33% or greater for the entire contiguous 48 states, except for the upper Midwest and northern Plains.
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Images (click to enlarge): Average temperature and precipitation forecasts for Jan. 10-16, 2009, from Climate Prediction Center/National Weather Service/NOAA; CapitalClimate chart of daily January temperatures from NWS data, photo background © Kevin Ambrose
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