A warmer than usual December in the Tri-Cities is expected by the National Weather Service, after a November with both unusually warm and unusually cold days.
Normal highs for the Tri-Cities in December fall from 44 at the start of the month to 39 at the end of the month. Normal lows fall from 32 to 28.
Precipitation for December should be near the normal of 1.13 inches, according to the weather service.
Two arctic fronts moved over the Tri-Cities in November. But more daily records were set for unseasonably warm weather than cold weather, as measured at the Hanford Meteorology Station, where daily temperature records have been collected back to World War II.
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The most recent record was Thanksgiving Day, when the high of 66 at Hanford was warmer than the previous record of 63 set in 1966.
Other Hanford weather records set or tied include:
• On Nov. 4 the low temperature of 50 was the warmest on record for the date. It beat the previous record of 46, which was most recently recorded two years ago.
• On Nov. 5 the low temperature of 48 tied the previous record set in 1988 for the warmest low temperature for the date.
• On Nov. 18 the low temperature of 20 was a record low for the date. The previous coldest temperature on that date was 25 in 1955.
• On Nov. 17 the low temperature of 10 tied the cold weather record for the date set in 1961.
Temperatures for November in the Tri-Cities averaged 1 degree below normal, due mostly to some unusually cold overnight lows. High temperatures averaged just 0.1 degree below normal but low temperatures averaged 2 degrees below normal.
The coldest temperature in November was 13 degrees on the last day of the month, but the day before the high reached 66. In the first week of the month the high reached 69, as measured in Kennewick.
Lows were in the teens on five days and on three days the high temperature failed to reach freezing, according to the weather service.
Temperatures for the autumn months of September through November at Hanford averaged 1.9 degrees above normal, according to the Hanford Meteorological Service. That was despite November, when temperatures were 2.7 degrees below normal at Hanford.
The weather service reported 0.1 inch of snow in the Tri-Cities in November. At Hanford 0.9 inch was recorded, which was below the normal of 2 inches for November.
Total precipitation in the Tri-Cities was 0.43 inch, which was a little less than half of normal. At Hanford precipitation totaled 0.38 inch, or 40 percent of normal.
Precipitation for the year in the Tri-Cities has reached 4.31 inches, which is 2.29 inches below normal. Precipitation for the autumn months at Hanford came to 1.31 inches, which is 75 percent of normal.
The peak wind gust in the Tri-Cities, as measured in Kennewick, was 46 mph on the day after Thanksgiving. At Hanford it was 56 mph on the same day.