Washington, DC Climate in December

Temperature for December

In Washington, DC during December the average high temperature is 48.1°F. The hottest day on record was December 7, 1998 when the temperature recorded was 78.1°F.

Washington, DC daily average and extreme temperature range for December

Low Temperature

During December the overnight temperature drops to an average of 32.2°F, with the lowest temperature of 1.9°F being recorded on December 21, 1942. On average there are 3 days in December when the temperature stays below freezing all day. In the worst December there were 9 days when the temperature did not make it above freezing. Overnight temperatures drop below freezing between 2 and 30 times in December.

Precipitation for December

In December the average monthly rainfall in Washington, DC is 1.75 inches with rain usually falling on between 9 and 10 days. 1937 was the driest December with only 0.00 inches of rain falling, and 2009 was the wettest December with 6.16 inches of rain. The wettest single day in December was 5 December 1993 when 2.54 inches of rain fell.

In December it usually snows on between 3 and 4 days. In December there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in December.

  BENCHMARKS  
Loading Time: Base Classes  0.0076
Controller Execution Time ( Climate / Summary )  0.1174
Total Execution Time  0.1250
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  URI STRING  
climate/summary/united-states/district-of-columbia/ronald-reagan-washington-natl/december
  CLASS/METHOD  
climate/summary
  DATABASE:  xrssweather0-climatespy   QUERIES: 11  (Hide)
0.0006   SELECT `locationId`, `cityName`, `urlName`, `urlState`, `stateName`, `stateCode`, `StationName`, `countryName`, `urlCountry`, `dd1`.`year` as earliestYear, `dd1`.`monthNo` as earliestMonth, `dd1`.`dayNo` as earliestDay, `dd2`.`year` as latestYear, `dd2`.`monthNo` as latestMonth, `dd2`.`dayNo` as latestDay
FROM 
(`dimLocation`)
JOIN `dimDatedd1 ON `dimLocation`.`beginDateId` = `dd1`.`dateId`
JOIN `dimDatedd2 ON `dimLocation`.`endDateId` = `dd2`.`dateId`
WHERE `urlState` =  'district-of-columbia'
AND `urlName` =  'ronald-reagan-washington-natl'
LIMIT 1 
0.0008   SELECT `monthNo`, AVG(`meanMinTemp`) AS meanMinTempAVG(`meanMaxTemp`) AS meanMaxTemp
FROM 
(`aggMonthly`)
WHERE `monthNo` =  12
AND `locationId` =  '2892'
GROUP BY `monthNo
0.0008   SELECT `monthNo`, AVG(`meanMinTemp`) AS meanMinTempAVG(`meanMaxTemp`) AS meanMaxTemp
FROM 
(`aggMonthly`)
WHERE `monthNo` =  12
AND `locationId` =  '2892'
GROUP BY `monthNo
0.0052   SELECT `maxTemp`, `monthName`, `dayNo`, `dimDate`.`year`, `dimLocation`.`locationId`, `dimLocation`.`countryName`, `dimLocation`.`stateName`, `dimLocation`.`presentationName`, `dimLocation`.`urlCountry`, `dimLocation`.`urlState`, `dimLocation`.`urlName`
FROM (`aggMonthly`)
JOIN `dimLocationON `dimLocation`.`locationId` = `aggMonthly`.`locationId`
JOIN `dimDateON `dimDate`.`dateId` = `aggMonthly`.`maxTempDate`
WHERE `aggMonthly`.`locationId` =  '2892'
AND `dimDate`.`monthNo` =  12
ORDER BY 
`maxTempdesc
LIMIT 1 
0.0023   SELECT `minTemp`, `monthName`, `dayNo`, `dimDate`.`year`, `dimLocation`.`locationId`, `dimLocation`.`countryName`, `dimLocation`.`stateName`, `dimLocation`.`presentationName`, `dimLocation`.`urlCountry`, `dimLocation`.`urlState`, `dimLocation`.`urlName`
FROM (`aggMonthly`)
JOIN `dimLocationON `dimLocation`.`locationId` = `aggMonthly`.`locationId`
JOIN `dimDateON `dimDate`.`dateId` = `aggMonthly`.`minTempDate`
WHERE `aggMonthly`.`locationId` =  '2892'
AND `dimDate`.`monthNo` =  12
ORDER BY 
`minTempasc
LIMIT 1 
0.0327   select min(count_days) as min_daysavg(count_days) as average_daysmax(count_days) as max_days  from (select yearcount(*) as count_days from factDaily fd  join dimDate dd on (dd.dateId fd.DateId) where fd.locationId 2892 and minTemp <= 32  and dd.monthNo 12 group by year) as count_freezing 
0.0376   select min(count_days) as min_daysavg(count_days) as average_daysmax(count_days) as max_days  from (select yearcount(*) as count_days from factDaily fd  join dimDate dd on (dd.dateId fd.DateId) where fd.locationId 2892 and maxTemp <= 32  and dd.monthNo 12 group by year) as count_freezing 
0.0008   SELECT AVG(`sumRainfall`) AS sumRainfallAVG(`daysRainfall`) AS daysRainfallAVG(`daysSnow`) AS daysSnowAVG(`daysTornado`) AS daysTornadoAVG(`daysThunder`) AS daysThunder, `monthNo`
FROM (`aggMonthly`)
WHERE `monthNo` =  12
AND `locationId` =  '2892'
GROUP BY `monthNo
0.0034   SELECT `sumRainfall`, `daysRainfall`, `year`
FROM (`aggMonthly`)
WHERE `monthNo` =  12
AND `locationId` =  '2892'
ORDER BY `sumRainfallasc
LIMIT 1 
0.0006   SELECT `sumRainfall`, `daysRainfall`, `year`
FROM (`aggMonthly`)
WHERE `monthNo` =  12
AND `locationId` =  '2892'
ORDER BY `sumRainfalldesc
LIMIT 1 
0.0023   SELECT `maxRainfall`, `monthName`, `dayNo`, `dimDate`.`year`, `dimLocation`.`locationId`, `dimLocation`.`countryName`, `dimLocation`.`stateName`, `dimLocation`.`presentationName`, `dimLocation`.`urlCountry`, `dimLocation`.`urlState`, `dimLocation`.`urlName`
FROM (`aggMonthly`)
JOIN `dimLocationON `dimLocation`.`locationId` = `aggMonthly`.`locationId`
JOIN `dimDateON `dimDate`.`dateId` = `aggMonthly`.`maxRainfallDate`
WHERE `aggMonthly`.`locationId` =  '2892'
AND `dimDate`.`monthNo` =  12
ORDER BY 
`maxRainfalldesc
LIMIT 1 
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