Seattle, WA Climate in September

Temperature for September

In Seattle, WA during September the average high temperature is 71.5°F. The hottest day on record was September 3, 1988 when the temperature hit 98.1°F.

Seattle, WA daily average and extreme temperature range for September

Low Temperature

During September the overnight temperature drops to an average of 51.3°F, with the lowest temperature of 33.4°F being recorded on September 19, 1985. In September it has never frozen overnight.

Precipitation for September

In September the average monthly rainfall in Seattle, WA is 1.89 inches with rain usually falling on between 10 and 11 days. 1993 was the driest September with only 0.03 inches of rain falling, and 1978 was the wettest September with 18.43 inches of rain. The wettest single day in September was 2 September 1978 when 12.13 inches of rain fell.

Tornados are reported on 0 and 1 days in September. In September there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in September.
  BENCHMARKS  
Loading Time: Base Classes  0.0083
Controller Execution Time ( Climate / Summary )  0.0902
Total Execution Time  0.0986
  GET DATA  
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  MEMORY USAGE  
2,293,004 bytes
  POST DATA  
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  URI STRING  
climate/summary/united-states/washington/seattle-tacoma-intl/september
  CLASS/METHOD  
climate/summary
  DATABASE:  xrssweather0-climatespy   QUERIES: 11  (Hide)
0.0008   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` =  'washington'
AND `urlName` =  'seattle-tacoma-intl'
LIMIT 1 
0.0007   SELECT `monthNo`, AVG(`meanMinTemp`) AS meanMinTempAVG(`meanMaxTemp`) AS meanMaxTemp
FROM 
(`aggMonthly`)
WHERE `monthNo` =  9
AND `locationId` =  '4762'
GROUP BY `monthNo
0.0007   SELECT `monthNo`, AVG(`meanMinTemp`) AS meanMinTempAVG(`meanMaxTemp`) AS meanMaxTemp
FROM 
(`aggMonthly`)
WHERE `monthNo` =  9
AND `locationId` =  '4762'
GROUP BY `monthNo
0.0020   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` =  '4762'
AND `dimDate`.`monthNo` =  9
ORDER BY 
`maxTempdesc
LIMIT 1 
0.0038   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` =  '4762'
AND `dimDate`.`monthNo` =  9
ORDER BY 
`minTempasc
LIMIT 1 
0.0243   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 4762 and minTemp <= 32  and dd.monthNo 9 group by year) as count_freezing 
0.0240   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 4762 and maxTemp <= 32  and dd.monthNo 9 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` =  9
AND `locationId` =  '4762'
GROUP BY `monthNo
0.0007   SELECT `sumRainfall`, `daysRainfall`, `year`
FROM (`aggMonthly`)
WHERE `monthNo` =  9
AND `locationId` =  '4762'
ORDER BY `sumRainfallasc
LIMIT 1 
0.0007   SELECT `sumRainfall`, `daysRainfall`, `year`
FROM (`aggMonthly`)
WHERE `monthNo` =  9
AND `locationId` =  '4762'
ORDER BY `sumRainfalldesc
LIMIT 1 
0.0020   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` =  '4762'
AND `dimDate`.`monthNo` =  9
ORDER BY 
`maxRainfalldesc
LIMIT 1 
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