Does Seattle Have a Weekend Weather Curse?

Many of you have thought about this.  

And increasingly I am hearing suggestions that it just might be true.

Does Seattle have a weekend weather curse?

With rain, clouds, and cool temperatures on Saturday and Sunday, followed by increasing warmth and sun when we are stuck inside for work or school?

 Let us investigate this terrifying possibility by examining the conditions this spring.

I  began by looking at the high temperatures at Seattle-Tacoma Airport for March, April, and the first 15 days of May.   The results are found below:

Average Weekday High Temperature:    60.4 F
Average Weekend High Temperature:    57.4 F

MY GOD, it's true.  High temperatures have been 3F greater during the week.   Highly significant difference.

My calculator shaking, I found the average amount of precipitation per day during the same period:

Average Daily Precipitation During Weekends:  .35 inches
Average Daily Precipitation During  Weekdays:  .16 inches

This is scary.  More than twice the amount of rainfall per day during the weekends than during weekdays.

I have heard that some folks blame this anomaly on Global Warming. That greater combustion of fossil fuels during weekdays is warming the air both directly and through excessive greenhouse gases.  Or that combustion particles are somehow interfering with natural weather processes.   You can expect headlines in local newspapers and web media when they learn of these ideas.  Particularly one local newspaper.

But the truth is that the origin of this anomaly is beyond science.  Beyond logic.  It is the Godzilla of weather.

Perhaps we have been cursed.  Perhaps we are being punished for some communal sin.

But in any case, my colleagues and I must look for the meteorological silver bullet to end this blight on our communal happiness.

Saturday Update!!

Turns out that Scott Sistek of KOMO TV took my analysis one step further and confirmed the results today in his own blog (found here).  For example, after adding January and February 2014 he found that Saturday was the wettest day of the year.  And going back to 1949 he got the same results!  Don't ask me whether these results are statistically significant, I don't want to get into that.  This is metaphysics not physics.