Daily vs. Seasonal Temperature Changes

    Posted by Mike Bonner

    Apr 20, 2016 9:40:59 AM

    I often get the comment:

    “I understand the issues associated with the big changes from season-to-season, but the changes from day-to-day are gradual.  Isn’t it pretty easy to compensate for those?”

    And then, mother nature comes along and provides the perfect demonstration of the issue.

    It’s Spring in the Midwest!

    And you know what that means…


    And weird weather.

    On Sunday, one of my colleagues and I drove to Pittsburgh.  It was 34°F and 6” of snow fell.  It was a miserable trip.

    On Monday, we completed our business and drove home.  It was 59°F and sunny. 

    Oh, what a difference a day makes!

    And I hear what you’re thinking.  “Mike, you live in the Midwest.  You’re used to the seasons and the changes that go along with them.”  And that’s true.  In fact, the graph below shows that the average daily temperature swing here in the Midwest is on the order of 20°F!  And that makes it a roller-coaster for anybody with a process that requires a stable temperature to perform properly.  And in this part of the rust-belt, there’s a lot of them.


    But California’s Different!

    Ah yes!  The West Coast!  The sun, the sand, the ocean.  California has it all, to be sure.  Renowned for its weather, surely LA is a respite from this cyclical mess.  That’s why the stars go there, isn’t it?

    The reality is, no.  If we look at the same average temperature data for Los Angeles, we can see that the average temperature change from morning to evening is still between 15°F – 20°F year-round!


    By now you’ve figured out that both of these places are on the water.  And you may be thinking it’s the water that’s causing these big temperature swings.  And that’s a pretty good theory!

    It’s Always Hot in Phoenix!

    So, with its desert location, Phoenix is a place known for always being hot and dry.  In fact, this makes it a mecca for people with allergies and other breathing problems.  They have to pipe in water, and their air conditioning runs continuously – day and night.  Surely, this is a place where we can count on the temperature to be constant, right?

    Let’s look at the chart.  While the average temperatures here are considerably warmer, the swing throughout the day still averages 20°F or more.  In fact, the desert climate is known for wide temperature swings, and we can see that in the months of April, May and June, the average swing exceeds 25°F!


    It’s the Same Everywhere

    We recently did a project in Saudi Arabia.  A perfect example of a desert climate.  Ask anybody to name three places in the desert and chances are pretty good that this will make their list!

    That being said, just like Phoenix, we still see temperature swings on the order of 25°F.  And compared to the relatively short season in Arizona, in Saudi Arabia these conditions continue from May through October!


    So what about London?  Always moderate and rainy there.  You have to “pack a mack” in the middle of summer!


    But again, while the data shows the swing may be as low as 10°F in December and January, the rest of the year is right around the 20°F differential from day to night. 

    Same for Sydney.

    And for Cape Town.


    There’s No Getting Around It!

    So, by now you’ve probably figured out that you just have to accept it.  On this planet, there are big swings in temperature from day-to-night, as well as from season-to-season.  And as the demands on your dispensing process get more extreme, your need to manage this variation is going to grow proportionately.

    Sounds like you’ve got some work to do…

    Download our free Process Excellence Diagnostic to more closely evaluate the operation costs, maintenance, overall performance, and product quality of your printing process.

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