...that a northern "Summer" is a joke!
I just looked at the weather forecast for my hometown in Illinois -- there are a few days when it actually breaches 80 *gasp*. And they regularly dip into the low 60's and even high 50's at night.
During the first week of August!
Here in Texas for the same time period we'll be breaching 100 more days than not, and it doesn't go below 74 at night.
Now I understand where all those articles that say, "Open your windows at night and close them during the day -- save on cooling costs!" are getting their ideas. They must live up north.
I also understand why my mom's rule was, "You can swim as long as the temperature is 80 or higher." I remember calling the "time & temperature" phone number countless times during my childhood, hoping it would be past that magical number.
80 is really quite cold though for swimming. But if the bar had been any higher, we'd NEVER have been able to swim!
NOTE: When I say "swim", I mean "go outside in a swimsuit and get wet". We never had more than a $10 kiddie pool, and sometimes not even that. We'd jump through a sprinkler, squirt each other with the hose, etc.