It is a well-known and accepted fact that late summer happens informally on Labor Day weekend.
For meteorologists, summer will end on August 31, while for astronomers and the rest of the world (Northern Hemisphere), summer will end on September 22 at the vernal equinox.
No matter what date you use as a bookmark for the end of summer, should we use any date to determine when our water fun in the sun ends?
If we did not use arbitrary dates to determine when the summer season ended, what would we use? The average last date for 80 degrees weather? Should the swimming pool be closed when the high temperature in the afternoon reaches more than 60 degrees?
All this requires debate, and in order to have a good debate, you need to understand the situation. Here are a few notable weather threshold dates that can be considered when considering the summer pool schedule.
For example, if Denver uses the date with an average temperature of 80 degrees on the last day as the date when the swimming pool is closed, the swimming pool will be closed on October 11.
Average last day of 80 degree weather around Denver
Denver: October 11
Boulders: October 9
Brighton: October 18
Longmont: October 15
Fort Collins: October 10
Loveland: October 16
century: October 11
Littleton: October 13
In theory, using these dates, the swimming pool will be closed more than a month later than Labor Day. Days with temperatures in the 1980s seem to be good days for swimming pools. Of course, there is a lot of logistics to keep the swimming pool open, but if the swimming pool is going to be open during the hot months, it means that it will still be hot throughout September.
So, what if we switch to a day with an average of 75 degrees in the past?
Average last day of 75 degree weather around Denver
Denver: October 27
Boulders: October 27
Brighton: November 1
Longmont: October 27
Fort Collins: October 29
Loveland: November 2
century: October 30
Littleton: November 3
At this point, these dates are a bit into the cool season. If the average maximum temperature is 75 degrees, it means that there are many days when the temperature is below that temperature. On the other hand, this also means that there are still some warm days, if not very hot. However, entering the swimming pool in November does seem counterintuitive.
Okay, the last one. When will the average high temperature in Denver and its surrounding areas drop below 70 degrees? Some cheeky people may like to swim in 60 degrees weather-especially on sunny days-but this threshold starts to enter a field, and if a cold day occurs, the situation may not be so good. This may be this time of the year.
Average last day of 70 degree weather around Denver
Denver: November 15
Boulders: November 15
Brighton: November 18
Longmont: November 15
foot. Collins: November 10
Loveland: November 11
century: November 11
Littleton: November 15
The opening of the swimming pool in November means that overnight lows drop to the 50s and 40s most nights, and to the 30s on other nights. Water can be heated and cooled very efficiently, but on warm days when the temperature is close to 70 degrees, after a night in your 40s, the swimming pool may not be heated as you would expect. It is safe to say that the closing of the swimming pool will definitely be postponed, but when will it be postponed? This is where the problem lies.
Maybe it’s not about how hot it is, but how cold it is. The average date of first freezing in Denver and surrounding areas may be a key date to consider. Not only does the sprinkler system need to be blown out before this, but also a container filled with water in cold weather will not completely scream in a pool day.
It is necessary to prepare for the winter before the first freezing to minimize damage to the pipeline. It is worth noting that as early as the beginning of September, the subway had already recorded freezing temperatures.
Average date of first freezing temperature near Denver
Denver: October 7
Boulders: October 6
Brighton: October 3
Longmont: September 27
Fort Collins: October 2
Loveland: September 30
century: October 3
Littleton: October 3
The same information can also be viewed at the beginning of the season. Should the swimming pool open on Memorial Day or should it open earlier? Either way, it will be nice to enter the pool while the temperature is still in the 80s and 90s.
The bookend date used in the pool season works well. It makes planning easy. But what if we use a different arbitrary date related to the local weather instead of a holiday weekend?