10 AM MDT, Saturday, September 22, 2018
In the mountain time zone the autumnal equinox is this evening at 7:54 PM. So happy autumn!
The calendar might say autumn, but afternoon temperatures this weekend will continue to be more like summer. A change in the pattern will make the north-central United States much cooler next week. Although the Front Range won’t get cold, temperatures are expected to be more consistent with early autumn beginning Monday.
It would be nice to get some rain with the change to less warm weather. There is a small chance for rain early next week, but like the last cold front, the rain will probably be spotty and many areas will receive very little.
We are not yet being threatened by a cold air mass likely to bring widespread frosts to the northeastern plains. However, some of the valley locations that have a reputation for getting colder than everyone else (you probably know who you are) might see some frosty temperatures Tuesday or Wednesday morning.