Cooldown Coming To Vermont (Eventually) But No Throwback To "Frigid' Augusts Of The Past

If you're tired of the smoky, hazy, hot air we've experienced
in Vermont this summer, I present you with this image
of a crystal clear, clean frosty day, taken Feb. 4, 2021.

 We've still got a few more warm days to go before the strongest cold front since early June blows in on Sunday. 

Dry weather will mostly continue, keeping me concerned that a flash drought is starting. At the very least, Vermont will remain abnormally dry. 

The drying trend will continue big time today.   We can expect sunshine, warm temperatures and very dry air.  

The dew point - a rough measure of how humid it is out there, will stay relentlessly low today. Those dew points could fall into the upper 40s this afternoon which is quite arid for an August afternoon in Vermont.

We've still got a quick squirt of very warm to hot air coming in Saturday. The warmer valleys could reach 90 degrees which might well be the final day this year of 90 degree heat. We don't know for sure, of course, as sometimes we get heat waves into the first half of September.

The humidity will only rise modestly, so our crops and gardens will continue to get more and more parched. 

The cold front Sunday means business, but only in terms of temperature. At this point, rainfall looks lame with it, amounting to a quarter inch or less. Maybe a little more than that north, maybe a little less south. A few pinpoint places could get a little more in local downpours, but it won't be anything exciting. 

You'll certainly notice the temperature drop behind the cold front.  You'll feel it cooling off quite a bit  later in the day Sunday. By Monday, highs will only make it to within a few degrees of 70. Monday night will be in the 40s for most of us. 

There's a slight chance we'll get lucky and the cold front will stall just to our south. If that happens, a storm might form along it and give us a little more rain Tuesday. Especially south. But that scenario is iffy at this point. I'm not holding my breath yet for any showers then.

It will only slowly warm up the rest of next week, but still stay slightly cooler than average. Nothing unusual for August. We will be nowhere in the league of notable chilly Augusts of the past.  

PAST COLD AUGUSTS

The Death Valley heat earlier in the week was definitely a bit much.  But let's face it, at least we're getting a summer.  They're kind of short here in Vermont, even with climate change, but you want to at least get through most of June, July and August with at least several days of beach weather. 

It wasn't always like this.  We've had our share of disappointing Augusts that masqueraded  as Septembers.  

It started in the cold summer of 1962, when August four consecutive days mid month in which highs never got out of the mid-60s. 

Then came 1963. That year, only seven August days made it as high as 80 degrees, with the warmest being 84.. (For comparison, this year, we're only halfway through the month and Burlington has had 14 days that were at least 80 degrees.  

In 1963, eight days never made it to 70 degrees. One day, the 13h had a low of 46 a high of just 59 with over a half inch of rain. In other words, a somewhat raw October day in the middle of August .

The next year, August, 1964, brought slightly warmer afternoons, but way to chilly nights. Fifteen mornings that month in Vermont's banana belt of Burlington got under 50 degrees. On both August 1 and August 7, there was frost in some of the cold hollows of Vermont. On August 1, the temperature got down to 30 in South Londonderry and 32 in both Chelsea and Somerset.   

August, 1965 brought some summer weather early in the month, but fall made a very strong, early showing toward the end. Daytime temperatures stayed in the 50s for the final three days of the August, 1965  culminating in a hard freeze in some spots on August 31,

It got down to 25 degrees in South Londonderry, 26 in West Burke and 27 in Northfield. 

For the remainder of the 1960s ,each August was also cooler than normal, but not as bad as the years I mentioned here.

I don't know why 1960s summers were so chilly. It could have been just a natural cycle. Particulate and sulfur pollution in that era might have blunted the warmth of the sun a bit, too.  

Now that climate change has taken hold, it's highly unlikely we'll have such cold Augusts that we had in the 1960s. We'll still have relatively chilly Augusts from time to time. After all, climate change has not stopped weather patterns from bringing cooler air down from Canada. 

But that climate change has altered our perspective of summers. Actually the whole year.  The chances for hot Augusts, or hot any month are way up. For August, the top four hottest Augusts in Burlington have all happened since 2016. 

Burlington has 15 years in the top ten list of hottest summers due to ties. (Measured as temperatures between June 1 an August 31).  Eight of those hottest summers have happened since 2005, and there's a chance this summer might join this list. 

As I always like to say, this ain't your grandfather's climate.