Fall makes a comeback this weekend
Highs have been well above normal for much of this week, but that's about to change. A cold front will cross the area on Saturday and deliver some much cooler, drier air.Posted — Updated
Highs have been well above normal for much of this week, but that’s about to change. A cold front will cross the area on Saturday and deliver some much cooler, drier air.
We have lows in the 40s in the forecast for Monday morning! There may even be a few spots that drop into the upper 30s for the first time since last spring.
Our normal low for this time of year is 51, but we are getting close to our first average freeze date. The average freeze date for RDU is the first week of November.
The earliest 32-degree temperature at RDU in the fall is Oct. 2, 1947 and the latest is December 3, 1931. Our warming climate means those first frosts are coming later than they used to.
Of course, the fall is the end of the growing season and whether you’re a farmer or a backyard gardener, you want to know when it’s time to put the garden to bed for the winter.
The National Weather Service may issue one of several advisories when our temperatures are forecasted to fall near or below freezing in the fall:
Once an area reaches freezing, the NWS no longer issues the advisories because it’s understood that the growing season has ended and more freezing temperatures are on the way until spring.
As our climate warms, we see these freezing temperatures coming later in the fall and ending earlier in the spring. This is true across the country.
According to the EPA, the growing season is two weeks longer now than it was 100 years ago. There are benefits to that. Farmers can grow food longer and days with dangerous winter conditions are fewer. There are downsides too. The allergy season is longer and we see more days with mosquitoes and ticks.
For now we have some cool fall weather in our forecast. I’m looking forward to throwing on a sweater!