Which Day Is The Warmest Day Of The Year?

It’s a very warm day across much of the country today so I am sure many of you are wondering when the warmest day of the year is for your area. According to National Centers For Environmental Information (NECI), the average warmest day for the lower-48 varies from June through September (see Fig. 1). Parts of the Southwest and Midwest have already experienced the warmest day on average.

Fig. 1: NECI Map Of Average Warmest Day

For areas that have yet to see the warmest day of the year, it is upon you over the next month. Much of the, South, Southeast, North-central, and Northwest parts of the U.S. will see the warmest day between July 15th and August 15th (depending on the area).

Just a friendly reminder, Autumn is only 51 days away!

(Please keep in mind, this map is based on long-term averages {1981-2010} and certain weather features can cause the warmest day to occur later in the year than what is shown on this map.)