September Statistics and Sultry Start
August has been a crazy cool month, but we get one last hurrah from summer as the month ends. So far there have only been two days when the mercury has reached 90 degrees or better in D.C. and none at Dulles. Reagan National is running about a degree below average while Dulles had the 3rd coolest first half of August on record, and the month is ending about 4 degrees below average as of today. However, the tables are turning and we will be close to 90 starting Saturday and continuing at least into the middle of next week. Check out the latest 6-10 forecast showing well above average (85) temps.
- 6 to 10 day Outlook NOAA
Typically as we enter September the temps wane. Days get shorter and shorter with a loss of more than an hour of daylight by month's end. Less heating of the earth means the average temperature drops from 84 at the start of September to ten degrees cooler when it ends.
- September Climatology
Two other notables for the first meteorological month of fall... hurricanes and allergens. First we'll talk hurricanes as Cristobal continues to churn in the Atlantic today. Click here for the latest advisory from the National Hurricane Center. A high risk of rip currents continues on the Mid-Atlantic coast. Check out Lauryn's blog on that. September is the peak of hurricane season. More major hurricanes are recorded this month than any other. Conditions so far haven't been that favorable for tropical development with wind shear and coolish temperatures. However, there is still time for that to change. There are a few areas of possible development. One in the Gulf of Mexico and the other in the Caribbean.
- Areas of Possible Tropical Development- NHC
Here in the Mid-Atlantic we should always be prepared for a hurricane this time of the year.
September is also a bummer of a month for allergy sufferers. While pollen has been moderate, the peak of ragweed season is here. The first week of September usual has the highest pollen count for ragweed in the D.C. area.