The prolonged dry spell could impact outdoor activities and agriculture in the Washington, D.C., Maryland, and Virginia areas. Frosty mornings on Saturday and Sunday may pose a risk to sensitive plants, particularly in rural and suburban areas outside urban heat zones. The lack of rain could also lead to dry soil conditions, which may affect local vegetation and water resources. However, the dry weather is expected to provide favorable conditions for outdoor events, such as the Marine Corps Marathon on Sunday.