What to know about the changing weather this week (and its effect on allergies)

Temperatures in the 80s are expected through Thursday, with plenty of sunshine before storms develop later Thursday.

Conditions will be optimal for UV Index and tree pollen counts to rise.

Tree pollen is already at a high level, according to the Regional Air Pollution Control Agency tests. The pollen.com five-day allergy forecast for Dayton is in the high range through midweek - peaking Wednesday - before falling to a medium threat on Friday.

Dayton typically ranks high among the nation’s “Spring Allergy Capitals” by the Asthma and Allergy Foundation of America. For last fall, Dayton was the most challenging city in the Midwest to live with allergies, according to the organization, which has yet to release its spring 2017 index.

The spring allergy season in Dayton is typically more severe than in other cities because the area has a high concentration of plants and trees that bloom simultaneously. The pollen causes allergies and symptoms such as headaches, irritated eyes, sneezing, coughing and congestion.

Forecast through Thursday: 

TODAY: UV index and pollen count will likely have the biggest impact. Despite warming up, we will remain dry and it will feel comfortable with dew points getting into the low-mid 50s.

TUESDAY: Sunshine and scattered clouds through the day. Highs climb to the low 80s— that's almost 15 degrees warmer than normal. Dew points will get into the low 60s as moisture increases in the Miami Valley. It will start to feel a little muggy.

WEDNESDAY: Even warmer for the afternoon. Highs reach the middle 80s. Plenty of sunshine early with clouds increasing through the day.

THURSDAY: Clouds will linger through the day. Breezy and very mild in the low 80s. Scattered showers and storms develop towards the evening hours.