Transcript for December Heat Wave: Temperatures Suited for Spring
Temperatures that signaled spring, not christmas. Records falling and abc's meteorologist ginger zee now tells us about the latest entry in this strange weather year and how long it will last. Reporter: Dandelions in december. These photos were taken just this week and at this point 2012 is on track to be the warmest on record in the lower 48. It's bizarre and it makes me so incredibly happy. Reporter: In chicago, warm winter coats and hats were replaced by t-shirts and shorts. The windy city soared almost 30 degrees above average monday to 70. Puts me in a great mood but it doesn't feel like christmas. Reporter: The heat marched east where joggers in central park enjoyed a 62-degree day. 15 degrees above the average temperature and in mississippi, high temperatures and melting ice forced this skating rink to close. Across the country, there's been 400 record high temps this december alone. The reason, a strong ridge of high pressure, a kink in the jet stream, allowing springlike temperatures to sneak up where they don't usually hang out. So you're probably wondering and sitting at home thinking, now does this mean this winter will be as mild as last? Well, seasonal forecasting is a ways off so I can't answer that one but what I can tell you all these hot spots up and down the northeast will be 20 degrees colder tomorrow. Cold front coming through and outlook for the next two weeks takes us almost to christmas and brings almost everyone east of the rockies above average. Diane? Love those dandelions this december. Thank you, ginger.
This transcript has been automatically generated and may not be 100% accurate.