Not much has changed since yesterday's forecast. Warm tomorrow (near 60!). Rain and possibly a clap of thunder tomorrow night. The cold front will pass through on Friday morning. Temperatures will fall during the day so you may want to dress more warmly than you would otherwise think you need to dress. Then again, a Parks Dept. employee recently thought Gothamist was a homeless person, so you may not want to take our sartorial advice.
Once the cold front comes through it is going to drag cold air all the way from the Yukon. Temperatures should be at or below normal for a week or more, or until all the cold air is drained from the far north. It won't be brutally cold, as AccuWeather's news headlines would lead you to believe, but it will be winter.
Weather Graphic from the Weather Network