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Michelle Mackey goes through some awesome facts about spring.
WEATHER | New York City

When can New Yorkers expect consistent warmth?

Wednesday, April 19, 2017, 5:51 - Wool pea coat one morning, T-shirt the next. While New Yorkers have savoured a taste of spring a few times this month, temperature swings will continue to dominate the weather story into May.

Commuters donned light coats on the way to work Wednesday morning, with temperatures hovering around the mid-40s across Central Park. That’s quite the contrast to last week when the region basked under a ridge of high pressure that drove the mercury up to 80oF on Tuesday, April 11.

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So when can New Yorkers expect a consistent weather pattern – or more specifically – consistent warm temperatures? First, we have to understand what causes the roller-coaster temperature swings.

“The springtime months (much like the fall) are a period of big changes, and a lot of wild temperature swings,” says Weather Network meteorologist Michael Carter. “These are months of transition, where we are moving from a cold winter pattern to a warm summer pattern across the northern hemisphere. This change doesn’t happen smoothly, and is often punctuated by abrupt swings between warm and cold.”

The good news, however, is that the overall trend in April is always up. In New York City, the average high temperature climbs from 56°F on April 1 to 66°F by April 30, according to The National Weather Service. 

From a meteorologist’s perspective, 70 degrees is generally the demarcation line for what is considered “warm”. While temperatures climb again later this weekend, Carter says it could take a few more weeks until we can finally pack our lingering winter wardrobe away. 

“Temperatures become more consistent later in the spring, and especially once we turn the corner into summer,” explains Carter. “This is because the warm summer pattern becomes more established as cold air retreats to the Arctic, leading to fewer clashes between contrasting air masses.”

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At Central Park, the average high temperature climbs to 70°F on May 11, reaching as high at 84°F during parts of July and August, according to Carter. Average highs fall back below 70°F on October 1. So, generally speaking, the warm season in NYC could be considered early May – September.

In the meantime, Carter says expect anything but the kitchen sink for the rest of the month.

“Transitional months always bring big forecast challenges, because along with big swings in temperature we often see active weather,” says Carter. “That can include anything from thunderstorms to late season snowfall, and everything in between.”

Click play to watch below: Temperature Pattern

For full forecast details, including long and short range weather forecasts, on New York City, click here.

Watch below: 5 things you don't spring clean, but should

Thumbnail image: Central Park, courtesy Wikipedia Creative Commons

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