Earth’s Perihelion 2017

The Earth will reach its Perihelion today at 14:18 UTC, which is 9:18 AM Eastern Standard Time. This is the point in the planet’s orbit where it comes closest to the Sun.

This annual event is due to the elliptical shape of the Earth’s orbit and the off-centered position of the Sun inside that path. The exact date of the Perihelion differs from year to year, but it’s usually in early January – winter in the northern hemisphere. The Earth will be furthest from the Sun in July.

While the planet’s distance from the Sun is not responsible for the seasons, it does influence their length. As a function of gravity, the closer the planet is to the Sun, the faster it moves. Today, the Earth is 147.1 million kilometers (91.4 million miles) away from the Sun. That is approximately 5 million kilometers (3 million miles) closer than it will be in early July. This position allows the planet to speed up by about one-kilometer/second. As a result, winter in the northern hemisphere is about five days shorter than summer.

The word, perihelion, is Greek for “near sun”.

Earth is closest to the Sun during the northern hemisphere’s winter. Credit:

NYC Monthly Summary: December 2016

December felt like a weather roller coaster in New York City this year. We had highs that ranged from a cold 27°F to a relatively balmy 60°F. The warmth won out in the end, though. The city’s mean temperature for the month was 38.4°F, which is 0.9°F above our long-term norm. That makes December 2016 the Big Apple’s 18th consecutive month with an above average temperature – its longest streak on record.

In terms of precipitation, December was mostly dry. In all, we received 2.89 inches of rain, which is 1.11 inches below normal. Snowfall was also relatively scarce with Central Park reporting 3.2 inches for the month. The city usually receives 4.8 inches of snow in December. As a result of the this paltry precipitation, NYC remains in a moderate drought according the latest report (12/29) from the US Drought Monitor.

Credit: The Weather Gamut