A: Only if you live in the Southern Hemisphere. For the Northern Hemisphere, summer occurs in July, which is actually the farthest point (aphelion).
"So," Maya mused, warming her hands on the cup. "We are closest to the sun in January, usually around the 3rd or 4th. But because we are tilted away, we freeze."
"Exactly," Elias said. "And conversely, in July, when we are sweating and complaining about the heat, Earth is actually at its farthest point from the Sun—aphelion."
"Wait," Maya laughed. "So in July, we are the farthest away?"
"Roughly 94.5 million miles away, compared to 91.4 million miles right now," Elias confirmed. "We are actually closest to the fire when we are the coldest, and farthest from the fire when we are the hottest."
"That sounds like a metaphor for my love life," Maya joked.
"It’s actually Jupiter's fault," Elias added.
Maya blinked. "Jupiter?"
"The reason perihelion happens in January isn't random," Elias explained. "It shifts over thousands of years. Right now, and for the last few centuries, the timing of Earth’s closest approach is dictated by the gravitational pull of Jupiter. Our giant neighbor tugs on our orbit, influencing exactly when we swing close to the Sun." during which month is the earth closest to the sun link
Maya looked out the window at the snowy landscape, the sun rising weakly over the white horizon.
"It's kind of poetic," she said softly. "We are never more intimate with our star than we are in the dead of winter. We are as close as we can possibly be, yet we turn our face away."
Elias nodded. "And that is the lesson of perihelion. It’s not about how close you are to the source of heat; it’s about how you are angled to receive it."
It is important to note that the Southern Hemisphere experiences the opposite. When the Earth is closest to the sun in January, countries like Australia, Argentina, and South Africa are tilted toward the sun. Therefore, they experience hot, sunny summers in January.
So, for our friends in Sydney or Buenos Aires, the proximity to the sun makes perfect sense: the closest month (January) is indeed their hottest month.
This is the million-dollar question. If we are 3 million miles closer to the sun in January, why is it freezing in New York, London, and Paris?
The answer lies in a single, critical factor: The Tilt of the Earth's Axis (Seasons).
Distance from the sun is not what causes our seasons. The seasons are caused by the 23.5-degree tilt of the Earth on its axis. A: Only if you live in the Southern Hemisphere
Think of it like a flashlight. If you shine it straight down onto a piece of paper, the light is hot and bright. If you tilt the flashlight, the same amount of light spreads out over a bigger area and becomes dim and cool. The tilt trumps the distance.
Each year Earth follows an elliptical orbit around the Sun. Because that orbit isn’t a perfect circle, there’s a point when Earth is closest to the Sun (perihelion) and a point when it’s farthest (aphelion). Perihelion typically occurs in early January—usually around January 2–5—while aphelion occurs in early July. That means Earth is nearest the Sun in January, not during the northern-hemisphere summer.
If you’d like, I can:
It was a brisk, bone-chilling morning in early January. In a small observatory just outside of Chicago, an amateur astronomer named Elias was rubbing his gloved hands together, shivering as he adjusted the lens of his telescope. The wind howled outside, whipping snow against the dome of the observatory. The thermometer outside the window read 5°F (-15°C).
Elias’s niece, Maya, burst through the door, bringing a gust of icy wind with her. She was home from college for the winter break.
"Uncle Elias!" she exclaimed, stamping snow off her boots. "Why on earth are you up here? It’s freezing! The car wouldn't even start this morning."
Elias smiled, his breath puffing out in white clouds. "I’m observing our star, Maya. And ironically, that is exactly why it is so cold."
Maya rolled her eyes. "Don't give me a riddle. The sun is the farthest thing from my mind right now. I’m thinking about hot cocoa." It is important to note that the Southern
"Believe it or not," Elias said, stepping back from the eyepiece and gesturing for her to look, "at this very moment, the Earth is closer to the Sun than it will be at any other point this year."
Maya stopped stamping her feet. She looked at her uncle, then at the telescope, then back at him. "You’re kidding. It’s January. We’re freezing. You’re telling me we’re closer to the sun than we are in July?"
"Look for yourself," Elias said.
Maya peered through the lens. The Sun was a steady, calm disc. "It looks... normal," she said.
"Look at the size," Elias prompted. "Compare it to a photo taken in July. Right now, the Sun is about 3% larger in our sky than it is in the middle of summer."
Maya pulled back, intrigued. "Okay, you have my attention. Explain the physics, because my toes are telling me we should be roasting."
Gravitational interactions with other planets (especially Jupiter and Saturn) and long-term orbital cycles cause the timing of perihelion to precess slowly over thousands of years. So the exact calendar date of perihelion can vary by a day or two each year and shifts over millennia.