Winter in Central Indiana isn't just about the cold. Honestly, if you've lived in Westfield for even a single season, you know the sky has a personality of its own. Right now, on Thursday night, January 15, 2026, we’re looking at a temperature of 19°F. But that’s just the raw number. With a 9 mph wind coming in from the southwest, the feels-like temperature is actually a biting 9°F. It’s the kind of night where you don't just wear a coat; you wear the good coat.
Earlier today, we saw some snow. It wasn't a blizzard, but with a high of 25°F and a 35% chance of precipitation during the daylight hours, it was enough to keep the salt trucks busy. Now that the sun has long since set—at 5:43 PM to be exact—the clouds are sticking around. The current humidity is sitting at 63%, and while the snow has mostly tapered off for the night, the overcast sky isn't going anywhere.
The Reality of a Westfield January
People from out of state think Indiana weather is predictable. It's not. Weather forecast Westfield Indiana data shows that January is officially our coldest month, but the nuances are what catch you off guard. We're currently in a stretch where the overnight lows are hovering around 16°F. That’s pretty standard for mid-January in Hamilton County.
But here’s the thing. The wind is the real factor here. Today we saw west winds hitting 14 mph. When you combine that with temperatures that can't even break the freezing mark, you get that specific Indiana "chill" that seems to cut through denim.
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Historically, January in Westfield is a gray affair. We get about 59% cloud cover on average throughout the month. If you’re looking for a clear day, you might have to wait until tomorrow, January 16, which is statistically one of the clearest days of the month. Still, "clear" in an Indiana winter is a relative term.
Why the Wind Direction Matters
You've probably noticed the wind shifted from the west today to the southwest tonight. In Westfield, a southwest wind often feels slightly less "sharp" than a straight northern blast, but at 9 mph and 19°F, it’s still cold enough to freeze a windshield in minutes.
The humidity is another sneaky one. At 63% tonight, it’s actually lower than our seasonal average of 94% relative humidity. When the air is that damp and cold, the heat leaves your body much faster. It’s science, but it feels like a personal insult from the atmosphere.
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What’s Coming Next for Hamilton County?
If you're planning your commute for Friday morning, keep an eye on the ground. Even though the chance of snow drops to 15% overnight, the existing 19°F air means anything that melted earlier today is now a sheet of ice.
- Tonight's Low: 16°F
- Visibility: Mostly cloudy but stable
- Wind Chill: Expect single digits through sunrise
Looking ahead at the weather forecast Westfield Indiana, the 14-day trend suggests we aren't done with the snow. We are currently in what experts call a "humid continental" climate. Basically, that means we get hit by both cold dry air from Canada and moist air from the Gulf. When they meet over Grand Park, you get the messy, slushy mix we’re seeing this week.
Managing the Westfield Winter
Kinda makes you want to stay inside, right? If you have to be out, the best move is layering. We aren't just talking about a sweater. You need a base layer that wicks moisture because, believe it or not, you can sweat in 19°F weather if you’re shoveling, and that moisture will turn into a freezer pack the moment you stop moving.
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- Check your tire pressure. Cold air makes the pressure drop, and we’re well below the threshold where that "low tire" light starts popping up.
- Keep the wipers up. With the humidity and the overnight low of 16°F, any residual moisture is going to glue those blades to the glass.
- Watch the southwest wind. It’s gusting just enough to make high-profile vehicles a bit jumpy on US-31.
The Bottom Line
Westfield is beautiful in the winter, especially when the snow sticks to the trees along the Monon Trail, but it's a "respect the elements" kind of beauty. We’re currently facing a cold, cloudy night with temperatures that won't see the 30s again for a little while.
Take a second to check your outdoor faucets and make sure your pets are inside. At 9°F wind chill, frostbite can start faster than you’d think. Stay warm, keep the de-icer handy, and remember that we’re gaining about a minute and a half of daylight every day now. Spring is a long way off, but the sun is technically staying up longer.
Actionable Next Steps:
Check your vehicle's antifreeze levels and emergency kit tonight. Ensure you have a heavy ice scraper and a blanket in the trunk, as the overnight low of 16°F will likely lead to thick frost or "black ice" patches on side roads like 161st Street and Carey Road by tomorrow morning.