So, you’re looking at the weather forecast for Greenville Mississippi and trying to figure out if you actually need that heavy coat or if a light hoodie will do. Honestly, if you’ve spent more than five minutes in the Delta, you know the sky here has a mind of its own. One minute it’s gorgeous and the next you’re wondering if you should’ve parked under a carport.
Right now, it’s Wednesday, January 14, 2026. If you step outside today, you’re looking at a high of about 58°F. That sounds decent, right? But don't let the "partly sunny" label fool you. There's a 40% chance of light rain rolling through this afternoon. With the wind kicking up from the northwest at 13 mph, that 58°F is going to feel a lot more like 44°F. Basically, it’s that damp, biting cold that Mississippi does so well.
The Chill is Moving In
Tonight is when things get interesting. The mercury is set to drop down to a crisp 29°F. We’re looking at clear skies once the rain moves out, but that means all the heat is going to escape straight into the atmosphere. You’ve probably heard the term "radiational cooling"—that's exactly what's happening.
By Thursday morning, expect frost. It’s not just a "maybe" thing; the National Weather Service is pretty firm on this. If you have plants that aren't fans of freezing temps, you better bring them in or cover them up. Thursday's high is only going to hit about 44°F. It’s going to be one of those days where the sun is out, but it doesn't actually provide any warmth.
Looking Ahead: The Polar Vortex Risk
There’s been a lot of chatter among meteorologists about the Polar Vortex weakening. Now, before you panic and buy all the milk and bread at the Kroger on Highway 1, it doesn't mean a blizzard is hitting the Delta tomorrow. It does, however, mean that the second half of January 2026 is looking much more volatile.
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While Friday might see a brief "warm-up" to 56°F, another surge of Arctic air is lurking for next week. Historical data for Greenville shows that January 16 is typically our coldest day of the year, with average lows around 36°F. We are currently trending a bit warmer than the historical average, but the models for the week of January 18 through the 24th are showing a firm turn toward the freezing side.
Why Greenville Weather is Just... Different
You can't talk about the weather forecast for Greenville Mississippi without mentioning the humidity. Even in the dead of winter, our humidity averages around 72% to 84%. In the summer, that makes you feel like you're breathing through a wet towel. In the winter? It makes the cold feel "heavy." It gets into your bones.
- The Mississippi River Factor: Being right on the water influences our local microclimate. You might see fog rolling off the river that doesn't show up on the general regional maps.
- Wind Speeds: We average about 12-14 mph winds in January. In a flat landscape like the Delta, there’s nothing to block those gusts.
- Rain Patterns: We usually get about 4.78 inches of rain in January. This year, we’re actually a bit below that, but don't expect a dry month.
What Most People Get Wrong About Delta Winters
People think Mississippi is always warm. That's a myth. We’ve had days where it hits 82°F in January (like back in 1947), but we’ve also seen it drop to 0°F (1918).
Honestly, the biggest mistake you can make is checking the "high" for the day and assuming that’s what it will feel like. In Greenville, the "feels like" temperature—or the wind chill—is the only number that actually matters. If the forecast says 50°F but the wind is coming off the river, you’re going to want that windbreaker.
Your Delta Weather Game Plan
If you’re planning your week, here is the reality of what’s coming.
- Wednesday (Today): Light rain showers. High 58°F, but dropping fast. Get your errands done before sunset.
- Thursday: Bracingly cold. High 44°F. This is the day for heavy layers.
- Friday: A little better. High 56°F. It’s a "window" of decent weather before the next front.
- The Weekend: Looking at highs in the upper 40s to low 50s. Sunday might bring some sprinkles late in the day.
Actionable Advice for Greenville Residents
- Check your tires: Drastic temp drops from 60°F to 29°F will trigger your "low pressure" light. Don't ignore it.
- Drip the faucets: Since we’re hitting 29°F tonight and 25°F by Friday night, it’s worth being cautious with any exposed pipes, especially in older Delta homes.
- Layering is key: Start with a moisture-wicking base. The humidity is real, and if you sweat under a heavy coat and then stop moving, you’ll get a chill you can't shake.
- Monitor the Vortex: Keep an eye on local news for updates on that Arctic surge predicted for next Wednesday, January 21. There’s a non-zero chance of some light snow or "wintry mix" as the cold air meets the Gulf moisture.
Stay warm out there. The Delta is beautiful in the winter, but it doesn't suffer fools who forget their jackets.