You've probably seen the postcards. White sand, bright sun, and someone holding a drink with a tiny umbrella. It looks like a tropical paradise 365 days a year, but if you step off a plane in January expecting a tan, you’re in for a cold, damp wake-up call. Honestly, the weather in Biloxi Mississippi is a bit of a shapeshifter. It’s not just "hot" or "stormy." It’s a complex, salty, humid beast that dictates everything from what you eat to whether or not you can actually gamble comfortably at the casinos.
Biloxi sits right on the edge of the Mississippi Sound. Because of that water, the air is thick. If you aren't used to the Deep South, the humidity here doesn't just make you sweat; it feels like you're wearing a warm, wet blanket. But then October hits, and suddenly, the air crispies up, the sky turns a blue you won't see anywhere else, and you realize why people refuse to leave.
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The Seasons Nobody Tells You About
Most travel brochures talk about four seasons. In Biloxi, we basically have "The Long Steam," "The Golden Window," and "The Wet Chill."
The Long Steam (June through September)
This is the Biloxi most people know. It is hot. Temperatures regularly hover around 90°F ($32$°C), but that’s a lie. The heat index—what it actually feels like when the humidity hits—frequently spikes to 105°F or higher. July is the wettest month, averaging about 8 inches of rain.
But it's not a gray, gloomy rain. It’s a "3:00 PM Boom." Like clockwork, the sky turns black, thunder shakes the windows of the Beau Rivage, and it pours for twenty minutes. Then, the sun comes back out. The water on the pavement evaporates instantly, creating a literal steam bath. You've got to be careful during this time. Dehydration is real, and the UV index hits 10 or 11, which means you’ll burn in about fifteen minutes if you aren't slathered in SPF.
The Golden Window (October and November / March through May)
If you want to experience the best weather in Biloxi Mississippi, this is it. These are the "comfortable days" experts talk about. In October, the humidity drops off a cliff. The highs are in the 70s and 80s ($21$-$29$°C), and the nights are cool enough for a light jacket.
Spring is similar but with more flowers. The azaleas and wisteria go crazy in March. However, spring also brings the "windy month" of April, where gusts off the Gulf can reach 15 mph. It’s great for keeping the bugs away, but it can make the water a bit choppy if you’re planning on taking the ferry out to Ship Island.
Why the Winter Weather in Biloxi Mississippi Trips People Up
January is a weird month here. Most people think "South" means "Warm."
Not always.
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The average low in January is around 46°F ($8$°C), but that doesn't tell the whole story. Because Biloxi is at sea level and surrounded by water, the cold is wet. It’s a bone-chilling dampness that feels much colder than a dry 30 degrees in the mountains. We even see the occasional "wintry mix." In fact, right now in early 2026, the National Weather Service is tracking a cold front that could bring a slight chance of snow showers to the Mississippi Sound.
It won't stick. It almost never does. But the locals will still rush to the store for bread and milk like it's the apocalypse.
- January Highs: 60°F ($16$°C)
- January Lows: 44°F ($7$°C)
- Sea Temperature: Brisk 59°F ($15$°C)
The Elephant in the Room: Hurricane Season
We have to talk about it. Hurricane season runs from June 1st to November 30th. For Biloxi, the peak risk is usually between August and September.
Living here means having a "Go Bag" and knowing your evacuation zone. But for a visitor? It mostly means watching the Tropics. Most storms are just rain-makers, but the big ones like Katrina or Camille changed the landscape of this city forever. If you’re booking a trip in August, get the travel insurance. It’s worth the $50 for the peace of mind alone.
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What to Actually Pack (The Insider List)
Don't just pack shorts. You'll regret it.
- The "Casino Sweater": Even if it’s 100 degrees outside, the casinos keep their AC at "Arctic Tundra" levels. You will freeze if you're in a tank top.
- A Real Rain Jacket: Not a flimsy poncho. You need something that breathes, or you'll just sweat inside the jacket.
- Polarized Sunglasses: The glare off the Gulf is blinding.
- Anti-Frizz Hair Products: Honestly, just give up. The humidity wins every time.
Actionable Tips for Your Trip
If you are planning around the weather in Biloxi Mississippi, don't just look at the high temperature. Check the dew point. If the dew point is over 70, you’re going to be miserable outdoors for long periods. If it’s under 60, it’s a perfect day for a walking tour of the Historic District or a trip to the Biloxi Lighthouse.
Plan your outdoor activities for before 11:00 AM. Between noon and 4:00 PM in the summer, the sun is brutal. That is the time to hit the Maritime and Seafood Industry Museum or sit at a blackjack table.
Watch the tides if you're fishing. The weather affects the fishing, too. A strong north wind can push water out of the bay, making it shallower than you’d expect. Always check the marine forecast if you're taking a boat out; the Mississippi Sound is shallow, and it gets "choppy" fast when the wind picks up.
The best move you can make right now? Check the long-range forecast for the "humidity drop." If you see a week in late October where the lows hit the 50s, drop everything and book your room. That is when Biloxi truly shines.
Next Steps for You:
Check the current National Weather Service radar for the Gulf Coast to see if any afternoon thunderstorms are brewing before you head to the beach. If the forecast shows a "moderate risk" of rip currents, stick to the pool—the Mississippi Sound can have deceptive undercurrents near the barrier islands.