Pack the rain gear and the heavy coat. More than 80 million people will see freezing temperatures this weekend as a cold blast, a nor'easter and an atmospheric river make for a wet, chilly football weekend from coast to coast.

(WEATHER LABS: Football tailgate forecasts)

Saturday

Déjà vu in Boise: College GameDay returns for the first time since 2010, with the Broncos hosting the same opponent, Oregon State, as the last time the show visited.

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It will be a mostly dry setup with highs in the mid-50s but the game will turn chilly once the sun goes down, so bring a warm layer for the evening. Rain and mountain snow stay mostly in central Idaho to the north and east.

Some games could get a taste of a wintry mix or even snow in the mountain West and interior Northeast.

Snow or wintry mix possible

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• Minnesota at Penn State: Snow, rain or a wintry mix from the nor'easter.
• Baylor at BYU: Rain and mountain snow.

Rain likely

• Texas A&M at Tennessee: Scattered showers, mainly in the afternoon.
• Ole Miss at Oklahoma: Rain is expected across Oklahoma.
• Michigan at Oregon: Atmospheric river showers move in from the West Coast.
• Texas Tech at Oklahoma State: Rain covers the Texas Panhandle and Oklahoma.

Rain possible

• Wake Forest at SMU: Scattered moisture is possible, with the heavier rain holding off until Saturday night.
• Utah at Arizona: A few showers could reach tailgates from nearby southern Arizona and New Mexico.

Most tailgaters will be bundling up Saturday as a cold blast spreads from the Midwest into the South and Northeast.

A few games stay comfortably warmer, though, with Miami, Tucson and Texas in the 60s and 70s.

Warm (60s and 70s)

• Duke at Miami
• Utah at Arizona
• Tennessee at Texas A&M
• Wake Forest at SMU
• Texas at LSU

Mild (50s)

• Michigan at Oregon
• Oregon State at Boise State
• Ole Miss at Oklahoma
• South Carolina at Arkansas
• Missouri at Georgia
• Alabama at Vanderbilt
• Florida at Kentucky

Cold (40s)

• Northwestern at Ohio State
• Boston College at Notre Dame
• Purdue at Iowa
• Texas Tech at Oklahoma State

Sunday

Rain soaks Dallas, with showers possible in New Orleans and Las Vegas and a rain-snow mix near Cleveland and New York. The retractable roof helps in Dallas, but tailgates stay exposed.

(MORE: Why you can't see rain during a football game broadcast)

Games with rain or snow chances

• 49ers at Cowboys (Dallas): The wettest tailgate of the day, with rain up to 1-2 inches.
• Panthers at Saints (New Orleans): A cold front could bring scattered showers.
• Seahawks at Raiders (Las Vegas): Lingering atmospheric river showers are possible.
• Texans at Browns (Cleveland): Light showers along Lake Erie, with snow or a wintry mix nearby.
• Bills at Jets (New York): A rain-snow mix is possible, with the heavier snow staying north of the city.

Under a roof

• Dallas (retractable): Fans inside should stay dry, though the team decides whether to close the roof closer to kickoff.
• New Orleans (fully enclosed): The game isn't affected.
• Las Vegas (fully enclosed): The game isn't affected.

Open-air

• Cleveland: Fans in the stands will feel the rain, snow or mix and the cold.
• New York (Jets): Fans in the stands will feel any rain-snow mix and the chill.
• Green Bay: There's no wet weather in the notes but it's one of the coldest spots, so fans in the stands will feel all of it.

(MORE: The top 10 weather games in NFL history)

Most NFL fans will feel the chill, especially in Green Bay, Cleveland and the New York area. Some games hold onto warmer weather, with the Southwest and the Gulf Coast in the 60s and 70s.

Plan for it to feel colder after sunset.

Warm (60s and 70s)

• Rams at Cardinals
• Seahawks at Raiders
• Panthers at Saints

Mild (50s)

• Chiefs at Falcons
• Jaguars at Titans
• 49ers at Cowboys
• Bills at Jets
• Dolphins at Colts
• Steelers at Bengals

Cold (40s)

• Texans at Browns
• Vikings at Packers

(MORE: The ultimate tailgate playbook for every football forecast)

Tailgate safety: Know your forecast, stay aware

Whether you're facing storms or cold weather this weekend, staying aware of changing conditions — and having a plan to adjust — is the best way to stay safe at your tailgate:

• Check the forecast for your specific tailgate location and arrival time, not just the daily high, since conditions can shift significantly between morning setup and kickoff.
• Heat safety: Stay hydrated, seek shade whenever possible, take breaks in air conditioning if available, and know the signs of heat exhaustion — dizziness, heavy sweating and nausea.
• Cold safety: Add a wind-resistant outer layer to your gameday fit.
• Storm safety: Monitor local radar in the hours before and during your tailgate, since storm timing can shift quickly.
• Lightning safety: If thunder roars, go indoors — a hard-topped vehicle counts if no building is nearby. Wait at least 30 minutes after the last thunderclap before heading back outside.
• Secure your setup: Tents, canopies and loose gear should be tied down or ready to pack up quickly if storms move in.

Faiza Mohammed is a meteorologist intern at weather.com. She studied geography and worked with the Weather Dawgs team at the University of Georgia. She also received her master's in Earth and Atmospheric Sciences from the Georgia Institute of Technology.