Can’t make up your mind whether you like summer or autumn best?

You’ll get both seasons this weekend -- summer on Friday and Saturday, then autumn on Sunday.

A cold front is forecast to cross the Carolinas over the next 48 hours, bringing the kind of big temperatures drop seen only a few times each year. Meteorologists say thermometer readings will tumble 20 degrees between Saturday and Sunday in the Charlotte area.

And they say the cool weather will hang around a while, lasting through next week.

Residents in parts of the Midwest and Rockies already are experiencing the big change of seasons, although they got a taste of winter, too. Wet snow fell in parts of Minnesota and North Dakota on Thursday, and snow also fell in Denver.

A secondary low pressure system is forecast to develop along the cold front late this weekend and bring more wet snow to areas above 2,000 feet in Pennsylvania, New York, Vermont and New Hampshire.

Snow won’t be a problem in the Carolinas, but temperatures certainly will fall.

It’ll feel like summer through Saturday, with partly to mostly sunny skies and high temperatures climbing into the low to mid 80s in the Piedmont and foothills. National Weather Service forecasters say the cold front will reach the mountains Saturday, accompanied by showers. Then the front is expected to slow to a crawl before picking up steam again Sunday -- pulled to the southeast by the secondary low pressure system.

For the Charlotte area, that means warm weather Friday and Saturday, with highs around 82 degrees each day. But a big change will take place Sunday, with cloudy skies and highs only in the low to middle 60s.

Rain is most likely Sunday in the northern mountains and north of Interstate 40, but a few showers are possible in the Piedmont, especially in the morning and early-afternoon hours.

“It will be dramatically cooler Sunday night, and the cooler temperatures will last several days next week before moderating again by the end of the week,” said Chris Horne, of the Weather Service’s office in Greer, S.C.

If you have recreational plans this weekend -- football, youth soccer, tennis, golf, outdoor festivals, or the Susan G. Komen Race for the Cure on Saturday morning -- here’s what to expect:

FRIDAY NIGHT FOOTBALL: Think summer. Expect nice weather, with temperatures in the upper 70s at kickoff, falling into the upper 60s by the end of the game.

SATURDAY MORNING: It’ll be a great day for the breast cancer run in Charlotte’s uptown, with temperatures in the low to mid 60s at race time. Temperatures will climb quickly during the morning, reaching the upper 70s by midday.

SATURDAY AFTERNOON, EVENING: More nice weather, with plenty of sunshine and highs in the low to mid 80s. Clouds will increase by sunset, but no rain is expected at the beach, or in the Piedmont or foothills.

SUNDAY -- PANTHERS’ GAME: Bring a sweater of light jacket, because temperatures at kickoff (4:05 p.m.) will only be around 60 degrees, and they’ll fall through the 50s during the game. Showers are most likely during tailgating events, from 10 a.m. until about 2 p.m. But there’s only a 50 percent chance of rain.

MOUNTAINS: It won’t be the greatest weekend to see the leaves. Skies will cloud up Saturday, with showers by afternoon. Temperatures will remain warm. Much cooler weather and frequent showers are probable Sunday.

BEACHES: It’ll be a great late-summer weekend, with daytime highs in the low to mid 80s. Rain and cooler weather won’t reach the beaches until later Sunday.