Hmmm. Not sure how that happened, unless you didn't specify "all" on the forum drop-down search menu.

I tried it with "winter," "frozen," "frosty, "snow," "December," "January," "February," "chilly," and "cold" and came up with these titles (again, there may be a few that have already been mentioned):

Cold Wind Blows (Alasdair Clayre)
The cold wind blew over the sea
Out in the Cold Cold Snow (Gracie Fields)
Brr it's a cold day (Brr it's a chilly day)
Drive the Cold Winter Away
Rain & Snow / Cold Rain and Snow
Cold is the snow that lay in Glencoe
(lyric) 'in the cold gray dawn of December'
Cold February (Robin Williamson)
Snow (from Loreena McKennitt)
Cold Haily Rainy Night (Planxty)
The Sheep Are 'Neath the Snow
Chilly Winds
Drifting Vistling Snow (Ernest Iverson)
Snow Song (Peter Bond)
Suzy Snowflake
Snowflake Song
When the Snowflakes Fall Again
The Walker of the Snow (Shanly, Tyrrell)
the snow is on the ground
The Snows (John Renbourn)
Wait Until The Snow (McTell)
Awaiting the Snow (Lui Collins)
Water under Snow Is WearyThe cat is in the snow
Out of the Snow (Russell Smith)        
Eyelids into Snow (Sonny Condell)
I Still Write Your Name In the Snow
Like the Snow (Sydney Carter)
Roses In The Snow (Emmylou Harris)
Flower in the Snow (Allan Taylor)
Snows Of Glencoe
Teardrops Falling in the Snow
Snowbird
Deepening Snow
The Snow Lay On The Ground
Snow Deer (closed)Jericho (Ho Ro the Wind and Snow) (G Bok)        
The Snow Legend (A Temple, J W Clokey)        
Where Did My Snowman Go?        
When the Snow Falls on My Foggy Mt. Home        
Snow Snow (Pete Seeger)
If It Doesn't Snow on Christmas (Autry)
Dark December (Graeme Miles)
Roses In December (George Jessel)
Faded Roses Of December
The Month of January (Noel McLoughlin)
Eighth of January        
January Song (Lindisfarne)
January Man (Dave Goulder)
The January June (parody by Les Barker)
Sad February (Graeme Miles)