General custom events: http://pastebin.com/aS0DezVt

The temperature isn't the only chilling thing here.

Current code: http://brantsteele.net/hungergames/r.php?c=RK7tug6z

Non-lethal (Bloodbath):
(Player1) grabs a viking helmet, believing that (he/she1) will look badass.
(Player1) grabs an Alpenhorn.
(Player1) grabs several bottles of vodka.
(Player1) grabs a lantern.
(Player1) grabs a snow shovel.
(Player1) calmly walks away from the Cornucopia like it's no big deal.
(Player1) runs back and forth from the Cornucopia unsure of what to do.
(Player1) grabs a flamethrower.
(Player1) gets a copy of Mjölnir.
(Player1) searches on top of the Cornucopia.

9 events

Non-lethal (day and night):
An icicle falls on (Player1), but it breaks apart upon impact.
(Player1) tells a yeti (he/she1) wishes to go back home. He responds "No can do!"
(Player1)'s urge to kill rises.
(Player1) encounters an angry caribou, but (he/she1) manages to escape from it.
(Player1) wards off a pack of wolves.
(Player1) is attacked by a bear, but is saved by (Player2).
(Player1) gets a Christmas special episode.
(Player1) gets a Hanukkah special episode.
(Player1) sees (Player2) shivering and decides to give (him/her2) (his/her1) jacket.
(Player1) discovers the true meaning of Christmas!
(Player1) plans to deliver the boner of the year
(Player1) slays a winter wolf with a hatchet and crafts (himself/herself1) a warm fur hat.
(Player1) decides to go for a jog to keep (his/her1) body warm.
(Player1) is attacked by a group of evil snowmen, but manages to defeat them all and survive.
(Player1) is attacked by a group of evil snowmen, but manages to escape from them.
(Player1) receives dry clothing from an unknown sponsor.
(Player1) almost dies from hypothermia, staying alive by sheer willpower.
(Player1) falls into a frozen lake, but (he/she1) manages to swim out of it.
(Player1)'s hand becomes frostbitten, forcing (Player2) to amputate it.
(Player1) falls onto the ice of the frozen lake, which didn't break.
(Player1) spills hot chocolate onto (Player2).

21 events

Non-lethal (day only):
(Player1), (Player2), and (Player3) go on a hunt for caribou.
(Player1) and (Player2) build a snowman modeled after a former tribute.
(Player1) and (Player2) construct an igloo.
(Player1) writes (his/her1) name on the snow with (his/her1) urine.
(Player1) licks a lamppost and gets (his/her1) tongue stuck.
(Player1) yodels.
(Player1) and (Player2) discuss who should be Dirty Dan and who should be Pinhead Larry.
(Player1) constructs an igloo.
(Player1) constructs makeshift claws.
(Player1) starts a snow plow company with (Player2).
(Player1), (Player2), (Player3), and (Player4) engage in a snowball fight.
(Player1) discovers an abandoned cottage.
(Player1) slides on the soap.
(Player1) tries to melt the snow with a hairdryer.
(Player1) and (Player2) do nothing all day but drink vodka.
(Player1), (Player2), (Player3) and (Player4) go to ice skate on a frozen lake.
(Player1), (Player2), (Player3), (Player4) and (Player5) engage in a snowball fight.
(Player1), (Player2), and (Player3) engage in a snowball fight.
(Player1) and (Player2) engage in a snowball fight.
(Player1), (Player2), and (Player3) gang up on (Player4) and assault (him/her4) with snowballs.
(Player1) and (Player2) go for a sled ride and get hurt when they crash into a tree.
(Player1) and (Player2) go for a sled ride and get hurt when they crash into (Player3).
(Player1) and (Player2) go for a sled ride down a gentle slope.
(Player1) got run over by a reindeer, but is merely injured.
(Player1), (Player2), and (Player3) sing their own version of the 12 Days of Christmas.
(Player1), (Player2), (Player3), and (Player4) play hockey on a frozen lake.
(Player1) drinks a slushie because (he/she1) can.
(Player1) drinks a slushie and suffers a mild brainfreeze.
(Player1) climbs a tree and knocks snow off onto (Player2).
(Player1) climbs a tree to get a better view of the Arena.
(Player1) and (Player2) find a hotspring and stay in it all day.
(Player1) rolls a snowball down a hill. It runs over (Player2) and (Player3), but they survive.

32 events

Non-lethal (night only):
(Player1) cuts open a Tauntaun to keep (Player2) safe.
(Player1) and (Player2) go into a cave and have kinky sex.
(Player1) comes down the chimney dressed as Santa.
(Player1) is haunted by the three ghosts of Christmas.
(Player1) and (Player2) share a warm blanket for the night.
(Player1) stays close to a fireplace.

6 events

Non-lethal (Feast only):

When no one was looking, (Player1) took forty cakes.
(Player1) and (Player2) go to the Feast and share a nice cup of cocoa.
(Player1) steals the Christmas turkey for (himself/herself1).
(Player1) accidentally wrecks the Gingerbread house.
A yeti arrives and offers (Player1) and (Player2) snow cones.
(Player1) was the turkey all along!

6 events

Lethal (day and night; some may be in the Bloodbath and the Feast):
An icicle falls on (Player1), killing (him/her1).
(Player1) encounters a yeti and gets killed.
(Player1) stabs (Player2) with an icicle.
(Player1) shoves (Player2) into a crevasse.
(Player1) defeats (Player2) and lets the wolves eat (him/her2).
(Player1) encounters an angry caribou, which proceeds to trample (Player1) to death.
Thinking (his/her1) team is weak, (Player1) grabs a flamethrower and burns (Player2) and (Player3).
(Player1) lights the menorah, but causes a fire to spread, killing (Player2).
(Player1) sings "Let it Go." (Player2) beats (him/her1) to death.
(Player1) discovers (Player2)'s body in a block of ice.
(Player1) is attacked by a group of evil snowmen. They manage to kill (Player1).
(Player1) explodes when (he/she1) was about to torch (Player2) and (Player3) with a flamethrower.

12 events

Lethal (day only):
(Player1) falls into a frozen lake while (he/she1) was ice skating on it.
(Player1) throws a snowball with a rock inside at (Player2)'s head, killing (him/her2).
(Player1) and (Player2) go for a sled ride and fall into a crevasse.
(Player1) finds (Player2) camouflaged in a mud puddle and stomps (him/her2) to death.
(Player1) drinks an XL-slushie and dies due to (his/her1) brain freezing over.
(Player1) is suffering from snowblindness, and stumbles off of a cliff.
(Player1) drowns (Player2) in a hotspring.
(Player1) rolls a snowball down a hill. It gets huge and crushes (Player2) and (Player3).

8 events

Lethal (night only):
(Player1) is dragged away in (his/her1) sleep by starving wolves.
(Player1) enters a cave to rest but gets eaten by a bear.
(Player1) tries to come through the chimney dressed as Santa, but ends up breaking (his/her1) neck.
(Player1) develops cabin fever and kills (Player2), (Player3) and (Player4) with an ax.
(Player1) traps (Player2) out of (his/her2) shelter, leaving (him/her2) to freeze to death.

5 events

Lethal (Feast only):

(Player1) tries to eat as much food as (he/she1) can, but ends up choking to death.

1 event

Arena events:
Vanilla:
Wolf mutts
Border contracting
Squirrels

New:
Frozen lake:
The remaining tributes gather around a frozen lake.

(Player1) survives without incident.
(Player1) falls into the frozen lake and drowns.
(Player1) stabs (Player2) with an icicle found at the lake.
(Player1) attempts to rescue (Player2) from drowning, only to fall in as well.
(Player1) and (Player2) are compelled to drown themselves.
(Player1) knocks (Player2) into the frozen lake and leaves (him/her2) to die.

Blizzard:
A blizzard rampages through the arena.

(Player1) survives.
(Player1) cannot find shelter and freezes to death.
The shelter of (Player1) and (Player2) collapses on them, killing them.
(Player1) refuses (Player2) shelter, leaving (him/her2) to die.
(Player1) cannot see well and falls into a crevasse as a result.
(Player1) severely injures (Player2) and leaves (him/her2) to die.

5 events, 2 new

Statistics (outdated):
9 new Bloodbath events
59 new day events
39 new night events
7 new Feast-only events
2 new arena events
87 new events total

Note: There is lots of overlap between the events shared by the Bloodbath, Feast, day, and night.

Suggestions to be added:
An avalanche arena event. Other ideas could be added, but they are not known yet.
Events involving Santa Claus (from random encounters being harmless or deadly to an entire Arena event; it would have to be figured out how Santa will be consistent in behavior)
More references to clothing.
Events involving trees, specifically coniferous trees.
More events involving the claws and the flamethrowers.
Snownado arena event.
Canadian invasion arena event.

Considered:
(Player1) got gang-raped by horny snowmen.
(Player1) gets run over by a reindeer. (Player2) vows to sue pants off of Santa. (There is already an event with just the first sentence happening.)
(Player1) and (Player2) each get run over by a reindeer. (Player3) starts singing the song but then gets gored by a third reindeer. (Might be too long and would have to be rephrased if added.)
(Player1) licks a lamppost and gets (his/her1) tongue stuck. (Player2) points and laughs at him/her. (The first sentence is already an event.)
(Player1) is captured by a yeti, but cuts its arm off with a lightsaber and escapes. (Another Star Wars reference.)
Various events involving skiing, snowboarding, bobsleds and whatnot.
(Player1), (Player2), (Player3), (Player4) and (Player5) do a Christmas dance, Peanuts style.
(Player1) plans to ruin the winter holidays of the others, as (he/she1) grins like the Grinch.
(Player1) steals the Christmas presents of the other tributes as they go to sleep.
(Player1), (Player2), (Player3), (Player4) and (Player5) spend the morning singing Christmas carols.
(Player1) sings The Grinch Theme as (he/she1) goes to spoil the Christmas decorations.
(Player1) lands a 1080 on his/her snowboard in front of the Cornucopia. (Bloodbath)
(Player1) and (Player2) arrive on scene in the Jamaican bobsled. (Bloodbath)
(Player1) asks if (Player2) wants to build a snowman. (Player2) then kills (Player1) and hides the body in a snowman. (Day only death. It was a little too long to fit in so it will have to be rewritten somehow.)

Removed vanilla events and elements:
Grabbing a shovel (it's a Bloodbath event; strangely enough, it never shows up)
Tridents
Sais
(Player1) goes hunting. (Day event. I don't think it ever shows up.)
(Player1) camouflauges (himself/herself1) in the bushes. (Note the typo. Ha.)
(Player1) collects fruit from a tree.
(Player1) is pricked by thorns while picking berries.
(Player1) picks flowers.
(Player1) makes a slingshot. (Pretty much the only vanilla event involving slingshots.)
(Player1) climbs a tree to rest. (Eh. I just don't think coniferous trees are for climbing. Same reason the deaths by falling out of trees have been removed. This is the only nonfatal night event removed.)
(Player1) takes a staff leaning against the cornucopia. (Feast-only event. This is the only nonfatal Feast event that is removed. I think this is the only event involving staves.)
(Player1) steps off (his/her1) podium too soon and blows up. (Bloodbath death. It never shows up, anyway.)
(Player1) and (Player2) work together to drown (Player3). (Only in the Bloodbath.)
Double suicides
Suicide pacts (of course)
(Player1) pushes (Player2) off a cliff during a knife fight. (Only in Bloodbath. Seems a bit weird to happen that early, but that's just me.)
(Player1) unknowingly eats toxic berries.
Deaths by falling out of trees. (May be re-added if there is popular demand for them.)