This one's about the Finnish people. It was not my intention to offend anyone, so if anyone does feel offended I am very sorry and will ask the moderators to remove it.

+15°C / 59°F
This is as warm as it gets in Finland, so we'll start here.
People in Spain wear winter-coats and gloves.
The Finns are out in the sun,getting a tan.

+10°C / 50°F
The French are trying in vain to start their central heating.
The Finns plant flowers in their gardens.

+5°C / 41°F
Italian cars won't start.
The Finns are cruising in cabriolets.

0°C / 32°F
Distilled water freezes.
The water in Vantaa river (in Finland) gets a little thicker.

-5°C / 23°F
People in California almost freeze to death.
The Finns have their final barbecue before winter.

-10°C / 14°F
The Brits start the heat in their houses.
The Finns start using long sleeves.

-20°C / -4°F
The Aussies flee from Mallorca.
The Finns end their Midsummer celebrations. Autumn is here.

-30°C / -22°F
People in Greece die from the cold and disappear from the face of the earth.
The Finns start drying their laundry indoors.

-40°C / -40°F
Paris start cracking in the cold.
The Finns stand in line at the hotdog stands.

-50°C / -58°F
Polar bears start evacuating the North Pole.
The Finnish army postpones their winter survival training awaiting real
winter weather.

-60°C / -76°F
Korvatunturi (the home for Santa Claus) freezes.
The Finns rent a movie and stay indoors.

-70°C / -94°F
The false Santa moves south.
The Finns get frustrated since they can't store their Kossu (Koskenkorva
vodka) outdoors.
The Finnish army goes out on winter survival training.

-183°C / -297.4°F
Microbes in food don't survive.
The Finnish cows complain that the farmers' hands are cold.

-273°C / -459.4°F
ALL atom-based movent halts.
The Finns start saying "Perkele, it's cold outside today."

-300°C / -508°F
Hell freezes over.
Finland wins the Eurovision Song Contest
Some more jokes:

Mum knows everything:

Mum taught me how to respect a well done job: If you want to kill each other do it outside. I've just cleaned the carpet.

Mum taught me the basics of logic: Why? Because I said so.

Mum taught me how to behave properly: Stop behaving like your father.

Mum taught me the basics of irony: If you don't stop screaming, I'll give you something to scream about.

Mum taught me how to twist my body into extreme positions: Just look at that dirt on your neck.

Mum taught me patience: You will sit here until the vegetables disappear.

Mum taught me the basics of meteorolgy: Your room looks like it has been hit by a tornado.

Mum taught me about expectation: Just you wait when we get home.

And mum taught me one last wisdom: When you'll be my age you'll understand.

I found it funny.
Haha, Lol.

Didn't your father told you the truth: Your mum is always right! Emotion: smile
Students: We have free audio pronunciation exercises.
Good one, maj.Emotion: big smile
Nice jokes Lana, are you from Finland???

It's funnt that you mention the Eurovision song contest. People here (in Malta) take the competition so seriously when everyone knows it's just a joke.
No, I'm not from Finland, that's why I apologized at the beginning. Actually, I don't know anything about the Finns otherwise and have really nothing against them, but this joke isn't that offensive, I think. It's more about the weather than it is about people themselves.

I can post some jokes about my country as well, if you'd like to see them, but it'll take some time.
Students: Are you brave enough to let our tutors analyse your pronunciation?
LanaNo, I'm not from Finland, that's why I apologized at the beginning. Actually, I don't know anything about the Finns otherwise and have really nothing against them, but this joke isn't that offensive, I think. It's more about the weather than it is about people themselves.

I can post some jokes about my country as well, if you'd like to see them, but it'll take some time.
As a Finn I can assure you that the joke is hilarious and not offensive in any way. Emotion: smile