Finnish weather explained

 15°C / 59°F
This is as warm as it gets in Finland, so we'll start here.
People in Spain wears 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 the Vanda 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 "grilli-kioski".

-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.