Bill_de Loc: US

... could Spring be right around the corner? Watching the feeder outside my kitchen window I'm seeing Blue Jays, Cardinals, and Chickadees all showing up in pairs.

Sixty Five would be a lot nicer than Twenty Five.

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alliebess Loc: suburban Philadelphia

And my daffodils sprouted a week ago despite the cold weather. Flowering quince bushes have buds.

PhotogHobbyist Loc: Bradford, PA

Right now I'd take your 25. Around 9AM today, 1/22/22, it was -13 and felt like it here. We've been in a deep freeze mode for the past several days and it isn't letting up until late next week.

DirtFarmer Loc: Escaped from the NYC area, back to MA

How cold did it get?

happy sailor Loc: Ontario, Canada

We got down to -22F this week and now getting a little above 0 today, the feeders have been very busy, 6 to 10 cardinals at a time 4 or 5 blue jays, countless junkos , house finches and black cap chickadees. Then the mourning doves and everyday hairy and downy woodpeckers.

But spring soon, I wish but no, don’t expect to see robins for two months yet.

Stay warm

Jack47 Loc: Ontario

All three spend the winter here I feed them every morning and we’ve had a few early mornings here when it’s been -30 c. and colder.

StanMac Loc: Tennessee

I've had daffydils out of the ground since late December - weird ....

Stan

sippyjug104 Loc: Missouri

I've often wondered if it was zero outdoors today and it might be twice as cold tomorrow...how cold would that be?

happy sailor Loc: Ontario, Canada

that is a question best pondered over the contents from your sippy jug, lol

chasgroh Loc: Buena Park, CA

...so where in the US are you?

DirtFarmer Loc: Escaped from the NYC area, back to MA

Depends on where you live.

If you're in the US, temperatures are measured in degrees Fahrenheit. If I recall correctly, zero was defined as the coldest temperature you could achieve with an ice-salt mixture. Zero Fahrenheit is not the lowest temperature in the scale. Thermodynamics defines absolute zero as the coldest possible temperature, which would be -459.67 degrees F. So if it were twice as cold tomorrow it would be -229.835F.

If you're in almost any other country, temperatures are measured in degrees Celcius. Zero is defined as the temperature at which pure water freezes. Absolute thermodynamic zero is -273.15 degrees C. So twice as cold would be -136.575C. That would be equivalent to -213.835F.

Either way, you would be very uncomfortable. But fortunately, it would not be a low enough temperature to produce oxygen rain (-293F).

PS: in the Celsius scale, 100 is defined as the temperature at which pure water boils at sea level average pressure. The Fahrenheit scale originally defined 90 as the average human body temperature (best estimate at the time [1724]). That point was later redefined to be 96. Later the scale was defined by the freezing point of pure water at 32. In the 20th century the scale was defined by the freezing and boiling points of pure water, 32F and 212F.

Bill_de Loc: US

Delaware

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mundy-F2 Loc: Chicago suburban area

I agree, it is not getting warmer in Chiago.I don't mind 25 degrees, but -10 is too cold.
Mundy