Tell us when you expect the first snowfall of the season and when you expect the last snowfall. Date or week/month.
I moved to Sierra Vista in May, so I have nothing to compare to. But according to Wikipedia, average is 0.3" sometime in January. Before, I lived in San Francisco, Orange County CA and Phoenix. Not known for their snowfalls. But my favorite vacation spot near Alpine AZ got their first snow on10/24!
So when do you expect the first and last snows?
First snow: Last Sunday
Last snow: Harder to predict
Here in suburban Chicago, I’d typically expect the first significant snowfall to be around mid-November; but, we got some flakes already two weeks ago.
Final snowfall usually around the first week of April.
{{Shakes fist at 74westy}} You beat me to it!
Some time in late April or early May would be my guess.
Supposedly tonight snow and rain. I’ll update if it doesn’t.
In Sacramento, CA, I’m not. Apparently, snow here in the Central Valley is VERY rare. As for the Sierras not too far away, not sure when exactly, but ski resorts are expecting to open generally around mid-November.
Last snow? Looking at last year’s history, probably around April.
There’s a photo on the wall at Steamers in Old Sac with a man on cross-country skis in front of the Capitol, from sometime in the 1800s I would guess. Looks like about a foot of snow!
Around Tahoe, it used to be expected that you’d have that first day on the slopes by Thanksgiving. Now you’d be lucky to have that by Christmas, and nowadays early-season resort opening is more dependent on snow-making capability, sadly.
In my area of front range Colorado, it was not uncommon to expect the first snow on or about Halloween. With the warmer temps of the last decade or so, it’s been less common, but we’ve had plenty of late night lows below freezing.
The bigger issue is the general semi-arid nature here. But all thing being equal, I’m guessing it’ll be around mid-November when we’ll wake up with the first faint dustings of overnight snow.
As for last snow, I’ve seen it as late as mid May, although that was exceptional. Generally, one last major snow around mid April is the expectation.
Sydney. Not expecting any snow
You mean there a period of time when you don’t expect snow around in your parts?
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I have seen snow every month except July. Dustings, in June and August, but snow.
I don’t expect it in July, but somehow I wouldn’t be surprised.
Our last snowfall was sometime during the last Ice Age. Our next snowfall will be sometime during the next Ice Age. Or maybe the one after. Which is still a bit too soon for comfort in my book. 
Beyond that wry and (I hope) funny threadshit …
For me personally, not my residence, it’s a question and answer more in line with the spirit of the OP.
At work I typically encounter snow on the ground by 1 Dec. And will have been in an active snowfall by Christmas. Despite diligent efforts to steer my work towards warmer climes, sometimes my employer has … contrary … ideas.
On Oct 18 I was in Detroit. It was not snowing on the ground, but it was lightly raining and 42F midafternoon. The droplet size and felt temp of the rain made it clear it had been snow up at altitude and had just barely melted on its way to the ground. So I was within a couple miles of active snowfall, but it was a couple miles up, not out.
We shall see how Winter 2022/23 unfolds.
For USA-ians, here’s NWS’s page dedicated to all things snow:
National Snow Analyses - NOHRSC - The ultimate source for snow information (noaa.gov)
Around here in north/central NJ, it could be as early as October, or as late as February. Thinking back over the past few decades (my memory goes back to the ‘80’s,), we used to get significant snow before Christmas most years, but now it seems that there’s usually almost none until January.
Could be any time now. I was looking back at weather records this morning and the night low was 13F on November 11 last year. We had significant snow in May two years ago, but it doesn’t stay long or build up at that time of year. We’ve had a flukeyl warm patch with nights over 50F last week but that’s due to change tomorrow with high twenties at night.
We just got our first snow a week ago last Thursday, in the form of flurries strong enough to look very wintry outside. Didn’t accumulate because the ground was still too warm, but that’s about the earliest I think I’ve seen snow around these parts.
Mid November and Early April here in Southern New England.
I assume the question pertains to the region in which we live, and I assume you mean a measurable snowfall and not just some flurries during the coldest part of the night. That’s too bad for me because Chicagoland is notorious for having weather that is very hard to predict.
Our early October was so cold that I was expecting snow for Halloween. Now, the weather pattern has changed, so it looks like latter november. I’ll stick my neck out and say, November 21, and the last snowfall on March 8.
Interesting. I would have expected you to give an end date of at least a month later. Even here, I expect some snow into late March.
Well, we’ve been in a La Nina weather pattern for quite a while, now, so I’m expecting it to flip to the El Nino pattern, which would give us a very warm spring. I’m just “playing a hunch”. LOL
Southern Ontario here. It has not been below freezing yet this season and mostly not even close. Yesterday was T-shirt weather. First snowfall will likely be towards the latter part of November, but sometimes there’s no snow until closer to Christmas. It’s always a toss-up whether we will get a white Christmas.
Last snowfall is likely to be sometime in early March, but that gets into the season where snow typically doesn’t stay on the ground long if at all. I believe my snowplowing contract runs until mid-April but any significant snow past mid-March would be very unusual. I do remember one year when we had a freak snowfall in April which started to melt and then froze over, creating a real mess for a few days. But the effects of global warming seem more evident every year. April is the month where spring becomes very visible.
Here in the Boston suburbs, the average first measurable snow falls at the end of November. That is wildly variable however, we’ve had it in late October, and we haven’t had it until December.