So was it hot in San Francisco yesterday or what?

[tstieber]

Originally Posted by Chimérique

Weird, I don't remember Indian summer going through mid-november, usually by Thanksgiving the temps are too cool for any swimming and our rainy season has already started.

I remember it both ways. It's not always the same every year. I remember only a few Thanksgivings warm enough to wear shorts during the day, and I remember a few drought years where it stayed in the 70s into early December. I also remember Thanksgiving being chilly and wet. I also remember going to the beach in mid November just within the last few years and other years where that wasn't possible. So it varies. There is no "rule" that you can depend on. I know from watching local news that by November 1st, average high temps are hovering right around 70f and start dropping quickly. I will say that my husband's birthday, a few days before Halloween, almost always had warm, sunny weather but was often followed by a Halloween cooldown that sometimes recovered back into warm weather and sometimes not. Of course, it's possible to have a freak warm spell in mid winter again too. It's that time of year what things turn fickle, by California standards.

[Chimérique]

AVERAGE Lows Temps - Halloween, Oct 31

*Denver, CO 29F

*New York City 42F
Ukiah 44F
*Portland, Oregon 45F
Santa Rosa 46F

Napa 47F
Santa Cruz 47F

Sacramento 49F
San Jose 49F

SAN FRANCISCO 52F
Oakland 52F

Los Angeles 56F
*Phoenix, AZ 59F

*For perspective

NorCal Cities bolded

[tstieber]

Originally Posted by Chimérique

AVERAGE Lows Temps - Halloween, Oct 31

*Denver, CO 29F

*New York City 42F
Ukiah 44F
*Portland, Oregon 45F
Santa Rosa 46F

Napa 47F
Santa Cruz 47F

Sacramento 49F
San Jose 49F

SAN FRANCISCO 52F
Oakland 52F

Los Angeles 56F
*Phoenix, AZ 59F

*For perspective

NorCal Cities bolded

Interesting data, but nobody trick or treats at 6 am when you have the morning low...

And if course, nobody trick or treats at 2 pm either, so high temps aren't that useful either... But they give additional insight into the overall weather patterns.

Couldn't find average high temps, but current long range forecast high temps for Halloween are:

Santa Rosa 74
San Jose 71
Phoenix 83
Portland 58
Sacramento 73
Seattle 56
Los Angeles 78
New York 65
Oakland 71
Denver 59

It'll be cooler than that after dark, of course, but the point is those CA daytime temps are not in winter territory quite yet. Definitely a transitional time of year and the very tail end of Indian Summer (which is technically a misnomer in CA). A nice time of year IMO, not too hot and not too cold.

[Chimérique]

Originally Posted by tstieber

Interesting data, but nobody trick or treats at 6 am when you have the morning low...

And if course, nobody trick or treats at 2 pm either, so high temps aren't that useful either... But they give additional insight into the overall weather patterns.

Couldn't find average high temps, but current long range forecast high temps for Halloween are:

Santa Rosa 74
San Jose 71
Phoenix 83
Portland 58
Sacramento 73
Seattle 56
Los Angeles 78
New York 65
Oakland 71
Denver 59

It'll be cooler than that after dark, of course, but the point is those CA daytime temps are not in winter territory quite yet. Definitely a transitional time of year and the very tail end of Indian Summer (which is technically a misnomer in CA). A nice time of year IMO, not too hot and not too cold.

I'm not a fan of long range forecasting especially when you looking for relieable historical data.
It would be easier if you put those stats in ascending or descending order.

We always focus on high temps so it is nice to focus on low temps for a change. Besides a lot more people are awake and OUTSIDE at 6-7am than you think.

Oct 31 was chosen not because of Halloween or Trick or Treating, but because some of us feel it is "milestone" "a marker" of when the weather has shifted to consistently cooler colder temps for the rest of the season.