What is your average annual last and first day below 50 F (10 C)

[Hemlock140]

We are getting close to the 50F and below days, on average I would say late-October, by Halloween. We cannot depend on it being over 50 reliably until early-mid-June.

[Strawhats]

It usually correlates with the first freeze, so early November for the first day and late March for the last day with a high at or below 50°F (10°C).

[Vasily]

Greenville, South Carolina, USA: the lowest high here is on January 18th, 52 degrees. That's the lowest high of the year (we've had one 3" snowfall the last two winters - snowmen don't last long around here). So for us, there are no last and first days with highs below 50.

[katharsis]

October 30 and April 12

This is a good link:

https://www.cleveland.com/datacentra...archAgain=true

[Anhityk]

My last day below 50 F (10 C) is 14 April,
my first day below 50 F (10 C) is 13 October.

[Jakobsli]

Average daily high/max (1991-2020), a few days uncertainty will be shown:

Trondheim Airport Værnes:
Last day in spring below 10C: Apr 19 - 21th
First day in autumn below 10C: October 11 - 13th

Other places in Norway:

Oslo (Blindern, 94 m):
Last day in spring below 10C: Apr 9 - 14th
First day in autumn below 10C: Oct 14 - 17th

Bergen (Florida, 12 m):
Last day in spring below 10C: Apr 12 - 16th
First day in autumn below 10C: Oct 27 - 30th

Bodø Airport (Arctic):
Last day in spring below 10C: May 12 - 15th
First day in autumn below 10C: Sep 30 - Oct 4th

Kautokeino (305 m, Arctic):
Last day in spring below 10C: May 25 - May 27th
First day in autumn below 10C: Sep 16 - 18th

This is the average, there can be days below 10C later in spring or earlier in autumn. Just as there can be days above 10C in winter - especially common on the West coast like in Bergen, but can also occur in larger parts of the country. Last January we had four days above 10C at Trondheim AP.