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This should be interesting... Average snow free season in Alert, Nunavut in the second half of the 20th century. Data is 1955-1999. Measured from first snow-free day to last snow-free day in the year (there may be days with snow on the ground in between these dates)
Average snow free season is July 10 - August 26, and measures 46.7 days long.
The longest snow free season was 1981, June 27 - September 12 (77 days)
1972 and 1992 did not have a snow free season, all days had snow on the ground.
The first day of the snow free season ranged from June 13 - August 24, the former in 1971 and latter in 1995.
The last day of the snow free season ranged from August 6 - September 16, the former in 1970 and the latter in 1995.
I'll have to do a snow free season on Eureka, seems like it would be longer. Eureka is definitely colder during the colder half of the year but its summer is warmer and longer (average highs in Eureka at the height of summer are ~48 F / 9 C, whereas they are ~43 F / 6 C in Alert) and above freezing average highs last from about June 1 - September 5 in Eureka as opposed to June 12 - August 30 in Alert.
Eureka is colder from October to April (7 months) inclusive, and Alert is colder from May to September (5 months) inclusive.
Eureka's snow free season, I'm going to compare 1955-1999 and 1988-2017. The '55-99 data is for direct comparison with Alert and the '88-17 is data for the most recent 30 years, a common period used in climate normals.
Average snow free season is June 21 - September 7 from 1955-1999. That's 78 days (compared to Alert's 46)
Average snow free season is June 16 - September 5 from 1988-2017. That's 81 days.
The longest snow free season was 1956, June 22 - October 18 at 118 days.
Honorable mention goes to 1998, June 6 - September 30 at 116 days.
The shortest snow free season was 1985, July 1 - August 22 at 52 days.
The first day of the snow free season ranged from June 1 - July 9, the former in 1991 and the latter in 1970.
The last day of the snow free season ranged from August 13 - October 18, the former in 2000 and 2013 and the latter in 1956. This October 18 was an outlier; second-latest day was September 30 in 1998.
Interesting fact: 1956 was snow free as late as October 18 due to an exceptionally dry early fall. Less than 1 cm of snow fell in September, and only a trace from October 1-17. Temperatures were as low as -30 C / -22 F with no snow on the ground. It must have been surreal. Some years had late snow free dates for the very reason that Eureka is dry - it can be extremely cold, but if no snow falls, there will be no snow depth.
Mean temperature in some Serbian cities and places in January 2017, and comparation with mean temperature in January 1985 and with average mean temperature for period 1961-1990 / 1981-2010.
Check this out... So Cool!. Awesome idea for a graph! This confirms Spring and Fall were shorter than normal.
Using the warmest 92 days for Summer, Coolest 91 days for Winter... Not sure how he got Spring and Fall.
For JFK... Spring in April and May.
Summer looks like it was June-July-August-September.
Some Fall temps in September.
Mostly Fall in October (hmmm, I might argue that actually)
Winter temps started in November
Any day between January 20 and July 20 that’s an intermediate temperature is called spring temperatures, after July 20 autumn. Neat graphic;
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