When was your earliest and latest ice day (0°C/ 32°F) on record? (temperature, 2014)
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Hmm. Would have guessed there wouldn't be much March-February difference as you don't have big temperature month to month and the seas are still cold. Ithaca, NY got 16 inches of snow on April 17, 2007 but the high was 33°F so ice day. Snow was gone after two days. One week later it reached 81°F.
March can still have February-like days but it is still very much spring here. The three winter months all average 5.something/0.something but March gets 8.1/1.7.
The snow alone in March 2013 was the first time we'd had that much last for that long since at least 1996 (older snow data is nearly impossible to come by), so that would have been a memorable event even in January. Snow in the second half of March isn't that rare but it is rare to have it stay intact all through the day. Coincidentally 1996 was also the last time we had had an ice day in March, so it shows that they don't happen very often. We still average six ice days a year though going by 1981-2010, so I'm guessing we should expect two every year in February?
I was actually still living in London then though, where there was only about an inch or so of snow (at least in the part of town I was living in) but it was still freakishly cold for the time of year - if I remember rightly something like 82 consecutive hours at or below freezing. The latest ice day I could find for there before 2013 was 7 March in the really cold winter in 1947, and there had only been one March ice day since then and that on the first day of the month in 1986, but look at the 24th that year, holding under -1C all through the afternoon! The average is about 12C at that time of year and 5C would count as a particularly cold day, so -1C in mid-afternoon somewhere in London after the spring equinox was so unusual that I honestly think all the monthly warm records will be broken before it happens again.
I thought that the -1.1°C high on March 23th 2013 was pretty late and in fact it was the second latest ice day here since recordings began in 1949.
The latest was on March 27th 1952 with an even more impressing high of -1.8°C.
We did not have an ice day in April yet, but in 1966 we came close with two consecutive days having a high below 1°C (0.5°C and 0.4°C respectively) so with the right setup that should still be possible, especially considering that these two days were in Mid April.
As for the earliest ice day on record, it can appear in early November, November 3rd 1980 was the earliest here with a high of -0.7°C.
We had a snowfall day in October 24th 2003 (was also the earliest settling snow on record) when the high did not rose above 1.1°C, so if we get such an early snowfall again, it might be possible that an ice day could already occur in October, though the chance is not as high as in April.
I didn't do a search but April 6-7, 1982 in New York City come to mind. Link to April 6, 1982 and April 7, 1982. While April 6, 1982 shows a 41F, or 4C high, that occurred at midnight and it was snowing heavily within a few hours. 10" or 25 cm snow fell that day.
Here in Northern Maine it can snow in any month of the year. It snowed once on the 4th of july. We're due for 7 to 15 inches tomorrow.
You're either very high elevation or making up numbers. The northernmost station with a decent period of record that I could find hasn't even recorded flurries in July (that 1954 was likely hail)
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