A break in clouds over the Nova Scotia-New Brunswick border, 03 June 2017 (Dearing)
The last couple of days had near record lows in Greater Moncton with temperatures dropping to near the freezing point.
A low of 1.0 C at the airport on Monday was close to the 1947 record of 0.6 C while a low of 0.0 C on Tuesday tied the minimum from 1995.
Fortunately cloud cover prevented frost in most of New Brunswick but another risk is possible by early Wednesday.
Folklore suggests frost can be expected until the full moon in June which is this Friday the ninth.
Ominous clouds near Nova Scotia-New Brunswick border, 03 June 2017 (Dearing)
Weather conditions have been cool and unsettled in the Maritimes over the past several days.
While driving in Nova Scotia on Friday, I encountered everything from clouds and heavy downpours to a clearing sky with bright sunshine to clouds and rain again.
On the way home to New Brunswick on Saturday, I encountered similar conditions.
In Greater Moncton today, the thermometer climbed to a daytime high of only 10.6 C under a dreary sky which is about 10 degrees below normal for early June.
Forecasters say warmer, more seasonal temperatures will return by Wednesday but not before a risk of frost in Southeast New Brunswick by early Tuesday.
Snow covers a vehicle in Aviemore, Scotland, UK, 25 April 2017 (BBC Weather)
Arctic air has enveloped the United Kingdom with heavy snow in Scotland and northern England and near freezing temperatures as far south as London.
Forecasters say snow in late April is not uncommon and actually fell over parts of the country around the same time last year.
Temperatures struggled to reach 10 C today after a hard frost early this morning.
This cold snap is a far cry from record breaking heat earlier this month when the thermometer climbed to 26 C in southern England and a mild March which was the fifth warmest ever for the U.K.
Fall colours past peak, Centennial Park, Moncton, 16 Oct 2016 (Dearing)
It’s not surprising the days gradually get cooler in October but it was a sudden change in Greater Moncton when temperatures went from mild to cold during the last week of the month.
A warm, humid daytime high of 20.5 C on 22 October will undoubtedly be the last time the thermometer climbs above 20 C in this calendar year.
Although a couple overnight lows fell below freezing early in the month, a hard frost was not reported until 27 October.
Almost 50 mm of rain fell on Thanksgiving weekend in Southeast New Brunswick – far less than other parts of the Maritimes such as Cape Breton Island with over 220 mm.
OCTOBER 2016 ALMANAC (at Greater Moncton International Airport, 1981-2010)
Average HIGH 14.5 C
Average LOW 3.6 C
AVERAGE 9.0 C (about 1.4 degrees ABOVE normal)
Extreme HIGH 24.4 C (07 October)
Extreme LOW -2.8 C (28 October)
RAINFALL 99.8 mm (about 10 percent BELOW normal)
(Data courtesy Environment Canada)
Frost covers a maple leaf (Twitter)
Scattered frost has dotted the landscape of Greater Moncton a couple of times in the last week or so.
But the thermometer dipped below freezing early today to -1.5 C which brought widespread frost and effectively put an end to the growing season.
The last time it fell below zero was 15 May which means 2016 had about 142 frost-free days.
A hint of fall colour in Irishtown Nature Park, Moncton, 24 Sept 2016 (Dearing)
Autumn only began a few days ago but it is already feeling fall-like and a frost advisory has been issued for most of New Brunswick.
Environment Canada says a cold air mass will remain over the province with overnight low temperatures approaching zero in some areas.
Frost is expected to be more significant in low lying areas away from coastal waters.
Incidentally, the average first frost date in the fall is 27 September.
The low in Greater Moncton this morning was 2.8 C with patchy frost reported.
UPDATE: On Sunday morning, the temperature fell to 1.8 C.
Dark clouds over NE Moncton, 31 May 2016 (Dearing)
The warmest temperature so far in 2016 was recorded in Greater Moncton this afternoon with a warm high of 29.5 C – beating today’s record of 29.3 C from 1999.
But a strong cold front moved across Southeast New Brunswick which prompted Environment Canada to issue a severe thunderstorm warning shortly after 6pm.
In less than an hour, the temperature dropped nine degrees from 27 C to 18 C and hail was reported north of Moncton.
The front has ushered in much cooler temperatures with a high tomorrow of only 13 C and a risk of frost by early Thursday morning.
Hummingbird feeder awaits visitors in NE Moncton, 18 May 2016 (Dearing)
If you have any sensitive plants outside, bring them indoors tonight!
Frost is possible for all of New Brunswick overnight especially in low-lying areas.
Environment Canada says light winds and clear skies will allow temperatures to fall near freezing by early tomorrow.
The average last spring frost date in Greater Moncton is 24 May while in Saint John it is 18 May.
NB Highway Camera, Shediac, NB, 17 Nov 2015
One of the coldest days yet this fall in Southeast New Brunswick began with accumulating snow on the outskirts of Greater Moncton and ended in a clear, frosty night falling to -4°C before midnight.
About 5 cm of snow fell this morning in the Shediac area and snow plows hit the roads for the first time this season.
Nova Scotia’s Cumberland and Colchester counties also had several centimetres of snow with slippery roads blamed for a vehicle rollover near Springhill.
Frost covers a maple leaf (Twitter)
The 2015 growing season is officially over in Greater Moncton.
A killing frost occurred overnight when the thermometer dipped to a low of -2.1 C which is the lowest value in Southeast New Brunswick since late April.
Temperatures were typically a bit colder in the northern part of the province, bottoming out at -5.0 C in Edmundston.