Risk of frost!

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Frost covers a maple leaf (Twitter)

New Brunswick and most of Nova Scotia are under a frost advisory for tonight and tomorrow night.

Cold air, light winds and few clouds will allow temperatures to fall near the freezing point and patchy frost is expected.

The average last frost date in spring for Greater Moncton is 23 May.

Farmers are already suffering from tremendous losses in the region with crops such as grapes, strawberries, blueberries and apples being hit by a recent hard frost with a low of -4 C in some areas.

June has gotten off to cold start with snow flurries reported in Charlottetown this week and accumulating snow in the highlands of Cape Breton and St. John’s, Newfoundland.

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Last frost of spring?

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Frost covers a maple leaf (Twitter)


When the temperature dropped to -0.3 C early this morning, frost could be found in Greater Moncton.

The coldest low in New Brunswick was -5.9 C at Edmundston!

Thanks to cool, dry air with no cloud cover, Environment Canada has issued another frost advisory for tonight.

But keep in mind it’s not that unusual based on the 30-year average (1981-2010).

The average last spring frost date is 23 May in Greater Moncton and the first fall frost is 2 October for a growing season of 131 days.

Patchy frost!

Patchy frost in NE Moncton, 01 Oct 2017 (Dearing)

Perhaps it’s fitting that October has begun with patchy frost in Greater Moncton given that autumn weather arrived abruptly just days ago following a stretch of hot summerlike conditions.

Environment Canada had issued a frost advisory for three nights running (and another one has been issued tonight) for Southeast New Brunswick but frost finally made an appearance early today when the thermometer dropped to -1.0 C.

Fortunately, the flower boxes on my balcony were not affected and I brought my tomato plant inside just in case.

The last time the temperature fell below freezing in Greater Moncton was 06 June which means 116 days were consecutively above freezing in 2017. 

Early frost advisory in N.B.

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Frost covers a maple leaf (Twitter)


Environment Canada issued a frost advisory late Sunday afternoon for Greater Moncton and Southeast New Brunswick – almost a month before the average date of the first fall frost.

Clearing skies and light winds with temperatures falling into the lower single digits could have resulted in scattered frost.

However, the frost advisory ended early this morning when the threat was no longer expected.

The low at the Greater Moncton International Airport was 7.2 C which is several degrees away from any threat of frost.

However, the morning low in Edmundston was a chilly 1.1 C.

Unusual mid-summer cool snap

Sunset at Parlee Beach, NB, 18 July 2017 (Dearing)


Late July is typically the warmest period of summer in Greater Moncton but a recent cool down has brought September-like days and a record overnight low. 

On 23 July, the temperature fell to 6.9 C at the Greater Moncton International Airport which broke a record low of 7.2 C from 1962. 

A frost advisory was posted in northwest New Brunswick with a chilly low of 2.4 C in Edmundston. 

The short term forecast calls for more seasonal highs in the mid-20’s C and lows near 13 C. 

Warmer weather ushers out cold

Brilliant pink sky over NE Moncton, 06 June 2017 (Dearing)


At least one New Brunswick location dropped to a new low on 06 June.

Environment Canada says Kouchibouguac National Park set a new cold record of -1.7 C which broke the old minimum of -1.1 C from 1958.

Greater Moncton managed to escape frost this week thanks to cloud cover although the thermometer fell to the freezing point tying a record low.

Following a brief period of very warm air, forecasters say temperatures will reach near seasonal values for the short term.

Near record cold in N.B.

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.

Cool, unsettled start to June

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.

Winter returns to the U.K.

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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.

October 2016 – Mild then cold

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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)