Nova Scotia·Weather

Plans for the garden? Beware of Jack Frost

CBC meteorologist Ryan Snoddon says following a warm push, temperatures are set to cool again in the second half of May.

Following a warm push, temperatures look set to cool again in the second half of May

Person using trowel to lift orange marigold plant out of pot. Other flowers are seen in pots in background.
CBC meteorologist Ryan Snoddon says you may want to think twice before planting anything frost-sensitive. (CandyBox Images/Shutterstock)

It's safe to say that spring has been sluggish so far here in the Maritimes.

Sure, we've seen some nice days and warm pushes — although not many on weekends — but for the most part temperatures have ebbed and flowed and averaged near seasonal.

That, of course, makes this latest warm-up all the more welcomed as temperatures surge into the high teens and low to mid-20s over the next couple of days, peaking on Thursday.

yellow map of maritime provinces
Temperature map for Nova Scotia, P.E.I. and New Brunswick on Thursday. (CBC)

While this warm-up may have you thinking about getting your hands dirty in the garden, you may want to think twice before planting anything that's frost-sensitive.

Looking at historical climate normals, we see that average last frost dates are in the second half of May for most of the Maritimes and the threat exists for some even into early June.

map of maritime provinces colour-coded to reflect last average frost days.
Average last frost days in the Maritimes. (CBC)

Many folks believe that anything frost-sensitive should wait to be planted until after the full moon in June. Interestingly enough, this year the strawberry moon will occur on June 11, which lines up with historical normal last frost dates.

As for our forecast, temperatures are indeed set to cool back to seasonal throughout the weekend, before turning below seasonal for early next week, as a system moves into the region with more clouds and showers.

Beyond that takes us into grain-of-salt territory. However, long-range guidance is signalling that temperatures will be near to below average during the final stretch of May.

map of north america
Temperature outlook May 21 to May 28. (Environment Canada)

The good news is the near seasonal temperatures and persistent systems that have been through the region with rain have helped with the dry conditions that had taken hold throughout the winter months.

While we are still experiencing abnormally dry conditions across a large part of Nova Scotia, including eastern areas of the Annapolis Valley, the latest update from the Canadian Drought Monitor says conditions have improved.

These more favourable drought conditions are key for the spring wildfire risk and important as we get set to turn the page into the warm summer season when widespread rains are harder to come by. 

As for that summer forecast, long-range climate models continue to signal warmer than average conditions across the region for the months of June, July and August.

Map of Maritime provinces.
Environment Canada's drought monitor map. (Environment Canada)

ABOUT THE AUTHOR

Ryan Snoddon

Meteorologist

Ryan Snoddon is CBC's meteorologist in Nova Scotia and New Brunswick.

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