Residents of Saint John and the surrounding county should prepare for chilly temperatures as Environment Canada has issued a frost advisory for the region. The advisory, announced at 3:38 PM ADT on Thursday, October 9, 2025, warns of potential frost early Friday morning.

According to the official alert from Environment Canada, a combination of clear skies and light winds will cause temperatures to fall significantly, creating widespread frost and freeze conditions.

What to Expect

Temperatures are forecast to drop to between minus 5 and plus 1 degrees Celsius overnight. These conditions are expected to develop early Friday morning, posing a risk to sensitive plants and crops across New Brunswick.

How to Protect Your Plants

Frost can cause significant damage to vegetation, especially in frost-prone areas. You should take preventative measures to protect your gardens and any sensitive outdoor plants.

Key recommendations include:

• Covering plants with fabric, blankets, or inverted containers to trap heat.
• Bringing potted plants indoors or moving them to a sheltered location, such as a garage or covered porch.

These simple steps will help protect your plants from the damaging effects of the expected frost.

Frequently Asked Questions

What is a frost advisory?

A frost advisory is issued during the growing season when temperatures are expected to fall to the freezing mark. This can lead to the damage or destruction of plants and crops.

When is the frost expected?

The frost is expected to form in the early morning hours of Friday, October 10, 2025.

How cold will it get?

Environment Canada forecasts minimum temperatures to range from minus 5 to plus 1 degrees Celsius.

What should I do to prepare?

The primary recommendation is to cover any sensitive plants or crops, especially if they are in low-lying, frost-prone areas. Bringing smaller plants inside is also an effective measure.