Saint John Weather Forecast For May 22 Weekend Brings Sun And Frost Advisories

by Johnny | May 22, 2026 | City, Weather | 0 comments

Get ready for a bright but chilly weekend. The Environment Canada weather forecast for Saint John predicts abundant sunshine for Friday, May 22, and Saturday, May 23, along with cold nights that prompted a frost advisory.

Frost Advisory in Effect

Environment Canada issued a yellow advisory for frost covering Saint John and County. You need to protect your plants that are sensitive to cold. Temperatures drop to near freezing on Friday night and Saturday night. Low lying areas see temperatures fall to minus 1.

Friday and Weekend Forecast

Sunny weather icon

Image sourced from Environment Canada

Friday brings sunny skies with a high of 16 degrees. Northwest winds blow at 20 kilometres per hour and gust up to 40 kilometres per hour in the morning. Friday night stays clear as winds calm down, and the temperature drops to a low of 3 degrees.

Saturday offers more sunshine and warmer afternoon temperatures. Expect a high of 19 degrees and a high UV index of 6. Make sure to wear sunscreen if you spend time outdoors. Saturday night remains clear with a chilly low of 1 degree.

Sunday starts with a mix of sun and cloud and reaches a high of 17 degrees. Prepare for a change in the evening. Showers arrive Sunday night and bring the temperature down to a low of 7 degrees.

Looking Ahead to Next Week

You will need an umbrella to start the work week. Monday brings showers and a cooler high of 14 degrees. The rain continues into Monday night with a low of 9 degrees.

Tuesday warms up significantly. The city sees a mix of sun and cloud with a high of 22 degrees. Clouds roll in on Tuesday night, dropping the temperature to 10 degrees.

Wednesday keeps the mix of sun and cloud with a high of 16 degrees, followed by cloudy periods and a low of 8 degrees at night. Thursday remains cloudy with a daytime high of 15 degrees.

Frequently Asked Questions

Is there a weather warning for Saint John?

Environment Canada issued a frost advisory for Saint John and County. The advisory covers late Friday night into early Saturday morning, and it applies again late Saturday night.

What is the weekend temperature in Saint John?

Friday reaches 16 degrees. Saturday peaks at 19 degrees. Sunday sees a high of 17 degrees.

When does the rain start?

Showers begin Sunday night and continue throughout the day on Monday.

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