Cold Temps Return to Maryland, But Not Unusual

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Temperatures in Maryland are expected to drop below freezing tonight, but this is not an unusual occurrence for this time of year. The average last freeze date in Baltimore is April 11, and freezing temperatures have been recorded as late as May 11 in the past. While frost can form even when temperatures are above 32 degrees a few feet off the ground, the weather is expected to warm up significantly by next week.

Why it matters

Knowing the typical last freeze dates for an area is important for gardeners and homeowners who want to safely plant temperature-sensitive plants without risking damage from late-season frost. This information helps them time their plantings appropriately.

The details

According to meteorologist Tony Pann, the average date for the last freeze in Baltimore is April 11. However, freezing temperatures have been recorded as late as May 11 in the past, and temperatures as low as 38 degrees have resulted in ground frost even when the air temperature was above freezing a few feet off the ground. Pann advises waiting until at least the first week of May before planting sensitive plants outside to ensure they are not damaged by late-season cold snaps.

• The average last freeze date in Baltimore is April 11.
• Freezing temperatures have been recorded as late as May 11 in the past.
• Temperatures as low as 38 degrees have resulted in ground frost, even when the air temperature was above freezing a few feet off the ground.

What’s next

The weather is expected to warm up significantly by next week, with a 'big push of warm air coming up the East Coast' by April 14, according to the forecast.