San Antonio's Last Freeze Typically Arrives in Late February

Urban heat effects mean areas within Loop 410 may experience earlier last freezes.

Feb. 4, 2026 at 2:15pm

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San Antonio's average last freeze typically occurs around February 23, but the timing can vary depending on location. Areas within Loop 410 tend to see earlier last freezes due to the urban heat island effect, while outlying areas often experience freezes later into spring.

Why it matters

Knowing when the last freeze typically arrives is important for gardeners and homeowners planning spring planting and outdoor activities. The urban heat island effect means some San Antonio residents may need to be more vigilant about potential late-season freezes compared to others.

The details

While late February is the average last freeze date for San Antonio, freezing temperatures have been recorded as late as early April in the past. The latest freeze on record was on April 3, 1987. Residents in areas outside the city center should be prepared for the possibility of freezes well into March.

  • San Antonio's average last freeze occurs on February 23.
  • The latest last freeze on record for San Antonio was on April 3, 1987.

The players

San Antonio

The city of San Antonio, Texas.

Loop 410

The highway loop that surrounds the central part of San Antonio, with areas inside the loop experiencing earlier last freezes due to the urban heat island effect.

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The takeaway

Residents of San Antonio should be aware that the timing of the last freeze can vary significantly depending on their location within the city, with areas inside Loop 410 typically seeing earlier last freezes than outlying areas. This is an important consideration for gardeners and homeowners planning spring activities.