Hello Linda,

Frost Dates for 2026 in ZIP Code 48348 (Clarkston, Michigan)

A search of .edu sources does not provide frost‑date projections for ZIP 48348 in 2026. Michigan State University’s Extension resources publish historical frost‑free tables, but they do not break them down by ZIP code or provide future‑year forecasts. The closest available data are regional averages for nearby Michigan stations.

More information at this link:

Frost-Free Dates - Gardening in Michigan

What the available .edu data tells us

MSU’s frost‑free tables list the average last spring frost and the average first fall frost for many Michigan locations. While none correspond exactly to 48348, the nearest comparable stations (e.g., Ann Arbor, Bay City, Big Rapids) show:

Nearby Station, Avg. Last Spring 32°F, Avg. First Fall 32°F

Ann Arbor, ~April 29 – May 6, ~May 27 (late frost)

Bay City, ~May 2 – May 9, ~May 26 (late frost)

Big Rapids, ~May 20 – May 26, ~June 12 (late frost)

More information at this link:

Frost-Free Dates - Gardening in Michigan

ZIP 48348 lies in southeast Michigan, so its frost pattern is typically closest to Ann Arbor / Oakland County averages, meaning:

Estimated 2026 Frost Dates for 48348 (based on regional climatology)

These are climatological estimates, not 2026‑specific forecasts:

Last Spring Frost (32°F): Late April to early May (typically April 25 – May 5)

First Fall Frost (32°F): Late September to early October

Why do no exact 2026 dates exist

Universities and climate centers (including MSU and MRCC) publish historical averages, not year‑specific frost predictions. The MRCC Freeze Date Tool provides county‑level climatology but does not project future dates.

More information is at this link:

MRCC - freezedatetoolabout

I hope this helps!