When Is Sweet Corn in Season?
Sweet Corn season by U.S. region
| Region | Typical window | Source |
|---|---|---|
| Georgia | June–August | UGA Extension |
| Florida | Zone-dependent; warm-season plantings March–April & August | USDA NASS / UF-IFAS |
| Texas / South-Central | Summer + fall | ACL regional list |
| California | May–October | UC ANR |
| Northeast | Summer + fall | ACL regional list |
| Midwest (Great Lakes) | Summer + fall | ACL regional list |
| Pacific Northwest | Summer | ACL regional list |
Where a source publishes only season-level timing ("summer + fall"), we show exactly that — regional month precision exists only where an extension calendar provides it. Weather moves every window; your market's growers are the final word.
How the season moves across the country
Corn follows the standard south-first pattern — Georgia's June opening leads the Northeast and Midwest by several weeks, and California's long May–October run brackets everyone — but the compressed national peak is the same two months: July and August. That's when roadside "corn's in" signs go up in nearly every state at once.
The national peak for sweet corn — like every warm-season market crop — is July–August. See what's in season right now for the current month's full national list, or your state's harvest calendar for local timing.
How to pick sweet corn at the market
Purdue Extension's market advice is simple: sweet corn loses sugar rapidly after harvest, so always ask when it was picked — and taste a kernel if the farm allows it. Corn is harvested immature (that's what keeps it tender), which is why same-day corn from a market beats week-old supermarket corn by such a wide margin.
Storing sweet corn once you're home
Refrigerate immediately, out of direct sunlight, and eat within 1–3 days for peak flavor (Purdue Extension). Commercial handlers hold sweet corn at 32°F — the cold end of the two-cooler rule — precisely because warmth burns through its sugar. Rinse before cooking, and refrigerate cooked or cut corn within 2 hours (USDA NIFA).
The storage science, in four rules
- Warm-season vegetables have a chilling-injury danger zone of 45–55°F — cucumbers and summer squash are highly sensitive; snap beans, muskmelon, and tomatoes moderately so (University of Tennessee Extension).
- Commercial growers use a two-cooler rule: 32°F for sweet corn and ripe muskmelon; 50°F for green beans, cucumbers, summer squash, ripe tomatoes, and watermelon.
- Cantaloupe, peaches, and tomatoes produce ethylene as they ripen; snap beans, cucumbers, and summer squash are damaged by it — store the two groups apart.
- Cut, peeled, or cooked produce must be refrigerated within 2 hours, and melon rinds should be rinsed before cutting so the knife doesn't carry surface bacteria into the flesh (USDA NIFA).
Frequently asked questions
When is sweet corn in season?
July and August are the national peak. Georgia harvests June–August, California May–October, and the Northeast, Midwest, and Pacific Northwest all run through the summer months — check your state's calendar for the local start.
How do I pick good sweet corn at the market?
Ask when it was picked — that's the whole game. Sweet corn loses sugar rapidly after harvest per Purdue Extension, so same-day corn is the prize. If the farm allows, taste a raw kernel; it should be sweet and milky.
How long does sweet corn keep?
1–3 days in the fridge for best flavor, per Purdue Extension — and every hour at room temperature costs you sweetness. Commercial handlers store it at 32°F for exactly that reason. Buy it last at the market, refrigerate it first at home.
Where to buy sweet corn in season
The freshest route is direct: find a farmers market near you, browse farm stands and u-pick farms by state, or search by ZIP with the market finder. In-season, direct-from-farm sweet corn were usually picked within a day of the table.
Know what's in season before you shop
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→ What's in season right now · Month-by-month calendar · Season Finder tool
More produce guides: Tomatoes · Watermelon · Peaches · Cantaloupe · Cucumbers · Summer Squash · Green Beans
Unusual finds at the market: Pawpaw · Ground Cherry · Purslane
Sources
- UGA Extension — Georgia's Month-by-Month Produce Guide
- UC ANR — California Harvest Calendar
- Administration for Community Living — Seasonal Produce Chart by Region
- UF/IFAS — Florida Vegetable Gardening Guide (VH021)
- Purdue Extension — Shopping Tips for Indiana Farmers' Markets
- University of Tennessee Extension — Postharvest Handling (Getting the Most Out of Your Crops)
- USDA NIFA — Guide to Washing Fresh Produce
Harvest windows are typical ranges from state Cooperative Extension calendars and USDA regional sources — not forecasts. Weather shifts every season by weeks; confirm locally at your market.