Missouri 7-Day Forecast: Highs Climb From 72°F to Mid-80s Through Memorial Day Week

What changed

The National Weather Service forecast for central Missouri shows a clear warm-up trend heading into Memorial Day week:

• Thursday night into Friday morning (May 22): Overnight low near 58°F.
• Friday (May 22): High of 72°F.
• Friday night: Low dropping to 55°F.
• Memorial Day (May 25): High reaching 85°F — the warmest day in the forecast window.
• Thursday (May 28): High of 84°F, keeping the week solidly in the 80s.

That's a 13-degree swing in daytime highs over the course of about a week.

Why it matters

For corn that's already in the ground, daytime highs in the low-to-mid 80s paired with lows in the 50s add up to growing degree days (GDDs) that could push emergence and early leaf stages along at a good clip. Soybeans planted in mid-May could also benefit from the warmth for germination and stand establishment.

Keep in mind this forecast is based on a single NWS grid point (LSX/26,70 — roughly central Missouri). Conditions across the state will vary, especially in northern and southeastern Missouri. Check your local NWS office forecast for field-level detail.

What to watch next

• Rainfall: Warm temps without moisture can stress newly emerged seedlings. Watch for updated precipitation forecasts through the week.
• Overnight lows: The 55–58°F range early in the period is comfortable, but any dip toward the upper 40s in northern Missouri could slow things down. Worth watching local forecasts.
• Extended outlook: Whether the 80s hold or retreat after May 28 could affect how quickly GDDs accumulate through early June.

Source notes

All temperature data from the U.S. National Weather Service API (NWS grid point LSX/26,70). Forecast periods cover May 22–28, 2026.