Missouri Weather Snapshot: 64°F at St. Louis on May 22, 2026

What changed

This is a single-station snapshot, not a trend report. Here are the numbers from the latest KSTL observation:

• Temperature: 64°F (18°C, converted from the NWS-reported degrees Celsius)
• Dew point: 55°F (13°C)
• Wind speed: About 8 mph (roughly 13 km/h, converted from the NWS-reported km/h)
• Barometric pressure: About 30.01 inches of mercury (101,626 Pa)

The spread between temperature and dew point — about 9°F — points to moderate humidity, not unusual for late May in Missouri.

Why it matters

Mid-60s with moderate humidity and light wind is comfortable working weather. For corn and soybean fields across Missouri, these conditions don't flag any immediate stress. Soil moisture and growing-degree-day accumulation are the bigger-picture items to track as the season moves forward, and local conditions across the state will vary from this single St. Louis reading.

What to watch next

• Forecast trends: Check your local NWS forecast office for multi-day outlooks — a single observation is just one moment in time.
• Dew point changes: Rising dew points later in the week could signal incoming moisture or storm potential. Worth watching.
• Growing degree days: If you're tracking GDD accumulation for corn staging, local temperature data from your nearest station may matter more than a St. Louis reading.

Source notes

All four data points come from the U.S. National Weather Service API, KSTL station observation at 2026-05-22T06:15:00 UTC. Temperature was reported in °C (18°C → 64°F). Dew point was reported in °C (13°C → 55°F). Wind speed was reported in km/h (about 13 km/h → about 8 mph). Pressure was reported in Pascals (101,626 Pa → about 30.01 in Hg).