St. Swithin's Day

{
  "id": "MLC-T-MET-009170",
  "term": "St. Swithin's Day",
  "field": "Meteorology and atmospheric science",
  "definition": "A traditional weather lore day, observed on July 15th, which suggests that the weather pattern on this specific day will persist for the following 40 days. If it rains on St. Swithin's Day, the belief is that rain will continue for 40 days; if it is fair, then 40 days of fair weather will follow. This folklore has no scientific basis in meteorology.",
  "see_also": [
    "control day"
  ],
  "url": "https://mlchart.com/terminology/meteorology/st-swithin-s-day/"
}