Science, Tech, Math › Science Weather Folklore: Mother Nature's Winter Predictions Share Flipboard Email Print Science Weather & Climate Understanding Your Forecast Storms & Other Phenomena Chemistry Biology Physics Geology Astronomy By Tiffany Means Meteorology Expert B.S., Atmospheric Sciences and Meteorology, University of North Carolina Tiffany Means is a meteorologist and member of the American Meteorological Society who has worked for CNN, the National Oceanic and Atmospheric Administration, and more. our editorial process Tiffany Means Updated January 14, 2020 Every season, as the summer sun fades and autumn nears, it's inevitable to wonder what kind of winter this coming year will this bring? Official winter outlooks are typically released in October, but if this is simply too long to wait, why not head outside and put the power of forecasting into your own hands with the aid of weather folklore. "The Farmers’ Almanac" has preserved much old-time weather folklore. These traditional approaches to weather forecasting suggest that it's possible to predict the coming winter as early as August and September by observing certain plants, animals, and insects' behavior. August Weather Alexander Krivtsov / EyeEm / Getty Images A significant amount of winter lore has to do with observing weather conditions during the month of August. (Perhaps because it's the transition point between the last summer and first fall months?) For every day of fog in August, there will be a snowfall.If the first week in August is unusually warm, the coming winter will be snowy and long.If a cold August follows a hot July, it foretells a winter hard and dry. (Yes, the rhyme is part of the saying.) Acorn 'Drops' CBCK-Christine / Getty Images Have an oak tree near your house? Noticed the ground of your yard, driveway, or porch overrun with acorns? If so, folklore predicts that these same surfaces may be blanketed by snow this winter. Not only the acorn, but its connoisseur, the squirrel, is also linked to winter weather. If squirrels are more active than usual, it's considered an indication that a severe winter is on its way. And its no wonder why. During the autumn and winter season, a squirrel's main task is gathering nuts and seeds for its storehouse, so if its efforts have noticeably increased, it could only mean he's preparing for the worst. As the saying goes: "Squirrels gathering nuts in a flurry,Will cause snow to gather in a hurry." Persimmon Seeds Photo by Cathy Scola / Getty Images Available October through February, this fruit has more than just culinary uses. A persimmon's seeds are thought to foretell the type of winter expected. Carefully cut the seeds open lengthwise. What do you see inside? A spoon-shaped pattern is said to represent a shovel for all of the heavy, wet snow to come.A knife signals a cold, icy winter with cutting winds.If a fork is visible, it means that a generally mild winter with only light powdery snow can be expected. While it makes no difference if the persimmon is picked or purchased, it must be locally grown—otherwise, you'll be getting results for a region other than your own. A tough winter is also said to be ahead if: Onions or cornhusks have thicker than normal skinsLeaves fall from the trees late in the year Woolly Bear Caterpillars Stan Osolinski / Getty Images The larvae of Isabella tiger moths—more commonly known as woolly worms, or woolly bear caterpillars—are easily recognized by their short, stiff bristles of reddish-brown and black hair. According to legend, the width of the middle brown band foretells the severity of the upcoming winter. If the brown band is narrow, the winter will be cold and long. However, if the band is wide, then the winter will be a mild and short one. Some consider the woolly's hair thickness to be another indicator, with a thicker coat signaling harsher, and sparse hairs a milder winter season. (What's more, the woolly has exactly 13 segments to the length of his body—the same number of weeks there are of winter.) The woolly worm's talent was first discovered in the late 1940s by Dr. Charles Curran, former curator of insects at New York City’s Museum of Natural History. By observing caterpillar markings and comparing these to winter weather forecasts (provided by a reporter at the New York Herald Tribune), Curran found that the width of reddish-brown hair correctly matched the winter type with 80% accuracy. Since then, researchers haven't been able to replicate Dr. Curran's success (coloration is said to have less to do with weather and more to do with a caterpillar's development stage and genetics), but this inconvenient fact hasn't seemed to influence the woolly worm's popularity. In fact, annual festivals are held in its honor in the cities of Banner Elk, NC, Beattyville, KY, Vermilion, OH, and Lewisburg, PA. Other insect behavior that is linked to weather includes: Ants marching single file (as opposed to meandering)Crickets (and other creatures) taking up residence inside your houseBees building nests high in the treesSpiders spinning larger-than-usual webs Halos in the Sky Martin Ruegner / Getty Images Once winter finally does arrive, use this rhyming proverb to predict approaching snowstorms: "Halo around the sun or moon,Rain or snow soon." Halos are caused by sunlight and moonlight refracting off of ice crystals in cirrus clouds (the cloud type that precedes an approaching warm front). Seeing high-level moisture is a good sign that moisture will soon also be moving in at increasingly lower levels. So the association between a halo and rain or snow is one bit of folklore that rings scientifically true.