Are There Black Widows in Minnesota?
No, Black Widows are not established in Minnesota. The state's extremely cold winters make it impossible for this spider to survive outdoors. While Black Widows are found across the southern and central United States, Minnesota's climate is far too harsh. Understanding where this spider actually lives helps ease worry about yard and garden work.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Northern Black Widow · Joseph McPhail CC BY
Western Black Widow · Rebecca Ray CC BY
Western Black Widow · Michael Eisen CC BY
- 4
- species recorded
- 9
- GBIF records
- September, June, July
- peak months
Black Widows are rare in Minnesota, so you might also want:
Real sighting data, source iNaturalist
Only 11 verified observations on iNaturalist of black widow have been logged in Minnesota, which fits how rare they are in the state. That low number is itself the most honest answer to whether you are likely to see one here.
No, Black Widows are not established in Minnesota. The state's extremely cold winters make it impossible for this spider to survive outdoors. While Black Widows are found across the southern and central United States, Minnesota's climate is far too harsh. Understanding where this spider actually lives helps ease worry about yard and garden work.
Are they in Minnesota?
Black Widows are not established anywhere in Minnesota. The state's extremely cold winters, with sustained temperatures well below freezing for months at a time, make it impossible for this heat-loving spider to survive outdoors year-round. Black Widows require warm conditions to complete their life cycle, and Minnesota does not provide those conditions. Minnesota winters are among the coldest in the continental United States. Temperatures regularly drop to 20, 30, or even 40 degrees below zero.Black Widows in Minnesotacannot survive these conditions. Black Widows are found in established populations only in the southern and central United States, including states like Maryland and Virginia.Minnesota wildliferemains free of this dangerous spider.
How dangerous is it?
A Black Widow bite is medically significant and requires attention, though deaths are extremely rare. The venom affects the nervous system and can cause severe muscle pain, cramping, and sweating. Symptoms typically begin within one to several hours after the bite. Most healthy adults experience painful symptoms that improve gradually over hours to days, especially with medical care. Very young children, elderly people, and those with heart disease or high blood pressure face higher risk of severe reactions. Severe symptoms may include intense muscle cramping, tremors, profuse sweating, nausea, and general illness. The bite itself is often painless, and many people do not realize they have been bitten until symptoms appear.Learn more about spider safety.
How to recognize one
Black Widows are small spiders, about the size of a pea in body length, not counting their legs. They are jet black or very dark brown with a shiny appearance. The most distinctive feature is a bright red or orange hourglass marking on the underside of the abdomen. Some individuals also display red spots on the upper surface of the abdomen. The female is noticeably larger than the male. These spiders spin tangled webs in dark, undisturbed places such as woodpiles, leaf litter, dense vegetation, and corners of garages or sheds. They are sedentary spiders that remain in one location rather than actively hunting prey across open ground.Visit our wildlife guideto learn about safe spider identification.
What to do if you are bitten or stung
Stay calm and do not panic. Wash the bitten area gently with soap and water. Remove any tight jewelry, rings, or bracelets from the area, as mild swelling can occur. Sit or lie down and keep the bitten limb as still as possible. Elevate the affected limb if you can. Do not apply a tourniquet or tie any tight bandage around the limb to restrict blood flow. Do not cut, squeeze, or attempt to suck out venom. Do not apply ice directly to the skin, though a cool cloth may help ease discomfort. Seek medical attention immediately, even if symptoms seem mild, so doctors can monitor your condition. Contact Poison Control for guidance on next steps. If you experience chest pain, severe shortness of breath, or other severe symptoms, call 911. This is general information, not medical advice; if you are bitten, call Poison Control at 1-800-222-1222, or 911 if symptoms are severe.
How to prevent encounters
Standard spider safety practices are recommended for all Minnesota residents. While Black Widows do not live in Minnesota, these practices improve overall yard safety and pest management year-round. Wear work gloves when handling items stored in basements, crawl spaces, and garages. Shake out clothing, shoes, and bedding before putting them on or using them, which is good practice against all household pests. When gardening, wear closed-toe shoes and gloves. Clear away dead wood, leaf piles, and dense brush from around your home and yard. Keep your basement, garage, and storage areas well organized and clutter-free. Store items in sealed containers or on shelves rather than directly on the floor. Inspect patio furniture and outdoor equipment before bringing it indoors.Find more Minnesota wildlife safety information.
Where in Minnesota and when
Black Widows do not occur naturally anywhere in Minnesota. They are not found in the Twin Cities area, throughout Minnesota's forests and prairies, in the northern regions near Lake Superior, or anywhere else in the state. Minnesota's entire climate is unsuitable for year-round Black Widow survival. The winters are simply too long and too cold. Even during Minnesota's brief, intense summer heat waves, when the state may experience temperatures in the 90s or occasionally over 100 degrees, these warm periods do not last long enough for Black Widows to establish populations. Fall arrives within weeks, temperatures drop rapidly back toward freezing, and winter returns. Black Widows need sustained warm weather for months to complete their breeding cycle. Minnesota remains free of this spider throughout the entire year.
Harmless lookalikes
The spiders found throughout Minnesota are almost entirely harmless species native to the Upper Midwest. Cellar spiders have very long, thin legs and small bodies. They are completely harmless and help control pest insects indoors and outdoors. Wolf spiders are common in Minnesota yards and are brown with excellent eyesight and active hunting behavior. Jumping spiders are small, fuzzy, and remarkably intelligent, with excellent vision. Ground spiders, sheet web spiders, and orb weavers are all common Minnesota species and are harmless. Fishing spiders live near Minnesota's many lakes, rivers, and wetlands and are sometimes mistaken for dangerous spiders but are harmless. Cobweb spiders are found in homes and buildings everywhere. If you find any spider in Minnesota, it is almost certainly one of these common harmless species.
Frequently Asked Questions
Are Black Widows deadly in Minnesota? Black Widows are not found in Minnesota, so this is not a real concern for residents. Hypothetically, a Black Widow bite can be serious but is extremely rarely fatal with modern medical care. Are Black Widow bites common in Minnesota? Black Widow bites do not occur in Minnesota because the spider does not live here. The risk is zero for wild spiders in Minnesota. What should I do if I find a spider I think might be a Black Widow? Take a clear photograph and contact your local wildlife authority, Minnesota Department of Natural Resources, or a county extension office for identification.Check our wildlife guidefor help identifying Minnesota spiders safely.
Plan your trip
Best time to see black widow in Minnesota: September, June, July
See the month-by-month sighting calendar.
Plan your black widow sighting in Minnesota
9 verified black widow records have been logged in Minnesota, most recently in 2025. See the GBIF records.
Where to look in Minnesota
- Grand Portage National Monument · Wildlife Watching, Birdwatching · Find hotels
- Mississippi National River & Recreation Area · Wildlife Watching, Birdwatching · Find hotels
- North Country National Scenic Trail · Wildlife Watching, Birdwatching · Find hotels
- Pipestone National Monument · Wildlife Watching, Birdwatching · Find hotels
- Saint Croix National Scenic Riverway · Wildlife Watching, Birdwatching · Find hotels
- Voyageurs National Park · Wildlife Watching, Birdwatching · Find hotels
Frequently asked questions
Are they in Minnesota?+
Black Widows are not established anywhere in Minnesota. The state's extremely cold winters, with sustained temperatures well below freezing for months at a time, make it impossible for this heat-loving spider to survive outdoors year-round. Black Widows require warm conditions to complete their life cycle, and Minnesota does not provide those conditions. Minnesota winters are among the coldest in the continental United States. Temperatures regularly drop to 20, 30, or even 40 degrees below zero.Black Widows in Minnesotacannot survive these conditions. Black Widows are found in established populations only in the southern and central United States, including states like Maryland and Virginia.Minnesota wildliferemains free of this dangerous spider.
How dangerous is it?+
A Black Widow bite is medically significant and requires attention, though deaths are extremely rare. The venom affects the nervous system and can cause severe muscle pain, cramping, and sweating. Symptoms typically begin within one to several hours after the bite. Most healthy adults experience painful symptoms that improve gradually over hours to days, especially with medical care. Very young children, elderly people, and those with heart disease or high blood pressure face higher risk of severe reactions. Severe symptoms may include intense muscle cramping, tremors, profuse sweating, nausea, and general illness. The bite itself is often painless, and many people do not realize they have been bitten until symptoms appear.Learn more about spider safety.
More wildlife in Minnesota