Schools typically close when temperatures drop below 20°F (-6°C) or when wind chill factors make conditions dangerously cold for students.
School closures due to extreme temperatures follow different guidelines across regions. While -20°F (-29°C) wind chill is common in northern states, southern districts may close for less severe cold. Heat-related closures typically occur above 95°F (35°C) with high humidity.
Temperature Thresholds for School Closures
Cold Weather Guidelines
Most northern U.S. districts use these benchmarks:
| Temperature/Wind Chill | Action |
|---|---|
| -15°F to -19°F (-26°C to -28°C) | Possible delays |
| -20°F to -24°F (-29°C to -31°C) | Likely closures |
| -25°F (-32°C) or below | Automatic closure |
Heat Closure Policies
Southern and coastal districts consider:
- 95°F (35°C) with 60%+ humidity
- 100°F (38°C) regardless of humidity
- Classroom temperatures exceeding 85°F (29°C)
Key Decision Factors
Regional Variations
Michigan districts like Lansing typically close at -20°F wind chills, while Ohio uses similar thresholds. Southern states may close for temperatures that northern schools consider normal winter weather.
Infrastructure Considerations
Schools evaluate:
- Bus functionality in extreme cold (diesel gelling risks)
- Heating system capacity
- Building insulation quality
Student Safety Factors
Districts assess:
- Average walk/bus stop times
- Percentage of students without proper winter gear
- Community shelter availability
Alternative Solutions During Closures
Some districts use smart heating solutions to maintain facility temperatures during extreme cold. For home use during closures, consider indoor propane heaters as backup heat sources.
Remote Learning Options
Many districts now implement:
- Virtual class days
- Asynchronous assignments
- Make-up days later in year
Special Cases
Universities vs. K-12
As noted in Michigan State University’s policy, higher education institutions rarely close completely. They maintain essential services for residential students.
Vocational Schools
Career-focused programs like Ohio’s Career Prep often use flexible scheduling to minimize disruption, as mentioned in their approach to weather challenges.
Parent Resources
The National Weather Service provides detailed wind chill charts showing frostbite risks. The CDC offers winter safety guidelines for families.
Most districts notify families by 5:30 AM through:
- Automated calls/texts
- District websites
- Local media alerts
