Vermont's Seasonal Temperatures: Summer Warmth, Winter Cold

Continental Climate Extremes

Vermont's northern New England location brings four distinct seasons with significant temperature swings:

Summer (June–August)

• Average: 21°C (70°F)
• Daytime highs often 27–30°C (80–86°F); occasional 32°C+ (90°F+) heat waves.
• Humid, with frequent afternoon thunderstorms.

Winter (December–February)

• Average: -7°C (20°F)
• Sub-zero (F) nights common; -18°C (0°F) or colder in northern mountains.
• Snow cover typically December–March; 150–300+ cm annual snowfall.

Regional Variation

• Champlain Valley (Burlington): Milder, less snow—lake moderation.
• Northeast Kingdom & Green Mountains: Coldest, snowiest, shortest growing season.
• Southern valleys: Slightly longer frost-free period.

Climate Change Notes

Winters warming faster than summers; growing season lengthening by ~2 weeks since 1970. More precipitation falling as rain vs. snow. Maple syrup season shifting earlier.