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When to go · Groton, Connecticut

Groton, Connecticut in May

Great month. Inside Groton, Connecticut's best window: May–Oct (museum open daily mid-May to mid-Oct).

Key facts

Verdict
Great
Temperature
19°C (66°F) / 9°C (48°F)
average high / low
Rain days
11
Crowds
Medium
United States overall
Prices
Medium
United States overall

Verdict

GreatBest and avoid months for Groton, Connecticut

Inside Groton, Connecticut's best window: May–Oct (museum open daily mid-May to mid-Oct).

Is another month better than May?

No other month rates higher than May for Groton, Connecticut in this guide.

Weather in May

Long-term averages
  • Groton, ConnecticutHighs around 19 °C (66 °F), lows around 9 °C (48 °F), rain on about 11 days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Memorial Day big impact

    Last Monday of May · United States

    Start of summer; roads and beaches full.

Crowds and prices

Crowds · United States overall
Medium
Prices · United States overall
Medium

United States overall: Warm and green; Memorial Day (last Monday) opens the summer season; timed-entry systems start at some parks.

Compare two months

Weather, crowds and prices for any two months in Groton, Connecticut, side by side.

  • Verdict

    May: Great

    Jun: Great

  • Daytime high

    May: 19 °C (66 °F)

    Jun: 24 °C (75 °F)

  • Night low

    May: 9 °C (48 °F)

    Jun: 14 °C (57 °F)

  • Rain days

    May: 11

    Jun: 10 (better)

  • Crowds

    May: Medium

    Jun: High

  • Prices

    May: Medium

    Jun: High

  • Festivals listed

    May: 1

    Jun: 0

May: Inside Groton, Connecticut's best window: May–Oct (museum open daily mid-May to mid-Oct).

June: Inside Groton, Connecticut's best window: May–Oct (museum open daily mid-May to mid-Oct).

Groton, Connecticut: figures are long-term averages from this guide, not a forecast.

What to pack

  • A warm layer for the evenings
  • A rain jacket or umbrella and shoes that dry fast

Build the full packing list for your trip →

Across United States in May →