United States Weather in May
Typical weather, rainfall, and packing tips for United States in May
United States · May
United States Weather in May
May weather in United States averages 17°C with 10 rain days and 62% humidity. Ideal sightseeing weather.
Typical Weather in United States in May
Based on 30-year historical averages.
Temperature
Conditions
What to Expect in May
- 1Daytime highs around 20°C, dropping to 13°C at night.
- 2Expect 10 rain days — rain is occasional.
- 3Humidity sits at 62% — comfortable.
- 48 hours of sunshine per day on average.
- 5UV index of 6 — moderate sun protection recommended.
What to Pack for United States in May
Best Activities for May Weather
Outdoor sightseeing
May is ideal for walking tours and outdoor attractions in United States.
Indoor attractions
Mix indoor and outdoor experiences for a balanced itinerary.
Food and culture
Spring seasonal dishes and local festivals make May culturally rich.
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Frequently Asked Questions
How we work this out
Temperature and rainfall figures are 30-year meteorological averages. Crowd levels come from national tourism arrival data. Price bands reflect mid-range accommodation and economy flights from major long-haul cities, sampled quarterly.
Last updated 18 July 2026 · Written by the Holicay travel team