Hectic schedules, vacations, allergies, and warmer weather are the cause for more stress and less sleep for some during the summer months, according to a new survey by SleepRate, a company that offers sleep improvement plans based on methods from the Stanford Sleep Clinic via a smartphone app. The first day of summer is Saturday, June 21, and one-third of Americans are starting to feel stressed, the survey finds.

Other survey findings include:

  • 87.5% of respondents prefer to sleep in cooler temperatures; 12.5% of respondents prefer to sleep in warmer temperatures
  • 57.5% of respondents sleep about the same amount during the summer months compared with the rest of the year; 32.8% sleep less; 10.2% sleep more
  • 51.5% of respondents say summer doesn’t affect their sleep; 27% say it affects their sleep because they can’t sleep in warmer weather; 7.9% say summer affects their sleep due to allergies; 3.6% say summer affects their sleep due added stress (the remaining 10.5% responded none/other)