The Weather In Cleveland
[Cleveland's weather in May](http://www.cleveland.com/datacentral/index.ssf/2014/05/what_is_typical_may_weather_in.html) can vary anywhere between 50 degrees Fahrenheit to 90 degrees Fahrenheit. You won't have to pack for any snow (knock on wood!) but be prepared to pack clothes for weather near 60 Fahrenheit/15 Celsius.
Once the date of PyCon is close, you can learn more by consulting the <a href="http://forecast.weather.gov/MapClick.php?lat=41.5047&lon=-81.6907">official 7-day forecast</a> from the National Weather Service.
Keep in mind that conference room temperatures tend to fluctuate. Please wear clothes in layers, to ensure you are comfortable at all times. It can rain in spring time, so you might want to pack a light rain coat or umbrella.