Weather

http://www.wunderground.com/history/
Historic global weather conditions, so you can find out if it really was a dark and storm night.

http://countrystudies.us/united-states/weather/
Average temperatures and rainfall in US cities.

http://www.weather.com/
The weather Channel.

Setting the Scene with Weather
An article about the role of weather in fiction from Writing-world.com

Weather in Fiction
By Karen Pon.