Citygo.info
Includes the weather in Paris at present, as well as a forecast for the next seven days.
http://parisweb.info/paris/weather/weather.php

Free-Weather.com
The average temperature, wind speed and humidity throughout the year in Paris presented in graphical form.
http://www.free-weather.com/Paris-France.php?nav=

Holiday Inn
Find out more about the amount sunshine and rain the city normally receives.
http://paris-republique.holiday-inn.com/location/climate.html

Met Office
Check out the weather in Paris over the next few days.
http://www.met-office.gov.uk/worldcity/paris.html

Meteo France
Website of the French national weather agency. In French only.
http://www.meteofrance.com/

Paris Tourist Office
Air quality reports for the Paris region.
http://www.paris-touristoffice.com/va2/partenaires/airparif_va.html

Parisby.com
Weather averages for the city.
http://www.parisby.com/weather/weather.htm

Parisinfo.com
Air quality and weather information.
http://www.parisinfo.com/guide_paris/rub6002.html

USA Today
Weather averages and up-to-date forecasts for Paris.
http://www.usatoday.com/weather/resources/climate/wparis.htm

Yahoo.com
An overview of the climate in Paris.
http://travel.yahoo.com/p-travelguide-519434-paris_climate-i