BBC Weather Centre - Country Guides: Iran: Provides climate and weather information, facts and statistics about the country, along with five-day forecasts for major cities.
I.R. of Iran Meteorological Organization: Government agency provides forecasts and information on weather, climate, air quality and the environment. [English, Farsi]
Iran Meteorological Organization: In depth coverage of weather, climate and environment of Iran.
NOAA NWS - Iran Weather: US government site provides hour-by-hour weather conditions for the past 24 hours for major cities and locations in the country.
The Climate of Iran: Describes the climate of the northern, southern, desert and mountainous regions of Iran. Article by Parviz Kardovani, professor of geography at the University of Tehran.
Weather Underground - Iran: Displays current conditions for all major cities on one page, with five-day forecast and more detailed information for each available.
Weather.com - Iran: City-by-city weather reports and forecasts.
WeatherHub - Iran: Links to forecasts for cities and airports from various weather sources.
World Weather Information Service - Islamic Republic of Iran: UN weather agency's month-by-month temperature and precipitation information for cities in Iran.