Free past weather lookup: see past weather history, temperature, rain and snow conditions on any date — for any city, US ZIP code, NYC, Chicago or Delhi. Data back to 1940. Weather Underground provides local & long-range weather forecasts, weather reports, maps & tropical weather conditions for the Seattle area. Monthly weather averages for Seattle, United States: average temperatures and rainfall by month, a climate graph, today versus the long-term average, and how the climate has changed. Look up past weather for any city, ZIP code, or airport code. Weather Underground provides historical weather reports, temperatures, precipitation and daily observations for locations worldwide. Use the search bar to enter a location of interest (name, address, zip code, etc.). Or, use the map to find a location by using zoom/pan or Shift+Click+Drag and then click Search this area . A set of stations from that location will be displayed (if any exist). Seattle past weather data including previous temperature, barometric pressure, humidity, dew point, rain total, and wind conditions. seattle past weather data including previous temperature, barometric pressure, humidity, dew point, rain total, and wind conditions. High & Low Weather Summary for the Past Weeks. Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals. Weather observations for the past three days for Seattle, Seattle-Tacoma International Airport Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals. More about our weather records.