Post #4: Yearly Averages

In the previous blog, graphs of the monthly averages for temperature and precipitation for Portland were shown. This entry includes yearly averages of the high and low temperatures as well as the average temperature and annual precipitation.

The data shown covers from 1941 to 2012. The original data had high and low temperatures as well as the precipitation recorded as daily values. The average of all of these values was taken to derive the yearly average for the temperatures. For precipitation, all of the values were added together to derive the annual value. It should be noted that the original data also had partial data for the year 1940 and 2013. Because this data was only partial, it was excluded from the yearly average because the results were unreasonable outliers.

Original data from:
National Weather Service Forecast Office. "Portland, OR." 7 Mar., 2013. Web. 25 Mar.,2014. http://www.nws.noaa.gov/climate/local_data.php?wfo=PQR

Post #3: Monthly Weather

Portland, Oregon is classified as Cfc/Cfb in the Koeppen System. This is the mild mid-latitude classification and more specifically the marine climate. This climate has wet winters, with only slight chances of freezing, followed by extremely humid, hot summers that are generally very short. The factors that make Portland part of this system are due to location.

The mid-latitude cyclones that are present during much of the year are the cause of much of the weather that Portland receives. The other major factor that affects winds and temperature is the relative proximity to the ocean. Because Portland is close to the ocean, the sea breezes help to keep the winter mild and the summers cooler. The proximity to the ocean also allows for more precipitation in the area. The climate Portland has fits the classification of C.

A graph of the overall average of the Cfc/Cfb precipitation and the temperature is shown below. As well as related graphs for Portland, Oregon.

 Graph of C averages and information:

Pidwirny, Michael. “Moist Mid-latitude Climates with Mild Winters-C Climate Type.” 25 Mar.,   2011. Web. 13 Mar., 2014. http://www.eoearth.org/view/article/162272/

 

Graphs for Portland derived from information from:

“Monthly Weather for Portland.” The Weather Channel. 2012. Web. 13 Mar., 2014. http://www.weather.com/weather/wxclimatology/monthly/graph/USOR0275