Climate Data for Latitude 39.75 Longitude -77.25

Köppen climate classification: Cfa (Climate: warm temperate; Precipitation: fully humid; Temperature: hot summer)


Catoctin Mountain Park
Gettysburg National Military Park

Averages (English) Metric

Min Temp22.422.930.939.850.158.563.361.554.643.133.925.7106 years
Mean Temp30.932.441.651.862.170.474.772.865.954.743.633.8109 years
Max Temp39.341.852.463.874.382.386.384.377.366.453.341.9109 years
FrostDays31.028.230.919. years
WetDays11.29.811.110.810. years
Precipitationin3. years
Potential Evapotranspirationin1. years
Yearly Average Temperatures 2010 - 2009 (English) Latitude 39.75 Longitude -77.25
Monthly Mean Temperatures 1901 - 2009 (English) Latitude 39.75 Longitude -77.25
Yearly Total Frost Days 1902 - 2009 Latitude 39.75 Longitude -77.25
Yearly Total Precipitation 1901 - 2009 (English) Latitude 39.75 Longitude -77.25
Yearly Total Wet Days 1901 - 2009 Latitude 39.75 Longitude -77.25
Yearly Total Potential Evapotranspiration 1901 - 2009 (English) Latitude 39.75 Longitude -77.25

Climate data provided by CRU TS 3.1 - University of East Anglia Climate Research Unit (CRU). [Phil Jones, Ian Harris]. CRU Time Series (TS) high resolution gridded datasets, [Internet]. NCAS British Atmospheric Data Centre, 2008, Accessed: 28-July-2011
Charting software provided by pChart - a PHP class to build charts.
Köppen climate classification provided by Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006: World Map of Köppen-Geiger Climate Classification updated. Meteorol. Z., 15, 259-263
The calculation method for the potential evapotranspiration is the FAO grass reference equation (Ekstrom et al., 2007, which is based on Allen et al., 1994). It is a variant of the Penman Monteith method using TMP, TMN, TMX, VAP, CLD.