Climate Data for Latitude 38.75 Longitude -77.25

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

Locations

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Chesapeake & Ohio Canal National Hist. Park
George Washington Memorial Parkway
National Capital Parks - Central
Prince William Forest Park
Rock Creek Park
Thomas Stone National Historic Site

Averages (English) Metric

TypeUnitsJanFebMarAprMayJunJulAugSepOctNovDecPeriod
Min TempF°26.627.235.444.154.263.968.767.259.947.637.829.5107 years
Mean TempF°35.837.246.155.765.474.478.977.270.459.048.238.5109 years
Max TempF°45.047.257.067.476.785.089.287.481.070.458.847.6109 years
FrostDays31.028.329.714.54.03.03.57.24.75.327.031.029 years
WetDays10.08.79.69.89.39.08.510.35.75.87.28.2109 years
Precipitationin3.12.63.63.43.93.84.04.23.53.12.93.1109 years
Potential Evapotranspirationin1.61.83.14.25.05.65.95.34.03.02.11.6109 years
Yearly Average Temperatures 2010 - 2009 (English) Latitude 38.75 Longitude -77.25
Monthly Mean Temperatures 1901 - 2009 (English) Latitude 38.75 Longitude -77.25
Yearly Total Frost Days 1902 - 2009 Latitude 38.75 Longitude -77.25
Yearly Total Precipitation 1901 - 2009 (English) Latitude 38.75 Longitude -77.25
Yearly Total Wet Days 1901 - 2009 Latitude 38.75 Longitude -77.25
Yearly Total Potential Evapotranspiration 1901 - 2009 (English) Latitude 38.75 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.