Climate Data for Latitude 38.75 Longitude -77.75

 

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Manassas National Battlefield Park

Averages (English) Metric

TypeUnitsJanFebMarAprMayJunJulAugSepOctNovDecPeriod
Min Temp25.326.434.142.852.761.966.564.857.946.036.528.1105 years
Mean Temp35.537.346.055.765.473.978.276.670.058.948.138.1109 years
Max Temp45.648.358.068.878.086.190.188.482.371.959.848.1109 years
FrostDays31.028.430.918.54.53.84.14.74.59.327.831.042 years
WetDays10.79.010.010.39.79.18.610.45.96.07.78.9109 years
Precipitationin2.82.53.33.23.93.93.84.03.33.12.92.9109 years
Potential Evapotranspirationin1.51.83.14.35.05.65.85.14.03.12.11.5109 years
Yearly Average Temperatures 1901 - 2009 (English) Latitude 38.75 Longitude -77.75
Monthly Mean Temperatures 1901 - 2009 (English) Latitude 38.75 Longitude -77.75
Yearly Total Frost Days 1903 - 2009 Latitude 38.75 Longitude -77.75
Yearly Total Precipitation 1901 - 2009 (English) Latitude 38.75 Longitude -77.75
Yearly Total Wet Days 1901 - 2009 Latitude 38.75 Longitude -77.75
Yearly Total Potential Evapotranspiration 1901 - 2009 (English) Latitude 38.75 Longitude -77.75

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.
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.