Maryland State Climatologist Office

Climate Division 7 (Appalachian Mountains), Maryland
1895-2023

The following figures display the historical data for Climate Division 7 (Appalachian Mountains), Maryland from 1985 to 2023. The figures display time series of area-averaged surface air mean, maximum, minimum temperatures and total precipitation over the climate division at annual, seasonal and monthly resolutions with supperposed linear trends for the whole period (1895 - 2023) and for the 21st century period (2000-2023). A summary figure of the monthly trends for the whole period is inlcuded at the bottom. Climate Division 7 includes the counties of Allegany and Washington.

The figures are created from NCEI's NClimDiv data set, v1.0.0. Data labeled as scaled on December 9, 2024.

Climate Division 7 Temperatures (°F) & Total Precipitation (in)
1895-2023

Annual

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Seasonal

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Monthly

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Monthly Trends, 1895-2023

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Note:The thick black continuos line shows the 1895-2023 linear trend, and the thick red continuos line shows the 2000-2023 linear trend. The thin black line marks the 1895-2023 mean, while the dashed grey lines show the standard deviation (SD) above and below the mean. Trends that are statistically significant at the 95% level (Student’s t-test −Santer et al. 2000) are labeled with a black "s" in the time series and a white "s" in the bar graphs; no significat trends in the time series are labeled with a black "ns" while those in the bar graphs are not labeled.


References
  • Santer, B. D., and co-authors, 2000: Statistical significance of trends and trend differences in layeraveraged atmospheric temperature time series. J. Geophys. Res., 105, 7337–7356. DOI:10.1029/1999JD901105.
  • Vose, R. S., S. Applequist, M. Squires, I. Durre, M. J. Menne, C. N. Jr, Williams, C. Fenimore, K. Gleason, and D. Arndt, 2014. NOAA Monthly U.S. Climate Gridded Dataset (NClimGrid), Version 3. NOAA National Centers for Environmental Information. DOI:10.7289/V5SX6B56.