Historical Weather Context
How today and this month compare to official NOAA/NCEI 1991-2020 climate normals near Montgomery County, Maryland — sourced from the nearest long-record climate station, with clear methodology and sourcing.
What this page provides
How today and this month compare to official NOAA/NCEI 1991-2020 climate normals near Montgomery County, Maryland — sourced from the nearest long-record climate station, with clear methodology and sourcing.
Information available
- Compares yesterday's actual high, low, and rainfall to the official NOAA/NCEI 1991-2020 daily climate normal.
- Tracks this month's temperature and rainfall against the sum of official daily normals for the days elapsed so far.
- Reports this month's warmest day, coldest day, wettest day, and heavy-rain-day count from real observations.
- Sourced from Washington Dulles International Airport, the nearest station with a complete official normals record.
- Historical context only — never a forecast, and never a substitute for official NWS alerts or drought/flood status.
Sources and freshness
- Source details and update times are identified on the page and in the MoCo.Now Data Sources directory.
This is a build-time overview. Live observations, publication dates, and refresh times appear in the interactive page. Review the complete data source directory.