Millersville & Lancaster Area Climatology

• This Month's Data: Millersville University
• MU's current monthly "Climogram"
• MU's current monthly "Precipogram"
• MU's year-to-date temps (plotted weekly)
• Yesterday's Climo: Harrisburg, Williamsport, State College
• Yesterday's Statewide: High/low/precip
• 3 Day Weather Observation History: Lancaster Airport
• NWS monthly summary interface: PHI | CTP | PIT
• NWS Co-Op Archive (NOWData): CTP | PHI | PIT | CLE | BGM

• Monthly Summaries: MU/Lancaster (since 1914)
• Climograms: MU/Lancaster (since 1914)
• Precipograms: MU/Lancaster (since 1914)
• Hourly Data: MU Weather Station (5/98 - Present)
• Meteograms: 24-hour Data Plots (3/10 - Present)
• Search for past METAR (hourly) reports
• Monthly Temp. Departures (Using 1914-2020 Normals): 1914-2023
• Monthly Precip. & Departures (Using 1914-2020 Normals): 1914-2023
• Monthly Precip. Most- and Least-Ever
• Mean Monthly Data: High/Low/Precip/Degree Days

• Daily Sun and Moon Data
• NOAA Sunrise/Sunset Calculator
• NOAA Solar Position Calculator
• Local Wind Rose (MDT) Avg. Speed & Direction
• PA Tornados (1950-2015): Plot of Tracks | Lancaster-Lebanon tornado plots (abridged) | Lower SusQ tornado plots (abridged) 
• U.S. Tornadoes: SPC Tornado Archive (since 1950) | Tornado Tracks/Intensity by State
• Historical Temperature and Rainfall Statistics: Major PA Cities | Statewide (PA)
• A Severe Weather Database (SPC)
• Radar image archive
• Historical SST Anomalies (since 1996)
• Daily Map Archive
• For Comprehensive Climatological Data go to National Climatic Data Center

• PSL Climate Division Data (since 1895) | Monthly/Seasonal Climate Composites (since 1948)
• NCEI Regional Climate Centers 
• Winter Storm Archive (1993-2013)
• NCEP National Temp. and Precip. Maps (since 2001)
• List of 66 NESIS Snowstorms
• Historical NAO Index by Month (since 1950)
• Historical AO Index by Month (since 1950)
• Historical PNA Index by Month (since 1950)
• CIPS Analog Threat Guidance
• Climate Predict Teleconnection Analogs (since 1948)

• Normals & Records: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
• Extremes by Month and Day (PDF file): Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
• Normal Year-to-date Precip: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
• Normal Highs/Lows: Graph

• Seasonal Snowfall: 1926 - 2023 | graph
• Decadal Snowfall: graph
• Monthly Snowfall: ~90-year Average
• Snowstorms (date & amount) by Decade: 1920/30s | 40s | 50s | 60s | 70s | 80s | 90s | 00s | 10s | 20s
• All measurable snowfalls since 1926
• First & last freezes (1914-2021): Graph | Graph w/Trendline 
• List of all 24-hour Precip. Events =>2 inches (1914-2003)
• 24-hour Precip. Events => 2 inches by MONTH (1914-2003)
• 24-hour Precip. Events => 1 inch by MONTH (1914-2003)

• PA DEP: Current Drought Status
• Local Obs: Stream Flow | Well Depth to Water | Drought Streamflow Probabilities (Northeast US)
• Lancaster: Moving 120-day Precip & Drought Criteria
• USGS Water Monitoring: Home Page | Groundwater | Interactive PA Streamflow Map
• NWS Products: Drought Monitor | Soil Moisture | US Seasonal Drought Outlook | 7-day Avg. Streamflow
• ENSO update: NOAA's weekly report (ppt)