Eranorms: Past Weather Almanac

Is Today Normal? Compare Data

Free · In‑App Purchases · Designed for iPad

Is it actually hotter than usual today, or does it just feel like it? Stop guessing. Eranorms gives you the immediate historical context for your local weather, benchmarking today’s temperature and rainfall against 30+ years of climate data. Weather apps tell you what is happening now. Eranorms tells you why it matters. By visualizing data from thousands of METAR and ASOS stations globally, we answer the single most important question: "Is this normal?" Whether you are a pilot, a researcher, or just someone who loves checking the stats, Eranorms transforms raw climate archives into beautiful, actionable insights. KEY FEATURES Instant Context See how today’s Julian Day stacks up against history. Is this a record high? A 1-in-10-year freeze? Know instantly with clear "Above Average" or "Below Average" indicators. Professional Visualizations Explore your weather through high-fidelity charts usually reserved for climatologists: • Climate Stripes: Visualize warming trends over decades in a single glance. • Heatmaps: Spot seasonal anomalies and daily deviations. • Box Plots: Understand the statistical spread of temperature and precipitation. Global Station Access Access high-quality data from the Iowa Environmental Mesonet (IEM) and NOAA/CPC sources. Select from thousands of METAR and ASOS stations across the US and international networks. Climate Drivers See the bigger picture with overlay markings for El Nino and La Nina years, helping you correlate global patterns with your local weather. Powerful Utilities • Toggle between Imperial (F, in) and Metric (C, mm) units. • Compare the current year vs. any specific past year. • Save and share data visualizations directly to social media. Download Eranorms today and see the story behind the forecast.

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Fix bug and issues.

Version 1.6.0

The developer, Yellowsquared LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    • Seller
      • Yellowsquared LLC
    • Size
      • 49.6 MB
    • Category
      • Weather
    • Compatibility
      Requires iOS 15.0 or later.
      • iPhone
        Requires iOS 15.0 or later.
      • iPad
        Requires iPadOS 15.0 or later.
      • iPod touch
        Requires iOS 15.0 or later.
      • Mac
        Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.0 or later.
    • Languages
      • English
    • Age Rating
      4+
    • In-App Purchases
      Yes
    • Copyright
      • © 2026 Yellowsquared
  • Developer Website
  • Privacy Policy

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