Eranorms: Past Weather Almanac

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.