# Eranorms: Past Weather History — Compare Climate Data & Records

> Historical weather context and climate data visualizations for understanding current conditions. (iPhone/iPad app by Yellowsquared LLC.)

- Source: https://appshunter.io/ios/app/eranorms-past-weather-history/id6757374142 (this page in markdown: same URL + `.md`)
- Developer: [Yellowsquared LLC](https://appshunter.io/developer/1785941696)
- Category: Weather, Reference
- Price: Free with in-app purchases
- Rating: 5.00/5 from 4 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 50 MB
- Languages: American English
- Released: 2026-01-30
- Data updated: 2026-08-23
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/eranorms-past-weather-history/id6757374142/reviews.md

## What is Eranorms?

Tired of opening a weather app and still not knowing whether today is unusual?

Eranorms is a historical climate companion for travelers, researchers, gardeners, and curious locals who want context instead of a bare forecast. Compare current conditions with decades of observations from local weather stations before you book a trip, move to a new city, or start a project outdoors.

HOW IT WORKS
1. Pick a city or station.
2. Open Recap to see how today ranks against history.
3. Browse Charts: weather calendar, accumulation, wind rose, trends, distribution, climate stripes, and heatmaps.
4. Open Snapshot for the detailed numbers behind the day.
5. Compare another city or another year, then export what you find.

KEY FEATURES
• 70+ years of historical weather data
• Weather calendar with every day color-coded by temperature
• Seasonal rainfall accumulation against the historical average
• Wind rose charts for speed and direction in any season
• Compare two cities, or this year against past years
• El Nino and La Nina shading on trend and distribution charts
• Climate stripes, anomaly heatmaps, and record highs and lows
• 20+ variables including temperature, rain, wind, snow, dew point, and solar radiation
• Fahrenheit or Celsius, inches or millimeters, knots, mph, or kph

Stop guessing local weather trends. Download Eranorms and see how today fits into history.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://yellowsquared.us/privacy_policy

## Key features

- Historical weather context
- 30+ years of climate data
- Global METAR/ASOS station access
- Climate Stripes visualizations
- Heatmaps and Box Plots
- El Nino/La Nina year overlays
- Imperial/Metric unit toggle

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro | $19.99 | one-time |


## Chart rankings

- #189 in Top Grossing · Weather (US App Store)

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/eranorms-past-weather-history/id6757374142/reviews.md

### 5/5 — Review

*2026-08-22*

Very good app!!!!

### 5/5 — You will love it if you are a weather fan

*2026-08-19*

I love how simple the app is !

### 5/5 — Very useful

*2026-08-19*

Friendly

### 5/5 — I love how this is different from IOS default weather apps

*2026-03-19*

I like the story about weather!

## Frequently asked questions about Eranorms

### What is Eranorms?

Eranorms provides historical context for current weather conditions by comparing them against over 30 years of climate data. It uses visualizations to show if today's temperature and rainfall are normal.

### What kind of data does Eranorms use?

Eranorms accesses high-quality data from thousands of METAR and ASOS stations globally, sourced from the Iowa Environmental Mesonet (IEM) and NOAA/CPC.

### What visualizations are available in Eranorms?

Eranorms offers professional visualizations like Climate Stripes to show warming trends, Heatmaps for seasonal anomalies, and Box Plots to understand statistical spreads of temperature and precipitation.

### Can I compare current weather to specific past years in Eranorms?

Yes, Eranorms allows you to compare the current year's weather data against any specific past year, providing direct historical comparisons.

### Does Eranorms have ads?

No, Eranorms does not contain advertisements. It is a free app with optional in-app purchases.

### What devices does Eranorms support?

Eranorms is available on iPhone, iPad, and iPod, indicated by its support for these devices.

### How often is Eranorms updated?

The latest version of Eranorms, 2.0.2, was released on May 5, 2026, suggesting regular updates to improve functionality and data.

### What is the age rating for Eranorms?

Eranorms has an age rating of 4+, making it suitable for a wide range of users interested in weather data.

## Version history (last 5 releases)

### 3.1.0 — 2026-08-19

Eranorms 3.1.0

• Performance improvements and data visualization enhancements.
• Station search and metric source provenance updates.

### 3.0.6 — 2026-08-17

Eranorms 3.0.6

• Performance improvements and updated App Store screenshots.
• Refined climate stripes and seasonal normals visualization.

### 3.0.3 — 2026-08-13

Eranorms 3.0.3

• New: a banner now tells you when live weather data is delayed, so you know the readings on screen have paused instead of quietly going stale.
• Fixes to chart loading, date controls, and saved selections.

### 3.0.0 — 2026-08-11

Eranorms 3.0 — a rebuilt interface, and a lot more room for your charts.

• New bottom navigation: Recap, Charts, and Snapshot are one tap apart.
• Gallery and Analysis are now a single Charts tab — every chart in one place, in the order you choose.
• A new context bar keeps variable, year, and season within thumb reach instead of covering the chart.
• The old sliding control sheet is gone, so charts get significantly more of the screen.
• Global preferences moved into a tidy Settings menu.
• Redesigned recap cards, with a story progress bar and deeper detail sheets.
• Fixes to seasonal trend lines, distribution charts, and chart data loading.

### 2.3.3 — 2026-08-09

Localized store listing refresh, updated climate comparison screenshots, and metadata improvements.

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All apps by Yellowsquared LLC: https://appshunter.io/developer/1785941696

## Related topics

[weather history](https://appshunter.io/ios/topics/weather-history)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*