# Weather Calculations — Heat, Wind Chill, Dew Point...

> Comprehensive weather calculator for heat, wind chill, dew point, and apparent temperature. (iPhone/iPad app by MaoWare Corporation.)

- Source: https://appshunter.io/ios/app/weather-calculations/id489771210 (this page in markdown: same URL + `.md`)
- Developer: [MaoWare Corporation](https://appshunter.io/developer/383841907)
- Category: Weather, Utilities
- Price: $1.99
- Rating: 3.00/5 from 4 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 20 MB
- Languages: English
- Released: 2011-12-21
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/weather-calculations/id489771210/reviews.md

## What is Weather Calculations?

Weather Calculations is the only weather calculator you will need.  It contains 6 calculators in one: Heat Index, Wind Chill, Dew Point, Apparent Temperature, Humidex, and Wet Bulb Globe Temperature.

This calculator handles both imperial and metric units (with built-in unit converter).  Enter the air temperature in Fahrenheit or Celsius.  Enter the wind speed in miles per hour, meters per second, kilometers per hour, or knots.  Many more units included!

Compare various models to see which matches how you perceive the weather.  Explore what-if scenarios to better understand weather modeling.


**Heat Index Calculator**
Heat Index calculates the Heat Index from models by the US National Weather Service.

Notes: Heat Index is defined for temperatures above 80 degrees F (27 degrees C) and relative humidity above 40%.  Calculator may not be accurate outside those ranges.


**Wind Chill Calculator**
Wind Chill calculate the wind chill using both the new (post-2001) and old (pre-2001) Windchill Temperature (WCT) index from models by the US National Weather Service.  It also provides the old Windchill Index in kcal/m^2/h.

Notes: Windchill Temperature is defined for temperatures below 50 degrees F (10 degrees C) and wind speeds above 3 mph (4.8 kph or 1.34 m/s).  Calculator may not be accurate outside those ranges.


**Dew Point Calculator**
Unlike some calculators which only calculate the dew point temperature, the Dew Point Calculator will also calculate the air temperature given the dew point temperature and relative humidity as well as calculate the relative humidity given the air temperature and the dew point temperature.

This calculator uses the more accurate August-Roche-Magnus model and is accurate for temperatures between 32°F (0°C) and 140°F (60°C).


**Humidex Calculator**
Humidex is a quick heat index calculator.  Want to know the effect of humidity on how hot it feels?

Humidex calculates the humidex from models by the Meteorological Service of Canada.

**Apparent Temperature Calculator**
Apparent Temperature uses the three factor model developed by the Australian Bureau of Meteorology, which assumes a sunny day.

This advanced model works for high and low temperatures, combining the effects of humidity and wind chill into a single 'feels like' apparent temperature.


**Wet Bulb Globe Temperature Calculator**
Wet Bulb Globe Temperature is an estimate of how hot it feels with humidity?

Enter the temperature and relative humidity, and Wet Bulb Globe Temperature calculates the WBGTI describing how temperature and humidity feels.  Flag indicators help you to quickly identify the risks of outdoor activities.  These indicators are based on the system used by the USMC (see: http://www.mcrdpi.usmc.mil/weather.asp for more details).

This WBGT index calculator uses the same approximation as the Australian Bureau of Meteorology for estimating the Wet Bulb Globe Temperature from the air temperature and relative humidity, assuming sunny day and light wind.  On cloudy or windy days, this is an overestimation of how hot it feels.

## Key features

- Heat Index Calculator
- Wind Chill Calculator
- Dew Point Calculator
- Apparent Temperature Calculator
- Humidex Calculator
- Wet Bulb Globe Temperature Calculator
- Imperial and metric unit conversion

## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/weather-calculations/id489771210/reviews.md

### 1/5 — Terrible

*2019-01-30, version 7.0.0*

No negative button for minus temps

### 1/5 — Disappointing

*2017-12-31*

Save your money.  It's a good idea, but you have to enter all the information manually.  It should at least be able to input the temp automatically based on your location.  Will be deleting!

### 1/5 — Nothing good to say about this app DO NOT BUY

*2017-10-13, version 5.0.0*

1. Last release 1 year ago
2. No support for IOS 11
3. Keyboard covers results for some calculations with no ability to close it
4. Not able to move screen ti view results
5. No screen rotation
6. Need I say more?

### 1/5 — Wind Chill calculations don't work for Canada

*2014-11-09*

App doesn't accept metric units :-(

### 5/5 — Excellent app

*2014-07-23, version 3.0.0*

A nice easy to use app.  It is useful in understanding the relationship between the air temperature, relative humidity, sunlight and the heat index.  It also computes ‘Apparent Temperature’  which is similar to the heat index but includes the effects of the wind.  Although easy to use and understand, the addition of some included documentation would be useful (e.g.,  the apps computes ‘wind chill’ -  but what is ‘Wind Chill Index’, and what are representative radiation levels for sunny and cloudy days in the summer and winter.)  

A great app just as it is.  However, it would be a nice addition if the next app upgrade would include a setting to automatically go out to the web and automatically enter information.

### 5/5 — Great app

*2014-04-25, version 3.0.0*

Nice tool to use

### 2/5 — Disappointed ...no context provided to the calculations.

*2014-02-07*

Not for "Joe Public" ..... cannot enter temperatures in Centigrade for a start as there is no optional setting, then there is no information to explain the relationships that the calculations mirror. Old and new scales are not explained and the rating system of "black flag" days etc is not quantified in terms of how a person would feel ie signs and symptoms.

### 5/5 — Good tool

*2014-01-31, version 3.0.0*

Good tool

### 2/5 — Needs a "Settings" Menu

*2013-09-04*

I agree with the reviewer, "xparticle" that it's frustrating to always have to change the units to metric when I use this app. I'm Canadian and live in a region where wind chill can make a major difference in how you dress, so I use this app virtually every day in the winter. The only exception is "Humidex," as this is Canadian, so it's always set to metric units.

This app needs a "settings" menu so users can set units on all applicable categories to metric automatically, if they wish, and retain that setting permanently, even after closing the app. This is its major weakness for users outside the U.S. There are a lot of us and this issue is a hinderance to making this app truly user-friendly. Fix it, and this app is a winner, because otherwise, it really has no competition as full-featured.

### 1/5 — Not worth the money.

*2013-09-02, version 3.0.0*

You have to enter the information manually.

## Frequently asked questions about Weather Calculations

### What weather calculations does Weather Calculations offer?

Weather Calculations includes six key tools: Heat Index, Wind Chill, Dew Point, Apparent Temperature, Humidex, and Wet Bulb Globe Temperature. These help you understand how various atmospheric conditions affect how the weather feels.

### Can I use Weather Calculations with both Fahrenheit and Celsius?

Yes, the app supports both imperial and metric units for temperature and wind speed, with a built-in unit converter. You can enter temperatures in Fahrenheit or Celsius and wind speeds in various units like mph, m/s, kph, or knots.

### How accurate are the calculations in Weather Calculations?

The app uses models from reputable sources like the US National Weather Service and the Meteorological Service of Canada. Specific calculators have defined ranges for accuracy, such as the Heat Index calculator being accurate for temperatures above 80°F and humidity above 40%.

### Does Weather Calculations have ads?

No, Weather Calculations does not contain advertisements. It is a paid application that offers a focused experience without interruptions.

### What is the price of Weather Calculations?

Weather Calculations is available for a one-time purchase of $1.99. This grants you access to all its features and calculators.

### What devices is Weather Calculations compatible with?

Weather Calculations is designed for iOS devices, including iPhone, iPad, and iPod. It requires a compatible iOS version.

### How often is Weather Calculations updated?

The app was last updated on December 3, 2018, with version 7.0.0. While updates may not be frequent, the core functionality remains robust for its intended purpose.

### What is the age rating for Weather Calculations?

Weather Calculations has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

## Version history (last 5 releases)

### 7.0.0 — 2018-12-03

- iOS 12 support
- iPhone XR/XS/XS Max support

### 6.0.0 — 2018-03-17

- iOS 11 support
- iPhone X support

### 5.0.0 — 2016-06-29

- iOS 9 support
- iPhone 6s / iPad Pro support

### 4.0.0 — 2014-11-27

- iOS 7 / 8 support
- iPhone 6 / iPhone 6 Plus support

### 3.0.0 — 2013-08-15

- Include effect of radiation on apparent temperature
- Show numeric keyboard by default on iPad

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All apps by MaoWare Corporation: https://appshunter.io/developer/383841907

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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 2026-06-10.*