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WetBulbCast

WetBulbCast

Forecasts with wet bulb temp.

1 ratings
1 review
#196 in free Weather
🔧 Utilities
☀️ Weather
Free

Details

  • Released
  • Updated

Features

Developer

Rob Boer
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WetBulbCast screenshot #1 for iPhone
WetBulbCast screenshot #2 for iPhone
WetBulbCast screenshot #3 for iPhone
WetBulbCast screenshot #4 for iPhone
WetBulbCast screenshot #5 for iPhone
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About

This app provides hourly wet-bulb temperature forecasts for up to 10 days, helping you determine the effectiveness of evaporative coolers. It also includes dew point, feels-like temperature, UV index, wind speed, and precipitation probability for a comprehensive weather overview.

✓Hourly wet-bulb temperature forecast
✓10-day forecast
✓Dew point and feels-like temperature
✓UV index, wind speed, precipitation
✓Interactive weather charts
✓Multiple saved locations
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What's New in WetBulbCast

1.1

July 25, 2026

An Apple Watch app and complication; more ways to show the graphs; a 'scrubber' to show more data in the graphs.

Charts

Top Free

📊 196

Weather

The app has maintained its position at 196 recently.

Last updated on August 4, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Accurate, and excellent

This app calculates wetbulb correctly, has excellent by the hour forecasts, zero ads, and it’s fast and it’s free! The interface is a little clunky, but that’s more than a fair trade for the display of so much useful information.

I had the “Heat Safety” app previously, which absolutely blew the wetbulb calculation. Heat Safety is not recommended.

Big thanks to the creator for making this available for free.
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KMasonSKMasonS

Response from developer

Thanks for the review! I am pleased to see that you find the app useful. I am thinking about how to improve the interface. If you have any ideas for that, please let me know.

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FAQ

What is the wet-bulb temperature and why is it important for WetBulbCast?

The wet-bulb temperature is the lowest temperature that can be reached by the evaporation of water. For evaporative coolers, it's the single most important factor determining how effectively they can cool the air. WetBulbCast provides this crucial data hourly for up to 10 days.

Does WetBulbCast have ads?

No, WetBulbCast does not contain advertisements. It is a completely ad-free experience for users.

How often is WetBulbCast updated?

WetBulbCast uses Apple's WeatherKit for forecasts, which are updated throughout the day. The app itself was last updated on July 13, 2026, to version 1.0.1.

What devices is WetBulbCast available on?

WetBulbCast is available for iPhone and iPad devices, supporting a wide range of Apple users.

Can I check the weather for multiple locations with WetBulbCast?

Yes, WetBulbCast allows you to save multiple locations. This means you can easily check the wet-bulb temperature and other weather details for your home, office, or any other place you care about.

What other weather information does WetBulbCast provide besides wet-bulb temperature?

In addition to wet-bulb temperature, WetBulbCast offers dew point, feels-like temperature, UV index, wind speed, precipitation probability, and cloud cover, providing a comprehensive weather picture.

What is the age rating for WetBulbCast?

WetBulbCast has an age rating of 4+, making it suitable for a broad audience of users.

Is WetBulbCast free to download and use?

Yes, WetBulbCast is completely free to download and use, with no in-app purchases or subscriptions required.