ClassicWeather 4+

Just beautiful! This weather app is my favorite of all times. It’s simple, nice graphics, easy to read, not cluttered, you can choose from settings whatever weather parameters you want to see. One of my favorite parts of this app are the daily icons that show the sky conditions. You can have 1, 2 or 3 icons, depending on how detailed you want to see the sky conditions every day. I installed this in my phone a few years ago and I liked a lot the UI, the icons, the weather information given within the app, everything, except the weather source which didn’t seem to match the real conditions from my area. However, one of the more recent updates, the developer changed the source to AccuWeather which is a very reliable weather company and who’s app I had in my phone for “ages”, but didn’t really like the UI, so I wasn’t using it too often. But NOW, my favorite Classic Weather UI in combination with my favorite weather source...I can’t ask for more! Please do not ever stop updating this app!!! My favorite of all times! I also have it on my Mac.
A suggestion to the developer, It’d be better the app would take the whole screen on the phone, I have the iPhone 8 plus and when I open the app, there’s a background showing the blue sky and only in a smaller rectangle in the middle of that background is the the actual weather showing.

UPDATE 2018:
Still using this app after 3 years (after my initial review below).
BTW, the tying app, "Weather On", has since been discontinued.

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In my testing and comparisons, I gave points for streamlined, clear interfaces and discounted points for cluttered and "bloated" interfaces.

The 2 finalists were *this* app and the "Weather On" app. This "Classic Weather" app has the quickest, clearest, and most streamlined interface. I've noticed the developer here is responsive to user feedback and has recently made some slight adjustments to the interface - making the app even better than before.

The other (Weather On) app will better suit your needs, if you need additional information on less commonly referenced weather variables. That app however, IMO, starts to approach a cluttered/confusing feel (with all the extra info).

I’ve tried several weather apps and end up scrolling and tapping and scrolling some more to get the info I want. With Classic Weather, the temp, % chance of rain, wind speed, and amount of sunshine (I got the premium version) are all together in one place. It’s perfect to check before going out for a bike ride or other outdoor activity.