Climathélie
The world's climate, in your pocket — 86 years, any place
What it does
Climathélie shows the true climate of any place on Earth: 22 normals (temperature, rain, snow, sunshine, wind, sea, UV…) averaged over 86 years of Copernicus ERA5 archives. Compare two places month by month, export CSV, use it offline. €0.99 once.
22 climate normals for 7,778 cities and any point on Earth, averaged since 1940. Comparisons, charts, CSV export, offline mode. One-time payment, no subscription.
Temperature, rain, sunshine, wind, sea, UV… Climathélie reveals the 22 climate normals of 7,778 cities — and any point on Earth — averaged since 1940. Compare two places, plot the curves, take it all offline. One-time payment. No subscription. The app opens immediately after checkout. Works on iPhone, Android and computers. Hélie, our sun, walks you through the app — narrated, with captions. Sound on 🔊 Average and extreme temperatures, precipitation, rainy and snowy days, sunshine, humidity, wind, UV, sea temperature… the complete climate portrait of a place, in clear tables and curves. WMO 1991–2020 normals by default, or any range of years you choose. A precise date, a week, a month, a…from climathelie.neocities.org
Does the same job
all alternatives →- AWA world map of 24x365 average temperature “fingerprints”2021 · weatherspark.com · ▲347




- PTProbably the most comprehensive weather API currently available2020 · ▲22
This was posted before but I'm quite pleased to share a major update for https://oikolab.com. We now have available seven decades of hourly weather data starting from 1950 for any location in the world, thanks to the recent publication of ERA5 reanalysis data from European Centre for Medium-Range Weather Forecasts (ECMWF). ERA5 is gap-free, gridded dataset generated using data assimilation method (https://en.wikipedia.org/wiki/Data_assimilation), similar to NWP models but with the benefit of hindsight. As far as we're aware of, we're the first weather data…
More life & fun this month
the category →- TL
Life & fun · 10d ago · louisabraham.github.io

Photosynthesis fires two of your iPhone
Life & fun · 28d ago · photosynthesis.camera
SoloUno▲310Take control of hair pulling, nail biting & skin picking
Life & fun · 28d ago · solouno.io

Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is


Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com