- Giants
- Our World in Data
- Weather forecast accuracy
Weather forecast accuracy
Our World in Data's line chart drew 138.5K views on X: 4.8x its typical post and #16 of 139 Our World in Data charts we track by views. Read Oct 10, 2026.
Weather forecasts have become much more accurate. A four-day forecast today is as accurate as a one-day forecast 30 years ago.
Why it spread
It spread because an independent author explained a self-evident chart about weather forecast accuracy, earning 1,316 likes, 298 reposts, 37 quotes, 269 saves, and 138,531 views.
What worked
- The post text clearly states the main finding: a four-day forecast today is as accurate as a one-day forecast 30 years ago.
- The chart is highly self-labelling, showing forecast accuracy for 3, 5, 7, and 10 days in advance without needing extra explanation.
- The source line is shown and the account is an independent author, which builds trust and makes the chart easy to share.
What to borrow
We could use the same form by pairing a simple, self-labelling line chart with a plain-language headline that states the key comparison, and by always showing our source line.
Careful
Do not copy the exact numbers or the weather topic, and do not over-read the quote rate or source reach as guarantees of success.
Written by our analysis model from the measured numbers above, not by Our World in Data.
Make it yours
Your numbers, in this line chart.
Starts from the real numbers of "The accuracy of weather forecasts has improved" by Our World in Data. Replace every number with yours before you post. Make one like this, step by step
Free pictures carry a small "Made with ViralChart" line. That line is how other people find us.
API · Max
Use this chart via API
On the Max plan you can pull this chart's numbers with the provenance of each one, as JSON or CSV, with its redraw spec, or call it from an agent over MCP. Chart id 8dec9b35baf1.
| Path | Returns | Plan | |
|---|---|---|---|
| GET | /api/v1/charts/8dec9b35baf1 | Title, publisher, date, form, point count; with a Max key, the data link | Open |
| GET | /api/v1/charts/8dec9b35baf1/data | Every point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSV | Max |
| GET | /api/v1/charts/8dec9b35baf1/render?view=1 | The draw-only view this page uses | Open |
| POST | /mcp | Tool get_chart_data with this id, for Claude, Cursor and other agents | Max |
curl -s https://viral-chart.com/api/v1/charts/8dec9b35baf1/data \
-H "Authorization: Bearer $VIRALCHART_KEY"claude mcp add --transport http viralchart https://viral-chart.com/mcp \
--header "Authorization: Bearer $VIRALCHART_KEY"60 requests a minute per key; over that you get 429 with Retry-After. Up to 5 keys per account, made on your account page and shown once. Without Max, the data route answers 402 with a link to the plans. The numbers describe a chart its publisher owns, and every file carries a license note.
More from Our World in Data
All 139
Other giants using a line chart
All 295
Questions people ask
How far did Our World in Data's "Weather forecast accuracy" chart travel?
138,531 views, 1,316 likes, 298 reposts and 269 saves on X, read Oct 10, 2026. A normal post from @OurWorldInData gets about 28.6K views.
What kind of chart is it?
A line chart. Accuracy of weather forecasts has improved over time.
Can I use Our World in Data's chart?
Use the format, not the picture. The chart, logo and design belong to Our World in Data. ViralChart redraws the chart type with your numbers and words, and credits the original publisher.