How did monthly sea temperature in the Niño 3.4 region change from 2008 to 2011 (°C anomaly vs. 1991–2020)?
This is a real historical chart. Extraplot shows you the beginning and asks you to draw what happens next, then reveals the actual line. Below is the full series with the reveal point marked.
Solid line = visible part you would draw from · dashed violet = the actual revealed data after the cutoff.
The reveal
After the cutoff (Jul 2009), the actual values were:
| Date | Actual value |
|---|---|
| Aug 2009 | 0.56 |
| Sep 2009 | 0.68 |
| Oct 2009 | 0.89 |
| Nov 2009 | 1.46 |
| Dec 2009 | 1.74 |
| Jan 2010 | 1.52 |
| Feb 2010 | 1.25 |
| Mar 2010 | 0.9 |
| Apr 2010 | 0.38 |
| May 2010 | -0.22 |
| Jun 2010 | -0.69 |
| Jul 2010 | -1.07 |
| Aug 2010 | -1.39 |
| Sep 2010 | -1.6 |
| Oct 2010 | -1.69 |
| Nov 2010 | -1.64 |
| Dec 2010 | -1.6 |
| Jan 2011 | -1.54 |
| Feb 2011 | -1.11 |
| Mar 2011 | -0.93 |
| Apr 2011 | -0.77 |
| May 2011 | -0.52 |
| Jun 2011 | -0.38 |
| Jul 2011 | -0.43 |
| Aug 2011 | -0.65 |
| Sep 2011 | -0.8 |
| Oct 2011 | -1.05 |
| Nov 2011 | -1.19 |
| Dec 2011 | -1.06 |
About this dataset
- Category: Climate
- Source: NOAA Climate Prediction Center (ERSST v5)
- Date range: Jan 2008 – Dec 2011
- Data points: 48
- Source fetched: Nov 10, 2026
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