# Mean-temperature anomaly (Chapel Hill 2 W, seven-day window) | PIER20 benchmarks

What does Mean-temperature anomaly (Chapel Hill 2 W, seven-day window) show?

Mean-temperature anomaly (Chapel Hill 2 W, seven-day window) is a source-faithful PIER20 calculation from NOAA/NCEI data. Scope: NOAA GHCN station Chapel Hill 2 W (GHCND:USC00311677), North Carolina. Each chart point covers the seven calendar days ending on that date; anomalies use 1991–2020 same-window normals. It follows the published eligibility, denominator, missing-value, revision and coverage rules in the Phase 1 computation contract.

As of **9 Aug 2026**, the latest reading is **1.09 °C**. That is up 5.75 °C over the past year and above its long-run median of 0.44 °C.

## Summary statistics (full history)

| Series | First | Latest | Min | Max |
|---|---|---|---|---|
| PIER20 calculation: Mean-temperature anomaly (Chapel Hill 2 W, seven-day window) | 0.57 | 1.09 | -8.32 | 11.48 |

## Last 24 readings

| Date | PIER20 calculation: Mean-temperature anomaly (Chapel Hill 2 W, seven-day window) |
|---|---|
| Jul 2026 | 3.74 |
| Jul 2026 | 3.08 |
| Jul 2026 | 2.53 |
| Jul 2026 | 2.11 |
| Jul 2026 | 1.40 |
| Jul 2026 | 0.80 |
| Jul 2026 | 0.41 |
| Jul 2026 | 0.47 |
| Jul 2026 | 0.77 |
| Jul 2026 | 1.09 |
| Jul 2026 | 1.34 |
| Jul 2026 | 1.59 |
| Jul 2026 | 2.06 |
| Jul 2026 | 2.16 |
| Jul 2026 | -2.46 |
| Aug 2026 | -2.03 |
| Aug 2026 | -1.21 |
| Aug 2026 | -0.55 |
| Aug 2026 | -0.24 |
| Aug 2026 | -0.33 |
| Aug 2026 | -0.02 |
| Aug 2026 | 0.49 |
| Aug 2026 | 0.99 |
| Aug 2026 | 1.09 |

## Frequently asked questions

**What is the current mean-temperature anomaly (Chapel Hill 2 W, seven-day window)?**

As of 9 Aug 2026, the latest reading is 1.09 °C. That is up 5.75 °C over the past year and above its long-run median of 0.44 °C.

**How often is this benchmark updated?**

This benchmark is built on daily data. The page is refreshed when the source publishes new observations; the freshness block below the chart shows the exact data-through date and when PIER20 last fetched the file.

**What data sources does this chart use?**

The chart is built from PIER20 calculation: Mean-temperature anomaly (Chapel Hill 2 W, seven-day window), sourced from NOAA/NCEI.

## Methodology

- Formula: mean((TMAX + TMIN)/2) − same-window normal
- Frequency: Daily
- Sources: PIER20 calculation: Mean-temperature anomaly (Chapel Hill 2 W, seven-day window) (NOAA-05) https://www.ncei.noaa.gov/cdo-web/webservices/v2. Data via NOAA/NCEI.
- Data through: 9 Aug 2026
- Last refreshed: 12 Aug 2026

Full interactive chart: https://pier20.com/benchmarks/phase1-noaa-05
Disclaimer: research software output, not investment advice.