⚠ Beta Prototype Data verification required. All temperature swings, trends, and insights are pulled from live APIs and should be independently verified before citation or use. NOAA data reflects official station records · Open-Meteo provides ERA5 reanalysis data · Day-over-day swing calculations are approximations.
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Temperature Swing Dashboard

Day-over-Day Volatility

How dramatically does your city's temperature swing from one day to the next? Live data from NOAA station records and Open-Meteo ERA5 reanalysis, 2015–2024.

NOAA CDO API + Open-Meteo ERA5 Loading… ⚠ Beta — verify before use · Day-over-day Δ avg temp
City
Compare
Year
Avg Daily Swing
Largest Swing
Smallest Swing
Whiplash Days
YoY Trend
Monthly Avg Swing
— Day-over-day °F change
Seasonal Pattern Avg by month
Annual Trend With regression
Whiplash Events Largest swings · top 50
Threshold 15°F
Window
Cumulative temp shift over 1 consecutive day — events
Start DateEnd DateStart °FEnd °F Total ShiftDirectionSeasonSource
Data Sources
NOAA CDO API — National Centers for Environmental Information Climate Data Online. Daily station records (GHCND dataset), TMAX/TMIN converted to mean temperature. ncei.noaa.gov/cdo-web

Open-Meteo ERA5 — Copernicus Climate Change Service ERA5 reanalysis data served via Open-Meteo historical archive API. 2m temperature, daily mean. open-meteo.com
Methodology & Disclaimer
Temperature swing is calculated as the absolute difference between consecutive daily mean temperatures (|Tn − Tn-1|). NOAA data represents official weather station readings. Open-Meteo provides ERA5 atmospheric reanalysis which may differ from station observations.

⚠ Beta prototype. All data, calculations, and trends should be independently verified before use in research, publication, or decision-making.
R
Regional Comparison

The National Whiplash Map

Where is temperature volatility worst across the country — and is it getting worse? Live data, filterable by season and year across 15 US cities.

NOAA CDO API + Open-Meteo ERA5 Live ⚠ Beta — verify before use · Bubble = avg swing intensity
Season / Month
Year
Swing Intensity Map Bubble size + color = avg °F swing
CalmVolatile
City Rankings Click to toggle
Year-over-Year Trends
YoY Swing Trends — All Cities Annual avg for selected period
Monthly Pattern — Top 6 Cities Spring / fall whiplash peaks
Data Sources
NOAA CDO API — GHCND daily station records, nearest station per city. ncei.noaa.gov/cdo-web

Open-Meteo ERA5 — Atmospheric reanalysis, 2m daily mean temperature. open-meteo.com
Methodology & Disclaimer
Swing = |Tn − Tn-1| between daily mean temperatures. Where NOAA station data has gaps, Open-Meteo ERA5 fills. Values may differ between sources due to station proximity, elevation, and reanalysis smoothing.

⚠ Beta prototype. Independently verify all data before use.