Weather Benchmark

Heat days have daily highs at or above your selected heat threshold (100°F by default); freezing days have daily lows ≤32°F, not necessarily all-day freezing. Missing days break streaks; runs stop at calendar-year boundaries. Daily station observations can use observing-day boundaries rather than midnight.

Heat intensity adds max(daily high −selected heat threshold, 0); cold intensity adds max(32°F −daily low, 0), measured in °F-days. Days exactly at the threshold count but contribute zero excess degrees. Annual mean averages (high + low)/2 where both exist. These are comparison measures based on daily extremes, not hourly exposure or standard heating/cooling degree days.

Year selectors list years containing any retrieved observations. Partial years are shown but excluded from rankings. The current year stops at yesterday using your device date and is never ranked against complete years. All available years retrieves each chosen station’s period of record; it does not combine stations or retrieve every historical station in the area.

For each measure, screen up to six NOAA GHCN stations within 50 miles, including nearby cooperative and airport stations. First prefer stations reporting within seven days of the requested endpoint with at least 90% paired-temperature or precipitation coverage in the current year. Then choose by complete recent years, consecutive complete years, daily coverage, and distance. Candidate screening uses ACIS; displayed records use NOAA GHCN-Daily with flagged values excluded, using the same station’s preliminary ACIS reporting series for the current year when it is at least as current as the archive. If the archive download fails, the same station’s available ACIS daily series is shown with an explicit source notice instead. It has not been independently checked against the archive by this app. The source and dates are labeled. Counts from incomplete periods are lower bounds, not full-period totals. This evaluates record coverage, not a guarantee of property-level accuracy. Temperature and precipitation stations can differ; names and distances are shown. Precipitation includes rain and snow/ice water equivalent. Missing and multi-day accumulated precipitation entries are excluded; trace counts as zero measurable inches. A daily maximum cannot establish a maximum hourly rainfall rate.

Historical wind is retrieved directly from NOAA NCEI daily summaries at a separately selected airport station within 50 miles. Daily average, fastest two-minute wind and fastest five-second gust are separate measurements. The wind section shows coverage, station distance, dates and any app-review readings excluded from comparisons. Its year selector can also be changed independently; choosing a temperature/rainfall year selects that wind year when available.