AIA A201 Weather Delays: Weather Data

Time-extension terms are set by your contract (such as AIA A201). This page describes the weather data in the PDF, not what a contract allows.

AIA A201 and Weather Data

Time-extension terms and notice deadlines are set by your contract (such as AIA A201); check your contract's own language.

Common Benchmarks for a Historical Comparison

Common benchmarks include:

• Precipitation exceeding the historical mean plus one or more standard deviations
• Record-breaking temperatures for the period
• Wind speeds significantly above seasonal norms
• Multiple consecutive days of adverse conditions
• Named storms or declared emergencies

What the PDF Includes

The single PDF report includes:

• NOAA GHCN-Daily observations for the dates you select
• Day-by-day records of precipitation, temperature, and wind where the station reports it
• Historical baseline comparison using the same calendar window from up to the 10 prior years (minimum 5), for example Jan 15-25 compared with Jan 15-25 in those years
• Statistical flags where a day exceeds the baseline mean by 1 standard deviation
• Station identification with distance from the project site and data coverage

Common Weather Delay Documentation Mistakes

• No historical comparison: A note that it rained, without the day's measurements next to a historical average
• Missing source citations: Using weather data without official NOAA references
• Delayed documentation: Waiting until the end of the project to compile weather records
• Generic weather reports: Using weather.com instead of NOAA station data
• No methodology: Failing to explain how abnormality was determined

How Our Report Supports AIA A201 Time-Extension Requests

The report provides day-by-day NOAA weather data compared with historical averages that you can attach to a time-extension request. It uses a same-calendar-window baseline from up to the 10 prior years (minimum 5):

• Official NOAA GHCN-Daily station data with clear station identification and distance
• Day-by-day weather tables for your exact project dates
• Same-calendar-window baseline from up to the 10 prior years (minimum 5)
• Mean + 1σ statistical thresholds calculated from that baseline
• PDF report
• Clear methodology and NOAA source citations
• PDF download after payment

Timing Your Weather Delay Claim

Time-extension terms and notice deadlines are set by your contract (such as AIA A201); check your contract's own language.

You can download the PDF after payment and attach the day-by-day NOAA comparison to a time-extension request.

Disclaimer: This information is provided for educational purposes and is not legal advice. Consult with a construction attorney for specific contract interpretation and claim strategy. This report does not constitute an official weather certification or guarantee claim approval.