{
    "dataset": "Ilystics weather delay days \u2014 Raleigh-Durham, NC",
    "landingPage": "https://ilystics.com/weather-delay-days/raleigh-durham-nc",
    "license": "https://creativecommons.org/licenses/by/4.0/",
    "attribution": "Ilystics LLC, https://ilystics.com",
    "sourceData": "NOAA NCEI Global Historical Climatology Network - Daily (GHCND), U.S. Government public domain",
    "algorithmVersion": "v2.3.0",
    "generatedAt": "2026-08-23T17:12:35+00:00",
    "baseline": {
        "startYear": 2016,
        "endYear": 2025,
        "observedDays": 3652
    },
    "location": {
        "metro": "Raleigh-Durham",
        "state": "NC",
        "lat": 35.7796,
        "lng": -78.6382
    },
    "soilBasis": {
        "effectiveSoil": "clay",
        "baseDryingDays": 3,
        "label": "Clay, 3.0 base drying day(s)"
    },
    "station": [],
    "scope": "Soil-dependent site work only: earthwork, grading, excavation, foundations and underground utilities. Enclosed and vertical construction is not modelled.",
    "readMe": "Monthly figures are independent baselines and must not be summed into an annual total: doing so assumes a jobsite never improves over a year. See https://ilystics.com/weather-delay-days for the full explanation.",
    "months": [
        {
            "month": 1,
            "monthName": "January",
            "avgPrecipInches": 3.71,
            "lostWorkdaysMean": 14,
            "lostWorkdaysMedian": 15,
            "abnormalThreshold": 17,
            "dryingDaysPerRainDay": 2.57,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 5,
                "2017": 12,
                "2018": 15,
                "2019": 16,
                "2020": 15,
                "2021": 12,
                "2022": 17,
                "2023": 18,
                "2024": 14,
                "2025": 12
            }
        },
        {
            "month": 2,
            "monthName": "February",
            "avgPrecipInches": 3.7,
            "lostWorkdaysMean": 12,
            "lostWorkdaysMedian": 13,
            "abnormalThreshold": 17,
            "dryingDaysPerRainDay": 1.35,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 16,
                "2017": 7,
                "2018": 10,
                "2019": 13,
                "2020": 14,
                "2021": 20,
                "2022": 6,
                "2023": 15,
                "2024": 8,
                "2025": 13
            }
        },
        {
            "month": 3,
            "monthName": "March",
            "avgPrecipInches": 3.36,
            "lostWorkdaysMean": 12,
            "lostWorkdaysMedian": 13,
            "abnormalThreshold": 16,
            "dryingDaysPerRainDay": 1.95,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 12,
                "2017": 11,
                "2018": 18,
                "2019": 14,
                "2020": 6,
                "2021": 15,
                "2022": 14,
                "2023": 14,
                "2024": 10,
                "2025": 10
            }
        },
        {
            "month": 4,
            "monthName": "April",
            "avgPrecipInches": 4.44,
            "lostWorkdaysMean": 10,
            "lostWorkdaysMedian": 10,
            "abnormalThreshold": 14,
            "dryingDaysPerRainDay": 2.09,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 6,
                "2017": 10,
                "2018": 9,
                "2019": 15,
                "2020": 15,
                "2021": 6,
                "2022": 10,
                "2023": 11,
                "2024": 7,
                "2025": 13
            }
        },
        {
            "month": 5,
            "monthName": "May",
            "avgPrecipInches": 4.54,
            "lostWorkdaysMean": 12,
            "lostWorkdaysMedian": 12,
            "abnormalThreshold": 15,
            "dryingDaysPerRainDay": 1.26,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 16,
                "2017": 14,
                "2018": 13,
                "2019": 5,
                "2020": 11,
                "2021": 9,
                "2022": 11,
                "2023": 11,
                "2024": 16,
                "2025": 14
            }
        },
        {
            "month": 6,
            "monthName": "June",
            "avgPrecipInches": 4.14,
            "lostWorkdaysMean": 10,
            "lostWorkdaysMedian": 11,
            "abnormalThreshold": 15,
            "dryingDaysPerRainDay": 1.4,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 14,
                "2017": 13,
                "2018": 9,
                "2019": 10,
                "2020": 12,
                "2021": 11,
                "2022": 7,
                "2023": 7,
                "2024": 1,
                "2025": 19
            }
        },
        {
            "month": 7,
            "monthName": "July",
            "avgPrecipInches": 4.89,
            "lostWorkdaysMean": 11,
            "lostWorkdaysMedian": 12,
            "abnormalThreshold": 16,
            "dryingDaysPerRainDay": 1.57,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 8,
                "2017": 7,
                "2018": 16,
                "2019": 4,
                "2020": 11,
                "2021": 9,
                "2022": 16,
                "2023": 12,
                "2024": 16,
                "2025": 14
            }
        },
        {
            "month": 8,
            "monthName": "August",
            "avgPrecipInches": 6.03,
            "lostWorkdaysMean": 11,
            "lostWorkdaysMedian": 11,
            "abnormalThreshold": 15,
            "dryingDaysPerRainDay": 1.38,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 8,
                "2017": 6,
                "2018": 16,
                "2019": 18,
                "2020": 11,
                "2021": 9,
                "2022": 16,
                "2023": 8,
                "2024": 10,
                "2025": 12
            }
        },
        {
            "month": 9,
            "monthName": "September",
            "avgPrecipInches": 5.22,
            "lostWorkdaysMean": 7,
            "lostWorkdaysMedian": 7,
            "abnormalThreshold": 11,
            "dryingDaysPerRainDay": 1.15,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 8,
                "2017": 5,
                "2018": 10,
                "2019": 1,
                "2020": 8,
                "2021": 4,
                "2022": 8,
                "2023": 6,
                "2024": 16,
                "2025": 5
            }
        },
        {
            "month": 10,
            "monthName": "October",
            "avgPrecipInches": 4.07,
            "lostWorkdaysMean": 8,
            "lostWorkdaysMedian": 9,
            "abnormalThreshold": 12,
            "dryingDaysPerRainDay": 2.5,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 7,
                "2017": 11,
                "2018": 3,
                "2019": 12,
                "2020": 13,
                "2021": 10,
                "2022": 3,
                "2023": 2,
                "2024": 6,
                "2025": 10
            }
        },
        {
            "month": 11,
            "monthName": "November",
            "avgPrecipInches": 3.15,
            "lostWorkdaysMean": 8,
            "lostWorkdaysMedian": 8,
            "abnormalThreshold": 12,
            "dryingDaysPerRainDay": 1.71,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 3,
                "2017": 11,
                "2018": 11,
                "2019": 13,
                "2020": 9,
                "2021": 5,
                "2022": 12,
                "2023": 6,
                "2024": 7,
                "2025": 7
            }
        },
        {
            "month": 12,
            "monthName": "December",
            "avgPrecipInches": 3.74,
            "lostWorkdaysMean": 12,
            "lostWorkdaysMedian": 11,
            "abnormalThreshold": 16,
            "dryingDaysPerRainDay": 1.85,
            "workdayCoveragePct": 100,
            "lostWorkdaysByYear": {
                "2016": 10,
                "2017": 8,
                "2018": 11,
                "2019": 21,
                "2020": 14,
                "2021": 12,
                "2022": 11,
                "2023": 10,
                "2024": 6,
                "2025": 14
            }
        }
    ]
}