{ "name": "Mammoth Mountain", "alternateNames": [ "Mammoth Mountain Ski Area", "Mammoth", "マンモス山スキー場", "猛獁山滑雪場" ], "type": "ski resort", "url": "https://snowingplaces.com/ski-resorts/mammoth-mountain/", "summary": "A resort in the Sierra Nevada of California, next to the town of Mammoth Lakes, with a season that usually runs from early November through June.", "location": { "country": "United States", "region": "California", "latitude": 37.63, "longitude": -119.03 }, "elevationMetres": { "topLift": 3369, "village": 2424 }, "season": { "opens": "Mid-November", "closes": "Late May" }, "officialWebsite": "https://www.mammothmountain.com", "factsVerified": true, "forecast": { "generatedUtc": "2026-09-18T16:00:00.000Z", "models": [ "ECMWF IFS", "NOAA GFS", "DWD ICON" ], "updateFrequency": "every 3 hours", "topLift": { "headline": "No snow in the next 24 hours.", "detail": "No snow expected in the next 7 days.", "confidence": { "label": "High confidence", "modelsAgreeing": 3, "reason": "all three forecast models agree" }, "next24Hours": { "snowfallCm": { "low": 0, "high": 0, "mean": 0 }, "modelsForecastingSnow": 0, "text": "Under 1 cm" }, "next7Days": { "snowfallCm": { "low": 0, "high": 0, "mean": 0 }, "modelsForecastingSnow": 0, "text": "Under 1 cm" }, "conditionsAtForecastTime": { "temperatureC": 7, "windKmh": 6, "gustKmh": 19, "freezingLevelM": 4200 }, "days": [ { "day": "Today", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 2, "max": 12 }, "maxGustKmh": 34, "freezingLevelM": 4300 }, { "day": "Sat", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": -1, "max": 14 }, "maxGustKmh": 35, "freezingLevelM": 4650 }, { "day": "Sun", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 1, "max": 15 }, "maxGustKmh": 31, "freezingLevelM": 4450 }, { "day": "Mon", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 1, "max": 11 }, "maxGustKmh": 30, "freezingLevelM": 4050 }, { "day": "Tue", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 1, "max": 13 }, "maxGustKmh": 41, "freezingLevelM": 4050 }, { "day": "Wed", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 2, "max": 16 }, "maxGustKmh": 32, "freezingLevelM": 4350 }, { "day": "Thu", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 3, "max": 15 }, "maxGustKmh": 38, "freezingLevelM": 4350 } ], "outlookDays8To14": [ { "day": "Fri 25 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 3, "max": 13 } }, { "day": "Sat 26 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 1, "max": 15 } }, { "day": "Sun 27 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 1, "max": 11 } }, { "day": "Mon 28 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": -1, "max": 11 } }, { "day": "Tue 29 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 0, "max": 14 } }, { "day": "Wed 30 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 1, "max": 11 } }, { "day": "Thu 1 Oct", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": -2, "max": 14 } } ], "modelledSnowDepth": "No snow on the ground", "modelledSnowDepthCm": 0, "localTimeAtForecast": "09:00", "timezone": "GMT-7" }, "village": { "headline": "No snow in the next 24 hours.", "detail": "No snow expected in the next 7 days.", "confidence": { "label": "High confidence", "modelsAgreeing": 3, "reason": "all three forecast models agree" }, "next24Hours": { "snowfallCm": { "low": 0, "high": 0, "mean": 0 }, "modelsForecastingSnow": 0, "text": "Under 1 cm" }, "next7Days": { "snowfallCm": { "low": 0, "high": 0, "mean": 0 }, "modelsForecastingSnow": 0, "text": "Under 1 cm" }, "conditionsAtForecastTime": { "temperatureC": 13, "windKmh": 3, "gustKmh": 17, "freezingLevelM": 4150 }, "days": [ { "day": "Today", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 8, "max": 19 }, "maxGustKmh": 31, "freezingLevelM": 4250 }, { "day": "Sat", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 5, "max": 21 }, "maxGustKmh": 31, "freezingLevelM": 4650 }, { "day": "Sun", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 7, "max": 21 }, "maxGustKmh": 27, "freezingLevelM": 4450 }, { "day": "Mon", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 6, "max": 18 }, "maxGustKmh": 30, "freezingLevelM": 4050 }, { "day": "Tue", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 5, "max": 19 }, "maxGustKmh": 35, "freezingLevelM": 4050 }, { "day": "Wed", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 7, "max": 23 }, "maxGustKmh": 31, "freezingLevelM": 4350 }, { "day": "Thu", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsAgreeing": 3, "temperatureC": { "min": 8, "max": 21 }, "maxGustKmh": 37, "freezingLevelM": 4350 } ], "outlookDays8To14": [ { "day": "Fri 25 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 8, "max": 19 } }, { "day": "Sat 26 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 6, "max": 22 } }, { "day": "Sun 27 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 6, "max": 18 } }, { "day": "Mon 28 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 4, "max": 18 } }, { "day": "Tue 29 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 4, "max": 20 } }, { "day": "Wed 30 Sep", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 5, "max": 18 } }, { "day": "Thu 1 Oct", "weather": "Dry", "snowfall": "No snow", "snowfallCm": null, "modelsWithData": 2, "modelsShowingSnow": 0, "temperatureC": { "min": 5, "max": 21 } } ], "modelledSnowDepth": "No snow on the ground", "modelledSnowDepthCm": 0, "localTimeAtForecast": "09:00", "timezone": "GMT-7" } }, "snowRecord": { "metric": "average days per month with at least 1 cm of snowfall", "period": "2016–2025", "source": "ERA5 reanalysis via Open-Meteo", "elevation": "mid-mountain", "daysPerMonth": { "january": 9.2, "february": 8.5, "march": 11.7, "april": 6.3, "may": 3.6, "june": 0.9, "july": 0, "august": 0, "september": 0.4, "october": 1.8, "november": 5.5, "december": 8.4 }, "shareOfAnnualSnowfallPercent": { "january": 21, "february": 20, "march": 21, "april": 7, "may": 3, "june": 0, "july": 0, "august": 0, "september": 0, "october": 2, "november": 9, "december": 17 }, "averageDailyTemperatureC": { "january": { "low": -10, "high": -0.6 }, "february": { "low": -10.3, "high": -0.6 }, "march": { "low": -9.2, "high": 0.1 }, "april": { "low": -5.7, "high": 4.6 }, "may": { "low": -3.4, "high": 8.3 }, "june": { "low": 2.5, "high": 16.1 }, "july": { "low": 7.2, "high": 21 }, "august": { "low": 6.6, "high": 20.1 }, "september": { "low": 3.3, "high": 16.3 }, "october": { "low": -1.2, "high": 11.1 }, "november": { "low": -5.9, "high": 4.4 }, "december": { "low": -8.7, "high": 0.5 } }, "wintersAsPercentOfAverage": { "2016/17": 167, "2017/18": 83, "2018/19": 135, "2019/20": 58, "2020/21": 54, "2021/22": 77, "2022/23": 198, "2023/24": 78, "2024/25": 75, "2025/26": 74 }, "holidays": { "christmas": { "years": 10, "yearsWithSnowOnGround": 10, "yearsWithFreshSnow": 9 }, "newYear": { "years": 10, "yearsWithSnowOnGround": 10, "yearsWithFreshSnow": 8 }, "midFebruary": { "years": 10, "yearsWithSnowOnGround": 10, "yearsWithFreshSnow": 9 }, "easter": { "years": 10, "yearsWithSnowOnGround": 10, "yearsWithFreshSnow": 7 }, "midJuly": { "years": 10, "yearsWithSnowOnGround": 1, "yearsWithFreshSnow": 0 } }, "note": "Absolute snowfall and depth are not published: ERA5 underestimates them in mountain terrain." }, "sources": [ { "label": "Mammoth Mountain fact sheet, 2022/23 winter", "url": "https://www.mammothmountain.com/-/media/Project/Mammoth/LIBRARY/PDFs/22-23_Marketing_MMSA_Fact-Sheets_web.pdf" }, { "label": "Wikipedia: Mammoth Mountain Resort", "url": "https://en.wikipedia.org/wiki/Mammoth_Mountain_Resort" }, { "label": "Skiresort.com, Mammoth Mountain", "url": "https://www.skiresort.com/en/ski-resort/mammoth-mountain/" } ], "methodology": "https://snowingplaces.com/methodology/", "attribution": "snowingplaces.com. Weather data by Open-Meteo.com." }