マンモスレイクス 12月の天気
マンモスレイクスの12月:寒い、雨が多い、空気がきれい — 訪れるのに絶好の時期。
2026年9月更新 · ERA5再解析による気候平年値
マンモスレイクスでは12か月中4位 · 12月に訪れたい旅行先で1413か所中404位 · 快適スコア82/100(Aランク)
- 日中
- 6°C
- 夜
- -9°C
- 雨の日
- 8
- 日照
- 7.6 h
- 湿度
- 65%
- 日の長さ
- 10 h

12月のマンモスレイクスについての旅行者の声
マンモスレイクスのほかの月
Mammoth Lakes-forum threads on an October visit describe peak fall color as genuinely running mid-September through early October, posters warning color at higher elevations has typically passed by the twentieth. Regulars call June Lake Loop, Lundy Canyon and Rock Creek Canyon real standard viewing spots, several posters naming the Tom's Place turnoff as the way into Rock Creek's aspens. Posters call Convict Lake's aspen grove a real highlight, several regulars naming its roughly three-mile loop as an easy way to see color without a long hike. Regulars call timing genuinely shifting year to year with weather, several threads recommending checking weekly updates at the Welcome Center before planning around peak color. Posters recommend lower-elevation spots once higher color has passed, several regulars calling this standard given how the show moves downhill as October progresses. The record: 17.3C days, -1.5C nights, 21.3mm across nearly 3 days and 48 percent humidity.
Mammoth Lakes-forum threads on a late-September visit describe afternoon highs as typically running around the mid-seventies Fahrenheit, posters calling nights considerably chillier, dropping into the mid-forties. Regulars call this genuinely one of the better stretches for hiking, biking, boating and even a last swim, the lakes about as warm as they get all year by this point. Posters recommend Hot Creek, the Earthquake Fault and the Twin Lakes waterfall as easy local drives, June Lake Loop, Mono Lake and Bodie all reasonable if venturing further. Regulars call heading into the high country, Rock Creek to the south or Tuolumne Meadows to the north, a real chance at early fall color. Posters describe local events like an art festival over Labor Day weekend as worth timing a visit around. Regulars recommend real layers for the evening chill despite the pleasant daytime warmth. The record: 22.3C days feeling like 20C, 3.2C nights, 12.5mm across nearly 4 days and 47 percent humidity.
Mammoth Lakes-forum threads on April skiing are consistently enthusiastic, posters calling this among the strongest months of the season thanks to a deep base built from heavy earlier-season storms. Regulars describe spring snow here as genuinely excellent once it softens, smooth corduroy in the morning turning forgiving rather than icy by afternoon. Posters call the mountain noticeably less crowded than winter break, some describing it as nearly empty by mid-to-late April. Regulars are direct year-to-year variability is real, some Aprils bringing fresh storms and a foot or two of new snow, others closer to a bare, sunny stretch. Posters recommend checking current conditions before committing to a specific week. Regulars call the full mountain typically open through the third weekend of April most years. The record: 10.9C days feeling like 9C, -3.2C nights, a notably high 21.6cm of fresh accumulation and 68 percent humidity.
Mammoth Lakes-forum threads comparing seasons call July genuine peak summer, wildflowers out at the high elevations and conditions noticeably milder for hiking than the intense heat of late August. Posters name Devils Postpile, Rainbow Falls and Red's Meadow as standout July destinations, along with the Mono Lake and June Lake Loop area just north for swimming, hiking and horseback riding. Convict Lake, a short drive south, is repeatedly recommended as an easy add-on for anyone with a spare afternoon. Regulars call the days noticeably longer and the evenings still comfortable compared to how quickly things cool once late August arrives. Layers for a genuinely large day-to-night swing at this elevation are standing advice regardless of how warm the afternoon runs. The record: 26.8C days feeling like 25C, 7.3C nights, a low 42 percent humidity and 14.5 hours of daylight.
地図のマンモスレイクスのカードから自分のメモを追加できます。
マンモスレイクスの気候平年値 — 12月
ERA5再解析による月平均値です。AQIはその月の平均US AQI(米国大気質指数)です。
12月のマンモスレイクスの混雑
その場所自体の混み具合 — 学校休暇や大型連休、編集部がタグ付けした月、そして天気の良さによる人気の高さ。快適スコアには含まれません。
ピークの混雑Mammoth ski season、Christmas to New Year ski peak、アメリカ合衆国のWinter / Christmas break(推定)
ピークの混雑混雑ショルダーシーズン閑散
マンモスレイクスの天気が良い月
この旅行先自身の一年間の快適スコアでランキングしています — 混み具合とは別のものです(上の「混雑」を参照)。
天気はまずまずマンモスレイクスの天気がピークを迎えるのは1月〜3月で、特に良いのは2月ごろです。
天気が最高天気はまずまず天気が厳しい
12月のマンモスレイクスのイベント
毎年の季節のイベント、自然の見どころ、休業、祝日 — 厳選し出典を明記しています。
- 季節
Mammoth ski season
11月5日〜5月31日 · 例年混雑Mammoth holds snow longer than anywhere else in California and regularly spins lifts into late May, sometimes past it. The town lives on the season, and weekend traffic on US-395 out of Los Angeles is the price of it. 出典 ↗
- 祝日
Christmas to New Year ski peak
12月20日〜1月3日 · 例年クリスマス・年末年始混雑早めの予約をThe week from Christmas to New Year is the busiest of the ski season: lodging and lift-ticket prices reach their highs, ski school and rentals book out and lift lines are longest. Book months ahead, and early-season snow cover varies year to year. 出典 ↗
- 季節
Snow season
スキーシーズンAbout 72 cm of snow falls in the month.
気候の平年値から算出
近くで開催中のイベント
マンモスレイクスから300 km以内 — 日帰りやちょっとした移動で行けて、今月何かがある場所です。快適スコアには含まれません。
マンモスレイクスはどこにある?
12月のマンモスレイクス — よくある質問
- 12月はマンモスレイクスを訪れるのに良い時期ですか?
- マンモスレイクスの12月:寒い、雨が多い、空気がきれい — 訪れるのに絶好の時期。SeasonMapの快適スコアでは、マンモスレイクスの12か月中4位です(82/100)。
- 12月のマンモスレイクスはどんな天気ですか?
- 12月のマンモスレイクスは、平均最高気温5.7°C、最低気温-9°C、降水量は約96.1 mmで、雨の日はおよそ7.7日です。
- 12月のマンモスレイクスの大気質はどうですか?
- 12月のマンモスレイクスの米国大気質指数(US AQI)は、平均約39です。
- 12月のマンモスレイクスは雪が降りますか?
- 12月のマンモスレイクスの降雪量は、およそ72.3 cmです。
300 km圏内:Santa Cruz, CaliforniaのMonarch butterflies(10月15日〜2月15日ごろ)、MontereyのMonarchs at Pacific Grove(10月20日〜2月28日ごろ)。