セドナ 8月の天気
セドナの8月:猛暑、ときどき雨、空気がきれい — 訪れるのにまずまずの時期。
2026年9月更新 · ERA5再解析による気候平年値
セドナでは12か月中10位 · 8月に訪れたい旅行先で1413か所中1147位 · 快適スコア57/100(Dランク)
- 日中
- 34°C
- 夜
- 18°C
- 雨の日
- 5
- 日照
- 12 h
- 湿度
- 48%
- 日の長さ
- 13 h

8月のセドナについての旅行者の声
セドナのほかの月
Sedona-forum threads on a February visit describe daytime highs as genuinely typically in the sixties with real sunshine, posters naming nights dropping into the thirties as the standard overnight swing. Regulars call any snow genuinely quick to melt by midday, several posters warning rocks turn slippery afterward, especially near caves and shaded ledges. Posters call rain the more likely alternative when snow doesn't fall, several regulars naming muddy trails as the real result either way. Regulars call December through February genuinely the best hiking stretch of the year here, several threads naming this the reason locals recommend winter over the brutal summer heat. Posters recommend real traction and caution on red rock after any precipitation, several regulars calling this standard given how slick the surface gets. The record: 13.9C days, -1C nights, 38.9mm across over 4 days and 58 percent humidity.
Sedona-forum threads on March weather call this genuinely one of the more popular months, posters describing daytime highs typically in the sixties to seventies Fahrenheit while nights turn noticeably chilly. Regulars call spring break a real crowd factor, March traffic and trailhead parking considered busy every day of the week though weekends run noticeably worse. Posters recommend booking accommodation well ahead given how far in advance March fills up, several regulars calling it genuine peak season locally. Regulars call Bell Rock, Boynton Canyon and Red Rock Crossing all solid March hikes, the Chapel of the Holy Cross and Tlaquepaque worthwhile non-hiking additions. Posters call solitude still findable in March for anyone willing to skip the most photographed viewpoints, real quiet available just off the busiest trails. The record: 17.2C days feeling like 16C, 1.7C nights, 45.2mm across nearly 6 days and 47 percent humidity.
Sedona-forum threads asking whether July is too hot describe daytime readings as commonly in the mid-nineties to low hundreds Fahrenheit, posters calling the low humidity at least some consolation. Regulars recommend hiking by sunrise and being finished before ten, the heat building fast enough that a midday trail attempt becomes genuinely risky. Posters call carrying far more water than feels necessary standing advice, dehydration here sneaking up quickly even on a short red-rock walk. Regulars recommend waiting until five or six before heading back out for a second round, the worst of the afternoon heat easing by then. Posters describe nights as genuinely pleasant by contrast, temperatures dropping into the sixties Fahrenheit and called wonderful after a scorching day. Regulars call the red rocks still worth the trip in July for anyone willing to plan around the heat. The record: 36C days feeling like 36C, 18.8C nights, 43.2mm across over 5 days and 40 percent humidity.
Sedona-forum threads asking if January is too cold get a nuanced answer: afternoons regularly reach comfortable temperatures in the 50s to 60s Fahrenheit under sunny skies, genuinely pleasant for hiking the red rock trails, but mornings and evenings drop to freezing or below, cold enough that layering matters more than the daytime high alone suggests. Posters describe the month as variable year to year - some Januarys pass with barely any snow, others bring a real blizzard severe enough to shut the town down for days. Regulars are consistent that heavy snow accumulating in Sedona itself, versus the surrounding higher terrain, is uncommon though it does happen. The standing advice is to check the specific week's forecast and pack for both a sunny hike and a genuinely cold snap. The record: 11.9C days feeling like 8C, -1.8C nights, 42mm across 4.8 days, a notably high 19.5cm of fresh snowfall, 61 percent humidity and 8.2 hours of sun.
地図のセドナのカードから自分のメモを追加できます。
セドナの気候平年値 — 8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。
8月のセドナの混雑
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Slide Rock swimming season、アメリカ合衆国のSummer break、主な訪問国のうち2か国で学校休暇(推定)
ピークの混雑混雑ショルダーシーズン閑散
セドナの天気が良い月
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)。
天気が厳しいセドナの天気が最も良いのは4月、10月、11月です — ひと続きのシーズンではなく、別々の時期です。
8月はSummer heatと重なります。
天気が最高天気はまずまず天気が厳しい
8月のセドナのイベント
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。
- ルール
Trailhead shuttle only
1月1日〜12月31日休業The car parks at Cathedral Rock, Soldier Pass and Dry Creek are closed to cars on the days the free shuttle runs, which is most of the week. Park in town and ride, or walk a long way in. 出典 ↗
- 季節
Slide Rock swimming season
5月15日〜9月15日 · 例年夏季営業スタート混雑The natural chute in Oak Creek is the summer answer to the heat, and the state park car park fills and closes to new arrivals by mid-morning at weekends. High bacteria counts close it some weeks.
- 要注意
Summer heat
6月1日〜9月10日 · 例年酷暑At 1,300 metres Sedona is cooler than Phoenix and still too hot to walk red rock after ten in the morning. Slide Rock on Oak Creek is where everyone goes instead, and it fills by nine. 出典 ↗
- 季節
North American monsoon
7月1日〜9月15日 · 例年リスクStorms build over the rim most summer afternoons and break hard over the canyon, then clear into the best light of the year. Slot canyons and creek crossings are the risk, not the road.
近くで開催中のイベント
セドナから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。
セドナはどこにある?
8月のセドナ — よくある質問
- 8月はセドナを訪れるのに良い時期ですか?
- セドナの8月:猛暑、ときどき雨、空気がきれい — 訪れるのにまずまずの時期。SeasonMapの快適スコアでは、セドナの12か月中10位です(57/100)。
- 8月のセドナはどんな天気ですか?
- 8月のセドナは、平均最高気温33.9°C、最低気温17.8°C、降水量は約35.8 mmで、雨の日はおよそ4.5日です。
- 8月のセドナの大気質はどうですか?
- 8月のセドナの米国大気質指数(US AQI)は、平均約39です。
300 km圏内:Zion National ParkのCalifornia condors over the canyon(1月1日〜12月31日)、Grand Canyon National ParkのNorth Rim season(5月15日〜10月15日ごろ)。