シンシナティ 8月の天気
シンシナティの8月:暑い、雨が多い — 訪れるのにとても良い時期。
2026年9月更新 · ERA5再解析による気候平年値
シンシナティでは12か月中5位 · 8月に訪れたい旅行先で1413か所中711位 · 快適スコア79/100(Bランク)
- 日中
- 29°C
- 夜
- 17°C
- 雨の日
- 8
- 日照
- 11.3 h
- 湿度
- 72%
- 日の長さ
- 14 h

8月のシンシナティについての旅行者の声
Regulars share a local saying that sums up planning here: if you don't like the weather, wait 15 minutes and it's sure to change - advice regulars apply to this month as much as any other, packing for both a sudden downpour and a stretch of sticky heat within the same trip. Our row backs the hot, humid read, 29.1C reading as a hot 32C, over 16.9C nights, with 88.1mm of rain across 8.2 days and humidity at 72 percent. Regulars are consistent that a quick-drying layer beats a heavy raincoat, since storms here tend to blow through fast rather than settle in for the day. The record: 11.3 hours of sun, a 12.1 kph wind and AQI 61.
シンシナティのほかの月
Regulars describe spring rain typically holding on into this month before a drier stretch sets in through the rest of summer, with a well-worn local saying that if you don't like the weather, wait fifteen minutes and it's sure to change. Our row backs the transitional, still-wet read, 28.1C reading as a real 30C, over 15.1C nights, with 102.3mm of rain across 8.9 days. Regulars pushing later into late June and early July are more confident calling it hot and humid outright, so this month sits at the hinge between changeable spring and settled summer heat rather than fully inside either. The record: humidity 70 percent, 11.5 hours of sun, a 14.5 kph wind and AQI 67.
Regulars rate October as one of the drier and milder months here - our row backs it at 66.2mm across 7.7 days - while quoting the local line that if you do not like the weather you should wait fifteen minutes. What that means in practice is layers, with a light sweater for the mornings and evenings: 20.3C days fall to 6.9C nights that feel like 5C. The colour follows the cold, starting around the third week of the month as the overnight temperatures drop, so the back half is the scenic half. The record: humidity 68 percent, 8 hours of sun, a 15.8 kph wind and AQI 35.
A lifelong Cincinnatian's advice for May is to be prepared for all kinds of weather at all times, and the local saying they quote is that if you do not like the weather, wait fifteen minutes. The spread they describe is real: the 70s Fahrenheit and sunny is about as likely as the 40s or 50s and raining, with the average around 21C by day and 10C at night on the 1st. Our row's 23.6C over 10.8C is the month's middle, and the wet half of their prediction is the part the figures back hardest - 119.7mm across 11.8 precipitation days, because spring here stays rainy until the end of June and only then dries out. A medium jacket, heavier than a windbreaker, is what they pack. The record: humidity 73 percent, 9.7 hours of sun and AQI 51.
Cincinnati forum threads describe January as genuinely unpredictable, with posters noting the temperature often hovers right around freezing but a given week could bring snow or a 65-degree day. The city's location was flagged as the reason for the volatility - warm air moving up the Mississippi Valley regularly collides with cold air coming down from Canada right over the Cincinnati area, producing the erratic swings posters described as 'all four seasons in a week.' January and February were named the best odds for snow, though posters noted some winters bring plenty of accumulation and others almost none, with a lot of grey, hovering-near-freezing days as the baseline in between. The standard advice was real layering with a warm coat, gloves and a hat for daily walking around.
地図のシンシナティのカードから自分のメモを追加できます。
シンシナティの気候平年値 — 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月のシンシナティの混雑
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Cincinnati Music Festival、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
シンシナティの天気が良い月
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)。
天気はまずまずシンシナティの天気が最も良いのは5月、9月、10月です — ひと続きのシーズンではなく、別々の時期です。
天気が最高天気はまずまず天気が厳しい
8月のシンシナティのイベント
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。
- 祭り
Cincinnati Opera Summer Festival
6月12日〜8月5日 · 例年音楽祭The country's second-oldest opera company stages its season in summer rather than winter, with productions at the restored Music Hall in Over-the-Rhine from mid-June into early August. 出典 ↗
- 祭り
Cincinnati Music Festival
7月18日〜8月2日 · 例年混雑早めの予約をThree nights of R&B and soul at Paycor Stadium in late July, drawing tens of thousands from out of state. Downtown hotel rates for that weekend are set months ahead and do not move. 出典 ↗
近くで開催中のイベント
シンシナティから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。
シンシナティはどこにある?
8月のシンシナティ — よくある質問
- 8月はシンシナティを訪れるのに良い時期ですか?
- シンシナティの8月:暑い、雨が多い — 訪れるのにとても良い時期。SeasonMapの快適スコアでは、シンシナティの12か月中5位です(79/100)。
- 8月のシンシナティはどんな天気ですか?
- 8月のシンシナティは、平均最高気温29.1°C、最低気温16.9°C、降水量は約88.1 mmで、雨の日はおよそ8.2日です。
- 8月のシンシナティの大気質はどうですか?
- 8月のシンシナティの米国大気質指数(US AQI)は、平均約61です。
300 km圏内:Mammoth Cave National ParkのGreen River paddling season(5月1日〜10月15日ごろ)、IndianapolisのBrickyard 400(7月15日〜8月5日ごろ)。