キーウェスト 12月の天気
キーウェストの12月:暖かい、ときどき雨、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
キーウェストでは12か月中7位 · 12月に訪れたい旅行先で1413か所中371位 · 快適スコア83/100(Aランク)
- 日中
- 26°C
- 夜
- 20°C
- 雨の日
- 5
- 日照
- 8.9 h
- 湿度
- 78%
- 日の長さ
- 11 h

12月のキーウェストについての旅行者の声
近くのエバーグレーズ国立公園からのメモ(128 km)
キーウェストには12月のメモがまだありません — これは季節を共にする近くのエバーグレーズ国立公園についてのメモです。
Everglades-forum threads on the best time of year consistently point to December through March, and posters call December specifically the start of the reliably dry-season stretch, comfortable, breezy conditions replacing summer's oppressive heat and near-daily storms. Regulars describe wildlife viewing as genuinely stronger this time of year, lower water levels concentrating alligators, crocodiles and wading birds around the remaining pools rather than scattering them across the flooded high-water landscape. Mosquito pressure is called dramatically lower than the warmer months, a real quality-of-life difference for anyone hiking the boardwalk trails. Posters name Anhinga Trail and Shark Valley as the standout December picks for reliable, close-up wildlife sightings. Regulars call the crisp light this month a genuine bonus for photography. The record: 26.2C days feeling like 27C, 17.3C nights, a low 76 percent humidity and 10.5 hours of daylight.
キーウェストのほかの月
Regulars are consistent this counts as genuinely pleasant overall, warm and sunny with little rain chance the norm, though several cold fronts each winter bring a handful of windy, noticeably chillier days, temperatures dropping 10-15 degrees below the run of the month. Our row backs that mild, still-dry read, 23.9C over 17.9C nights, with 46.9mm of rain across 5.2 days and a real 30.9 kph wind. Regulars are consistent this is high season here, prices climbing accordingly, jeans and a light sweater the standard packing advice for evenings and any cold-front days rather than a full coat. The sea sits at a swimmable 24.6C despite the water reading cooler than the air on paper. The record: humidity 77 percent, 9 hours of sun and AQI 45.
Regulars call this a transitional month rather than a settled one - awesome, un-oppressive weather in some years, hot and humid in others, with the one consistent change being winter's wind finally easing off, which makes it a favoured month for getting out on the water. Our row leans toward the warmer read, 30.2C reading as 34C at 77.1 percent humidity, over 24.1C nights, with 103.6mm of rain across 6.9 days. Regulars are specific about the calendar that follows: real humidity builds from late May, June brings the heat and the start of hurricane season in earnest, so May is the last easy month before both arrive. The sea stays calm and warm at 28.6C, good for fishing and snorkelling either way. The record: 11.9 hours of sun, a 25.7 kph wind and AQI 44.
Key West-forum threads on November weather call it, along with October, one of the genuinely nice stretches of the year - warm days, cool nights, humidity down from summer's peak, closer in feel to spring than to the hurricane-season months just before it. Showers do still happen, but posters say it's rare for one to be more than something passing through rather than a washed-out day, and some stretches go by without a cloud in sight. The end of the month can turn unpredictable - a late-season storm or a couple of chillier days are possible - but the average still comes out ahead of what preceded it. High-season lodging rates don't kick in until mid-December, making early November good value too, alongside a couple of specific events in the first half of the month. The record: 27.3C days feeling like 29C, 21.9C nights, 68mm across 4.9 days, a 27.4C sea, 76 percent humidity, wind averaging over 29 km/h and 9.5 hours of sun.
February in Key West is sunny and mostly dry - our row gives 41.4mm across 3.7 days - with an average high near 76F and a low near 66F, and most visitors getting 70s-to-80s days and cool nights. The word regulars repeat is windy. Our row's 28.6 kph is the strongest wind of the Key West year, and the consequences they list are the water ones: it is not a great month for water activities, and the wind is enough to make the ferry a poor bet. A cold front can also drop a couple of days into low-60s highs and low-50s nights, which is why the packing advice is shorts plus one sweatshirt. This is also peak season. The record: 26C days, 19.9C nights, 10.1 hours of sun and a 25.3C sea.
地図のキーウェストのカードから自分のメモを追加できます。
キーウェストの気候平年値 — 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月のキーウェストの混雑
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Christmas and New Year、アメリカ合衆国のWinter / Christmas 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
キーウェストの天気が良い月
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)。
天気はまずまずキーウェストの天気は一年を通じて大きく変わりません — どの月も快適さはほぼ一定です。
12月のキーウェストのイベント
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。
- 祝日
Christmas and New Year
12月20日〜1月3日クリスマス・年末年始混雑早めの予約をThe start of the winter high season and the fortnight the island charges the most. New Year's Eve is marked by several competing drops on Duval rather than one, which tells you most of what you need to know. 出典 ↗
近くで開催中のイベント
キーウェストから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。
キーウェストはどこにある?
12月のキーウェスト — よくある質問
- 12月はキーウェストを訪れるのに良い時期ですか?
- キーウェストの12月:暖かい、ときどき雨、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、キーウェストの12か月中7位です(83/100)。
- 12月のキーウェストはどんな天気ですか?
- 12月のキーウェストは、平均最高気温25.6°C、最低気温19.8°C、降水量は約65.4 mmで、雨の日はおよそ4.8日です。
- 12月のキーウェストの大気質はどうですか?
- 12月のキーウェストの米国大気質指数(US AQI)は、平均約43です。
300 km圏内:Everglades National ParkのWading bird nesting(12月1日〜4月15日ごろ)、HavanaのHavana Film Festival(12月3日〜13日)。