ハコ 1月の天気
ハコの1月:猛暑、雨が多い、空気がきれい — 雨の日22日が気にならなければ悪くない時期。
2026年9月更新 · ERA5再解析による気候平年値
ハコでは12か月中3位 · 1月に訪れたい旅行先で1413か所中331位 · 快適スコア85/100(Aランク)
- 日中
- 28°C
- 夜
- 24°C
- 雨の日
- 22
- 日照
- 10.4 h
- 湿度
- 81%
- 日の長さ
- 12 h

1月のハコについての旅行者の声
January opens the hottest, driest run of the Costa Rican year, with strong sun and lower humidity - and regulars still say to expect some rain most days, generally in the afternoon or at night. Our 22.2 precipitation days across 120.4mm is that, five millimetres a day, and one visitor's accounting is the clearest version: roughly eight hours of rain across a week, five of them after dark. Their weather apps had predicted rain daily. The date worth knowing is the 6th: the first days of January are peak holiday travel, and waiting until after about then means the Christmas crowds have gone and prices ease, though it stays high season. A light poncho and a small umbrella cover it. The record: 28.4C over 24.4C reading as 34C, a 28.9C sea and AQI 33.
ハコのほかの月
Regulars are specific this area reads as genuinely drier than areas further south along the same coast, where the rainy season doesn't properly end until mid-to-late December, though conditions here have shifted from the old reputation of reliably rain-free North winds - even the tail end of the month can now bring real rain some years. Our row backs that hot, genuinely wet read, 27.6C reading as a scorching 33C, over 24C nights feeling 29C, with a substantial 278.6mm of rain across 28.5 days and humidity at 86 percent. Regulars are consistent Costa Rica's weather is genuinely location-dependent given how many separate weather systems affect the country, no single verdict applying evenly countrywide. The sea sits at a bath-warm 29.1C. The record: 9.9 hours of sun, a 9.7 kph wind and AQI 32.
The consensus on April for this coast is that it is transitional - not the driest, nowhere near the wettest - and our row proves it exactly: 242.9mm here against 581.8mm in May and 829.3mm in October. What the numbers cannot show is the timing, and the board supplies it: rain on the central Pacific coast comes in the afternoon or overnight, it is warm rain, and the weather apps that promise rain all day every day are wrong about the shape while right about the odds. Our 27.6 rainy days is that same statement. Pack fast-drying clothes rather than cotton, and something light to keep it off. Heat holds at 29.1C reading as 36C, with a 30.3C sea. The record: humidity 83 percent, 10.4 hours of sun and AQI 36.
March is inside the driest and hottest stretch of the Costa Rican year, and our row's 19.7 precipitation days would say otherwise until you read the phrase regulars use: intermittent thunderstorms that do not produce much rain. That is 87.4mm spread across those days, under five millimetres each. Being socked in for days would be strange now; rain is always possible and rarely severe. What the dry season does bring is heat on the coast - 29.6C over a 25.4C night reads as 36C and 30C at 77 percent humidity, and with the Pacific at 29.9C there is nothing cool to get into. Their own figures, high 80s by day and mid 70s at night, match ours closely. The record: 11 hours of sun, a 12.4 kph wind and AQI 38.
Jacó-area forum threads describe August as one of the milder rainy-season months on the Central Pacific coast - the typical pattern is clear mornings, afternoon showers lasting 2-4 hours starting around 4pm, and starry evenings, with more of the day turning wet as the month progresses toward September. One local detail worth knowing: heavy rain washes mud down from the hills, which can turn even normally turquoise water like nearby Playa Blanca temporarily brown. Forum consensus was to schedule outdoor activities for the morning and treat the afternoon rain as background noise rather than a trip-ender, with lush green scenery and thinner crowds as the trade-off.
地図のハコのカードから自分のメモを追加できます。
ハコの気候平年値 — 1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。
1月のハコの混雑
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。
ピークの混雑旅行者がハイシーズンと語る時期、Dry season、Christmas and New Year
旅行者の声より:「…Christmas crowds have gone and prices ease, though it stays high season. A light poncho and a small umbrella cover it. The record:…」 — FiveOfEightHoursAtNight
ピークの混雑混雑ショルダーシーズン閑散
ハコの天気が良い月
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)。
天気が最高ハコ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
1月のハコのイベント
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
Dry season
12月15日〜4月15日 · 例年混雑The rivers drop, the hills behind the town go brown and dusty, and the place runs at capacity from Christmas through to Easter. Weekends are San Jose's as much as anyone's.
- 祝日
Christmas and New Year
12月18日〜1月3日クリスマス・年末年始混雑早めの予約をCosta Rican families take the whole fortnight at the beach and rates roughly double. The town is at its loudest between Christmas and the first week of January. 出典 ↗
近くで開催中のイベント
ハコから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。
ハコはどこにある?
1月のハコ — よくある質問
- 1月はハコを訪れるのに良い時期ですか?
- ハコの1月:猛暑、雨が多い、空気がきれい — 雨の日22日が気にならなければ悪くない時期。SeasonMapの快適スコアでは、ハコの12か月中3位です(85/100)。
- 1月のハコはどんな天気ですか?
- 1月のハコは、平均最高気温28.4°C、最低気温24.4°C、降水量は約120.4 mmで、雨の日はおよそ22.2日です。
- 1月のハコの大気質はどうですか?
- 1月のハコの米国大気質指数(US AQI)は、平均約33です。
300 km圏内:BoqueteのFeria de las Flores y del Cafe(1月7日〜18日)、Bocas del ToroのSurf season(12月1日〜3月31日ごろ)。