ラ・フォーチュナ 9月の天気

ラ・フォーチュナの9月:暑い、大雨続き、空気がきれい — 雨の日29日があり、運次第の時期。

2026年9月更新 · ERA5再解析による気候平年値

ラ・フォーチュナLa Fortuna, Costa Rica🇨🇷 コスタリカ · コスタリカ・パナマ · トレッキング57
  1. 751月
  2. 812月
  3. 803月
  4. 764月
  5. 585月
  6. 526月
  7. 617月
  8. 608月
  9. 579月
  10. 5110月
  11. 5611月
  12. 6812月

ラ・フォーチュナでは12か月中9位 · 9月に訪れたい旅行先で1413か所中1182位 · 快適スコア57/100(Dランク)

日中
28°C
21°C
雨の日
29
日照
8 h
湿度
92%
日の長さ
12 h
ラ・フォーチュナ(コスタリカ)
写真: Osmany Mederos · Pexels

9月のラ・フォーチュナについての旅行者の声

La Fortuna-forum threads on September weather confirm this sits within the wettest stretch of the local year, mornings generally the more reliable window before cloud and a real system build through the afternoon. Posters call the Arenal volcano itself genuinely hit-or-miss for visibility, cloud cover and showers frequently obscuring the peak for stretches at a time. Regulars describe humidity as staying close to saturated throughout, laundry famously refusing to fully air out and a warm afternoon feeling considerably heavier than the same reading in a drier month. Posters recommend scheduling hikes for the morning, afternoon plans genuinely riskier. Regulars call the hot springs and waterfalls worth the trip regardless of volcano visibility, both largely unaffected by a passing shower. Posters recommend real rain gear. The record: 27.5C days feeling like a punishing 33C, 21.4C nights, an extraordinarily high 270mm across nearly 29 days and 92 percent humidity.
LaFortunaSeptemberRegular · 9月 · 3日前 · Tripadvisorで続きを読む ↗

ラ・フォーチュナのほかの月

La Fortuna-forum threads on a January visit describe this as genuinely the start of the more favorable season, posters naming it one of the better months for a real shot at seeing the Arenal volcano's peak. Regulars call the summit genuinely elusive regardless of month, several posters naming roughly sixty clear-view days a year as the honest baseline. Posters call fast-drying clothes and rain gear worth packing no matter the month, several regulars naming this standard advice given how much cloud cover varies day to day. Regulars call January still genuinely warm and humid, several threads naming this a real contrast to how the season's reputation sounds. Posters recommend real flexible plans around volcano viewing, several regulars calling this standard given how unpredictable cloud cover remains even in January. The record: 25.7C days, 19.7C nights, 101.7mm across over 15 days and 89 percent humidity.
LaFortunaJanuaryRegular · 1月 · 2日前 · tripadvisor.co.nzで続きを読む ↗
La Fortuna-forum threads on April weather describe conditions as genuinely intense in town, posters citing readings near ninety-five Fahrenheit on the hottest days. Regulars call Arenal National Park itself noticeably cooler, highs there typically running in the upper seventies to low eighties even when La Fortuna proper feels considerably warmer. Posters recommend the La Fortuna Waterfall, the 1968 Park, El Silencio Trail and the Mistico Hanging Bridges as strong April picks, several regulars naming all four in the same itinerary. Regulars recommend a Rio Celeste day tour as a real addition for anyone with an extra day, the drive there considered worthwhile on its own. Posters recommend Don Rufino for a nicer dinner and Soda La Parada for a casual, local option, both named repeatedly across April trip reports. The record: 28.9C days feeling like 33C, 21C nights, an extraordinarily high 58.8mm across over 11 days and 78 percent humidity.
LaFortunaAprilRegular · 4月 · 3日前 · Tripadvisorで続きを読む ↗
La Fortuna-forum threads on mid-July weather describe a familiar daily pattern, posters calling on-and-off showers several times a day standard alongside genuinely hot, humid conditions at midday. Regulars call a heavy afternoon downpour the most likely single event, though some days stay largely sunny throughout with no real disruption. Posters recommend a real umbrella and rain jacket regardless of forecast, conditions here capable of shifting within the hour. Regulars call nearly every tour still running in this weather, zip-lining the main exception when conditions turn genuinely severe. Posters describe July as still worth visiting despite the wetter pattern, the volcano and hot springs both rewarding regardless of a passing shower. Regulars recommend flexible daily plans given how unpredictable the exact timing runs this time of year. The record: 26.6C days feeling like 31C, 21.4C nights, an extraordinarily high 251.2mm across nearly 28 days and 93 percent humidity.
LaFortunaJulyRegular · 7月 · 3日前 · Tripadvisorで続きを読む ↗
La Fortuna-forum threads on whether the wetter season is really that bad are consistent the answer is no, one poster direct nobody can reliably predict exactly when a shower hits, beyond March running noticeably calmer than the rest of the year. Regulars describe a typical June day as clear through the morning, with heavier activity building through afternoon and evening before clearing again, most operators running tours on a morning schedule to work around this pattern. Posters call waterfall visits and nature walks genuinely excellent in June, the surrounding rainforest at its greenest, with hotel and tour prices noticeably lower than peak season. A poncho and fast-drying clothing are standing advice regardless of forecast. Regulars call June entirely workable for a first-time visitor willing to plan mornings around outdoor activities. The record: 27.3C days feeling like a punishing 32C, 21.7C nights, an extraordinarily high 258mm across 29 days and 93 percent humidity.
LaFortunaJuneRegular · 6月 · 3日前 · Tripadvisorで続きを読む ↗

地図のラ・フォーチュナのカードから自分のメモを追加できます。

ラ・フォーチュナの気候平年値 — 9月

日中の最高気温28°C / 82°F🥵 暑い
夜の最低気温21°C / 71°F
体感温度(最高)33°C / 91°F
降水量270 mm / 10.6 in⛈ 大雨続き
雨の日数29日
湿度92%💦 非常に多湿
露点22°C / 72°F
日照8時間/日
日の長さ12.2時間
9 km/h / 6 mph
大気質(US AQI)17🍃 良好

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。

9月のラ・フォーチュナの混雑

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。

ショルダーシーズン主な訪問国のうち2か国で学校休暇、天気は平年並みの月(推定)

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ピークの混雑混雑ショルダーシーズン閑散

ラ・フォーチュナの天気が良い月

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)。

天気はまずまずラ・フォーチュナの天気がピークを迎えるのは2月〜4月です。

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天気が最高天気はまずまず天気が厳しい

9月のラ・フォーチュナのイベント

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。

  • 季節

    Green season

    5月1日〜11月30日 · 例年モンスーン

    Rain most afternoons, rates down, waterfalls at full noise. Arenal makes its own cloud, so the volcano is a lottery in these months whatever the forecast for the town says.

  • 季節

    Rivers at full flow

    9月1日〜11月15日 · 例年増水期リスク

    The Balsa and the Toro run hardest in September and October and the rafting grades go up with them. After a heavy night the Rio Celeste loses its blue for a day or two, which catches people out.

  • 季節

    Wet season

    モンスーンリスク

    29 rainy days and about 270 mm in the month — the real kind of rainy season, not afternoon showers.

    気候の平年値から算出

9月の世界のイベント →

近くで開催中のイベント

ラ・フォーチュナから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。

ラ・フォーチュナはどこにある?

地図を読み込み中…

9月のラ・フォーチュナ — よくある質問

9月はラ・フォーチュナを訪れるのに良い時期ですか?
ラ・フォーチュナの9月:暑い、大雨続き、空気がきれい — 雨の日29日があり、運次第の時期。SeasonMapの快適スコアでは、ラ・フォーチュナの12か月中9位です(57/100)。
9月のラ・フォーチュナはどんな天気ですか?
9月のラ・フォーチュナは、平均最高気温27.5°C、最低気温21.4°C、降水量は約270.1 mmで、雨の日はおよそ28.7日です。
9月のラ・フォーチュナの大気質はどうですか?
9月のラ・フォーチュナの米国大気質指数(US AQI)は、平均約17です。

300 km圏内:JacóのHumpback whales(7月15日〜11月15日ごろ)、NosaraのArribada at Ostional(7月1日〜12月31日ごろ)。

ラ・フォーチュナ 9月の天気:28°C、雨の日29日、日照8時間 | SeasonMap