クレーターレイク国立公園の月別の天気

Crater Lake-forum threads on a January visit describe Rim Drive and the north entrance as genuinely closed for the season, posters naming Rim Village as the only real place to view the lake this time of year. Regulars call the west and south entrances genuinely plowed daily and open year-round, several posters naming this the standard way in during winter. Posters call even the Rim Village road capable of closing in heavy snow, several regulars naming chains as standard equipment for anyone driving up in January. Regulars call roughly forty feet of snow a year genuinely typical here, several threads naming this the reason so much of the park stays inaccessible without snowshoes. Posters recommend checking current road status before a January trip, several regulars calling this standard given how quickly conditions can close even the plowed sections. The record: 1.5C days, -5.8C nights, an extraordinarily high 259.1mm across 17 days and 84 percent humidity.

Crater Lake-forum threads on winter visits describe February as one of the best times of year here for anyone equipped for it - deep snowpack against the lake's intense blue is repeatedly called breathtaking, a scene regulars rate above the summer version of the park. The south entrance road to Rim Village stays open year-round when conditions allow, though tire chains are standard advice and getting around on foot generally means snowshoes over regular boots. The lodge is closed for the season and boat tours ended months earlier, so a February visit centers on ranger-led snowshoe walks and the rim view rather than lake-level activities. Posters are candid the payoff depends entirely on the sky clearing - a socked-in, cloudy day can hide the lake completely, so checking conditions before the drive is standing advice. The record: 1.1C days feeling like -3C, -6.9C nights, an extraordinarily high 227.1cm of fresh snowfall and 81 percent humidity.

June at Crater Lake is an access question before it is a weather one. The forum's timeline: the North Entrance normally opens mid-to-late June, the East Rim Drive usually not until late June or early July, and in heavy-snow years not until mid-to-late July. The South Entrance up to Rim Village stays open except during storms, so you can always reach a view of the lake — weather permitting, since it can be socked in with cloud. The record still shows snowfall in June, with only 19°C by day and 5°C nights. Regulars warn plainly that early June may disappoint on road closures, and that June snowstorms here are not unusual. Check the park site and TripCheck before committing.

Crater Lake-forum threads naming the best time to visit call August the park's most stable stretch of the year, warm afternoons, genuinely low precipitation and clear rim views the norm. Posters describe evenings and early mornings as noticeably cooler at this elevation, a real jacket worth having for sunrise viewpoints or an early start on the rim trail. Campsites are called quick to fill by midday given the popularity of the season, though one poster visiting in early August found the park surprisingly uncrowded despite that reputation. A couple of the smaller waterfall trails run essentially empty of water by August, dependent on earlier meltwater rather than the season's own accumulation, so posters recommend checking current status before planning around them. Sunscreen and a hat are called essential given the elevation and clear skies. The record: 22.3C days feeling like 22C, 8.3C nights, a very low 50 percent humidity and 13.3 hours of sun.

Crater Lake-forum threads on September weather describe this as genuinely one of the strongest months for dry, comfortable conditions, daytime readings typically in the high sixties Fahrenheit though posters note the range can run from the forties to the eighties. Regulars call nighttime lows regularly dropping to around forty Fahrenheit, some nights genuinely dropping toward freezing even in a favorable stretch. Posters describe September as capable of turning beautiful, often called the most scenic month, though conditions can shift by mid-month with most facilities winding down by early October. Regulars recommend late September as generally fine, though posters flag a real caution, one visitor describing getting caught in an unexpected system during a past September's second week. Posters recommend a current forecast rather than assuming based on the calendar. The record: 17.4C days feeling like 15C, 4.7C nights, a notably high 2.3cm of fresh accumulation and 58 percent humidity.

Crater Lake-forum threads on October weather describe the month as genuinely transitional, posters calling the first half often still pleasant, t-shirt weather by day with just a light layer needed once the sun drops. Regulars call the back half of the month a different story entirely, winter conditions typically setting in with real snowfall common by late October. Posters describe the lodge as closing for the season around mid-month, boat tours and the trolley having already wrapped up back in September. Regulars recommend checking current road and facility status directly before planning a visit this late in the month, conditions capable of shifting within days. Posters call the lake itself worth the trip regardless of exact timing, the rim views striking under October's clearer, quieter skies. Regulars recommend real layers for the genuinely cold evenings at this elevation. The record: 10.5C days feeling like 7C, 0.1C nights, 137.2mm across over 10 days and 69 percent humidity.

Crater Lake-forum threads on a November visit describe the north entrance as typically closed by early in the month, posters calling the south entrance the only realistic access point through the rest of autumn and into winter. Regulars call tire chains a real possibility depending on conditions, a genuine complication for anyone in a rental car since chains often aren't permitted on them. Regulars call Rim Drive closed by November, the lake itself still viewable from accessible overlooks despite the more limited access. Posters call both in-park lodges closed for the season by this point, Klamath Falls or Fort Klamath the practical nearby options instead. Regulars recommend checking current road conditions directly before a November trip, forecasts here considered genuinely unreliable this late in the year. The record: 4.9C days feeling like 3C, -3.3C nights, an extraordinarily high 193.3mm across over 13 days and 78 percent humidity.

Forum posters are direct that December brings very cold temperatures and near-certain snow, with the park averaging around 40 feet of snow annually. Posters warn that even when the south entrance stays open (as it does year-round when conditions allow), visitors should expect ice, freezing fog and black ice at the higher elevations, and that even a successful entry doesn't guarantee actually seeing the lake if fog or cloud rolls in. Posters consistently recommend checking tripcheck.com for current road conditions before setting out, and are firm that tire chains are often mandatory - a 4WD vehicle does not exempt you from carrying and using them, and most rental companies won't permit chains on their cars in the first place. Posters generally rate December as genuinely difficult and weather-dependent for Crater Lake, a real go/no-go decision that should be made based on same-day conditions rather than planned in advance.