Lake Clark weather, month by month
- Jul high
- 67°F
- hottest month
- Jan low
- 5°F
- coldest month
- Rain + snowmelt
- 23.6in / yr
- wettest: Sep
- Snowfall
- —in / yr
- rare
- Days ≥ 90°F
- 0/ yr
- Nights ≤ 32°F
- 209/ yr
Port Alsworth 1 SW
Month by month
| Month | High | Low | Rain | Wet days | Sunrise | Sunset | Daylight | Crowds |
|---|---|---|---|---|---|---|---|---|
| Jan | 24° | 5° | 1.6″ | — | 10:07 AM | 4:41 PM | 6h 34m | 0 |
| Feb | 29° | 10° | 1.5″ | — | 8:55 AM | 6:02 PM | 9h 07m | 0 |
| Mar | 32° | 11° | 1.2″ | — | 8:31 AM | 8:15 PM | 11h 44m | 0 |
| Apr | 46° | 24° | 0.9″ | — | 6:56 AM | 9:33 PM | 14h 37m | 0 |
| May | 58° | 32° | 0.8″ | — | 5:32 AM | 10:49 PM | 17h 17m | 7 |
| Jun | 65° | 41° | 1.2″ | — | 4:44 AM | 11:46 PM | 19h 02m | 78 |
| Jul | 67° | 46° | 2.1″ | — | 5:13 AM | 11:28 PM | 18h 15m | 100 |
| Aug | 63° | 45° | 3.3″ | — | 6:26 AM | 10:12 PM | 15h 46m | 87 |
| Sep | 55° | 38° | 3.5″ | — | 7:41 AM | 8:38 PM | 12h 56m | 30 |
| Oct | 42° | 25° | 2.3″ | — | 8:55 AM | 7:05 PM | 10h 11m | 2 |
| Nov | 30° | 15° | 3.0″ | — | 9:15 AM | 4:42 PM | 7h 27m | 0 |
| Dec | 25° | 9° | 2.2″ | — | 10:17 AM | 4:02 PM | 5h 45m | 0 |
Sweet spot: May and September combine average highs between 55°F and 85°F with crowds under 60% of the peak month. Check what is open in those months — quiet can also mean closed roads.
How to read this
These are NOAA’s official 1991–2020 climate normals for one weather station, not a model of the whole park. The station is the one with complete temperature and precipitation normals nearest to a visitor center. Highs and lows are daily averages for the month; “wet days” are days with at least 0.01 inch of precipitation. Mountain parks can be 10–20 °F cooler at their high points than at the station, and the NPS weather page for Lake Clark is the place for current conditions and seasonal closures.
Sunrise and sunset are computed with the NOAA solar equations for the park’s coordinates and shown in America/Anchorage time for the 15th of each month of 2027; they are accurate to about a minute.
Sources · 3
- 1.U.S. Climate Normals 1991–2020 — monthly normals station inventory · National Centers for Environmental Information (NOAA)
- 2.Lake Clark National Park & Preserve — Weather (nps.gov) · National Park Service
- 3.Lake Clark National Park & Preserve — Visitor Use Statistics · National Park Service (IRMA)
FAQ
Lake Clark weather questions
- What is the hottest month at Lake Clark?
- July, with an average high of 67°F and an average low of 46°F at Port Alsworth 1 SW (NOAA 1991–2020 normals). The station averages 0 days a year at or above 90°F.
- How cold does Lake Clark get in winter?
- January is the coldest month, averaging a low of 5°F and a high of 24°F at Port Alsworth 1 SW. About 209 nights a year drop to freezing or below.
- Does it snow at Lake Clark?
- Port Alsworth 1 SW records almost no snowfall (no snow normals). Higher elevations in the park can differ.
- When is the rainy season at Lake Clark?
- September is the wettest month on average (3.5 inches of precipitation at Port Alsworth 1 SW); the station's annual total is 23.6 inches.
- How many hours of daylight does Lake Clark get?
- About 19h 02m on June 15 and 5h 45m on December 15 (sunrise 4:44 AM, sunset 11:46 PM in June; 10:17 AM to 4:02 PM in December, America/Anchorage time).
- What is the best month to visit Lake Clark for weather?
- By NOAA's normals, average highs sit between 55°F and 85°F in May, June, July, August and September. Of those, May and September are also well below the park's peak crowds. Weather in the park varies with elevation; this is the Port Alsworth 1 SW station.
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