Lake Clark National Park weather in September
September in Lake Clark National Park: cold, soaked, with clean air — a good time to visit.
#5 of 12 months in Lake Clark National Park · #442 of 604 destinations to visit in September · comfort 68/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Lake Clark National Park climate normals — September
| Daytime high | 4°C / 40°F | 🧥 cold |
|---|---|---|
| Nighttime low | -1°C / 30°F | |
| Feels like (high) | 1°C / 34°F | |
| Rainfall | 164 mm / 6.5 in | ⛈ soaked |
| Rainy days | 19 days | |
| Humidity | 88% | 💦 very humid |
| Dew point | -1°C / 30°F | |
| Sunshine | 6.4 h/day | |
| Daylight | 12.9 h | |
| Wind | 9 km/h / 5 mph | |
| Snowfall | 24.5 cm / 9.6 in | |
| Air quality (US AQI) | 24 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Lake Clark National Park?
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Lake Clark National Park in September — FAQ
- Is September a good time to visit Lake Clark National Park?
- September in Lake Clark National Park: cold, soaked, with clean air — a good time to visit. It ranks #5 of 12 months for Lake Clark National Park on SeasonMap's comfort score (68/100).
- What is the weather like in Lake Clark National Park in September?
- In September, Lake Clark National Park averages a daily high of 4.2°C and a low of -0.9°C, with about 164.4 mm of rain over roughly 18.8 rainy days.
- What is the air quality in Lake Clark National Park in September?
- Lake Clark National Park has a mean US Air Quality Index of about 24 in September.
- Does it snow in Lake Clark National Park in September?
- Lake Clark National Park sees roughly 24.5 cm of snowfall in September.