Katmai weather, month by month
- Jul high
- 65°F
- hottest month
- Jan low
- 10°F
- coldest month
- Rain + snowmelt
- 21.4in / yr
- wettest: Sep
- Snowfall
- 47.4in / yr
- Oct–Apr
- Days ≥ 90°F
- 0/ yr
- Nights ≤ 32°F
- 192/ yr
King Salmon
Month by month
| Month | High | Low | Rain | Snow | Wet days | Sunrise | Sunset | Daylight | Crowds |
|---|---|---|---|---|---|---|---|---|---|
| Jan | 24° | 10° | 0.9″ | 8.6″ | 10 | 9:58 AM | 5:01 PM | 7h 03m | 0 |
| Feb | 30° | 15° | 0.9″ | 7.2″ | 10 | 8:54 AM | 6:15 PM | 9h 21m | 0 |
| Mar | 32° | 15° | 0.8″ | 7.2″ | 9 | 8:36 AM | 8:22 PM | 11h 45m | 0 |
| Apr | 45° | 28° | 1.0″ | 4.4″ | 11 | 7:08 AM | 9:33 PM | 14h 25m | 0 |
| May | 55° | 36° | 1.4″ | 0.6″ | 12 | 5:52 AM | 10:41 PM | 16h 49m | 1 |
| Jun | 62° | 44° | 1.8″ | — | 14 | 5:11 AM | 11:30 PM | 18h 20m | 34 |
| Jul | 65° | 49° | 2.5″ | — | 16 | 5:36 AM | 11:16 PM | 17h 40m | 100 |
| Aug | 63° | 48° | 3.3″ | — | 17 | 6:41 AM | 10:09 PM | 15h 28m | 79 |
| Sep | 56° | 41° | 3.4″ | — | 18 | 7:49 AM | 8:42 PM | 12h 52m | 44 |
| Oct | 44° | 29° | 2.3″ | 2.5″ | 15 | 8:56 AM | 7:16 PM | 10h 19m | 2 |
| Nov | 32° | 18° | 1.7″ | 6.7″ | 13 | 9:10 AM | 5:00 PM | 7h 50m | 0 |
| Dec | 26° | 11° | 1.4″ | 10.2″ | 13 | 10:05 AM | 4:25 PM | 6h 21m | 0 |
Sweet spot: May, June 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 Katmai 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.Katmai National Park & Preserve — Weather (nps.gov) · National Park Service
- 3.Katmai National Park & Preserve — Visitor Use Statistics · National Park Service (IRMA)
FAQ
Katmai weather questions
- What is the hottest month at Katmai?
- July, with an average high of 65°F and an average low of 49°F at King Salmon (NOAA 1991–2020 normals).
- How cold does Katmai get in winter?
- January is the coldest month, averaging a low of 10°F and a high of 24°F at King Salmon. About 192 nights a year drop to freezing or below.
- Does it snow at Katmai?
- Yes. King Salmon averages 47.4 inches of snow a year, mostly in January, February, March, April, October, November and December. Higher ground in the park gets more.
- When is the rainy season at Katmai?
- September is the wettest month on average (3.4 inches of precipitation at King Salmon); the station's annual total is 21.4 inches.
- How many hours of daylight does Katmai get?
- About 18h 20m on June 15 and 6h 21m on December 15 (sunrise 5:11 AM, sunset 11:30 PM in June; 10:05 AM to 4:25 PM in December, America/Anchorage time).
- What is the best month to visit Katmai 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, June and September are also well below the park's peak crowds. Weather in the park varies with elevation; this is the King Salmon station.
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