Weather on May 20 at Katmai
Katmai National Park and Preserve
AKAlaska200 ft elevation
Avg High59°F
Avg Low42°F
Warmest200261°F
Coldest197140°F
Based on 31 years of data from Anchorage, AK
Planning Your Visit
May 20th in Katmai National Park (via Anchorage, AK) typically brings cool spring weather, with average highs around 59°F and lows near 42°F. Over 31 years of records, the warmest May 20th was in 2002 (61°F average), while the coldest was 1971 (40°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 13% of May 20th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 20th in Katmai? Bring layers as temperatures can vary throughout the day.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 54°F | 44°F | 0" | -- |
| 2024 | 58°F | 45°F | 0" | -- |
| 2023 | 59°F | 48°F | 0" | -- |
| 2022 | 71°F | 43°F | 0" | -- |
| 2021 | 52°F | 44°F | 0" | -- |
| 2020 | 65°F | 48°F | 0" | -- |
| 2019 | 58°F | 46°F | 0" | -- |
| 2018 | 55°F | 44°F | 0" | -- |
| 2017 | 58°F | 43°F | 0" | -- |
| 2016 | 60°F | 49°F | 0.46" | -- |
| 2015 | 60°F | 39°F | 0" | -- |
| 2014 | 65°F | 39°F | 0" | -- |
| 2013 | 53°F | 31°F | 0" | -- |
| 2012 | 56°F | 45°F | 0" | -- |
| 2011 | 62°F | 46°F | 0" | -- |
| 2010 | 62°F | 43°F | 0" | -- |
| 2009 | 57°F | 36°F | 0" | -- |
| 2008 | 64°F | 42°F | 0" | -- |
| 2007 | 63°F | 42°F | 0" | -- |
| 2006 | 50°F | 42°F | 0.05" | -- |
| 2005 | 64°F | 50°F | 0" | -- |
| 2004 | 66°F | 42°F | 0" | -- |
| 2003 | 60°F | 38°F | 0" | -- |
| 2002 | 75°F | 47°F | 0" | 0" |
| 2001 | 62°F | 42°F | 0" | -- |
| 2000 | 54°F | 41°F | 0.05" | -- |
| 1999 | 59°F | 41°F | 0" | 0" |
| 1998 | 53°F | 40°F | 0" | 0" |
| 1973 | 53°F | 39°F | 0" | 0" |
| 1972 | 52°F | 35°F | 0.38" | 0" |
| 1971 | 52°F | 29°F | 0" | 0" |
May 20 at Nearby Parks
Holiday Weather at Katmai
Official NPS WebsiteVisit nps.gov/katm for park information, alerts, and reservations
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