Weather on May 18 at Theodore Roosevelt
Theodore Roosevelt National Park
Based on 54 years of data from Medora, ND
Elevation Note: Theodore Roosevelt sits at 2,600 ft. Expect temperatures 9°F cooler than the data shown below, which comes from Medora, ND at a lower elevation.
Planning Your Visit
May 18th in Theodore Roosevelt National Park (via Medora, ND) typically brings pleasant spring weather, with average highs around 72°F and lows near 42°F — a 30°F daily swing. Over 54 years of records, the warmest May 18th was in 1972 (74°F average), while the coldest was 2015 (37°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 35% of May 18th dates historically, with the wettest May 18th recording 3.71" of rain. The last decade has been 4.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.9°F cooler on this date compared to 20-30 years ago.
Planning for May 18th in Theodore Roosevelt? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 61°F | 37°F | 0.03" | 0" |
| 2024 | 64°F | 43°F | 0" | -- |
| 2023 | 64°F | 43°F | 0.08" | -- |
| 2022 | 79°F | 43°F | 0" | 0" |
| 2021 | 82°F | 52°F | 0" | -- |
| 2020 | 73°F | 48°F | 0" | 0" |
| 2019 | 42°F | 32°F | 3.71" | 0" |
| 2018 | 53°F | 43°F | 0.83" | -- |
| 2017 | 57°F | 33°F | 0" | 0" |
| 2016 | 74°F | 33°F | 0" | -- |
| 2015 | 46°F | 28°F | 0.08" | -- |
| 2014 | 72°F | 45°F | 0.18" | -- |
| 2013 | 72°F | 53°F | 0.3" | -- |
| 2012 | 84°F | 55°F | 0.13" | -- |
| 2011 | 62°F | 51°F | 0" | -- |
| 2010 | 77°F | 52°F | 0" | 0" |
| 2009 | 78°F | 42°F | 0" | 0" |
| 2008 | 78°F | 40°F | 0" | 0" |
| 2007 | 83°F | 49°F | 0" | 0" |
| 2006 | 88°F | 50°F | 0" | 0" |
| 2005 | 66°F | 51°F | 1.71" | -- |
| 2004 | 69°F | 50°F | 0" | 0" |
| 2003 | 59°F | 37°F | -- | -- |
| 2002 | 64°F | 34°F | -- | -- |
| 2001 | 76°F | 38°F | 0.51" | 0" |
| 2000 | 69°F | 39°F | 0" | 0" |
| 1999 | 75°F | 52°F | 0" | 0" |
| 1998 | 86°F | 43°F | 0" | 0" |
| 1997 | 83°F | 44°F | 0.05" | 0" |
| 1996 | 75°F | 45°F | 0.05" | 0" |
| 1995 | 73°F | 41°F | 0" | 0" |
| 1994 | 83°F | 52°F | 0" | 0" |
| 1993 | 64°F | 30°F | 0" | 0" |
| 1992 | 94°F | 48°F | 0" | 0" |
| 1991 | 73°F | 47°F | 0" | 0" |
| 1990 | 67°F | 41°F | 0.05" | 0" |
| 1989 | 83°F | 39°F | 0" | 0" |
| 1988 | 90°F | 51°F | 0.18" | 0" |
| 1987 | 52°F | 45°F | 0.13" | 0" |
| 1986 | 74°F | 48°F | 0" | 0" |
| 1985 | 83°F | 38°F | 0" | 0" |
| 1984 | 74°F | 34°F | 0" | 0" |
| 1983 | 70°F | 41°F | 0" | 0" |
| 1982 | 71°F | 32°F | 0" | 0" |
| 1981 | 69°F | 35°F | 0" | 0" |
| 1980 | 81°F | 31°F | 0" | 0" |
| 1979 | 70°F | 31°F | 0.15" | 0" |
| 1977 | 78°F | 49°F | 0.23" | 0" |
| 1976 | 81°F | 37°F | 0" | 0" |
| 1975 | 80°F | 40°F | 0" | 0" |
| 1974 | 53°F | 47°F | 0" | 0" |
| 1973 | 85°F | 39°F | 0.18" | 0" |
| 1972 | 89°F | 59°F | 0" | 0" |
| 1971 | 56°F | 33°F | 0.15" | 0" |