Best time to visit Lewis and Clark National Historical Park
April, May and September are the best balance at Lewis and Clark National Historical Park: mild and dry for the park (average highs 55° to 66°F), with crowds from moderate to busy. July is busiest, with about 41,000 visitors. February is the quietest, with highs near 50°F.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
Month by month
- Station
- Long Beach Exp Stn, WA USC00454748
- Lat / lon
- 46.37, -124.04
- Elevation
- 25 ft
- From park center
- 5.7 mi
- Normals
- 1991–2020
- Visits
- 2023–2025
| Field | Jan | Feb | Mar | Aprbest | Maybest | Jun | Jul | Aug | Sepbest | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High, °F | 49° | 50° | 52° | 55° | 59° | 62° | 65° | 67° | 66° | 60° | 53° | 48° | 57° |
| Low, °F | 36° | 35° | 37° | 40° | 45° | 49° | 52° | 52° | 48° | 42° | 38° | 36° | 43° |
| Precipitation, in | 12.0 | 7.8 | 8.7 | 6.8 | 3.5 | 2.6 | 1.0 | 1.6 | 2.7 | 8.2 | 11.4 | 12.2 | 78.5 |
| Snow, in | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Daylight, h:mm | 8:59 | 10:15 | 11:45 | 13:29 | 14:57 | 15:46 | 15:27 | 14:10 | 12:29 | 10:49 | 9:21 | 8:37 | |
| Visitors, thousands | 10 | 9 | 17 | 21 | 26 | 34 | 41 | 38 | 27 | 20 | 11 | 10 | 265 |
| Crowds | Quiet | Quiet | Moderate | Moderate | Busy | Very busy | Very busy | Very busy | Busy | Moderate | Quiet | Quiet | |
| Weather | Cool | Cool | Cool | Mild | Mild | Mild | Mild | Mild | Mild | Mild, wet | Cool | Cool |
| Month | High °F | Low °F | Precip., in | Snow, in | Daylight | Visitors | Crowds | Weather |
|---|---|---|---|---|---|---|---|---|
| January | 49° | 36° | 12.0 | 0 | 8:59 | 10,000 | Quiet | Cool |
| February | 50° | 35° | 7.8 | 0 | 10:15 | 9,500 | Quiet | Cool |
| March | 52° | 37° | 8.7 | 0 | 11:45 | 17,000 | Moderate | Cool |
| Aprilbest | 55° | 40° | 6.8 | 0 | 13:29 | 21,000 | Moderate | Mild |
| Maybest | 59° | 45° | 3.5 | 0 | 14:57 | 26,000 | Busy | Mild |
| June | 62° | 49° | 2.6 | 0 | 15:46 | 34,000 | Very busy | Mild |
| July | 65° | 52° | 1.0 | 0 | 15:27 | 41,000 | Very busy | Mild |
| August | 67° | 52° | 1.6 | 0 | 14:10 | 38,000 | Very busy | Mild |
| Septemberbest | 66° | 48° | 2.7 | 0 | 12:29 | 27,000 | Busy | Mild |
| October | 60° | 42° | 8.2 | 0 | 10:49 | 20,000 | Moderate | Mild, wet |
| November | 53° | 38° | 11.4 | 0 | 9:21 | 11,000 | Quiet | Cool |
| December | 48° | 36° | 12.2 | 0 | 8:37 | 10,000 | Quiet | Cool |
| Year | 57° | 43° | 78.5 | 0 | 265,000 | |||
Year: average high and low, total precipitation and snowfall, total visitors. T = trace (under 0.05 in). – = not measured at this station. Updated .
- Hottest August, average high 67°F
- Coldest nights February, average low 35°F
- Source NOAA National Centers for Environmental Information; National Park Service
- Visitors a year about 265,000 (2023–2025 average)
- State Oregon
Closures, reservations and alerts: Lewis and Clark National Historical Park on nps.gov
Nearby
- Fort Vancouver National Historic SiteBest: Apr, Jun and Sep · Washington
- Olympic National ParkBest: Apr, May and Jun · Washington
- Mount Rainier National ParkBest: Jul, Aug and Sep · Washington
- San Juan Island National Historical ParkBest: Jun, Aug and Sep · Washington