John Day Dam



Water barrier or embankment built across the course of a stream or into a body of water to control and (or) impound the flow of water.
See also: Locales, Parks, and Reserves
man-made Icon Man-made
Map Marker

GPS Coordinates

Latitude, Longitude:
45.7156942°, -120.6927238°
Elevation Icon


266 ft. (81 m.)

Topographic Map

US Topo Map

The USGS (U.S. Geological Survey) publishes a set of the most commonly used topographic maps of the U.S. called US Topo that are separated into rectangular quadrants that are printed at 22.75"x29" or larger. John Day Dam is covered by the Rufus, OR US Topo Map quadrant

Free US Topo Map PDF Order Waterproof Printed Topo Map
Water Icon Water
Land Icon Land
Man-made Icon Man-made

Nearby Dams

John Day Dam 0.1 mi

Nearby Cities

Nearby Points of Interest

John Day Dam Fish Ladder Man-made 0.3 mi
Lower John Day Rapids (historical) Water 0.3 mi
Helm Canyon Land 0.5 mi
Schofield Rapids (historical) Water 0.5 mi
Day (historical) Man-made 0.6 mi

Historical Weather

Below are weather averages from 1971 to 2000 according to data gathered from the nearest official weather station. The nearest weather station for both precipitation and temperature measurements is M which is approximately 16 miles away and has an elevation of 1,870 feet (1,604 feet higher than John Day Dam). Because the nearest station and this geographic feature may have differences in elevation and topography, the historic weather at the two separate locations may be different as well.

Average Daily Temperatures by Month (°F)

Average Monthly Precipitation (in inches)

Month Precip AVG High Temp AVG Low Temp
January 1.57" 38.3° 24.7°
February 1.14" 43.4° 27.6°
March 1.09" 51.2° 31.7°
April .88" 58.0° 35.6°
May .89" 65.6° 41.5°
June .62" 73.2° 47.4°
July .31" 81.6° 53.0°
August .38" 81.8° 52.6°
September .52" 73.8° 44.8°
October .85" 61.9° 36.6°
November 1.64" 46.7° 30.8°
December 1.54" 38.5° 25.5°

Summer High Temps

This location's average summer high temps are lower than 78% of other locations on record.

Winter Low Temps

This location's average winter low temps are higher than 66% of other locations on record.

Precipitation Levels

This location's average precipitation levels are lower than 93% of other locations on record.