Illinois River water temperature
How cold does the Illinois River get? The river gage measuring the Illinois River in Oregon recently added a temperature sensor. The data is so far incomplete as it’s less than a year old, however, the average readings are listed below. For a daily measurement please visit the gage directly at this USGS website. All temperatures are in Fahrenheit and are rounded.
- January: 47 degrees
- February: 46 degrees
- March: 50 degrees
- April: No Data
- May: No Data
- June: No Data
- July: No Data
- August: No Data
- September: No Data
- October: No Data
- November: 50 degrees
- December: 47 degrees
This data table will be checked in six months to update the No Data entries and again every year after as the new average is released.
Average highs and lows at Selma, OR
Taken at Selma, OR the average monthly highs and lows for air temperature are below.
- January: 49° / 34°
- February: 51° / 33°
- March: 54° / 35°
- April: 60° / 38°
- May: 69° / 43°
- June: 77° / 48°
- July: 88° / 54°
- August: 88° / 54°
- September: 80° / 50°
- October: 68° / 43°
- November: 55° / 37°
- December: 47° / 33°