Columbia River - Knapp Landing Rainfall Forecast
- 100%
- 85%
- 100%
- 90%
- 60%
- 80%
- 65%
Columbia River - Knapp Landing Rainfall Statistics
December Rainfall
Scappoose Industrial Airpark (5.6 miles)
Total Rainfall December
4.4inDaily Average December
0.3inWettest Day 8 December, 2025
1.4inWet Days December
10/16 (63%)
Climate (2010–Present)
Scappoose Industrial Airpark (5.6 miles)
Annual Average 2020–2024
36.7inMonthly Average 2020–2025
3inDaily Average 2020–2025
0.1inWettest Day 4 November, 2022
3.1in