Seattle-Tacoma International Airport Rainfall Forecast

Today 15 Sep
No Rain
Tue 16 Sep
No Rain
Wed 17 Sep
No Rain
Thu 18 Sep
No Rain
Fri 19 Sep
5%
Sat 20 Sep
40%
Sun 21 Sep
45%

Seattle-Tacoma International Airport Rainfall Statistics

September Rainfall

Seattle, Seattle-Tacoma International Airport (0 miles)

Total Rainfall 2025
15.6in
Daily Average 2025
0.1in
Wettest Day 15 March, 2025
0.8in
Wet Days 2025
79/258 (31%)
Total Rainfall August
1.1in
Daily Average August
0.04in
Wettest Day 15 August, 2025
0.8in
Wet Days August
3/31 (10%)
Total Rainfall September
0.1in
Daily Average September
0.01in
Wettest Day 6 September, 2025
0.03in
Wet Days September
3/15 (20%)

Climate (2010–Present)

Seattle, Seattle-Tacoma International Airport (0 miles)

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Annual Average 2020–2024
38.6in
Monthly Average 2020–2025
3.1in
Daily Average 2020–2025
0.1in
Wettest Day 28 February, 2022
3in

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