Issaquah 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
35%
Sun 21 Sep
40%

Issaquah Rainfall Statistics

September Rainfall

Renton Municipal Airport (8.7 miles)

Total Rainfall 2025
4.4in
Daily Average 2025
0.02in
Wettest Day 20 April, 2025
0.6in
Wet Days 2025
45/258 (17%)
Total Rainfall August
0.4in
Daily Average August
0.01in
Wettest Day 15 August, 2025
0.2in
Wet Days August
3/31 (10%)
Total Rainfall September
0.01in
Daily Average September
0in
Wettest Day 7 September, 2025
0.01in
Wet Days September
1/15 (7%)

Climate (2010–Present)

Renton Municipal Airport (8.7 miles)

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Annual Average 2020–2024
17.3in
Monthly Average 2020–2025
1.4in
Daily Average 2020–2025
0.05in
Wettest Day 28 October, 2021
1.5in

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