Mattawa Rainfall Forecast

Today 19 Sep
No Rain
Sun 20 Sep
No Rain
Mon 21 Sep
No Rain
Tue 22 Sep
No Rain
Wed 23 Sep
No Rain
Thu 24 Sep
10%
Fri 25 Sep
5%

Mattawa Rainfall Statistics

September Rainfall

Sunnyside Municipal Airport (28.6 miles)

Total Rainfall 2026
8.9in
Daily Average 2026
0.1in
Wettest Day 9 August, 2026
3.3in
Wet Days 2026
26/262 (10%)
Total Rainfall August
3.6in
Daily Average August
0.1in
Wettest Day 9 August, 2026
3.3in
Wet Days August
2/31 (6%)
Total Rainfall September
2in
Daily Average September
0.1in
Wettest Day 12 September, 2026
0.8in
Wet Days September
5/19 (26%)

Climate (2021–2025)

Sunnyside Municipal Airport (28.6 miles)

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Annual Average 2021–2025
21.3in
Monthly Average 2021–2026
2in
Daily Average 2021–2026
0.1in
Wettest Day 7 June, 2023
3.6in

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