East Sister Rainfall Forecast

Today 18 Sep
95%
Sat 19 Sep
No Rain
Sun 20 Sep
75%
Mon 21 Sep
65%
Tue 22 Sep
20%
Wed 23 Sep
10%
Thu 24 Sep
30%

East Sister Rainfall Statistics

September Rainfall

Pease Air Force Base / Portsmouth (7.5 miles)

Total Rainfall 2026
18.9in
Daily Average 2026
0.1in
Wettest Day 30 May, 2026
1.6in
Wet Days 2026
93/261 (36%)
Total Rainfall August
1.9in
Daily Average August
0.1in
Wettest Day 3 August, 2026
1.4in
Wet Days August
5/31 (16%)
Total Rainfall September
1.3in
Daily Average September
0.1in
Wettest Day 13 September, 2026
0.6in
Wet Days September
8/18 (44%)

Climate (2021–2025)

Pease Air Force Base / Portsmouth (7.5 miles)

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Annual Average 2021–2025
36in
Monthly Average 2021–2026
2.9in
Daily Average 2021–2026
0.1in
Wettest Day 18 September, 2023
2.9in

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