Winchester Lake Rainfall Forecast

Today 17 Aug
20%
Mon 18 Aug
15%
Tue 19 Aug
5%
Wed 20 Aug
No Rain
Thu 21 Aug
No Rain
Fri 22 Aug
No Rain
Sat 23 Aug
No Rain

Winchester Lake Rainfall Statistics

August Rainfall

Grangeville - Idaho County Airport (30.4 miles)

Total Rainfall 2025
9.8in
Daily Average 2025
0.04in
Wettest Day 4 February, 2025
0.7in
Wet Days 2025
58/229 (25%)
Total Rainfall July
1.8in
Daily Average July
0.1in
Wettest Day 21 July, 2025
0.6in
Wet Days July
7/31 (23%)
Total Rainfall August
0.2in
Daily Average August
0.02in
Wettest Day 7 August, 2025
0.2in
Wet Days August
2/17 (12%)

Climate (2011–Present)

Grangeville - Idaho County Airport (30.4 miles)

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Annual Average 2020–2024
17.2in
Monthly Average 2020–2025
1.4in
Daily Average 2020–2025
0.05in
Wettest Day 5 May, 2023
3.2in

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