Flat Mountain Arm Rainfall Forecast

Today 14 Dec
No Rain
Mon 15 Dec
15%
Tue 16 Dec
65%
Wed 17 Dec
100%
Thu 18 Dec
85%
Fri 19 Dec
85%
Sat 20 Dec
50%

Flat Mountain Arm Rainfall Statistics

December Rainfall

Yellowstone Lake (11.2 miles)

Total Rainfall 2025
17.8in
Daily Average 2025
0.1in
Wettest Day 4 October, 2025
0.8in
Wet Days 2025
118/348 (34%)
Total Rainfall November
1.1in
Daily Average November
0.04in
Wettest Day 4 November, 2025
0.2in
Wet Days November
12/30 (40%)
Total Rainfall December
1in
Daily Average December
0.1in
Wettest Day 5 December, 2025
0.3in
Wet Days December
9/14 (64%)

Climate (2010–Present)

Yellowstone Lake (11.2 miles)

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Annual Average 2020–2024
21.7in
Monthly Average 2020–2025
1.8in
Daily Average 2020–2025
0.1in
Wettest Day 21 September, 2023
1.2in

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