Thompson Island Rainfall Forecast

Today 20 Sep
45%
Mon 21 Sep
60%
Tue 22 Sep
No Rain
Wed 23 Sep
No Rain
Thu 24 Sep
15%
Fri 25 Sep
35%
Sat 26 Sep
40%

Thompson Island Rainfall Statistics

September Rainfall

Rockland, Knox County Regional Airport (15.5 miles)

Total Rainfall 2026
19.9in
Daily Average 2026
0.1in
Wettest Day 23 June, 2026
3.5in
Wet Days 2026
93/263 (35%)
Total Rainfall August
0.4in
Daily Average August
0.01in
Wettest Day 3 August, 2026
0.2in
Wet Days August
9/31 (29%)
Total Rainfall September
1in
Daily Average September
0.1in
Wettest Day 10 September, 2026
0.3in
Wet Days September
7/20 (35%)

Climate (2021–2025)

Rockland, Knox County Regional Airport (15.5 miles)

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Annual Average 2021–2025
23.6in
Monthly Average 2021–2026
2.1in
Daily Average 2021–2026
0.1in
Wettest Day 23 June, 2026
3.5in

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