Black Rock Rainfall Forecast

Today 23 Sep
No Rain
Thu 24 Sep
No Rain
Fri 25 Sep
60%
Sat 26 Sep
75%
Sun 27 Sep
75%
Mon 28 Sep
30%
Tue 29 Sep
5%

Black Rock Rainfall Statistics

September Rainfall

Groton / New London, Groton / New London Airport (1.2 miles)

Total Rainfall 2026
27.9in
Daily Average 2026
0.1in
Wettest Day 23 June, 2026
2.4in
Wet Days 2026
87/266 (33%)
Total Rainfall August
4.9in
Daily Average August
0.2in
Wettest Day 3 August, 2026
2.3in
Wet Days August
12/31 (39%)
Total Rainfall September
2.6in
Daily Average September
0.1in
Wettest Day 13 September, 2026
1.7in
Wet Days September
7/23 (30%)

Climate (2021–2025)

Groton / New London, Groton / New London Airport (1.2 miles)

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Annual Average 2021–2025
37.8in
Monthly Average 2021–2026
3.2in
Daily Average 2021–2026
0.1in
Wettest Day 11 December, 2024
3in

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