Groton Rainfall Forecast

Today 15 May
25%
Sat 16 May
No Rain
Sun 17 May
15%
Mon 18 May
5%
Tue 19 May
5%
Wed 20 May
35%
Thu 21 May
35%

Groton Rainfall Statistics

May Rainfall

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

Total Rainfall 2026
8.3in
Daily Average 2026
0.1in
Wettest Day 25 January, 2026
1in
Wet Days 2026
46/135 (34%)
Total Rainfall April
1.2in
Daily Average April
0.04in
Wettest Day 17 April, 2026
0.3in
Wet Days April
7/30 (23%)
Total Rainfall May
1in
Daily Average May
0.1in
Wettest Day 9 May, 2026
0.5in
Wet Days May
3/15 (20%)

Climate (2010–Present)

Fitchburg, Fitchburg Municipal Airport (9.9 miles)

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Annual Average 2021–2025
43.2in
Monthly Average 2021–2026
3.5in
Daily Average 2021–2026
0.1in
Wettest Day 11 September, 2023
5.1in

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