Grantham Rainfall Forecast

Today 27 May
90%
Thu 28 May
5%
Fri 29 May
No Rain
Sat 30 May
5%
Sun 31 May
No Rain
Mon 1 Jun
10%
Tue 2 Jun
20%

Grantham Rainfall Statistics

May Rainfall

Harrisburg, Capital City Airport (8.1 miles)

Total Rainfall 2026
13in
Daily Average 2026
0.1in
Wettest Day 11 March, 2026
1.1in
Wet Days 2026
49/147 (33%)
Total Rainfall April
2.3in
Daily Average April
0.1in
Wettest Day 29 April, 2026
0.7in
Wet Days April
12/30 (40%)
Total Rainfall May
2.5in
Daily Average May
0.1in
Wettest Day 23 May, 2026
0.8in
Wet Days May
12/27 (44%)

Climate (2010–Present)

Harrisburg, Capital City Airport (8.1 miles)

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Annual Average 2021–2025
36.5in
Monthly Average 2021–2026
3.1in
Daily Average 2021–2026
0.1in
Wettest Day 1 September, 2021
5.3in

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