Lake Hennessey Rainfall Forecast

Today 8 May
No Rain
Sat 9 May
No Rain
Sun 10 May
No Rain
Mon 11 May
No Rain
Tue 12 May
No Rain
Wed 13 May
5%
Thu 14 May
5%

Lake Hennessey Rainfall Statistics

May Rainfall

Napa, Napa County Airport (19.9 miles)

Total Rainfall 2026
9.3in
Daily Average 2026
0.1in
Wettest Day 16 February, 2026
1.1in
Wet Days 2026
30/128 (23%)
Total Rainfall April
3.5in
Daily Average April
0.1in
Wettest Day 20 April, 2026
0.8in
Wet Days April
8/30 (27%)
Total Rainfall May
0.4in
Daily Average May
0.1in
Wettest Day 4 May, 2026
0.3in
Wet Days May
2/8 (25%)

Climate (2010–Present)

Napa, Napa County Airport (19.9 miles)

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Annual Average 2021–2025
19.9in
Monthly Average 2021–2026
1.7in
Daily Average 2021–2026
0.1in
Wettest Day 24 October, 2021
4.8in

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