McMahan Rainfall Forecast

Today 20 May
90%
Thu 21 May
75%
Fri 22 May
50%
Sat 23 May
75%
Sun 24 May
80%
Mon 25 May
55%
Tue 26 May
45%

McMahan Rainfall Statistics

May Rainfall

San Marcos, San Marcos Municipal Airport (20.5 miles)

Total Rainfall 2026
9.4in
Daily Average 2026
0.1in
Wettest Day 4 April, 2026
2in
Wet Days 2026
26/140 (19%)
Total Rainfall April
6.1in
Daily Average April
0.2in
Wettest Day 4 April, 2026
2in
Wet Days April
11/30 (37%)
Total Rainfall May
1.4in
Daily Average May
0.1in
Wettest Day 1 May, 2026
1.1in
Wet Days May
4/20 (20%)

Climate (2010–Present)

San Marcos, San Marcos Municipal Airport (20.5 miles)

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Annual Average 2021–2025
15.4in
Monthly Average 2021–2026
1.4in
Daily Average 2021–2026
0.05in
Wettest Day 6 April, 2023
2.8in

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