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Rainfall

Although here in Tucson we live in the desert, we know that when it rains it pours- especially during monsoon season. Below are two charts. The first shows the average rainfall in Southern Arizona and how many gallons of rainwater per month that can be collected from a 1000sq. ft. home. As you can see, a 1000 sq ft. home collects an astounding average of 7800 gallons of water a year with rainwater harvesting. The second chart shows the amount of water your home can collect based on the amount of rainfall and square footgage of your home. For example, a 2000 sq. ft. home collects about 1247 gallons of water with just 1" of rainfall. How much water could you collect from your roof?

SARG Logo Average Tucson Temperatures and Precipitation
Month
Avg. High
Avg. Low
Average
Precipitation
Rec. High
Rec. Low
Average gallons of rain captured for 1000 sq. ft

January
66
33
.84
89
9
524

February
70
36
.80
97
11
499

March
74
40
.80
97
17
499

April
82
44
.22
104
24
137

May
90
53
.24
111
28
149

June
99
62
.35
116
38
218

July
99
70
2.54
114
52
1585

August
97
68
2.69
113
50
1678

September
94
62
1.39
111
38
867

October
85
50
1.12
103
20
698

November
74
39
.55
94
15
343

December
66
33
1.07
86
8
667

Total
12.61
7864


SARG Logo Average Rainfall Collected from a Roof

Inches
of Rain

Sq. Ft.
of Roof
1000
1500
2000
2500
3000
3500
4000
12.5
 
7792
11687
15583
19479
23375
27271
31167
12.0
 
7480
11220
14960
18700
22440
26180
29920
11.5
 
7168
10752
14337
17921
21505
25089
28673
11.0
 
6857
10285
13713
17142
20570
23998
27427
10.5
 
6545
9817
13090
16362
19635
22907
26180
10.0
 
6233
9350
12467
15583
18700
21817
24933
9.5
 
5922
8882
11843
14804
17765
20726
23687
9.0
 
5610
8415
11220
14025
16830
19635
22440
8.5
 
5298
7947
10597
13246
15895
18544
21193
8.0
 
4987
7480
9973
12467
14960
17453
19947
7.5
 
4675
7012
9350
11687
14025
16362
18700
7.0
 
4363
6545
8727
10908
13090
15272
17453
6.5
 
4052
6077
8103
10129
12155
14181
16207
6.0
 
3740
5610
7480
9350
11220
13090
14960
5.5
 
3428
5142
6857
8571
10285
11999
13713
5.0
 
3117
4675
6233
7792
9350
10908
12467
4.5
 
2805
4207
5610
7012
8415
9817
11220
4.0
 
2493
3740
4987
6233
7480
8727
9973
3.5
 
2182
3272
4363
5454
6545
7636
8727
3.0
 
1870
2805
3740
4675
5610
6545
7480
2.5
 
1558
2337
3117
389
4675
5454
6233
2.0
 
1247
1870
2493
3117
3740
4363
4987
1.5
 
935
1402
1870
2337
2805
3272
3740
1.0
 
623
935
1247
1558
1870
2182
2493
0.5
 
312
467
623
779
935
1091
1247

Call us today. 299-RAIN

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