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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 09471550 SAN PEDRO RIVER NEAR TOMBSTONE, AZ


Cochise County, Arizona
Hydrologic Unit Code 15050202
Latitude  31°45'05.2", Longitude 110°12'04.8" NAD83
Drainage area 1,740  square miles
Contributing drainage area 1,740  square miles
Gage datum 3,787.17 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1966-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 33 33 17 14 6.5 1.4 11 251 38 66 8.6 23
2 27 27 22 13 15 1.3 14 132 43 97 8 14
3 19 25 24 13 7.3 1.3 10 144 48 111 7.6 13
4 16 40 30 13 6.1 4 11 217 38 43 7.5 12
5 15 50 45 12 5.8 5.4 7.9 170 47 22 9.8 12
6 24 36 38 12 5.6 2 16 151 85 24 14 11
7 33 31 29 12 5.3 2.1 32 142 47 18 20 11
8 43 28 25 11 5.1 1.4 33 121 74 151 23 12
9 32 25 22 11 4.9 1.2 23 200 56 386 15 11
10 24 23 20 11 4.8 1 59 221 73 113 12 11
11 20 22 21 10 4.4 0.98 67 220 73 37 11 13
12 18 21 23 10 3.9 0.84 53 206 66 68 9.8 12
13 18 21 20 9.9 3.8 0.98 42 241 74 54 9.7 12
14 17 21 21 9.7 3.7 0.81 32 221 69 19 9.5 13
15 17 20 26 9.4 3.5 0.64 47 194 31 11 9.1 18
16 16 20 24 9.2 3.2 0.56 68 149 20 8.7 9 15
17 17 19 21 9.1 3.4 0.45 123 123 17 8.6 8.9 14
18 120 19 19 9.1 3.5 3.9 104 137 81 11 8.7 17
19 38 19 20 9 3.2 0.89 105 131 205 19 8.6 156
20 26 18 22 8.5 3 0.57 160 107 79 27 8.8 125
21 23 19 21 8.3 2.6 0.94 75 77 42 14 8.8 80
22 24 25 19 8.1 2.6 0.91 127 87 60 15 9.3 32
23 23 26 18 7.7 2.4 0.54 111 95 22 171 9.1 27
24 22 22 17 7.6 2.2 8.7 126 118 22 113 9.1 30
25 25 20 17 7.5 2.2 1.7 97 152 25 25 35 18
26 37 18 16 7.3 2 0.64 119 98 44 15 16 17
27 43 18 15 7.2 1.9 3 197 91 36 11 11 16
28 37 18 15 7.1 2.2 3.8 172 76 44 11 36 109
29 28 16 15 6.9 1.7 11 164 69 76 10 80 53
30 24   14 6.7 1.8 15 174 83 25 9.7 56 29
31 27   14   1.6   212 61   9.1   22