USGS Surface Water data for Montana: USGS Surface-Water Monthly Statistics

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USGS Surface-Water Monthly Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.

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.

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00060, Discharge, cubic feet per second,
YEAR	Monthly mean in ft3/s (Calculation Period: 1964-10-01 -> 2020-10-31)
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1964										837.7	619.9	836.5
1965	604.9	505.7	541.7	2,925	8,610	11,550	3,807	1,147	1,583	998	627	528.2
1966	412	344.9	504.6	2,521	8,208	6,754	2,148	649	423.4	347.8	379.7	397.6
1967	384	419.2	383.7	946.3	8,244	14,000	4,081	796.4	407	500.3	995.5	512.7
1968	540.3	646	1,102	1,171	6,298	9,236	2,734	871.7	1,330	1,323	932.2	546.2
1969	600.3	456.1	473.4	4,101	8,835	6,440	2,770	682.5	407.6	464.5	373.6	308.4
1970	310.6	333.5	350.7	550.6	8,534	11,840	2,286	721.6	446.1	433.8	443.8	454.2
1971	676.4	2,285	727.8	2,433	12,130	10,890	3,879	1,026	486.1	366.8	328.5	249.3
1972	251	281.6	1,342	1,839	9,558	14,150	4,044	1,331	602.4	524.4	412.4	388.6
1973	352.9	271.4	343.9	912.4	5,800	5,683	1,433	483.3	323.1	314.5	691.6	508.5
1974	1,197	673.9	637.9	2,849	6,465	15,910	4,588	1,149	600.1	367.5	355.4	290.2
1975	263.5	272.2	281.9	464.5	4,852	13,360	5,904	1,234	787.8	838.7	1,162	1,323
1976	671.6	563.2	461.2	2,872	10,910	8,171	3,782	1,084	542.5	351.5	336.3	293.3
1977	225.8	275.2	270.1	2,065	4,738	3,806	843.7	425.4	447.1	619.2	631.3	679.8
1978	428.6	359.5	1,017	3,516	6,744	10,130	4,259	980.1	774.7	405.7	405.8	288.5
1979	239	295.9	510.4	1,193	9,071	7,904	1,796	573.1	400.8	286.5	226.9	307.6
1980	206.7	201.4	252.5	3,109	8,662	5,618	1,752	644.4	588	434	694.5	1,044
1981	995.9	595.8	764.3	2,524	9,149	7,284	2,578	736.9	411.4	349.8	312.3	302.5
1982	255	585.6	612.1	1,257	7,729	12,660	4,310	979	482.2
1984										516.5	472.9
1985				2,488	9,619	6,386	1,226	626.7	1,853	1,878	1,972
1986				3,710	7,682	6,745	1,443	511.5	508.4	478.7	577.6
1987				3,552	6,689	2,522	879.3	491.4
1991										325.5	404.8
1992				2,738	6,559	3,337	1,300	478.7	486.4	643.1	487.8
1993				1,561	8,253	4,386	2,852	1,075	943.1	537.2	394
1994				4,064	7,089	4,001	1,158	431.1	273.1	316.8	376.3
1995				1,442	5,250	7,241	2,335	719	423.7	788.2	1,927
1996				3,539	6,893	11,620	3,508	907.7
1999										636.4	957.4
2000				3,819	7,529	7,094	1,939	539.7	351.9	465.3	265
2001					6,659	4,595	1,239	468	261.8	291.3	497.8
2002				1,830	6,707	11,250	3,345	742.2	453.9	331	289.3
2003				3,392	6,508	6,688	1,297	455.2	371.1	472.2	582.5
2004				4,077	6,313	5,465	1,864	691.3	989.8	958.2	742.8
2005				2,127	5,601	5,370	1,476	515.1	335.7	650.7
2006				3,572	10,280	7,391	1,449	495.6	338.4
2007				2,787	7,571	4,545	1,087	406.2	293.3	414.7	416.9
2008				948.4	9,415	10,420	4,207	869.5	599.8	522.5	1,137
2009				2,031	6,908	7,008	2,134	730.1	354.4	340.4	532.2
2010				2,326	5,203	8,712	2,506	708.3	688.2	463.8	612.5
2011				1,405	8,462	15,940	9,727	1,576	598.6	623.4	555.5
2012				5,288	7,343	9,845	2,932	666.9	330.7	364.2	915.2
2013				2,647	10,070	7,205	1,729	543.8	407.9	433.9	343.7
2014				2,038	10,640	10,510	3,885	875.9	494.1	562.5
2015				3,439	5,298	3,879	829.1	368.3	308	241.6
2016				4,719	5,991	4,274	1,217	454.9	312.9
2017				3,612	9,697	8,272	1,466	519.8	344.2
2018				2,827	16,170	8,661	2,390	649.9	344.8	355.2
2019				3,129	6,973	5,032	1,262	511.2	507.1	692
2020				2,553	10,040	9,633	2,741	682.2	353.2	613.7
Mean of monthly Discharge	479	520	588	2,580	7,910	8,160	2,600	728	546	548	625	514
** No Incomplete data have been used for statistical calculation

00060, Discharge, cubic feet per second,

YEAR

Monthly mean in ft3/s (Calculation Period: 1964-10-01 -> 2020-10-31)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

1964

837.7

619.9

836.5

1965

604.9

505.7

541.7

2,925

8,610

11,550

3,807

1,147

1,583

998

627

528.2

1966

412

344.9

504.6

2,521

8,208

6,754

2,148

649

423.4

347.8

379.7

397.6

1967

384

419.2

383.7

946.3

8,244

14,000

4,081

796.4

407

500.3

995.5

512.7

1968

540.3

646

1,102

1,171

6,298

9,236

2,734

871.7

1,330

1,323

932.2

546.2

1969

600.3

456.1

473.4

4,101

8,835

6,440

2,770

682.5

407.6

464.5

373.6

308.4

1970

310.6

333.5

350.7

550.6

8,534

11,840

2,286

721.6

446.1

433.8

443.8

454.2

1971

676.4

2,285

727.8

2,433

12,130

10,890

3,879

1,026

486.1

366.8

328.5

249.3

1972

251

281.6

1,342

1,839

9,558

14,150

4,044

1,331

602.4

524.4

412.4

388.6

1973

352.9

271.4

343.9

912.4

5,800

5,683

1,433

483.3

323.1

314.5

691.6

508.5

1974

1,197

673.9

637.9

2,849

6,465

15,910

4,588

1,149

600.1

367.5

355.4

290.2

1975

263.5

272.2

281.9

464.5

4,852

13,360

5,904

1,234

787.8

838.7

1,162

1,323

1976

671.6

563.2

461.2

2,872

10,910

8,171

3,782

1,084

542.5

351.5

336.3

293.3

1977

225.8

275.2

270.1

2,065

4,738

3,806

843.7

425.4

447.1

619.2

631.3

679.8

1978

428.6

359.5

1,017

3,516

6,744

10,130

4,259

980.1

774.7

405.7

405.8

288.5

1979

239

295.9

510.4

1,193

9,071

7,904

1,796

573.1

400.8

286.5

226.9

307.6

1980

206.7

201.4

252.5

3,109

8,662

5,618

1,752

644.4

588

434

694.5

1,044

1981

995.9

595.8

764.3

2,524

9,149

7,284

2,578

736.9

411.4

349.8

312.3

302.5

1982

255

585.6

612.1

1,257

7,729

12,660

4,310

979

482.2

1984

516.5

472.9

1985

2,488

9,619

6,386

1,226

626.7

1,853

1,878

1,972

1986

3,710

7,682

6,745

1,443

511.5

508.4

478.7

577.6

1987

3,552

6,689

2,522

879.3

491.4

1991

325.5

404.8

1992

2,738

6,559

3,337

1,300

478.7

486.4

643.1

487.8

1993

1,561

8,253

4,386

2,852

1,075

943.1

537.2

394

1994

4,064

7,089

4,001

1,158

431.1

273.1

316.8

376.3

1995

1,442

5,250

7,241

2,335

719

423.7

788.2

1,927

1996

3,539

6,893

11,620

3,508

907.7

1999

636.4

957.4

2000

3,819

7,529

7,094

1,939

539.7

351.9

465.3

265

2001

6,659

4,595

1,239

468

261.8

291.3

497.8

2002

1,830

6,707

11,250

3,345

742.2

453.9

331

289.3

2003

3,392

6,508

6,688

1,297

455.2

371.1

472.2

582.5

2004

4,077

6,313

5,465

1,864

691.3

989.8

958.2

742.8

2005

2,127

5,601

5,370

1,476

515.1

335.7

650.7

2006

3,572

10,280

7,391

1,449

495.6

338.4

2007

2,787

7,571

4,545

1,087

406.2

293.3

414.7

416.9

2008

948.4

9,415

10,420

4,207

869.5

599.8

522.5

1,137

2009

2,031

6,908

7,008

2,134

730.1

354.4

340.4

532.2

2010

2,326

5,203

8,712

2,506

708.3

688.2

463.8

612.5

2011

1,405

8,462

15,940

9,727

1,576

598.6

623.4

555.5

2012

5,288

7,343

9,845

2,932

666.9

330.7

364.2

915.2

2013

2,647

10,070

7,205

1,729

543.8

407.9

433.9

343.7

2014

2,038

10,640

10,510

3,885

875.9

494.1

562.5

2015

3,439

5,298

3,879

829.1

368.3

308

241.6

2016

4,719

5,991

4,274

1,217

454.9

312.9

2017

3,612

9,697

8,272

1,466

519.8

344.2

2018

2,827

16,170

8,661

2,390

649.9

344.8

355.2

2019

3,129

6,973

5,032

1,262

511.2

507.1

692

2020

2,553

10,040

9,633

2,741

682.2

353.2

613.7

Mean of
monthly
Discharge

479

520

588

2,580

7,910

8,160

2,600

728

546

548

625

514

** No Incomplete data have been used for statistical calculation

USGS 12359800 S F Flathead R ab Twin C nr Hungry Horse MT