Overview Realtime Historical Map View
Heat Advisory
2026-07-15T20:00:00-04:00

* WHAT...Heat index values up to 105 expected. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...From 11 AM to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Monocacy River At Monocacy Blvd At Frederick, Md Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 1269.33
01-02 1360.17
01-03 1205.64
01-04 967.8
01-05 1000.64
01-06 897.0
01-07 765.55
01-08 779.0
01-09 744.73
01-10 1781.64
01-11 2362.91
01-12 1302.5
01-13 1720.18
01-14 1326.17
01-15 1004.5
01-16 913.67
01-17 1303.85
01-18 962.58
01-19 804.91
01-20 775.2
01-21 1621.2
01-22 803.5
01-23 697.13
01-24 1757.67
01-25 2404.22
01-26 2424.67
01-27 1402.8
01-28 1404.73
01-29 1731.4
01-30 1090.0
01-31 1253.8
02-01 2443.6
02-02 999.0
02-03 934.4
02-04 2023.27
02-05 2110.75
02-06 1662.08
02-07 1187.23
02-08 1667.38
02-09 1111.38
02-10 896.92
02-11 833.54
02-12 1290.62
02-13 1189.08
02-14 1511.67
02-15 1069.75
02-16 1095.92
02-17 2418.27
02-18 1337.45
02-19 1089.0
02-20 997.62
02-21 1479.25
02-22 1387.73
02-23 1564.17
02-24 1647.67
02-25 2478.75
02-26 1853.5
02-27 1281.62
02-28 1540.92
02-29 1039.5
03-01 1877.54
03-02 1412.62
03-03 1469.86
03-04 1291.71
03-05 1299.79
03-06 1447.5
03-07 1173.36
03-08 1012.43
03-09 940.14
03-10 1722.07
03-11 1728.86
03-12 1611.29
03-13 1868.21
03-14 1120.36
03-15 1603.5
03-16 1030.71
03-17 1038.29
03-18 970.0
03-19 1037.8
03-20 1063.29
03-21 910.0
03-22 1727.71
03-23 1063.4
03-24 1110.0
03-25 1001.73
03-26 1021.93
03-27 912.73
03-28 875.27
03-29 992.4
03-30 952.0
03-31 1622.86
04-01 1343.67
04-02 1313.0
04-03 1532.47
04-04 1830.27
04-05 1077.93
04-06 911.2
04-07 1419.13
04-08 1412.87
04-09 1012.53
04-10 844.53
04-11 742.13
04-12 871.64
04-13 815.14
04-14 1233.57
04-15 1021.38
04-16 1071.31
04-17 1762.85
04-18 848.31
04-19 751.54
04-20 1132.85
04-21 1384.86
04-22 890.36
04-23 752.79
04-24 780.64
04-25 703.71
04-26 752.86
04-27 765.21
04-28 682.29
04-29 664.36
04-30 836.79
05-01 3431.2
05-02 1566.36
05-03 1033.93
05-04 1188.4
05-05 1249.13
05-06 2079.93
05-07 2326.2
05-08 2335.67
05-09 1209.93
05-10 1229.14
05-11 930.2
05-12 912.07
05-13 1222.4
05-14 1624.8
05-15 897.64
05-16 1121.79
05-17 2447.07
05-18 1254.87
05-19 1090.33
05-20 1834.43
05-21 950.8
05-22 893.8
05-23 1068.53
05-24 1062.87
05-25 919.13
05-26 898.67
05-27 720.8
05-28 763.6
05-29 1123.27
05-30 857.8
05-31 708.13
06-01 722.79
06-02 974.47
06-03 952.2
06-04 896.6
06-05 681.79
06-06 639.57
06-07 567.93
06-08 506.07
06-09 467.13
06-10 502.13
06-11 650.67
06-12 1218.93
06-13 895.57
06-14 998.43
06-15 617.07
06-16 518.0
06-17 460.07
06-18 423.87
06-19 629.86
06-20 749.21
06-21 536.17
06-22 607.57
06-23 463.71
06-24 520.79
06-25 460.5
06-26 470.36
06-27 449.29
06-28 1374.29
06-29 633.0
06-30 403.57
07-01 335.71
07-02 398.14
07-03 312.79
07-04 300.36
07-05 298.34
07-06 320.0
07-07 361.36
07-08 475.29
07-09 641.07
07-10 422.53
07-11 361.4
07-12 324.25
07-13 341.44
07-14 340.44
07-15 281.78
07-16 278.42
07-17 235.4
07-18 274.11
07-19 308.64
07-20 356.52
07-21 299.94
07-22 870.72
07-23 1490.57
07-24 820.36
07-25 989.64
07-26 648.89
07-27 541.64
07-28 386.09
07-29 460.9
07-30 487.64
07-31 408.61
08-01 343.24
08-02 346.28
08-03 535.62
08-04 580.08
08-05 1025.15
08-06 490.21
08-07 353.1
08-08 355.15
08-09 345.47
08-10 362.08
08-11 272.44
08-12 242.05
08-13 254.06
08-14 328.44
08-15 252.12
08-16 257.12
08-17 246.9
08-18 226.85
08-19 263.16
08-20 282.86
08-21 273.34
08-22 545.71
08-23 374.04
08-24 301.96
08-25 256.68
08-26 223.25
08-27 195.37
08-28 198.31
08-29 274.79
08-30 195.86
08-31 173.34
09-01 157.16
09-02 1879.69
09-03 938.9
09-04 290.05
09-05 287.65
09-06 225.02
09-07 332.44
09-08 615.37
09-09 1909.8
09-10 2181.67
09-11 1830.81
09-12 649.65
09-13 536.09
09-14 429.91
09-15 355.44
09-16 459.94
09-17 363.37
09-18 594.79
09-19 1122.49
09-20 446.94
09-21 323.34
09-22 360.0
09-23 491.36
09-24 2608.67
09-25 652.62
09-26 950.36
09-27 886.32
09-28 1409.03
09-29 1313.64
09-30 878.34
10-01 478.7
10-02 314.77
10-03 592.28
10-04 640.17
10-05 515.89
10-06 450.18
10-07 358.67
10-08 320.83
10-09 303.46
10-10 289.73
10-11 334.23
10-12 1081.84
10-13 612.61
10-14 478.44
10-15 601.56
10-16 578.43
10-17 432.07
10-18 353.79
10-19 284.55
10-20 572.39
10-21 485.7
10-22 326.34
10-23 286.59
10-24 275.69
10-25 262.41
10-26 266.2
10-27 272.54
10-28 540.64
10-29 579.79
10-30 1914.02
10-31 2650.71
11-01 1352.54
11-02 795.92
11-03 785.28
11-04 667.21
11-05 392.11
11-06 1069.02
11-07 1204.25
11-08 567.13
11-09 511.7
11-10 617.13
11-11 493.03
11-12 463.22
11-13 594.1
11-14 826.49
11-15 484.67
11-16 478.79
11-17 955.77
11-18 797.72
11-19 555.52
11-20 560.77
11-21 494.8
11-22 518.33
11-23 1190.0
11-24 2237.69
11-25 1422.23
11-26 767.71
11-27 735.57
11-28 965.21
11-29 611.14
11-30 573.07
12-01 611.07
12-02 749.36
12-03 839.14
12-04 712.14
12-05 589.93
12-06 562.77
12-07 666.86
12-08 1287.14
12-09 873.64
12-10 887.29
12-11 764.14
12-12 792.86
12-13 583.57
12-14 529.85
12-15 687.92
12-16 1841.25
12-17 1951.75
12-18 1246.33
12-19 1339.46
12-20 739.23
12-21 704.75
12-22 1731.15
12-23 1394.31
12-24 1921.77
12-25 2253.23
12-26 1524.85
12-27 1039.25
12-28 1405.15
12-29 1995.91
12-30 1889.5
12-31 1251.33

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index