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

* WHAT...Heat index values up to 103 expected. * WHERE...Berks, Lehigh, Northampton, Eastern Chester, Upper Bucks, Western Chester, and Western Montgomery Counties. * WHEN...From 10 AM to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Lehigh River At Bethlehem, Pa 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 3605.83
01-02 3414.67
01-03 3457.67
01-04 3381.91
01-05 3094.55
01-06 3026.0
01-07 3175.45
01-08 2951.91
01-09 2788.18
01-10 4168.18
01-11 4172.73
01-12 4527.08
01-13 3947.5
01-14 4076.67
01-15 3840.0
01-16 3439.17
01-17 3349.42
01-18 2605.0
01-19 2634.62
01-20 2643.85
01-21 2701.46
01-22 2363.25
01-23 2281.4
01-24 3039.55
01-25 4719.55
01-26 4774.44
01-27 4409.56
01-28 3799.27
01-29 4049.5
01-30 3149.08
01-31 3084.27
02-01 3027.38
02-02 2692.69
02-03 2643.09
02-04 3325.18
02-05 3515.17
02-06 2880.08
02-07 2600.85
02-08 2739.62
02-09 2594.69
02-10 2321.0
02-11 2288.69
02-12 2567.92
02-13 2493.15
02-14 2275.57
02-15 2254.31
02-16 2251.67
02-17 3301.83
02-18 2899.58
02-19 2798.31
02-20 2537.69
02-21 2572.31
02-22 2696.15
02-23 2654.62
02-24 2788.46
02-25 3415.67
02-26 3219.0
02-27 3338.46
02-28 3217.69
02-29 4097.5
03-01 3222.31
03-02 3103.71
03-03 3306.5
03-04 3165.14
03-05 3004.14
03-06 3587.69
03-07 3483.85
03-08 3166.29
03-09 2972.93
03-10 3343.57
03-11 3292.14
03-12 3515.0
03-13 4265.71
03-14 3668.57
03-15 3656.43
03-16 3382.86
03-17 3518.57
03-18 3421.43
03-19 3404.67
03-20 3328.57
03-21 2980.0
03-22 3333.57
03-23 3322.0
03-24 3624.0
03-25 3475.71
03-26 3222.67
03-27 2914.0
03-28 2861.33
03-29 3068.67
03-30 3066.67
03-31 3291.43
04-01 3728.0
04-02 3367.33
04-03 3388.0
04-04 4334.67
04-05 3989.33
04-06 3650.67
04-07 3649.33
04-08 4295.47
04-09 3882.0
04-10 3410.8
04-11 3107.33
04-12 2820.36
04-13 2787.86
04-14 3745.57
04-15 3220.23
04-16 3811.92
04-17 3691.15
04-18 3391.0
04-19 3170.77
04-20 3095.0
04-21 3176.79
04-22 3022.14
04-23 3116.43
04-24 2976.43
04-25 2575.71
04-26 2586.43
04-27 2942.14
04-28 2640.0
04-29 2431.43
04-30 2629.29
05-01 4572.67
05-02 4507.86
05-03 3985.71
05-04 3628.67
05-05 3519.33
05-06 3714.0
05-07 3774.67
05-08 4174.67
05-09 3721.33
05-10 4026.67
05-11 3462.67
05-12 3224.0
05-13 3250.67
05-14 3567.33
05-15 3219.29
05-16 3195.71
05-17 3843.57
05-18 3932.0
05-19 3560.0
05-20 3511.43
05-21 3339.33
05-22 3245.71
05-23 3122.67
05-24 3467.87
05-25 3115.33
05-26 2778.2
05-27 2557.33
05-28 2553.67
05-29 2620.67
05-30 2900.2
05-31 2880.67
06-01 2854.07
06-02 2804.87
06-03 2891.87
06-04 2601.2
06-05 2386.2
06-06 2359.79
06-07 2241.73
06-08 2268.33
06-09 2160.2
06-10 2242.13
06-11 2422.33
06-12 3058.57
06-13 2890.0
06-14 2851.29
06-15 2588.0
06-16 2386.67
06-17 2306.67
06-18 2212.71
06-19 2251.36
06-20 2241.07
06-21 2137.36
06-22 2193.71
06-23 1964.79
06-24 2046.93
06-25 2185.21
06-26 2073.57
06-27 2073.57
06-28 2127.14
06-29 2112.0
06-30 1923.79
07-01 2067.14
07-02 2588.64
07-03 2630.5
07-04 2352.21
07-05 2117.53
07-06 1876.8
07-07 2018.79
07-08 2216.5
07-09 2147.71
07-10 2577.73
07-11 2316.67
07-12 2237.0
07-13 1881.87
07-14 1802.93
07-15 1934.71
07-16 1963.57
07-17 1937.64
07-18 1938.14
07-19 1805.71
07-20 1549.71
07-21 1513.36
07-22 1618.86
07-23 2313.29
07-24 2148.29
07-25 2767.07
07-26 3188.0
07-27 2441.57
07-28 2357.79
07-29 2182.0
07-30 2056.57
07-31 1776.43
08-01 1588.46
08-02 1675.0
08-03 2070.64
08-04 2388.43
08-05 4445.57
08-06 2166.57
08-07 2048.5
08-08 2729.38
08-09 2049.38
08-10 2092.62
08-11 1808.64
08-12 1916.93
08-13 1923.71
08-14 3795.71
08-15 2787.5
08-16 2745.46
08-17 2320.54
08-18 2211.17
08-19 2358.0
08-20 1990.38
08-21 1773.08
08-22 2226.17
08-23 2296.71
08-24 2927.23
08-25 2716.15
08-26 2431.43
08-27 2512.86
08-28 2454.14
08-29 3161.14
08-30 2412.57
08-31 2395.21
09-01 2580.64
09-02 5172.86
09-03 2837.07
09-04 2488.29
09-05 2471.64
09-06 2931.36
09-07 3249.36
09-08 3488.93
09-09 3771.71
09-10 2673.86
09-11 3008.43
09-12 2838.5
09-13 2907.14
09-14 2461.93
09-15 2255.21
09-16 2067.21
09-17 1862.0
09-18 1689.14
09-19 2726.07
09-20 2204.64
09-21 2021.5
09-22 2031.54
09-23 1831.21
09-24 2752.93
09-25 2296.29
09-26 2375.86
09-27 2217.64
09-28 2128.5
09-29 2816.36
09-30 2722.23
10-01 2235.08
10-02 1946.31
10-03 2062.46
10-04 1820.31
10-05 2189.93
10-06 2278.14
10-07 2173.0
10-08 2386.36
10-09 2330.54
10-10 1916.29
10-11 2075.5
10-12 2423.86
10-13 2224.21
10-14 1967.93
10-15 1937.62
10-16 1784.93
10-17 2105.79
10-18 2006.21
10-19 1734.29
10-20 2091.21
10-21 1879.36
10-22 1763.85
10-23 1744.15
10-24 1602.21
10-25 1512.64
10-26 1463.0
10-27 1477.36
10-28 1922.86
10-29 1794.64
10-30 2588.57
10-31 2996.64
11-01 3069.86
11-02 3203.29
11-03 3354.07
11-04 2793.71
11-05 2008.62
11-06 2129.77
11-07 2177.77
11-08 1982.23
11-09 1796.62
11-10 1903.15
11-11 1757.46
11-12 1782.46
11-13 2192.69
11-14 2269.21
11-15 2141.36
11-16 2118.43
11-17 2130.93
11-18 2015.15
11-19 1866.23
11-20 1741.92
11-21 1720.43
11-22 1762.15
11-23 1989.0
11-24 2618.23
11-25 2584.23
11-26 2395.57
11-27 2720.5
11-28 2617.57
11-29 2453.07
11-30 2494.29
12-01 3009.64
12-02 2697.14
12-03 2618.36
12-04 2423.93
12-05 2288.14
12-06 2279.46
12-07 2394.0
12-08 2816.93
12-09 2727.93
12-10 2535.14
12-11 2637.21
12-12 2740.29
12-13 2443.5
12-14 2247.0
12-15 2178.92
12-16 2094.31
12-17 2513.5
12-18 2890.75
12-19 3632.54
12-20 3298.08
12-21 3193.33
12-22 4436.15
12-23 3550.0
12-24 4085.77
12-25 4560.67
12-26 4930.25
12-27 4554.36
12-28 4474.62
12-29 4806.36
12-30 4523.33
12-31 3929.17

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index