Return to City Information homepage.

Return to LCD homepage.


Allentown Local Climatological Data

Updated February 2012, applying 1981-2010 normals and extremes through 2012

Latitude: 40.65 N
Longitude: -75.43 W
Elevation: 387 feet

    JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
Temperature (°F) Normal Daily Maximum 36.0 39.8 49.4 61.3 71.5 80.1 84.2 82.4 74.9 63.6 52.5 40.5 61.4
Normal Daily Minimum 19.5 21.7 28.8 38.5 48.3 58.1 62.7 60.9 52.9 41.3 32.9 24.0 40.8
Monthly Mean 27.8 30.7 39.1 49.9 59.9 69.1 73.4 71.7 63.9 52.5 42.7 32.3 51.1
Record Highest 72 76 87 93 97 100 105 100 99 90 81 72 105
Year 1950 1985 1998 1976 1962 1966 1966 1955 1980 1951 1950 1998 JUL 1996
Record Lowest -15 -8 -1 16 28 39 46 41 30 21 11 -8 -15
Year 1994 1996 1967 1982 1947 1972 2001 1986 1947 1988 1976 1950 JAN 1994
Normal Degree Days (base 65 °F) Heating 1155 959 803 458 198 33 3 8 104 396 669 1015 5801
Cooling 0 0 1 5 40 155 265 214 71 7 0 0 758
Percent of Possible Sunshine 43 48 53 47 54 63 57 56 54 53 45 42 51
Mean Sky Cover (oktas, sunrise to sunset) 5.4 5.1 5.1 5.1 5.1 4.8 4.6 4.5 4.5 4.4 5.2 5.3 4.9
Mean Number of Days Clear (sunrise to sunset) 6.9 7.2 7.7 6.9 6.7 7.6 8.0 8.7 9.2 10.2 6.7 6.9 92.7
Partly Cloudy (sunrise to sunset) 7.9 7.8 8.5 8.8 10.7 11.0 11.7 10.8 8.6 8.6 7.8 7.3 109.5
Cloudy (sunrise to sunset) 16.2 13.2 14.8 14.3 13.7 11.5 10.7 10.9 11.6 11.6 15.0 16.3 159.8
Precipitation > 0.01" 11.1 9.8 11.0 12.1 12.1 11.4 10.9 9.5 9.1 9.1 9.8 10.9 126.8
Snow or Ice > 1.0" 2.6 2.4 1.3 0.2 0 0 0 0 0 0 0.3 1.7 8.5
Thunderstorms 0.3 0.3 0.8 2.1 3.9 5.5 6.1 5.3 2.9 1.0 0.7 0.1 29.0
Heavy Fog Visibility < 1/4 mi 2.7 2.6 2.4 1.4 1.8 1.1 1.0 1.7 2.7 2.8 2.5 2.7 25.4
Maxima > 90 °F 0 0 0 0.2 0.6 2.2 5.3 3.0 0.6 0 0 0 11.9
Maxima < 32 °F 11.9 7.7 1.4 0 0 0 0 0 0 0 0.3 6.0 27.3
Minima < 32 °F 28.0 24.4 20.3 5.9 0.4 0 0 0 0 4.2 14.6 25.4 123.2
Minima < 0 °F 1.0 0.2 0 0 0 0 0 0 0 0 0 0.2 1.4
Precipitation (inches) Normal Monthly 3.03 2.70 3.39 3.56 4.14 4.31 4.95 3.69 4.62 3.88 3.50 3.58 45.35
Maximum Monthly 8.42 5.44 7.21 10.09 10.62 8.58 10.42 12.10 11.57 7.49 9.69 7.89
12.10
Year 1979 1971 1953 1952 1984 1972 1969 1955 1999 1995 1972 1973 AUG 1955
Minimum Monthly 0.67 0.55 0.97 0.61 0.09 0.34 0.33 0.76 0.94 0.15 0.68 0.39 0.09
Year 1981 2002 1981 1985 1964 1949 1999 1995 1967 1963 1976 1955 MAY 1964
Maximum in 24 hours 2.47 2.05 3.08 2.52 3.36 3.55 4.54 5.84 7.85 3.67 3.40 3.04 7.85
Year 1949 1966 1952 1968 1984 1967 1969 1982 1985 1996 1972 1993
Snow, Ice Pellets and Hail (inches) Normal 10.1 11.1 4.9 1.0 0 0 0 0 0 0 0.7 5.2 32.9
Maximum Monthly 35.5 29.5 30.5 13.4 T 0 0 0 0 1.4 7.8 28.4 35.5
Year 1996 1983 1958 1982 1994 - - - - 1972 1967 1966 JAN 1996
Maximum in 24 hours 25.6 25.2 17.5 11.4 T 0 0 0 0 1.4 6.4 13.3 25.6
Year 1996 1983 1958 1982 1994 - - - - 1972 1968 1966 JAN 1996
Relative Humidity (percent) 0100 local time 74 72 69 69 76 80 82 84 86 82 77 76 77
0700 local time 77 76 74 73 77 80 82 86 88 86 80 78 80
1300 local time 62 57 52 49 53 54 54 56 58 56 58 62 56
1900 local time 68 63 57 54 57 60 61 65 69 67 66 68 63

Sunrise and Sunset Times for Allentown

  JANUARY FEBRUARY MARCH APRIL MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER
Day Rise Set Rise Set Rise Set Rise Set Rise Set Rise Set Rise Set Rise Set Rise Set Rise Set Rise Set Rise Set
  h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m h m
1 734 1650 720 1724 643 1758 552 1833 506 1905 438 1934 439 1945 503 1925 534 1841 604 1751 639 1704 714 1640
2 734 1650 719 1725 642 1800 550 1834 505 1906 437 1935 439 1945 504 1924 535 1840 605 1749 640 1703 715 1640
3 734 1651 718 1727 640 1801 549 1835 504 1907 437 1936 440 1945 505 1923 536 1838 606 1747 641 1701 716 1639
4 734 1652 716 1728 638 1802 547 1836 502 1908 436 1937 440 1944 506 1922 537 1837 607 1746 643 1700 717 1639
5 734 1653 715 1729 637 1803 545 1837 501 1909 436 1937 441 1944 507 1921 538 1835 609 1744 644 1659 718 1639
6 734 1654 714 1730 635 1804 544 1838 500 1910 436 1938 441 1944 508 1919 539 1833 610 1742 645 1658 719 1639
7 734 1655 713 1732 634 1805 542 1839 459 1911 435 1939 442 1944 509 1918 540 1831 611 1741 646 1657 720 1639
8 734 1656 712 1733 632 1806 540 1840 458 1912 435 1939 443 1943 510 1917 541 1830 612 1739 647 1656 721 1639
9 733 1657 711 1734 630 1808 539 1841 456 1913 435 1940 443 1943 511 1916 542 1828 613 1737 649 1655 722 1639
10 733 1658 710 1735 629 1809 537 1842 455 1914 435 1940 444 1942 512 1914 543 1826 614 1736 650 1654 722 1639
11 733 1659 708 1737 627 1810 536 1844 454 1915 435 1941 445 1942 513 1913 544 1825 615 1734 651 1653 723 1639
12 733 1700 707 1738 625 1811 534 1845 453 1916 435 1941 446 1941 514 1912 545 1823 616 1733 652 1652 724 1639
13 732 1701 706 1739 624 1812 532 1846 452 1917 435 1942 446 1941 515 1910 546 1821 617 1731 653 1651 725 1639
14 732 1702 705 1740 622 1813 531 1847 451 1918 435 1942 447 1940 516 1909 547 1820 618 1729 655 1650 726 1640
15 732 1704 703 1742 620 1814 529 1848 450 1919 435 1943 448 1940 517 1907 548 1818 619 1728 656 1649 726 1640
16 731 1705 702 1743 619 1815 528 1849 449 1920 435 1943 449 1939 518 1906 549 1816 620 1726 657 1648 727 1640
17 731 1706 701 1744 617 1817 526 1850 448 1921 435 1943 449 1939 519 1905 550 1814 622 1725 658 1648 728 1640
18 730 1707 659 1745 615 1818 525 1851 447 1922 435 1944 450 1938 520 1903 551 1813 623 1723 659 1647 728 1641
19 730 1708 658 1747 614 1819 523 1852 446 1923 435 1944 451 1937 521 1902 552 1811 624 1722 700 1646 729 1641
20 729 1709 656 1748 612 1820 522 1853 445 1924 435 1944 452 1936 522 1900 553 1809 625 1720 702 1645 730 1642
21 729 1711 655 1749 610 1821 520 1854 445 1925 435 1944 453 1936 523 1859 554 1808 626 1719 703 1645 730 1642
22 728 1712 654 1750 609 1822 519 1855 444 1926 435 1945 454 1935 524 1857 555 1806 627 1717 704 1644 731 1643
23 727 1713 652 1751 607 1823 517 1856 443 1927 436 1945 455 1934 525 1856 556 1804 628 1716 705 1643 731 1643
24 726 1714 651 1753 605 1824 516 1857 442 1928 436 1945 456 1933 526 1854 557 1802 630 1714 706 1643 732 1644
25 726 1715 649 1754 604 1825 514 1859 442 1929 436 1945 456 1932 527 1853 558 1801 631 1713 707 1642 732 1644
26 725 1717 648 1755 602 1826 513 1900 441 1930 437 1945 457 1931 528 1851 559 1759 632 1712 709 1642 732 1645
27 724 1718 646 1756 600 1827 512 1901 440 1930 437 1945 458 1930 529 1850 600 1757 633 1710 710 1641 733 1646
28 723 1719 645 1757 559 1828 510 1902 440 1931 437 1945 459 1929 530 1848 601 1756 634 1709 711 1641 733 1646
29 722 1720     557 1830 509 1903 439 1932 438 1945 500 1928 531 1846 602 1754 635 1708 712 1641 733 1647
30 721 1722     555 1831 507 1904 439 1933 438 1945 501 1927 532 1845 603 1752 637 1706 713 1640 733 1648
31 721 1723     554 1832     438 1934     502 1926 533 1843     638 1705     734 1649