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Pennsylvania · THREADEX · 1888–2026

Middletown-Harrisburg, PA

40.196°N, 76.772°W · station MDTthr · 139 years of record
90°F
forecast high · Sep 1

7-Day Forecast

NWS NDFD forecast high temperature for Middletown-Harrisburg.
90°TUE9/184°WED9/288°THU9/385°FRI9/481°SAT9/579°SUN9/680°MON9/7

This Day in History

Every year's high on each of the next 7 forecast dates at Middletown-Harrisburg — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.

Ranks

#16 / 138
warmest Sep 1 in 138 yrs of record

Warmest Sep 1 ever

98°F
set in 1932

Coolest Sep 1 ever

63°F
set in 2006
Forecast high 90°F — 16th warmest Sep 1 of 138 years · record 98°F (1932) · warmest since 2016.
1888: 76°F1889: 81°F1890: 75°F1891: 78°F1892: 78°F1893: 70°F1894: 79°F1895: 72°F1896: 73°F1897: 81°F1898: 92°F1899: 83°F1900: 88°F1901: 78°F1902: 89°F1903: 74°F1904: 71°F1905: 79°F1906: 74°F1907: 75°F1908: 85°F1909: 71°F1910: 74°F1911: 81°F1912: 70°F1913: 84°F1914: 87°F1915: 71°F1916: 88°F1917: 82°F1918: 78°F1919: 71°F1920: 85°F1921: 94°F1922: 73°F1923: 83°F1924: 96°F1925: 87°F1926: 83°F1927: 69°F1928: 79°F1929: 92°F1930: 87°F1931: 86°F1932: 98°F1933: 77°F1934: 74°F1935: 69°F1936: 74°F1937: 90°F1938: 80°F1939: 87°F1940: 79°F1941: 91°F1942: 84°F1943: 97°F1944: 88°F1945: 89°F1946: 80°F1947: 79°F1948: 78°F1949: 73°F1950: 86°F1951: 90°F1952: 78°F1953: 98°F1954: 75°F1955: 78°F1956: 91°F1957: 86°F1958: 76°F1959: 87°F1960: 84°F1961: 93°F1962: 86°F1963: 77°F1964: 92°F1965: 87°F1966: 93°F1967: 71°F1968: 81°F1969: 91°F1970: 75°F1971: 70°F1972: 86°F1973: 93°F1974: 83°F1975: 66°F1976: 76°F1977: 84°F1978: 81°F1979: 84°F1980: 90°F1981: 73°F1982: 78°F1983: 82°F1984: 81°F1985: 72°F1986: 73°F1987: 73°F1988: 79°F1989: 84°F1990: 83°F1991: 74°F1992: 82°F1993: 87°F1994: 77°F1995: 87°F1996: 83°F1997: 88°F1998: 85°F1999: 85°F2000: 87°F2001: 78°F2002: 66°F2003: 76°F2004: 80°F2005: 84°F2006: 63°F2007: 80°F2008: 86°F2009: 74°F2010: 96°F2011: 79°F2012: 89°F2013: 87°F2014: 88°F2015: 89°F2016: 90°F2017: 67°F2018: 77°F2019: 82°F2020: 74°F2021: 73°F2022: 87°F2023: 80°F2024: 79°F2025: 82°F90° forecast606570758085909510018901900191019201930194019501960197019801990200020102020
📖 Middletown-Harrisburg's full Climate Almanac →

The Numbers

Forecast high · Sep 190°F
Hottest this date since2016
This-date record98°F
This-date rank#16 of 138
Hottest at any time since2026
All-time record107°F (1966)
Odds to tie/break0.0% (daily)
Period of record1888–2026

Record Book

The hottest and coldest ever recorded at Middletown-Harrisburg in each calendar month, and for the whole 1888–2026 record — with the year each was set.
MonthRecord HighRecord Low
Jan73°FJan 14, 1932-22°FJan 21, 1994
Feb79°FFeb 21, 2018-13°FFeb 10, 1899
Mar87°FMar 30, 1998-1°FMar 7, 2015
Apr93°FApr 25, 191511°FApr 1, 1923
May97°FMay 31, 193930°FMay 10, 2020
Jun100°FJun 29, 193440°FJun 11, 1980
Jul107°FJul 3, 196649°FJul 12, 1945
Aug104°FAug 6, 191845°FAug 31, 1976
Sep102°FSep 2, 195330°FSep 24, 1963
Oct97°FOct 5, 194123°FOct 24, 1969
Nov84°FNov 1, 195010°FNov 30, 1929
Dec75°FDec 29, 1984-8°FDec 23, 1960
All-time107°FJul 3, 1966-22°FJan 21, 1994

2026 Records So Far

Records set or tied at Middletown-Harrisburg so far this year — through Aug 30.

Record Highs in 2026

4 broke
plus 2 tied — daily record highs set this year

Record Lows in 2026

2 broke
plus 0 tied — daily record lows set this year

Record Warm Nights & Cold Days

Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.

Warmest low ever

83°F
record high minimum — the night it never cooled · Aug 9, 1900

Coldest high ever

-1°F
record low maximum — the day it never warmed · Jan 19, 1994
MonthWarmest lowColdest high
Jan59°FJan 8, 1998-1°FJan 19, 1994
Feb51°FFeb 24, 19850°FFeb 10, 1899
Mar66°FMar 16, 199016°FMar 6, 1901
Apr69°FApr 19, 198533°FApr 3, 1896
May74°FMay 31, 189543°FMay 5, 1917
Jun79°FJun 27, 195253°FJun 2, 1907
Jul81°FJul 24, 201062°FJul 3, 1978
Aug83°FAug 9, 190059°FAug 26, 1940
Sep76°FSep 4, 197048°FSep 28, 1984
Oct73°FOct 5, 189836°FOct 30, 1925
Nov64°FNov 4, 196121°FNov 30, 1929
Dec57°FDec 29, 19845°FDec 29, 1917
All-time83°FAug 9, 1900-1°FJan 19, 1994

Hot Streaks

Current run

0 days
consecutive days with a high ≥ 90°F

Longest ever

11 days
record run, ended Jul 6 1901

So far in 2026

15 days
days with a high ≥ 90°F this year

Climate Normals

Normal high & low by month, from Middletown-Harrisburg's own 1991–2020 record. Today's normal high: 83°F · forecast is +7° vs normal.
Jan: 38°FJan: 23°FFeb: 42°FFeb: 25°FMar: 51°FMar: 32°FApr: 64°FApr: 42°FMay: 73°FMay: 53°FJun: 82°FJun: 63°FJul: 87°FJul: 68°FAug: 84°FAug: 66°FSep: 77°FSep: 58°FOct: 66°FOct: 46°FNov: 54°FNov: 36°FDec: 43°FDec: 28°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise5:34 AM
Sunset6:39 PM
Solar noon12:07 PM
Daylight13h 05m · losing 17 min/wk
Local standard time (no DST), level horizon.

Location

40.20°N, 76.77°W

Nearby Stations

Reading, PA44 mi EHagerstown, MD60 mi SWBaltimore Downtown, MD63 mi SBaltimore, MD70 mi SWilmington, DE71 mi SEWilliamsport, PA72 mi N

The Last 6 Weeks

Middletown-Harrisburg's observed daily high for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.
Middletown-Harrisburg, PA — last six weeks of daily high

2026 So Far

Every day this year against Middletown-Harrisburg's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.
Middletown-Harrisburg, PA — 2026 daily high trace
Download year chart

Every Day Since 1888

Each cell is one day's high at Middletown-Harrisburg, coloured by temperature — 139 years of record, so heat waves read as warm streaks and cold snaps as blue.
Middletown-Harrisburg, PA daily high heat map 1888–2026

Days Above the Mark

How many days a year hit a given high at Middletown-Harrisburg — counted through Sep 1 each year, so you can see whether 2026 is running hot. Pick a threshold:
15 days ≥90°F so far in 2026 — tied for the 78th most in 139 years. Normal for this point: 18. Record: 58 in 1966.

Share Card

A ready-to-share summary of Middletown-Harrisburg's outlook — post it, or link this page.
Middletown-Harrisburg, PA hot share card
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