HOTTESTSINCE.COMBrowse statesThe AlmanacYear in ReviewThe Wire
HOT10
Hottest Since
National Heat Records
Ohio · THREADEX · 1917–2026

Wilmington, OH

39.431°N, 83.777°W · station ILNthr · 110 years of record
93°F
forecast high · Sep 1

7-Day Forecast

NWS NDFD forecast high temperature for Wilmington.
93°TUE9/193°WED9/291°THU9/390°FRI9/487°SAT9/584°SUN9/684°MON9/7

This Day in History

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

Ranks

#14 / 106
warmest Sep 1 in 106 yrs of record

Warmest Sep 1 ever

99°F
set in 1932

Coolest Sep 1 ever

60°F
set in 2017
Forecast high 93°F — 14th warmest Sep 1 of 106 years · record 99°F (1932) · warmest since 2012.
1917: 85°F1918: 81°F1919: 74°F1920: 88°F1921: 89°F1922: 93°F1923: 87°F1924: 92°F1925: 94°F1926: 80°F1927: 81°F1928: 87°F1929: 89°F1930: 93°F1931: 88°F1932: 99°F1933: 71°F1934: 91°F1935: 76°F1936: 82°F1937: 94°F1938: 84°F1939: 93°F1940: 88°F1941: 89°F1942: 84°F1943: 96°F1944: 73°F1945: 87°F1946: 78°F1947: 88°F1948: 80°F1949: 73°F1950: 89°F1951: 88°F1952: 85°F1953: 99°F1954: 76°F1955: 77°F1956: 89°F1957: 94°F1958: 74°F1959: 86°F1960: 88°F1961: 81°F1962: 82°F1963: 76°F1964: 86°F1965: 74°F1966: 83°F1967: 75°F1968: 84°F1969: 90°F1970: 81°F1971: 88°F1972: 90°F1973: 93°F1975: 78°F1976: 68°F1977: 88°F1978: 73°F1979: 86°F1980: 82°F1982: 85°F1983: 81°F1984: 84°F1985: 76°F1986: 77°F1987: 75°F1988: 72°F1989: 85°F1990: 82°F1991: 85°F1992: 80°F1993: 94°F1994: 74°F1995: 91°F1996: 79°F1997: 83°F1998: 80°F1999: 84°F2000: 86°F2001: 75°F2002: 84°F2003: 82°F2004: 78°F2005: 82°F2007: 80°F2008: 86°F2009: 73°F2010: 91°F2011: 94°F2012: 93°F2013: 85°F2014: 85°F2015: 87°F2016: 85°F2017: 60°F2018: 85°F2019: 85°F2020: 76°F2021: 79°F2022: 85°F2023: 82°F2024: 87°F2025: 79°F93° forecast606570758085909510019201930194019501960197019801990200020102020
📖 Wilmington's full Climate Almanac →

The Numbers

Forecast high · Sep 193°F
Hottest this date since2012
This-date record99°F
This-date rank#14 of 106
Hottest at any time since2026
All-time record111°F (1934)
Odds to tie/break0.0% (daily)
Period of record1917–2026

Record Book

The hottest and coldest ever recorded at Wilmington in each calendar month, and for the whole 1917–2026 record — with the year each was set.
MonthRecord HighRecord Low
Jan74°FJan 25, 1950-25°FJan 17, 1982
Feb76°FFeb 10, 1932-20°FFeb 3, 1985
Mar88°FMar 25, 1929-10°FMar 10, 1984
Apr92°FApr 30, 194210°FApr 1, 1923
May97°FMay 10, 193624°FMay 10, 1966
Jun104°FJun 28, 194436°FJun 16, 1917
Jul111°FJul 21, 193440°FJul 1, 1988
Aug105°FAug 4, 193037°FAug 30, 1946
Sep104°FSep 14, 193926°FSep 26, 1928
Oct92°FOct 1, 192712°FOct 29, 1925
Nov82°FNov 3, 1946-6°FNov 30, 1958
Dec73°FDec 4, 1982-24°FDec 22, 1989
All-time111°FJul 21, 1934-25°FJan 17, 1982

2026 Records So Far

Records set or tied at Wilmington so far this year — through Aug 30.

Record Highs in 2026

0 broke
plus 1 tied — daily record highs set this year

Record Lows in 2026

1 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

80°F
record high minimum — the night it never cooled · Jul 21, 1934

Coldest high ever

-10°F
record low maximum — the day it never warmed · Jan 21, 1985
MonthWarmest lowColdest high
Jan58°FJan 12, 2005-10°FJan 21, 1985
Feb60°FFeb 11, 19326°FFeb 4, 1996
Mar65°FMar 31, 199812°FMar 2, 1980
Apr68°FApr 25, 192531°FApr 7, 1982
May72°FMay 12, 200041°FMay 2, 1940
Jun76°FJun 29, 193453°FJun 13, 1985
Jul80°FJul 21, 193465°FJul 3, 2016
Aug78°FAug 5, 193063°FAug 20, 1927
Sep72°FSep 8, 193948°FSep 30, 1924
Oct70°FOct 4, 198635°FOct 28, 1976
Nov62°FNov 1, 192912°FNov 30, 1929
Dec61°FDec 3, 1982-9°FDec 25, 1983
All-time80°FJul 21, 1934-10°FJan 21, 1985

Hot Streaks

Current run

0 days
consecutive days with a high ≥ 90°F

Longest ever

21 days
record run, ended Jul 20 1921

So far in 2026

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

Climate Normals

Normal high & low by month, from Wilmington's own 1991–2020 record. Today's normal high: 82°F · forecast is +11° vs normal.
Jan: 37°FJan: 21°FFeb: 40°FFeb: 24°FMar: 51°FMar: 32°FApr: 64°FApr: 42°FMay: 73°FMay: 52°FJun: 81°FJun: 61°FJul: 84°FJul: 63°FAug: 83°FAug: 61°FSep: 77°FSep: 54°FOct: 65°FOct: 44°FNov: 52°FNov: 34°FDec: 41°FDec: 27°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise5:03 AM
Sunset6:06 PM
Solar noon11:35 AM
Daylight13h 03m · losing 17 min/wk
Local standard time (no DST), level horizon.

Location

39.43°N, 83.78°W

Nearby Stations

Dayton, OH40 mi NWCincinnati, OH54 mi SWColumbus, OH61 mi NEHuntington, WV98 mi SEZanesville, OH106 mi ELexington, KY106 mi SW

The Last 6 Weeks

Wilmington'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.
Wilmington, OH — last six weeks of daily high

2026 So Far

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

Every Day Since 1917

Each cell is one day's high at Wilmington, coloured by temperature — 110 years of record, so heat waves read as warm streaks and cold snaps as blue.
Wilmington, OH daily high heat map 1917–2026

Days Above the Mark

How many days a year hit a given high at Wilmington — counted through Sep 1 each year, so you can see whether 2026 is running hot. Pick a threshold:
7 days ≥90°F so far in 2026 — tied for the 86th most in 110 years. Normal for this point: 21. Record: 66 in 1934.

Share Card

A ready-to-share summary of Wilmington's outlook — post it, or link this page.
Wilmington, OH hot share card
Download card
See Wilmington on coldestsince.com →