40.196°N, 76.772°W · station MDTthr · 139 years of record
90°F
HOTTEST SEP 1 SINCE 2016
forecast high · Sep 1
7-Day Forecast
NWS NDFD forecast high temperature for Middletown-Harrisburg.
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.
Ranks
#56 / 138
warmest Sep 2 in 138 yrs of record
Warmest Sep 2 ever
102°F
set in 1953
Coolest Sep 2 ever
60°F
set in 1935
Forecast high 84°F — 56th warmest Sep 2 of 138 years · record 102°F (1953) · warmest since 2024.
Ranks
#23 / 138
warmest Sep 3 in 138 yrs of record
Warmest Sep 3 ever
102°F
set in 1953
Coolest Sep 3 ever
60°F
set in 1935
Forecast high 88°F — 23rd warmest Sep 3 of 138 years · record 102°F (1953) · warmest since 2023.
Ranks
#35 / 138
warmest Sep 4 in 138 yrs of record
Warmest Sep 4 ever
97°F
set in 2023
Coolest Sep 4 ever
66°F
set in 1926
Forecast high 85°F — 35th warmest Sep 4 of 138 years · record 97°F (2023) · warmest since 2023.
Ranks
#65 / 138
warmest Sep 5 in 138 yrs of record
Warmest Sep 5 ever
94°F
set in 2018
Coolest Sep 5 ever
64°F
set in 1963
Forecast high 81°F — 65th warmest Sep 5 of 138 years · record 94°F (2018) · warmest since 2025.
Ranks
#77 / 138
warmest Sep 6 in 138 yrs of record
Warmest Sep 6 ever
96°F
set in 1983
Coolest Sep 6 ever
62°F
set in 1924
Forecast high 79°F — 77th warmest Sep 6 of 138 years · record 96°F (1983) · warmest since 2025.
Ranks
#65 / 138
warmest Sep 7 in 138 yrs of record
Warmest Sep 7 ever
96°F
set in 1985
Coolest Sep 7 ever
60°F
set in 1928
Forecast high 80°F — 65th warmest Sep 7 of 138 years · record 96°F (1985) · warmest since 2023.
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.
Month
Record High
Record Low
Jan
73°FJan 14, 1932
-22°FJan 21, 1994
Feb
79°FFeb 21, 2018
-13°FFeb 10, 1899
Mar
87°FMar 30, 1998
-1°FMar 7, 2015
Apr
93°FApr 25, 1915
11°FApr 1, 1923
May
97°FMay 31, 1939
30°FMay 10, 2020
Jun
100°FJun 29, 1934
40°FJun 11, 1980
Jul
107°FJul 3, 1966
49°FJul 12, 1945
Aug
104°FAug 6, 1918
45°FAug 31, 1976
Sep
102°FSep 2, 1953
30°FSep 24, 1963
Oct
97°FOct 5, 1941
23°FOct 24, 1969
Nov
84°FNov 1, 1950
10°FNov 30, 1929
Dec
75°FDec 29, 1984
-8°FDec 23, 1960
All-time
107°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
Month
Warmest low
Coldest high
Jan
59°FJan 8, 1998
-1°FJan 19, 1994
Feb
51°FFeb 24, 1985
0°FFeb 10, 1899
Mar
66°FMar 16, 1990
16°FMar 6, 1901
Apr
69°FApr 19, 1985
33°FApr 3, 1896
May
74°FMay 31, 1895
43°FMay 5, 1917
Jun
79°FJun 27, 1952
53°FJun 2, 1907
Jul
81°FJul 24, 2010
62°FJul 3, 1978
Aug
83°FAug 9, 1900
59°FAug 26, 1940
Sep
76°FSep 4, 1970
48°FSep 28, 1984
Oct
73°FOct 5, 1898
36°FOct 30, 1925
Nov
64°FNov 4, 1961
21°FNov 30, 1929
Dec
57°FDec 29, 1984
5°FDec 29, 1917
All-time
83°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.
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.
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.
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.
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.