34.741°N, 118.213°W · station WJFthr · 82 years of record
55°F
COLDEST SEP 2 SINCE 2012
forecast low · Sep 2
7-Day Forecast
NWS NDFD forecast low temperature for Lancaster.
This Day in History
Every year's low on each of the next 7 forecast dates at Lancaster — toggle a day below. The forecast line shows where it lands; the ringed bar is the coldest on record.
Ranks
#14 / 80
coldest Sep 2 in 80 yrs of record
Coldest Sep 2 ever
48°F
set in 1964
Mildest Sep 2 ever
77°F
set in 1996
Forecast low 55°F — 14th coldest Sep 2 of 80 years · record 48°F (1964) · coldest since 2012.
Ranks
#26 / 80
coldest Sep 3 in 80 yrs of record
Coldest Sep 3 ever
45°F
set in 1964
Mildest Sep 3 ever
73°F
set in 1996
Forecast low 58°F — 26th coldest Sep 3 of 80 years · record 45°F (1964) · coldest since 2021.
Ranks
#27 / 80
coldest Sep 4 in 80 yrs of record
Coldest Sep 4 ever
43°F
set in 1964
Mildest Sep 4 ever
73°F
set in 2007
Forecast low 59°F — 27th coldest Sep 4 of 80 years · record 43°F (1964) · coldest since 2021.
Ranks
#35 / 80
coldest Sep 5 in 80 yrs of record
Coldest Sep 5 ever
47°F
set in 2004
Mildest Sep 5 ever
75°F
set in 1974
Forecast low 59°F — 35th coldest Sep 5 of 80 years · record 47°F (2004) · coldest since 2023.
Ranks
#49 / 80
coldest Sep 6 in 80 yrs of record
Coldest Sep 6 ever
45°F
set in 1970
Mildest Sep 6 ever
73°F
set in 2012
Forecast low 63°F — 49th coldest Sep 6 of 80 years · record 45°F (1970) · coldest since 2025.
Ranks
#51 / 80
coldest Sep 7 in 80 yrs of record
Coldest Sep 7 ever
45°F
set in 2000
Mildest Sep 7 ever
75°F
set in 1984
Forecast low 63°F — 51st coldest Sep 7 of 80 years · record 45°F (2000) · coldest since 2025.
Ranks
#58 / 80
coldest Sep 8 in 80 yrs of record
Coldest Sep 8 ever
46°F
set in 1946
Mildest Sep 8 ever
74°F
set in 2022
Forecast low 63°F — 58th coldest Sep 8 of 80 years · record 46°F (1946) · coldest since 2025.
The hottest and coldest ever recorded at Lancaster in each calendar month, and for the whole 1945–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
80°FJan 7, 1969
3°FJan 14, 2007
Feb
84°FFeb 13, 2014
11°FFeb 3, 1948
Mar
95°FMar 20, 2026
17°FMar 4, 2002
Apr
98°FApr 22, 1949
23°FApr 3, 1945
May
106°FMay 28, 2003
32°FMay 1, 1967
Jun
115°FJun 30, 2013
38°FJun 2, 1967
Jul
115°FJul 7, 2024
45°FJul 5, 1948
Aug
113°FAug 19, 1950
43°FAug 28, 1945
Sep
113°FSep 2, 2022
27°FSep 26, 1948
Oct
104°FOct 2, 2024
18°FOct 31, 2019
Nov
90°FNov 1, 1949
12°FNov 17, 1958
Dec
85°FDec 4, 1958
2°FDec 24, 1984
All-time
115°FJun 30, 2013
2°FDec 24, 1984
2026 Records So Far
Records set or tied at Lancaster so far this year — through Aug 30.
Record Highs in 2026
14 broke
plus 2 tied — daily record highs set this year
Monthly high records this year: Feb (84°F), Mar (95°F)
Record Lows in 2026
2 broke
plus 1 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
86°F
record high minimum — the night it never cooled · Jul 11, 2021
Coldest high ever
29°F
record low maximum — the day it never warmed · Jan 11, 1949
Month
Warmest low
Coldest high
Jan
56°FJan 13, 1980
29°FJan 11, 1949
Feb
56°FFeb 15, 1982
33°FFeb 8, 1989
Mar
60°FMar 18, 2007
38°FMar 7, 1952
Apr
69°FApr 20, 1950
45°FApr 12, 1956
May
77°FMay 30, 1984
52°FMay 8, 1977
Jun
82°FJun 23, 1954
58°FJun 2, 1999
Jul
86°FJul 11, 2021
71°FJul 17, 1987
Aug
81°FAug 3, 1993
70°FAug 15, 1976
Sep
77°FSep 1, 1996
61°FSep 24, 1986
Oct
69°FOct 4, 2012
50°FOct 16, 1946
Nov
59°FNov 3, 1988
37°FNov 17, 1964
Dec
57°FDec 23, 1964
31°FDec 21, 1984
All-time
86°FJul 11, 2021
29°FJan 11, 1949
Cold Streaks
Current run
0 days
consecutive days with a low ≤ 32°F
Longest ever
35 days
record run, ended Jan 9 1968
So far in 2026
40 days
days with a low ≤ 32°F this year
Climate Normals
Normal low & low by month, from Lancaster's own 1991–2020 record. Today's normal low: 62°F · forecast is -8° vs normal.
Lancaster's observed daily low 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 Lancaster's own record — the record low, the normal, and the full span ever seen. A shareable look at where the year stands.