34.741°N, 118.213°W · station WJFthr · 82 years of record
84°F
HOTTEST OCT 17 SINCE 2024
forecast high · Oct 17
7-Day Forecast
NWS NDFD forecast high temperature for Lancaster.
This Day in History
Every year's high 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 hottest on record.
Ranks
#28 / 78
warmest Oct 17 in 78 yrs of record
Warmest Oct 17 ever
96°F
set in 1958
Coolest Oct 17 ever
58°F
set in 1971
Forecast high 84°F — 28th warmest Oct 17 of 78 years · record 96°F (1958) · warmest since 2024.
Ranks
#28 / 78
warmest Oct 18 in 78 yrs of record
Warmest Oct 18 ever
95°F
set in 2020
Coolest Oct 18 ever
57°F
set in 1984
Forecast high 83°F — 28th warmest Oct 18 of 78 years · record 95°F (2020) · warmest since 2023.
Ranks
#25 / 78
warmest Oct 19 in 78 yrs of record
Warmest Oct 19 ever
94°F
set in 1988
Coolest Oct 19 ever
53°F
set in 1949
Forecast high 84°F — 25th warmest Oct 19 of 78 years · record 94°F (1988) · warmest since 2025.
Ranks
#63 / 78
warmest Oct 20 in 78 yrs of record
Warmest Oct 20 ever
95°F
set in 2003
Coolest Oct 20 ever
54°F
set in 1957
Forecast high 71°F — 63rd warmest Oct 20 of 78 years · record 95°F (2003) · warmest since 2025.
Ranks
#72 / 78
warmest Oct 21 in 78 yrs of record
Warmest Oct 21 ever
93°F
set in 2003
Coolest Oct 21 ever
56°F
set in 1957
Forecast high 65°F — 72nd warmest Oct 21 of 78 years · record 93°F (2003) · warmest since 2025.
Ranks
#74 / 78
warmest Oct 22 in 78 yrs of record
Warmest Oct 22 ever
95°F
set in 2003
Coolest Oct 22 ever
61°F
set in 1989
Forecast high 65°F — 74th warmest Oct 22 of 78 years · record 95°F (2003) · warmest since 2025.
Ranks
#70 / 78
warmest Oct 23 in 78 yrs of record
Warmest Oct 23 ever
93°F
set in 1959
Coolest Oct 23 ever
63°F
set in 1975
Forecast high 67°F — 70th warmest Oct 23 of 78 years · record 93°F (1959) · warmest 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 Oct 15.
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
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
89 days
record run, ended Sep 15 2018
So far in 2026
117 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from Lancaster's own 1991–2020 record. Today's normal high: 80°F · forecast is +4° vs normal.
Lancaster'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 Lancaster's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.