Monthly outlook for Lancaster, NY: average high 77.7°, average low 59.4°. That is 0.5° above the climate normal for August. Precipitation is expected on 8 days (about 1.7 inches), against a normal of 6 days and 1.7 inches. The warmest day looks like 9 August (83.7°), the coolest 22 August (50°).
77.7°/59.4°
Average high / low
+0.5°
Above normal
8 / 6
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
78°
77.4°
+0.3°
18 August – 27 August
77.2°
76°
+0.6°
28 August – 6 September
at normal
74.9°
—
August records over 66 years
92.1°3 August 1988All-time high
45.5°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Amherst (9 mi).
Sun, 0984° / 66°0
84 °
Lancaster, Sunday, 9 August
Light rain. High 84°, low 66°.
Pressure30.03 inHg
Wind4.8 mph SW
Humidity43%
Visibility6.2 mi
Dew point54°
Mon, 1079° / 67°0.13
79 °
Lancaster, Monday, 10 August
Light rain. High 79°, low 67°.
Pressure29.91 inHg
Wind14.4 mph SW
Humidity67%
Visibility6.2 mi
Dew point66°
Tue, 1184° / 62°0.54
84 °
Lancaster, Tuesday, 11 August
Heavy rain. High 84°, low 62°.
Pressure29.88 inHg
Wind7.6 mph W
Humidity51%
Visibility6.2 mi
Dew point60°
Wed, 1279° / 62°0.25
79 °
Lancaster, Wednesday, 12 August
Light rain. High 79°, low 62°.
Pressure29.74 inHg
Wind5.8 mph W
Humidity70%
Visibility6.2 mi
Dew point66°
Thu, 1368° / 54°0.04
68 °
Lancaster, Thursday, 13 August
Light rain. High 68°, low 54°.
Pressure29.88 inHg
Wind12.3 mph NW
Humidity52%
Visibility—
Dew point48°
Fri, 1472° / 51°0.02
72 °
Lancaster, Friday, 14 August
Light rain. High 72°, low 51°.
Pressure30.03 inHg
Wind11.7 mph W
Humidity46%
Visibility—
Dew point48°
Sat, 1573° / 53°0
73 °
Lancaster, Saturday, 15 August
Clear. High 73°, low 53°.
Pressure30.24 inHg
Wind9.9 mph NW
Humidity45%
Visibility—
Dew point49°
Sun, 1678° / 56°0
78 °
Lancaster, Sunday, 16 August
Overcast. High 78°, low 56°.
Pressure30.15 inHg
Wind6.4 mph W
Humidity43%
Visibility—
Dew point51°
Mon, 1781° / 59°0
81 °
Lancaster, Monday, 17 August
Overcast. High 81°, low 59°.
Pressure30.03 inHg
Wind5.4 mph S
Humidity43%
Visibility—
Dew point54°
Tue, 1882° / 59°0
82 °
Lancaster, Tuesday, 18 August
Overcast. High 82°, low 59°.
Pressure30.00 inHg
Wind6.8 mph SW
Humidity40%
Visibility—
Dew point53°
Wed, 1982° / 64°0.47
82 °
Lancaster, Wednesday, 19 August
Rain. High 82°, low 64°.
Pressure29.74 inHg
Wind16.3 mph SW
Humidity51%
Visibility—
Dew point60°
Thu, 2071° / 59°0.08
71 °
Lancaster, Thursday, 20 August
Light rain. High 71°, low 59°.
Pressure29.71 inHg
Wind19.6 mph NW
Humidity62%
Visibility—
Dew point55°
Fri, 2171° / 54°0
71 °
Lancaster, Friday, 21 August
Clear. High 71°, low 54°.
Pressure29.97 inHg
Wind11.8 mph NW
Humidity40%
Visibility—
Dew point44°
Sat, 2275° / 50°0
75 °
Lancaster, Saturday, 22 August
Overcast. High 75°, low 50°.
Pressure30.03 inHg
Wind6.1 mph SE
Humidity33%
Visibility—
Dew point42°
Sun, 2381° / 65°0.09
81 °
Lancaster, Sunday, 23 August
Light rain. High 81°, low 65°.
Pressure29.83 inHg
Wind18.1 mph SW
Humidity57%
Visibility—
Dew point63°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2476° / 62°0.08
76 °
Lancaster, Monday, 24 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.08 in
Chance of precipitation27%
Record high85° (2007)
Record low48° (1971)
Tue, 2576° / 62°0.12
76 °
Lancaster, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.12 in
Chance of precipitation32%
Record high87° (2012)
Record low52° (2019)
Wed, 2677° / 63°0.06
77 °
Lancaster, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.06 in
Chance of precipitation32%
Record high86° (1962)
Record low48° (2017)
Thu, 2777° / 64°0.14
77 °
Lancaster, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.14 in
Chance of precipitation43%
Record high88° (2024)
Record low51° (2017)
Fri, 2876° / 64°0.17
76 °
Lancaster, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.17 in
Chance of precipitation45%
Record high86° (1973)
Record low50° (1986)
Sat, 2976° / 63°0.11
76 °
Lancaster, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low63°
Average precipitation0.11 in
Chance of precipitation33%
Record high87° (2022)
Record low49° (1982)
Sun, 3075° / 62°0.06
75 °
Lancaster, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.06 in
Chance of precipitation33%
Record high88° (1991)
Record low46° (1965)
Mon, 3175° / 61°0.11
75 °
Lancaster, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.11 in
Chance of precipitation38%
Record high89° (1962)
Record low48° (2025)
Tue, 0175° / 61°0.06
75 °
Lancaster, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.06 in
Chance of precipitation22%
Record high87° (1973)
Record low48° (2023)
Wed, 0275° / 61°0.16
75 °
Lancaster, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low61°
Average precipitation0.16 in
Chance of precipitation40%
Record high86° (2011)
Record low46° (2017)
Thu, 0374° / 61°0.11
74 °
Lancaster, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.11 in
Chance of precipitation38%
Record high88° (1973)
Record low49° (1976)
Fri, 0474° / 61°0.11
74 °
Lancaster, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.11 in
Chance of precipitation30%
Record high89° (1973)
Record low49° (1987)
Sat, 0574° / 61°0.09
74 °
Lancaster, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.09 in
Chance of precipitation30%
Record high88° (2018)
Record low50° (1963)
Sun, 0674° / 61°0.09
74 °
Lancaster, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low61°
Average precipitation0.09 in
Chance of precipitation37%
Record high89° (2007)
Record low45° (1994)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Lancaster, NY are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Lancaster, NY since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.