Monthly outlook for Theresa, NY: average high 74.3°, average low 57.7°. That is 0.5° below the climate normal for August. Precipitation is expected on 6 days (about 1.0 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 20 August (83.2°), the coolest 14 August (47.3°).
74.3°/57.7°
Average high / low
−0.5°
Below normal
6 / 6
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
72.1°
76°
-2.2°
19 August – 28 August
78.1°
74.1°
+2.2°
29 August – 7 September
at normal
72.8°
—
August records over 66 years
92.1°14 August 2002All-time high
43.2°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Philadelphia (8 mi).
Mon, 1071° / 64°0.35
71 °
Theresa, Monday, 10 August
Rain. High 71°, low 64°.
Pressure29.94 inHg
Wind7.9 mph SW
Humidity91%
Visibility6.2 mi
Dew point63°
Tue, 1178° / 62°0.02
78 °
Theresa, Tuesday, 11 August
Light rain. High 78°, low 62°.
Pressure29.85 inHg
Wind4.7 mph W
Humidity55%
Visibility6.2 mi
Dew point58°
Wed, 1275° / 61°0.09
75 °
Theresa, Wednesday, 12 August
Light rain. High 75°, low 61°.
Pressure29.77 inHg
Wind1.2 mph NW
Humidity76%
Visibility6.2 mi
Dew point62°
Thu, 1368° / 51°0.13
68 °
Theresa, Thursday, 13 August
Light rain. High 68°, low 51°.
Pressure29.74 inHg
Wind13.6 mph W
Humidity57%
Visibility—
Dew point51°
Fri, 1464° / 47°0.02
64 °
Theresa, Friday, 14 August
Light rain. High 64°, low 47°.
Pressure30.00 inHg
Wind12.2 mph NW
Humidity59%
Visibility—
Dew point47°
Sat, 1572° / 49°0
72 °
Theresa, Saturday, 15 August
Clear. High 72°, low 49°.
Pressure30.12 inHg
Wind11 mph NW
Humidity43%
Visibility—
Dew point46°
Sun, 1671° / 50°0
71 °
Theresa, Sunday, 16 August
Overcast. High 71°, low 50°.
Pressure30.15 inHg
Wind7.8 mph SW
Humidity54%
Visibility—
Dew point52°
Mon, 1769° / 58°0.07
69 °
Theresa, Monday, 17 August
Light rain. High 69°, low 58°.
Pressure30.00 inHg
Wind10.1 mph SW
Humidity78%
Visibility—
Dew point59°
Tue, 1873° / 54°0
73 °
Theresa, Tuesday, 18 August
Light rain. High 73°, low 54°.
Pressure30.06 inHg
Wind6.2 mph E
Humidity53%
Visibility—
Dew point53°
Wed, 1978° / 53°0
78 °
Theresa, Wednesday, 19 August
Overcast. High 78°, low 53°.
Pressure30.09 inHg
Wind6.4 mph SE
Humidity45%
Visibility—
Dew point52°
Thu, 2083° / 60°0
83 °
Theresa, Thursday, 20 August
Overcast. High 83°, low 60°.
Pressure29.91 inHg
Wind11.3 mph SW
Humidity54%
Visibility—
Dew point61°
Fri, 2183° / 68°0.19
83 °
Theresa, Friday, 21 August
Light rain. High 83°, low 68°.
Pressure29.77 inHg
Wind11.9 mph SW
Humidity77%
Visibility—
Dew point71°
Sat, 2277° / 58°0
77 °
Theresa, Saturday, 22 August
Mostly clear. High 77°, low 58°.
Pressure29.97 inHg
Wind7 mph N
Humidity47%
Visibility—
Dew point53°
Sun, 2374° / 62°0.02
74 °
Theresa, Sunday, 23 August
Light rain. High 74°, low 62°.
Pressure29.97 inHg
Wind10.2 mph N
Humidity69%
Visibility—
Dew point60°
Mon, 2473° / 58°0
73 °
Theresa, Monday, 24 August
Partly cloudy. High 73°, low 58°.
Pressure30.09 inHg
Wind14.7 mph NE
Humidity52%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2574° / 60°0.09
74 °
Theresa, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.09 in
Chance of precipitation30%
Record high86° (2021)
Record low47° (1989)
Wed, 2675° / 60°0.07
75 °
Theresa, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.07 in
Chance of precipitation33%
Record high85° (2021)
Record low49° (1977)
Thu, 2774° / 60°0.11
74 °
Theresa, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.11 in
Chance of precipitation43%
Record high85° (1993)
Record low46° (1989)
Fri, 2875° / 60°0.14
75 °
Theresa, Friday, 28 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.14 in
Chance of precipitation43%
Record high86° (2018)
Record low47° (1986)
Sat, 2974° / 60°0.13
74 °
Theresa, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high74°
Average low60°
Average precipitation0.13 in
Chance of precipitation42%
Record high88° (2022)
Record low44° (1986)
Sun, 3073° / 58°0.12
73 °
Theresa, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.12 in
Chance of precipitation42%
Record high87° (1991)
Record low43° (1965)
Mon, 3173° / 58°0.17
73 °
Theresa, Monday, 31 August
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.17 in
Chance of precipitation37%
Record high87° (1973)
Record low44° (1976)
Tue, 0173° / 58°0.06
73 °
Theresa, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.06 in
Chance of precipitation23%
Record high86° (2010)
Record low48° (1985)
Wed, 0273° / 58°0.13
73 °
Theresa, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.13 in
Chance of precipitation32%
Record high85° (2010)
Record low42° (2017)
Thu, 0373° / 58°0.16
73 °
Theresa, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.16 in
Chance of precipitation37%
Record high87° (2010)
Record low43° (1976)
Fri, 0472° / 58°0.09
72 °
Theresa, Friday, 4 September
Climate normal for this date — 60-year average.
Average high72°
Average low58°
Average precipitation0.09 in
Chance of precipitation30%
Record high92° (1999)
Record low46° (1987)
Sat, 0573° / 58°0.07
73 °
Theresa, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.07 in
Chance of precipitation32%
Record high90° (2018)
Record low44° (2000)
Sun, 0673° / 58°0.13
73 °
Theresa, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high73°
Average low58°
Average precipitation0.13 in
Chance of precipitation33%
Record high87° (2023)
Record low43° (2000)
Mon, 0772° / 58°0.08
72 °
Theresa, Monday, 7 September
Climate normal for this date — 60-year average.
Average high72°
Average low58°
Average precipitation0.08 in
Chance of precipitation37%
Record high90° (2007)
Record low45° (1982)
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 Theresa, 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 Theresa, 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.