Monthly outlook for Hartsville, MA: average high 77.3°, average low 69.9°. That is 0.8° above the climate normal for August. Precipitation is expected on 5 days (about 1.7 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 9 August (90.4°), the coolest 15 August (64.4°).
77.3°/69.9°
Average high / low
+0.8°
Above normal
5 / 5
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
78.2°
76.6°
+0.9°
19 August – 28 August
75.9°
74.8°
+0.6°
29 August – 7 September
at normal
73.3°
—
August records over 66 years
93°2 August 1975All-time high
51.3°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — North Falmouth (14 mi).
Mon, 1088° / 70°0
88 °
Hartsville, Monday, 10 August
Clear. High 88°, low 70°.
Pressure29.97 inHg
Wind5.4 mph SW
Humidity60%
Visibility6.2 mi
Dew point62°
Tue, 1179° / 73°0.02
79 °
Hartsville, Tuesday, 11 August
Light rain. High 79°, low 73°.
Pressure29.80 inHg
Wind10.4 mph SW
Humidity74%
Visibility6.2 mi
Dew point69°
Wed, 1278° / 72°0
78 °
Hartsville, Wednesday, 12 August
Overcast. High 78°, low 72°.
Pressure29.83 inHg
Wind3.2 mph SW
Humidity46%
Visibility6.2 mi
Dew point54°
Thu, 1377° / 73°0.06
77 °
Hartsville, Thursday, 13 August
Light rain. High 77°, low 73°.
Pressure29.68 inHg
Wind23 mph SW
Humidity78%
Visibility—
Dew point69°
Fri, 1475° / 67°0
75 °
Hartsville, Friday, 14 August
Clear. High 75°, low 67°.
Pressure29.91 inHg
Wind23 mph SW
Humidity48%
Visibility—
Dew point49°
Sat, 1575° / 64°0
75 °
Hartsville, Saturday, 15 August
Clear. High 75°, low 64°.
Pressure30.03 inHg
Wind17.2 mph N
Humidity47%
Visibility—
Dew point49°
Sun, 1674° / 67°0
74 °
Hartsville, Sunday, 16 August
Overcast. High 74°, low 67°.
Pressure30.15 inHg
Wind11 mph NW
Humidity41%
Visibility—
Dew point47°
Mon, 1773° / 68°0.83
73 °
Hartsville, Monday, 17 August
Heavy rain. High 73°, low 68°.
Pressure30.03 inHg
Wind22.7 mph SE
Humidity53%
Visibility—
Dew point55°
Tue, 1873° / 68°0.53
73 °
Hartsville, Tuesday, 18 August
Rain. High 73°, low 68°.
Pressure29.91 inHg
Wind25.2 mph S
Humidity79%
Visibility—
Dew point63°
Wed, 1972° / 70°0.01
72 °
Hartsville, Wednesday, 19 August
Light rain. High 72°, low 70°.
Pressure30.00 inHg
Wind15.7 mph SE
Humidity74%
Visibility—
Dew point63°
Thu, 2078° / 73°0.04
78 °
Hartsville, Thursday, 20 August
Light rain. High 78°, low 73°.
Pressure29.71 inHg
Wind14.3 mph S
Humidity84%
Visibility—
Dew point71°
Fri, 2175° / 71°0
75 °
Hartsville, Friday, 21 August
Overcast. High 75°, low 71°.
Pressure29.83 inHg
Wind13.1 mph SW
Humidity73%
Visibility—
Dew point63°
Sat, 2277° / 72°0
77 °
Hartsville, Saturday, 22 August
Clear. High 77°, low 72°.
Pressure29.97 inHg
Wind13.9 mph SW
Humidity68%
Visibility—
Dew point64°
Sun, 2379° / 74°0.2
79 °
Hartsville, Sunday, 23 August
Rain. High 79°, low 74°.
Pressure29.83 inHg
Wind30.3 mph SW
Humidity79%
Visibility—
Dew point71°
Mon, 2475° / 66°0.03
75 °
Hartsville, Monday, 24 August
Light rain. High 75°, low 66°.
Pressure30.03 inHg
Wind16 mph NE
Humidity87%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2575° / 64°0.08
75 °
Hartsville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.08 in
Chance of precipitation23%
Record high85° (1993)
Record low56° (1971)
Wed, 2675° / 65°0.07
75 °
Hartsville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.07 in
Chance of precipitation22%
Record high85° (1993)
Record low56° (1981)
Thu, 2775° / 65°0.06
75 °
Hartsville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.06 in
Chance of precipitation25%
Record high86° (1993)
Record low56° (2019)
Fri, 2875° / 66°0.12
75 °
Hartsville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high75°
Average low66°
Average precipitation0.12 in
Chance of precipitation32%
Record high84° (1973)
Record low56° (1986)
Sat, 2974° / 65°0.17
74 °
Hartsville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high74°
Average low65°
Average precipitation0.17 in
Chance of precipitation30%
Record high86° (2016)
Record low51° (1982)
Sun, 3075° / 64°0.11
75 °
Hartsville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.11 in
Chance of precipitation28%
Record high87° (1973)
Record low51° (1965)
Mon, 3174° / 64°0.05
74 °
Hartsville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high74°
Average low64°
Average precipitation0.05 in
Chance of precipitation17%
Record high87° (2010)
Record low53° (1976)
Tue, 0173° / 64°0.06
73 °
Hartsville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high73°
Average low64°
Average precipitation0.06 in
Chance of precipitation18%
Record high86° (2010)
Record low55° (2017)
Wed, 0273° / 63°0.15
73 °
Hartsville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low63°
Average precipitation0.15 in
Chance of precipitation25%
Record high86° (1966)
Record low53° (2017)
Thu, 0373° / 63°0.17
73 °
Hartsville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high73°
Average low63°
Average precipitation0.17 in
Chance of precipitation33%
Record high84° (1973)
Record low53° (1967)
Fri, 0473° / 63°0.12
73 °
Hartsville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high73°
Average low63°
Average precipitation0.12 in
Chance of precipitation27%
Record high86° (2023)
Record low55° (1997)
Sat, 0573° / 63°0.06
73 °
Hartsville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high73°
Average low63°
Average precipitation0.06 in
Chance of precipitation18%
Record high87° (2023)
Record low53° (1990)
Sun, 0672° / 63°0.15
72 °
Hartsville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high72°
Average low63°
Average precipitation0.15 in
Chance of precipitation32%
Record high88° (2023)
Record low52° (1965)
Mon, 0773° / 62°0.1
73 °
Hartsville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high73°
Average low62°
Average precipitation0.1 in
Chance of precipitation32%
Record high86° (2023)
Record low52° (2000)
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 Hartsville, MA 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 Hartsville, MA 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.