As of 14:21 EDT

Weather in Hartsville, PA

90°

Hartsville, Sunday, 9 August, 14:21

Clear. Feels like 96°. High 90°, low 72°.

Pressure29.97 inHg

Wind5 mph W

Humidity55%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

Monthly outlook for Hartsville, PA: average high 83.4°, average low 66.8°. That is 0.6° above the climate normal for August. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 11 August (90.4°), the coolest 15 August (60°).

83.4°/66.8°

Average high / low

+0.6°

Above normal

2 / 6

Wet days / normal

0.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	82.5°	83°	-0.3°
19 August – 28 August	84.8°	81.6°	+1.8°
29 August – 7 September	at normal	80.3°	—

August records over 66 years

99.7°9 August 2001All-time high

47.1°30 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Roslyn (7 mi).

Mon, 1090° / 71°

90 °

Hartsville, Monday, 10 August

Mostly clear. High 90°, low 71°.

Pressure29.97 inHg

Wind5.4 mph W

Humidity40%

Visibility6.2 mi

Dew point62°

Tue, 1190° / 71°

0.01

90 °

Hartsville, Tuesday, 11 August

Light rain. High 90°, low 71°.

Pressure29.85 inHg

Wind8.3 mph NW

Humidity52%

Visibility6.2 mi

Dew point66°

Wed, 1287° / 70°

87 °

Hartsville, Wednesday, 12 August

Overcast. High 87°, low 70°.

Pressure29.83 inHg

Wind2.1 mph S

Humidity45%

Visibility6.2 mi

Dew point58°

Thu, 1385° / 72°

0.01

85 °

Hartsville, Thursday, 13 August

Light rain. High 85°, low 72°.

Pressure29.80 inHg

Wind14.2 mph W

Humidity48%

Visibility6.2 mi

Dew point62°

Fri, 1477° / 65°

77 °

Hartsville, Friday, 14 August

Overcast. High 77°, low 65°.

Pressure30.03 inHg

Wind8.9 mph SW

Humidity35%

Visibility—

Dew point46°

Sat, 1578° / 60°

78 °

Hartsville, Saturday, 15 August

Overcast. High 78°, low 60°.

Pressure30.15 inHg

Wind11.5 mph N

Humidity30%

Visibility—

Dew point41°

Sun, 1678° / 61°

78 °

Hartsville, Sunday, 16 August

Overcast. High 78°, low 61°.

Pressure30.15 inHg

Wind5.8 mph W

Humidity33%

Visibility—

Dew point45°

Mon, 1767° / 62°

0.17

67 °

Hartsville, Monday, 17 August

Light rain. High 67°, low 62°.

Pressure29.91 inHg

Wind7.3 mph NW

Humidity97%

Visibility—

Dew point66°

Tue, 1883° / 61°

83 °

Hartsville, Tuesday, 18 August

Overcast. High 83°, low 61°.

Pressure29.94 inHg

Wind6.1 mph N

Humidity35%

Visibility—

Dew point49°

Wed, 1985° / 69°

85 °

Hartsville, Wednesday, 19 August

Light rain. High 85°, low 69°.

Pressure29.85 inHg

Wind9.8 mph S

Humidity41%

Visibility—

Dew point55°

Thu, 2084° / 68°

0.01

84 °

Hartsville, Thursday, 20 August

Light rain. High 84°, low 68°.

Pressure29.71 inHg

Wind10.8 mph W

Humidity47%

Visibility—

Dew point60°

Fri, 2183° / 62°

83 °

Hartsville, Friday, 21 August

Mostly clear. High 83°, low 62°.

Pressure29.85 inHg

Wind6.6 mph N

Humidity32%

Visibility—

Dew point47°

Sat, 2289° / 67°

89 °

Hartsville, Saturday, 22 August

Clear. High 89°, low 67°.

Pressure29.94 inHg

Wind12.4 mph SW

Humidity36%

Visibility—

Dew point55°

Sun, 2386° / 73°

0.14

86 °

Hartsville, Sunday, 23 August

Light rain. High 86°, low 73°.

Pressure29.88 inHg

Wind14.8 mph W

Humidity38%

Visibility—

Dew point56°

Mon, 2481° / 65°

81 °

Hartsville, Monday, 24 August

Clear. High 81°, low 65°.

Pressure30.15 inHg

Wind7 mph N

Humidity28%

Visibility—

Dew point42°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 2582° / 65°

0.06

82 °

Hartsville, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.06 in

Chance of precipitation15%

Record high96° (1968)

Record low53° (1987)

Wed, 2683° / 65°

0.07

83 °

Hartsville, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high83°

Average low65°

Average precipitation0.07 in

Chance of precipitation23%

Record high92° (1993)

Record low55° (1963)

Thu, 2783° / 67°

0.2

83 °

Hartsville, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high83°

Average low67°

Average precipitation0.2 in

Chance of precipitation33%

Record high92° (2020)

Record low56° (1963)

Fri, 2882° / 67°

0.25

82 °

Hartsville, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low67°

Average precipitation0.25 in

Chance of precipitation43%

Record high95° (1973)

Record low56° (1986)

Sat, 2981° / 66°

0.14

81 °

Hartsville, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high81°

Average low66°

Average precipitation0.14 in

Chance of precipitation33%

Record high94° (2010)

Record low49° (1982)

Sun, 3082° / 65°

0.06

82 °

Hartsville, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.06 in

Chance of precipitation30%

Record high94° (1973)

Record low47° (1986)

Mon, 3181° / 65°

0.08

81 °

Hartsville, Monday, 31 August

Climate normal for this date — 60-year average.

Average high81°

Average low65°

Average precipitation0.08 in

Chance of precipitation25%

Record high96° (2010)

Record low51° (1976)

Tue, 0180° / 64°

0.13

80 °

Hartsville, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.13 in

Chance of precipitation33%

Record high94° (2010)

Record low55° (1967)

Wed, 0280° / 64°

0.13

80 °

Hartsville, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.13 in

Chance of precipitation33%

Record high94° (1980)

Record low53° (1970)

Thu, 0380° / 64°

0.17

80 °

Hartsville, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.17 in

Chance of precipitation30%

Record high93° (2015)

Record low50° (1967)

Fri, 0480° / 64°

0.12

80 °

Hartsville, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.12 in

Chance of precipitation28%

Record high94° (2023)

Record low53° (1997)

Sat, 0580° / 64°

0.07

80 °

Hartsville, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.07 in

Chance of precipitation27%

Record high94° (2023)

Record low53° (1997)

Sun, 0679° / 64°

0.22

79 °

Hartsville, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high79°

Average low64°

Average precipitation0.22 in

Chance of precipitation35%

Record high94° (2023)

Record low51° (1984)

Mon, 0780° / 63°

0.13

80 °

Hartsville, Monday, 7 September

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.13 in

Chance of precipitation28%

Record high91° (1998)

Record low48° (1984)

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, PA 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, PA 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.