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As of 06:10 CDT

Weather in Hartsville, IL

67°Current weather

Hartsville, Sunday, 9 August, 06:10

Mostly clear. Feels like 68°. High 91°, low 67°.

Pressure30.06 inHg
Wind3.3 mph S
Humidity96%
Visibility6.2 mi
Dew point67°
Mon, 1095° / 74°0Clear
95 °Clear

Hartsville, Monday, 10 August

Clear. High 95°, low 74°.

Pressure30.03 inHg
Wind11.7 mph SW
Humidity46%
Visibility6.2 mi
Dew point69°
Tue, 1199° / 74°0Partly cloudy
99 °Partly cloudy

Hartsville, Tuesday, 11 August

Partly cloudy. High 99°, low 74°.

Pressure29.94 inHg
Wind12.9 mph SW
Humidity41%
Visibility6.2 mi
Dew point68°
Wed, 1299° / 71°0.88Heavy rain
99 °Heavy rain

Hartsville, Wednesday, 12 August

Heavy rain. High 99°, low 71°.

Pressure29.83 inHg
Wind12.5 mph SW
Humidity42%
Visibility6.2 mi
Dew point68°
Thu, 1391° / 71°0.18Light rain
91 °Light rain

Hartsville, Thursday, 13 August

Light rain. High 91°, low 71°.

Pressure29.91 inHg
Wind7.6 mph NE
Humidity54%
Visibility—
Dew point68°
Fri, 1483° / 68°0.14Light rain
83 °Light rain

Hartsville, Friday, 14 August

Light rain. High 83°, low 68°.

Pressure30.03 inHg
Wind10.2 mph NE
Humidity86%
Visibility—
Dew point69°
Sat, 1591° / 66°0.1Light rain
91 °Light rain

Hartsville, Saturday, 15 August

Light rain. High 91°, low 66°.

Pressure30.12 inHg
Wind8.8 mph E
Humidity60%
Visibility—
Dew point68°
Sun, 16102° / 71°0Overcast
102 °Overcast

Hartsville, Sunday, 16 August

Overcast. High 102°, low 71°.

Pressure30.00 inHg
Wind12 mph NW
Humidity34%
Visibility—
Dew point62°
Mon, 1791° / 71°0.06Light rain
91 °Light rain

Hartsville, Monday, 17 August

Light rain. High 91°, low 71°.

Pressure30.03 inHg
Wind7.2 mph NE
Humidity53%
Visibility—
Dew point67°
Tue, 1893° / 69°0.02Light rain
93 °Light rain

Hartsville, Tuesday, 18 August

Light rain. High 93°, low 69°.

Pressure29.97 inHg
Wind6.5 mph E
Humidity45%
Visibility—
Dew point65°
Wed, 1998° / 73°0Overcast
98 °Overcast

Hartsville, Wednesday, 19 August

Overcast. High 98°, low 73°.

Pressure29.94 inHg
Wind8.5 mph S
Humidity45%
Visibility—
Dew point68°
Thu, 20110° / 81°0Overcast
110 °Overcast

Hartsville, Thursday, 20 August

Overcast. High 110°, low 81°.

Pressure29.88 inHg
Wind10.4 mph SW
Humidity26%
Visibility—
Dew point59°
Fri, 21111° / 79°0Clear
111 °Clear

Hartsville, Friday, 21 August

Clear. High 111°, low 79°.

Pressure29.85 inHg
Wind10 mph SW
Humidity19%
Visibility—
Dew point54°
Sat, 22109° / 78°0Clear
109 °Clear

Hartsville, Saturday, 22 August

Clear. High 109°, low 78°.

Pressure29.88 inHg
Wind9 mph S
Humidity23%
Visibility—
Dew point58°
Sun, 23108° / 78°0.02Light rain
108 °Light rain

Hartsville, Sunday, 23 August

Light rain. High 108°, low 78°.

Pressure29.88 inHg
Wind9.1 mph SW
Humidity25%
Visibility—
Dew point61°
Mon, 24103° / 79°0Overcast
103 °Overcast

Hartsville, Monday, 24 August

Overcast. High 103°, low 79°.

Pressure29.97 inHg
Wind6.2 mph E
Humidity38%
Visibility—
Dew point67°

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, IL 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, IL 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.