As of 07:46 CDT

Weather in Hartsburg, IL

73°

Hartsburg, Sunday, 9 August, 07:46

Partly cloudy. Feels like 75°. High 92°, low 69°.

Pressure30.00 inHg

Wind7.7 mph S

Humidity100%

Visibility6.2 mi

Dew point73°

See detailed hourly forecast

Monthly outlook for Hartsburg, IL: average high 89.3°, average low 70.5°. That is 3.8° above the climate normal for August. Precipitation is expected on 7 days (about 4.1 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 August (106.1°), the coolest 15 August (61.8°).

89.3°/70.5°

Average high / low

+3.8°

Above normal

7 / 5

Wet days / normal

4.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	84.5°	82.5°	+1.1°
19 August – 28 August	97.3°	82.9°	+8°
29 August – 7 September	at normal	81.4°	—

August records over 66 years

98.1°3 August 1964All-time high

46.2°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Broadwell (13 mi).

Mon, 1096° / 77°

96 °

Hartsburg, Monday, 10 August

Overcast. High 96°, low 77°.

Pressure29.91 inHg

Wind11.7 mph SW

Humidity51%

Visibility6.2 mi

Dew point70°

Tue, 1195° / 72°

0.16

95 °

Hartsburg, Tuesday, 11 August

Rain. High 95°, low 72°.

Pressure29.85 inHg

Wind15.3 mph SW

Humidity51%

Visibility6.2 mi

Dew point70°

Wed, 1289° / 72°

0.19

89 °

Hartsburg, Wednesday, 12 August

Rain. High 89°, low 72°.

Pressure29.85 inHg

Wind3.8 mph N

Humidity65%

Visibility6.2 mi

Dew point73°

Thu, 1375° / 68°

2.6

75 °

Hartsburg, Thursday, 13 August

Heavy rain. High 75°, low 68°.

Pressure29.91 inHg

Wind17.4 mph NE

Humidity95%

Visibility—

Dew point71°

Fri, 1475° / 63°

0.72

75 °

Hartsburg, Friday, 14 August

Rain. High 75°, low 63°.

Pressure30.06 inHg

Wind15.3 mph E

Humidity81%

Visibility—

Dew point67°

Sat, 1575° / 62°

0.17

75 °

Hartsburg, Saturday, 15 August

Light rain. High 75°, low 62°.

Pressure30.18 inHg

Wind11.5 mph E

Humidity80%

Visibility—

Dew point65°

Sun, 1681° / 66°

0.13

81 °

Hartsburg, Sunday, 16 August

Light rain. High 81°, low 66°.

Pressure30.06 inHg

Wind7.4 mph E

Humidity76%

Visibility—

Dew point70°

Mon, 1782° / 66°

82 °

Hartsburg, Monday, 17 August

Partly cloudy. High 82°, low 66°.

Pressure30.09 inHg

Wind6.3 mph E

Humidity62%

Visibility—

Dew point65°

Tue, 1884° / 66°

84 °

Hartsburg, Tuesday, 18 August

Clear. High 84°, low 66°.

Pressure30.00 inHg

Wind9 mph SE

Humidity58%

Visibility—

Dew point64°

Wed, 1995° / 72°

95 °

Hartsburg, Wednesday, 19 August

Partly cloudy. High 95°, low 72°.

Pressure29.88 inHg

Wind17.3 mph S

Humidity56%

Visibility—

Dew point71°

Thu, 20106° / 77°

106 °

Hartsburg, Thursday, 20 August

Overcast. High 106°, low 77°.

Pressure29.77 inHg

Wind10.3 mph W

Humidity27%

Visibility—

Dew point60°

Fri, 2192° / 74°

92 °

Hartsburg, Friday, 21 August

Overcast. High 92°, low 74°.

Pressure29.88 inHg

Wind12.5 mph NE

Humidity64%

Visibility—

Dew point74°

Sat, 22105° / 74°

0.02

105 °

Hartsburg, Saturday, 22 August

Light rain. High 105°, low 74°.

Pressure29.83 inHg

Wind18.8 mph N

Humidity37%

Visibility—

Dew point65°

Sun, 23101° / 81°

0.01

101 °

Hartsburg, Sunday, 23 August

Light rain. High 101°, low 81°.

Pressure29.83 inHg

Wind14.1 mph S

Humidity33%

Visibility—

Dew point63°

Mon, 2485° / 69°

0.1

85 °

Hartsburg, Monday, 24 August

Light rain. High 85°, low 69°.

Pressure30.03 inHg

Wind17 mph NE

Humidity87%

Visibility—

Dew point71°

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

Tue, 2583° / 66°

0.1

83 °

Hartsburg, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high83°

Average low66°

Average precipitation0.1 in

Chance of precipitation32%

Record high94° (2014)

Record low55° (1966)

Wed, 2683° / 67°

0.11

83 °

Hartsburg, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high83°

Average low67°

Average precipitation0.11 in

Chance of precipitation33%

Record high94° (2003)

Record low52° (2025)

Thu, 2783° / 67°

0.09

83 °

Hartsburg, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high83°

Average low67°

Average precipitation0.09 in

Chance of precipitation30%

Record high94° (2013)

Record low53° (2025)

Fri, 2883° / 66°

0.11

83 °

Hartsburg, Friday, 28 August

Climate normal for this date — 60-year average.

Average high83°

Average low66°

Average precipitation0.11 in

Chance of precipitation28%

Record high96° (2013)

Record low50° (1986)

Sat, 2983° / 66°

0.09

83 °

Hartsburg, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high83°

Average low66°

Average precipitation0.09 in

Chance of precipitation27%

Record high95° (1984)

Record low46° (1986)

Sun, 3082° / 65°

0.07

82 °

Hartsburg, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.07 in

Chance of precipitation18%

Record high96° (2013)

Record low50° (1986)

Mon, 3182° / 65°

0.08

82 °

Hartsburg, Monday, 31 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.08 in

Chance of precipitation28%

Record high97° (2013)

Record low53° (1967)

Tue, 0182° / 65°

0.18

82 °

Hartsburg, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.18 in

Chance of precipitation25%

Record high99° (2011)

Record low49° (1967)

Wed, 0282° / 65°

0.09

82 °

Hartsburg, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.09 in

Chance of precipitation20%

Record high97° (2011)

Record low49° (2017)

Thu, 0382° / 64°

0.07

82 °

Hartsburg, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high82°

Average low64°

Average precipitation0.07 in

Chance of precipitation23%

Record high95° (2011)

Record low47° (1974)

Fri, 0480° / 63°

0.1

80 °

Hartsburg, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.1 in

Chance of precipitation27%

Record high94° (2007)

Record low47° (1974)

Sat, 0581° / 63°

0.04

81 °

Hartsburg, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high81°

Average low63°

Average precipitation0.04 in

Chance of precipitation20%

Record high94° (1990)

Record low50° (1974)

Sun, 0680° / 63°

0.06

80 °

Hartsburg, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.06 in

Chance of precipitation25%

Record high95° (1990)

Record low48° (1962)

Mon, 0781° / 63°

0.09

81 °

Hartsburg, Monday, 7 September

Climate normal for this date — 60-year average.

Average high81°

Average low63°

Average precipitation0.09 in

Chance of precipitation20%

Record high94° (2015)

Record low48° (2025)

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 Hartsburg, 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 Hartsburg, 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.