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As of 01:12 CDT

Weather in Harrisburg, IL

71°Current weather

Harrisburg, Sunday, 9 August, 01:12

Clear. Feels like 72°. High 93°, low 71°.

Pressure30.06 inHg
Wind5.8 mph SW
Humidity94%
Visibility6.2 mi
Dew point69°
Mon, 1097° / 75°0Overcast
97 °Overcast

Harrisburg, Monday, 10 August

Overcast. High 97°, low 75°.

Pressure30.03 inHg
Wind12.5 mph SW
Humidity53%
Visibility6.2 mi
Dew point69°
Tue, 11100° / 78°0Clear
100 °Clear

Harrisburg, Tuesday, 11 August

Clear. High 100°, low 78°.

Pressure29.91 inHg
Wind14.7 mph SW
Humidity38%
Visibility6.2 mi
Dew point67°
Wed, 1288° / 74°0.24Rain
88 °Rain

Harrisburg, Wednesday, 12 August

Rain. High 88°, low 74°.

Pressure29.85 inHg
Wind0.7 mph E
Humidity70%
Visibility6.2 mi
Dew point69°
Thu, 1379° / 72°0.64Rain
79 °Rain

Harrisburg, Thursday, 13 August

Rain. High 79°, low 72°.

Pressure29.94 inHg
Wind8.5 mph NE
Humidity95%
Visibility—
Dew point72°
Fri, 1481° / 70°0.74Heavy rain
81 °Heavy rain

Harrisburg, Friday, 14 August

Heavy rain. High 81°, low 70°.

Pressure30.00 inHg
Wind10.9 mph NE
Humidity78%
Visibility—
Dew point71°
Sat, 1579° / 67°0.15Light rain
79 °Light rain

Harrisburg, Saturday, 15 August

Light rain. High 79°, low 67°.

Pressure30.21 inHg
Wind12.7 mph E
Humidity77%
Visibility—
Dew point67°
Sun, 1692° / 67°0.09Light rain
92 °Light rain

Harrisburg, Sunday, 16 August

Light rain. High 92°, low 67°.

Pressure30.03 inHg
Wind8.9 mph NW
Humidity56%
Visibility—
Dew point69°
Mon, 1789° / 71°0.11Light rain
89 °Light rain

Harrisburg, Monday, 17 August

Light rain. High 89°, low 71°.

Pressure30.00 inHg
Wind7.8 mph NE
Humidity74%
Visibility—
Dew point72°
Tue, 1890° / 71°0.2Light rain
90 °Light rain

Harrisburg, Tuesday, 18 August

Light rain. High 90°, low 71°.

Pressure29.97 inHg
Wind12.8 mph NW
Humidity59%
Visibility—
Dew point71°
Wed, 1990° / 71°0Overcast
90 °Overcast

Harrisburg, Wednesday, 19 August

Overcast. High 90°, low 71°.

Pressure29.91 inHg
Wind9.4 mph N
Humidity50%
Visibility—
Dew point66°
Thu, 2079° / 63°0Clear
79 °Clear

Harrisburg, Thursday, 20 August

Clear. High 79°, low 63°.

Pressure30.00 inHg
Wind10.9 mph NE
Humidity50%
Visibility—
Dew point56°
Fri, 2179° / 61°0.07Light rain
79 °Light rain

Harrisburg, Friday, 21 August

Light rain. High 79°, low 61°.

Pressure30.03 inHg
Wind8 mph NE
Humidity55%
Visibility—
Dew point54°
Sat, 2297° / 64°0.17Light rain
97 °Light rain

Harrisburg, Saturday, 22 August

Light rain. High 97°, low 64°.

Pressure29.83 inHg
Wind13.2 mph S
Humidity52%
Visibility—
Dew point65°
Sun, 2395° / 72°0.03Light rain
95 °Light rain

Harrisburg, Sunday, 23 August

Light rain. High 95°, low 72°.

Pressure29.94 inHg
Wind14.7 mph SW
Humidity42%
Visibility—
Dew point65°
Mon, 2490° / 73°0.1Light rain
90 °Light rain

Harrisburg, Monday, 24 August

Light rain. High 90°, low 73°.

Pressure30.03 inHg
Wind10 mph SW
Humidity51%
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 Harrisburg, 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 Harrisburg, 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.