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As of 15:22 CDT

Weather in Preston, IL

90°Current weather

Preston, Saturday, 8 August, 15:22

Clear. Feels like 101°. High 90°, low 70°.

Pressure30.03 inHg
Wind3.3 mph SE
Humidity64%
Visibility6.2 mi
Dew point75°
Sun, 0995° / 72°0Partly cloudy
95 °Partly cloudy

Preston, Sunday, 9 August

Partly cloudy. High 95°, low 72°.

Pressure29.97 inHg
Wind11.1 mph S
Humidity49%
Visibility6.2 mi
Dew point69°
Mon, 10101° / 74°0Clear
101 °Clear

Preston, Monday, 10 August

Clear. High 101°, low 74°.

Pressure29.97 inHg
Wind12.2 mph SW
Humidity41%
Visibility6.2 mi
Dew point69°
Tue, 11104° / 74°0.02Light rain
104 °Light rain

Preston, Tuesday, 11 August

Light rain. High 104°, low 74°.

Pressure29.88 inHg
Wind12 mph SW
Humidity36%
Visibility6.2 mi
Dew point66°
Wed, 1290° / 73°0.04Light rain
90 °Light rain

Preston, Wednesday, 12 August

Light rain. High 90°, low 73°.

Pressure29.85 inHg
Wind20.1 mph W
Humidity44%
Visibility6.2 mi
Dew point65°
Thu, 1377° / 72°0.24Light rain
77 °Light rain

Preston, Thursday, 13 August

Light rain. High 77°, low 72°.

Pressure29.85 inHg
Wind9.2 mph SE
Humidity87%
Visibility—
Dew point72°
Fri, 1480° / 64°0.04Light rain
80 °Light rain

Preston, Friday, 14 August

Light rain. High 80°, low 64°.

Pressure30.12 inHg
Wind11.8 mph NE
Humidity49%
Visibility—
Dew point58°
Sat, 1582° / 57°0Overcast
82 °Overcast

Preston, Saturday, 15 August

Overcast. High 82°, low 57°.

Pressure30.27 inHg
Wind10 mph E
Humidity41%
Visibility—
Dew point51°
Sun, 1683° / 62°0.04Light rain
83 °Light rain

Preston, Sunday, 16 August

Light rain. High 83°, low 62°.

Pressure30.18 inHg
Wind10.6 mph S
Humidity71%
Visibility—
Dew point61°
Mon, 17101° / 72°0.28Rain
101 °Rain

Preston, Monday, 17 August

Rain. High 101°, low 72°.

Pressure29.94 inHg
Wind18.9 mph S
Humidity48%
Visibility—
Dew point68°
Tue, 1891° / 74°0Overcast
91 °Overcast

Preston, Tuesday, 18 August

Overcast. High 91°, low 74°.

Pressure29.97 inHg
Wind11.4 mph N
Humidity53%
Visibility—
Dew point69°
Wed, 1993° / 73°0Mostly clear
93 °Mostly clear

Preston, Wednesday, 19 August

Mostly clear. High 93°, low 73°.

Pressure29.88 inHg
Wind8.6 mph SE
Humidity49%
Visibility—
Dew point69°
Thu, 2091° / 75°0.11Light rain
91 °Light rain

Preston, Thursday, 20 August

Light rain. High 91°, low 75°.

Pressure29.85 inHg
Wind12.7 mph NW
Humidity51%
Visibility—
Dew point68°
Fri, 2184° / 71°0.05Light rain
84 °Light rain

Preston, Friday, 21 August

Light rain. High 84°, low 71°.

Pressure29.91 inHg
Wind11.4 mph NE
Humidity72%
Visibility—
Dew point70°
Sat, 2288° / 66°0Overcast
88 °Overcast

Preston, Saturday, 22 August

Overcast. High 88°, low 66°.

Pressure29.91 inHg
Wind8 mph N
Humidity42%
Visibility—
Dew point58°
Sun, 2376° / 63°0Overcast
76 °Overcast

Preston, Sunday, 23 August

Overcast. High 76°, low 63°.

Pressure30.09 inHg
Wind11.6 mph NE
Humidity59%
Visibility—
Dew point57°

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 Preston, 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 Preston, 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.