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As of 22:38 CDT

Weather in Watertown, IL

64°Current weather

Watertown, Saturday, 8 August, 22:38

Partly cloudy. Feels like 61°. High 83°, low 64°.

Pressure30.00 inHg
Wind3.5 mph S
Humidity1%
Visibility6.2 mi
Dew point-32°
Sun, 0987° / 63°0.17Rain
87 °Rain

Watertown, Sunday, 9 August

Rain. High 87°, low 63°.

Pressure29.88 inHg
Wind11.9 mph SE
Humidity86%
Visibility6.2 mi
Dew point74°
Mon, 1087° / 70°0.24Rain
87 °Rain

Watertown, Monday, 10 August

Rain. High 87°, low 70°.

Pressure29.88 inHg
Wind6.1 mph S
Humidity76%
Visibility6.2 mi
Dew point75°
Tue, 1185° / 71°0.08Light rain
85 °Light rain

Watertown, Tuesday, 11 August

Light rain. High 85°, low 71°.

Pressure29.74 inHg
Wind8.6 mph S
Humidity88%
Visibility6.2 mi
Dew point74°
Wed, 1279° / 67°0.03Light rain
79 °Light rain

Watertown, Wednesday, 12 August

Light rain. High 79°, low 67°.

Pressure29.88 inHg
Wind6.8 mph NW
Humidity84%
Visibility6.2 mi
Dew point71°
Thu, 1373° / 60°0Overcast
73 °Overcast

Watertown, Thursday, 13 August

Overcast. High 73°, low 60°.

Pressure30.03 inHg
Wind7.8 mph E
Humidity74%
Visibility—
Dew point62°
Fri, 1477° / 57°0Partly cloudy
77 °Partly cloudy

Watertown, Friday, 14 August

Partly cloudy. High 77°, low 57°.

Pressure30.12 inHg
Wind5.5 mph E
Humidity59%
Visibility—
Dew point58°
Sat, 1567° / 60°0.05Light rain
67 °Light rain

Watertown, Saturday, 15 August

Light rain. High 67°, low 60°.

Pressure30.30 inHg
Wind9.2 mph S
Humidity67%
Visibility—
Dew point55°
Sun, 1672° / 58°0Overcast
72 °Overcast

Watertown, Sunday, 16 August

Overcast. High 72°, low 58°.

Pressure30.15 inHg
Wind7 mph SE
Humidity77%
Visibility—
Dew point58°
Mon, 1777° / 64°0.01Light rain
77 °Light rain

Watertown, Monday, 17 August

Light rain. High 77°, low 64°.

Pressure30.06 inHg
Wind5.4 mph S
Humidity74%
Visibility—
Dew point65°
Tue, 1882° / 64°0Overcast
82 °Overcast

Watertown, Tuesday, 18 August

Overcast. High 82°, low 64°.

Pressure29.97 inHg
Wind12.5 mph SW
Humidity69%
Visibility—
Dew point67°
Wed, 1973° / 59°0.06Light rain
73 °Light rain

Watertown, Wednesday, 19 August

Light rain. High 73°, low 59°.

Pressure29.97 inHg
Wind15.7 mph NW
Humidity87%
Visibility—
Dew point59°
Thu, 2063° / 52°0.01Light rain
63 °Light rain

Watertown, Thursday, 20 August

Light rain. High 63°, low 52°.

Pressure30.09 inHg
Wind8.4 mph N
Humidity70%
Visibility—
Dew point52°
Fri, 2174° / 53°0.01Light rain
74 °Light rain

Watertown, Friday, 21 August

Light rain. High 74°, low 53°.

Pressure30.06 inHg
Wind7.1 mph E
Humidity62%
Visibility—
Dew point56°
Sat, 2272° / 54°0.02Light rain
72 °Light rain

Watertown, Saturday, 22 August

Light rain. High 72°, low 54°.

Pressure29.88 inHg
Wind10 mph SE
Humidity79%
Visibility—
Dew point57°
Sun, 2379° / 63°0Clear
79 °Clear

Watertown, Sunday, 23 August

Clear. High 79°, low 63°.

Pressure29.91 inHg
Wind13.1 mph W
Humidity49%
Visibility—
Dew point56°

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 Watertown, 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 Watertown, 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.