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As of 21:52 EDT

Weather in Thornhill, VA

77°Current weather

Thornhill, Saturday, 8 August, 21:52

Clear. Feels like 79°. High 90°, low 72°.

Pressure30.03 inHg
Wind3.8 mph SW
Humidity84%
Visibility6.2 mi
Dew point72°
Sun, 0991° / 71°0.03Light rain
91 °Light rain

Thornhill, Sunday, 9 August

Light rain. High 91°, low 71°.

Pressure30.03 inHg
Wind1.4 mph NW
Humidity38%
Visibility6.2 mi
Dew point66°
Mon, 1099° / 72°0.19Rain
99 °Rain

Thornhill, Monday, 10 August

Rain. High 99°, low 72°.

Pressure30.00 inHg
Wind4.3 mph W
Humidity34%
Visibility6.2 mi
Dew point63°
Tue, 1193° / 68°0.14Rain
93 °Rain

Thornhill, Tuesday, 11 August

Rain. High 93°, low 68°.

Pressure29.97 inHg
Wind5.1 mph W
Humidity43%
Visibility6.2 mi
Dew point64°
Wed, 1295° / 69°0.34Rain
95 °Rain

Thornhill, Wednesday, 12 August

Rain. High 95°, low 69°.

Pressure29.80 inHg
Wind9.5 mph W
Humidity53%
Visibility6.2 mi
Dew point63°
Thu, 1391° / 68°0.12Light rain
91 °Light rain

Thornhill, Thursday, 13 August

Light rain. High 91°, low 68°.

Pressure29.83 inHg
Wind9.8 mph N
Humidity35%
Visibility—
Dew point57°
Fri, 1465° / 58°0.13Light rain
65 °Light rain

Thornhill, Friday, 14 August

Light rain. High 65°, low 58°.

Pressure30.12 inHg
Wind4.6 mph NE
Humidity95%
Visibility—
Dew point59°
Sat, 1583° / 59°0Overcast
83 °Overcast

Thornhill, Saturday, 15 August

Overcast. High 83°, low 59°.

Pressure30.18 inHg
Wind8 mph N
Humidity31%
Visibility—
Dew point46°
Sun, 1687° / 59°0Partly cloudy
87 °Partly cloudy

Thornhill, Sunday, 16 August

Partly cloudy. High 87°, low 59°.

Pressure30.15 inHg
Wind6.1 mph SE
Humidity32%
Visibility—
Dew point50°
Mon, 1772° / 66°0.02Light rain
72 °Light rain

Thornhill, Monday, 17 August

Light rain. High 72°, low 66°.

Pressure30.09 inHg
Wind8.6 mph S
Humidity74%
Visibility—
Dew point63°
Tue, 1871° / 66°0.09Light rain
71 °Light rain

Thornhill, Tuesday, 18 August

Light rain. High 71°, low 66°.

Pressure30.03 inHg
Wind3.8 mph S
Humidity93%
Visibility—
Dew point66°
Wed, 1987° / 67°0Overcast
87 °Overcast

Thornhill, Wednesday, 19 August

Overcast. High 87°, low 67°.

Pressure29.88 inHg
Wind9.7 mph S
Humidity53%
Visibility—
Dew point64°
Thu, 2088° / 64°0.02Light rain
88 °Light rain

Thornhill, Thursday, 20 August

Light rain. High 88°, low 64°.

Pressure29.74 inHg
Wind12.8 mph NW
Humidity25%
Visibility—
Dew point46°
Fri, 2184° / 61°0Clear
84 °Clear

Thornhill, Friday, 21 August

Clear. High 84°, low 61°.

Pressure29.94 inHg
Wind8.8 mph N
Humidity24%
Visibility—
Dew point40°
Sat, 2286° / 58°0Clear
86 °Clear

Thornhill, Saturday, 22 August

Clear. High 86°, low 58°.

Pressure30.03 inHg
Wind5 mph SW
Humidity31%
Visibility—
Dew point49°
Sun, 2386° / 67°0.17Light rain
86 °Light rain

Thornhill, Sunday, 23 August

Light rain. High 86°, low 67°.

Pressure30.00 inHg
Wind9.9 mph SW
Humidity87%
Visibility—
Dew point70°

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 Thornhill, VA 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 Thornhill, VA 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.