As of 03:32 EDT

Weather in Williston, MD

66°

Williston, Sunday, 11 October, 03:32

Overcast. Feels like 66°. High 70°, low 61°.

Pressure30.27 inHg

Wind9.2 mph E

Humidity72%

Visibility1.5 mi

Dew point57°

See detailed hourly forecast

Mon, 1273° / 58°

0.21

73 °

Williston, Monday, 12 October

Rain. High 73°, low 58°.

Pressure29.80 inHg

Wind14.6 mph N

Humidity78%

Visibility6.2 mi

Dew point59°

Tue, 1376° / 59°

76 °

Williston, Tuesday, 13 October

Mostly clear. High 76°, low 59°.

Pressure30.00 inHg

Wind4.7 mph SW

Humidity68%

Visibility6.2 mi

Dew point63°

Wed, 1482° / 66°

0.06

82 °

Williston, Wednesday, 14 October

Light rain. High 82°, low 66°.

Pressure29.94 inHg

Wind8.1 mph W

Humidity66%

Visibility6.2 mi

Dew point67°

Thu, 1569° / 53°

0.04

69 °

Williston, Thursday, 15 October

Light rain. High 69°, low 53°.

Pressure30.21 inHg

Wind12.6 mph N

Humidity59%

Visibility—

Dew point49°

Fri, 1671° / 48°

71 °

Williston, Friday, 16 October

Overcast. High 71°, low 48°.

Pressure30.00 inHg

Wind15.3 mph SW

Humidity84%

Visibility—

Dew point52°

Sat, 1770° / 45°

0.02

70 °

Williston, Saturday, 17 October

Light rain. High 70°, low 45°.

Pressure29.88 inHg

Wind14.6 mph SW

Humidity73%

Visibility—

Dew point48°

Sun, 1849° / 38°

49 °

Williston, Sunday, 18 October

Clear. High 49°, low 38°.

Pressure30.39 inHg

Wind19.6 mph N

Humidity38%

Visibility—

Dew point20°

Mon, 1952° / 32°

52 °

Williston, Monday, 19 October

Clear. High 52°, low 32°.

Pressure30.65 inHg

Wind10.3 mph N

Humidity33%

Visibility—

Dew point17°

Tue, 2059° / 37°

59 °

Williston, Tuesday, 20 October

Clear. High 59°, low 37°.

Pressure30.53 inHg

Wind4.2 mph N

Humidity35%

Visibility—

Dew point24°

Wed, 2163° / 41°

63 °

Williston, Wednesday, 21 October

Clear. High 63°, low 41°.

Pressure30.42 inHg

Wind6.1 mph S

Humidity35%

Visibility—

Dew point28°

Thu, 2268° / 45°

68 °

Williston, Thursday, 22 October

Mostly clear. High 68°, low 45°.

Pressure30.24 inHg

Wind11.4 mph SW

Humidity50%

Visibility—

Dew point40°

Fri, 2367° / 49°

67 °

Williston, Friday, 23 October

Clear. High 67°, low 49°.

Pressure30.06 inHg

Wind13.7 mph NW

Humidity52%

Visibility—

Dew point44°

Sat, 2455° / 42°

55 °

Williston, Saturday, 24 October

Overcast. High 55°, low 42°.

Pressure30.21 inHg

Wind17.7 mph NW

Humidity51%

Visibility—

Dew point33°

Sun, 2556° / 37°

56 °

Williston, Sunday, 25 October

Clear. High 56°, low 37°.

Pressure30.42 inHg

Wind8.2 mph W

Humidity52%

Visibility—

Dew point32°

Mon, 2662° / 43°

62 °

Williston, Monday, 26 October

Clear. High 62°, low 43°.

Pressure30.50 inHg

Wind5.2 mph S

Humidity47%

Visibility—

Dew point36°

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 Williston, MD 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 Williston, MD 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.