As of 10:35 EDT

Weather in Williston, MD

61°

Williston, Monday, 12 October, 10:35

Clear. Feels like 61°. High 74°, low 58°.

Pressure29.85 inHg

Wind6.9 mph N

Humidity100%

Visibility6.2 mi

Dew point61°

See detailed hourly forecast

Tue, 1379° / 58°

79 °

Williston, Tuesday, 13 October

Clear. High 79°, low 58°.

Pressure30.00 inHg

Wind6.5 mph SW

Humidity68%

Visibility6.2 mi

Dew point64°

Wed, 1482° / 66°

0.05

82 °

Williston, Wednesday, 14 October

Light rain. High 82°, low 66°.

Pressure29.97 inHg

Wind9.6 mph W

Humidity63%

Visibility6.2 mi

Dew point65°

Thu, 1569° / 59°

0.22

69 °

Williston, Thursday, 15 October

Rain. High 69°, low 59°.

Pressure30.21 inHg

Wind5.9 mph NE

Humidity61%

Visibility6.2 mi

Dew point52°

Fri, 1681° / 59°

0.44

81 °

Williston, Friday, 16 October

Rain. High 81°, low 59°.

Pressure29.71 inHg

Wind22.7 mph NW

Humidity77%

Visibility—

Dew point67°

Sat, 1756° / 48°

56 °

Williston, Saturday, 17 October

Clear. High 56°, low 48°.

Pressure30.30 inHg

Wind19 mph NW

Humidity46%

Visibility—

Dew point32°

Sun, 1855° / 39°

55 °

Williston, Sunday, 18 October

Clear. High 55°, low 39°.

Pressure30.62 inHg

Wind6.7 mph S

Humidity37%

Visibility—

Dew point24°

Mon, 1967° / 43°

67 °

Williston, Monday, 19 October

Clear. High 67°, low 43°.

Pressure30.56 inHg

Wind11.6 mph SW

Humidity64%

Visibility—

Dew point46°

Tue, 2070° / 53°

70 °

Williston, Tuesday, 20 October

Overcast. High 70°, low 53°.

Pressure30.33 inHg

Wind7 mph SW

Humidity71%

Visibility—

Dew point55°

Wed, 2170° / 58°

70 °

Williston, Wednesday, 21 October

Overcast. High 70°, low 58°.

Pressure30.36 inHg

Wind8.9 mph NE

Humidity55%

Visibility—

Dew point48°

Thu, 2262° / 49°

62 °

Williston, Thursday, 22 October

Clear. High 62°, low 49°.

Pressure30.56 inHg

Wind10.8 mph E

Humidity65%

Visibility—

Dew point48°

Fri, 2366° / 47°

66 °

Williston, Friday, 23 October

Partly cloudy. High 66°, low 47°.

Pressure30.47 inHg

Wind10.1 mph SW

Humidity58%

Visibility—

Dew point44°

Sat, 2473° / 58°

73 °

Williston, Saturday, 24 October

Overcast. High 73°, low 58°.

Pressure30.24 inHg

Wind8 mph NW

Humidity69%

Visibility—

Dew point55°

Sun, 2576° / 64°

76 °

Williston, Sunday, 25 October

Overcast. High 76°, low 64°.

Pressure30.06 inHg

Wind12.5 mph S

Humidity65%

Visibility—

Dew point58°

Mon, 2668° / 52°

68 °

Williston, Monday, 26 October

Overcast. High 68°, low 52°.

Pressure29.74 inHg

Wind20.2 mph NW

Humidity55%

Visibility—

Dew point47°

Tue, 2764° / 47°

64 °

Williston, Tuesday, 27 October

Mostly clear. High 64°, low 47°.

Pressure29.71 inHg

Wind15.4 mph W

Humidity48%

Visibility—

Dew point35°

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.