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As of 18:39 EDT

Weather in Williston, MD

88°Current weather

Williston, Saturday, 8 August, 18:39

Partly cloudy. Feels like 101°. High 88°, low 73°.

Pressure29.94 inHg
Wind6.4 mph S
Humidity72%
Visibility6.2 mi
Dew point78°
Sun, 0992° / 73°0Overcast
92 °Overcast

Williston, Sunday, 9 August

Overcast. High 92°, low 73°.

Pressure30.00 inHg
Wind8.7 mph W
Humidity50%
Visibility6.2 mi
Dew point69°
Mon, 1093° / 76°0Overcast
93 °Overcast

Williston, Monday, 10 August

Overcast. High 93°, low 76°.

Pressure30.00 inHg
Wind6 mph W
Humidity52%
Visibility6.2 mi
Dew point71°
Tue, 1190° / 69°0.07Light rain
90 °Light rain

Williston, Tuesday, 11 August

Light rain. High 90°, low 69°.

Pressure29.94 inHg
Wind11.4 mph W
Humidity57%
Visibility6.2 mi
Dew point67°
Wed, 1287° / 71°0.03Light rain
87 °Light rain

Williston, Wednesday, 12 August

Light rain. High 87°, low 71°.

Pressure29.83 inHg
Wind9.9 mph W
Humidity57%
Visibility6.2 mi
Dew point67°
Thu, 1389° / 72°0.02Light rain
89 °Light rain

Williston, Thursday, 13 August

Light rain. High 89°, low 72°.

Pressure29.80 inHg
Wind12.2 mph NW
Humidity44%
Visibility—
Dew point63°
Fri, 1469° / 61°0.96Heavy rain
69 °Heavy rain

Williston, Friday, 14 August

Heavy rain. High 69°, low 61°.

Pressure30.00 inHg
Wind7.2 mph NE
Humidity76%
Visibility—
Dew point60°
Sat, 1576° / 57°0Clear
76 °Clear

Williston, Saturday, 15 August

Clear. High 76°, low 57°.

Pressure30.21 inHg
Wind10.3 mph NW
Humidity40%
Visibility—
Dew point48°
Sun, 1678° / 57°0Clear
78 °Clear

Williston, Sunday, 16 August

Clear. High 78°, low 57°.

Pressure30.27 inHg
Wind6.4 mph S
Humidity38%
Visibility—
Dew point49°
Mon, 1783° / 61°0Mostly clear
83 °Mostly clear

Williston, Monday, 17 August

Mostly clear. High 83°, low 61°.

Pressure30.15 inHg
Wind12 mph S
Humidity50%
Visibility—
Dew point61°
Tue, 1875° / 70°0.17Light rain
75 °Light rain

Williston, Tuesday, 18 August

Light rain. High 75°, low 70°.

Pressure30.00 inHg
Wind11.7 mph S
Humidity89%
Visibility—
Dew point67°
Wed, 1985° / 68°0.13Light rain
85 °Light rain

Williston, Wednesday, 19 August

Light rain. High 85°, low 68°.

Pressure29.85 inHg
Wind10.6 mph NW
Humidity50%
Visibility—
Dew point63°
Thu, 2082° / 64°0Overcast
82 °Overcast

Williston, Thursday, 20 August

Overcast. High 82°, low 64°.

Pressure29.97 inHg
Wind6.2 mph NE
Humidity46%
Visibility—
Dew point56°
Fri, 2177° / 67°0.3Light rain
77 °Light rain

Williston, Friday, 21 August

Light rain. High 77°, low 67°.

Pressure29.88 inHg
Wind13.4 mph S
Humidity84%
Visibility—
Dew point71°
Sat, 2286° / 67°0.03Light rain
86 °Light rain

Williston, Saturday, 22 August

Light rain. High 86°, low 67°.

Pressure29.77 inHg
Wind10.5 mph NW
Humidity50%
Visibility—
Dew point62°
Sun, 2373° / 59°0Partly cloudy
73 °Partly cloudy

Williston, Sunday, 23 August

Partly cloudy. High 73°, low 59°.

Pressure30.03 inHg
Wind15.5 mph N
Humidity34%
Visibility—
Dew point41°

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.