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As of 13:20 EDT

Weather in Sumner, MD

90°Current weather

Sumner, Saturday, 8 August, 13:20

Partly cloudy. Feels like 99°. High 90°, low 67°.

Pressure30.06 inHg
Wind4 mph W
Humidity59%
Visibility6.2 mi
Dew point72°
Sun, 0989° / 71°0Partly cloudy
89 °Partly cloudy

Sumner, Sunday, 9 August

Partly cloudy. High 89°, low 71°.

Pressure30.03 inHg
Wind7.2 mph NW
Humidity47%
Visibility6.2 mi
Dew point66°
Mon, 1095° / 74°0.01Light rain
95 °Light rain

Sumner, Monday, 10 August

Light rain. High 95°, low 74°.

Pressure30.03 inHg
Wind5.6 mph NW
Humidity37%
Visibility6.2 mi
Dew point61°
Tue, 1194° / 71°0.17Rain
94 °Rain

Sumner, Tuesday, 11 August

Rain. High 94°, low 71°.

Pressure29.94 inHg
Wind8.7 mph W
Humidity46%
Visibility6.2 mi
Dew point66°
Wed, 1284° / 70°0.25Rain
84 °Rain

Sumner, Wednesday, 12 August

Rain. High 84°, low 70°.

Pressure29.80 inHg
Wind5 mph SW
Humidity80%
Visibility6.2 mi
Dew point67°
Thu, 1391° / 72°0.32Rain
91 °Rain

Sumner, Thursday, 13 August

Rain. High 91°, low 72°.

Pressure29.80 inHg
Wind6.7 mph W
Humidity45%
Visibility—
Dew point63°
Fri, 1482° / 68°0Mostly clear
82 °Mostly clear

Sumner, Friday, 14 August

Mostly clear. High 82°, low 68°.

Pressure30.00 inHg
Wind9.1 mph NW
Humidity35%
Visibility—
Dew point48°
Sat, 1583° / 63°0Clear
83 °Clear

Sumner, Saturday, 15 August

Clear. High 83°, low 63°.

Pressure30.12 inHg
Wind6.3 mph NW
Humidity37%
Visibility—
Dew point51°
Sun, 1685° / 66°0Overcast
85 °Overcast

Sumner, Sunday, 16 August

Overcast. High 85°, low 66°.

Pressure30.15 inHg
Wind5.4 mph NW
Humidity30%
Visibility—
Dew point48°
Mon, 1776° / 64°0.1Light rain
76 °Light rain

Sumner, Monday, 17 August

Light rain. High 76°, low 64°.

Pressure30.15 inHg
Wind9.4 mph NE
Humidity58%
Visibility—
Dew point56°
Tue, 1873° / 66°0.26Light rain
73 °Light rain

Sumner, Tuesday, 18 August

Light rain. High 73°, low 66°.

Pressure30.00 inHg
Wind8.3 mph E
Humidity97%
Visibility—
Dew point68°
Wed, 1987° / 67°0Mostly clear
87 °Mostly clear

Sumner, Wednesday, 19 August

Mostly clear. High 87°, low 67°.

Pressure29.85 inHg
Wind6.3 mph NW
Humidity47%
Visibility—
Dew point62°
Thu, 2074° / 61°0.26Rain
74 °Rain

Sumner, Thursday, 20 August

Rain. High 74°, low 61°.

Pressure29.91 inHg
Wind9.4 mph N
Humidity95%
Visibility—
Dew point69°
Fri, 2174° / 54°0Clear
74 °Clear

Sumner, Friday, 21 August

Clear. High 74°, low 54°.

Pressure30.06 inHg
Wind9.7 mph N
Humidity32%
Visibility—
Dew point39°
Sat, 2276° / 58°0Clear
76 °Clear

Sumner, Saturday, 22 August

Clear. High 76°, low 58°.

Pressure30.06 inHg
Wind6.7 mph NW
Humidity30%
Visibility—
Dew point40°
Sun, 2380° / 62°0Partly cloudy
80 °Partly cloudy

Sumner, Sunday, 23 August

Partly cloudy. High 80°, low 62°.

Pressure30.06 inHg
Wind6.6 mph S
Humidity28%
Visibility—
Dew point42°

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 Sumner, 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 Sumner, 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.