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As of 16:01 EDT

Weather in Sumter, SC

91°Current weather

Sumter, Saturday, 8 August, 16:01

Overcast. Feels like 103°. High 91°, low 73°.

Pressure30.09 inHg
Wind2 mph S
Humidity67%
Visibility6.2 mi
Dew point76°
Sun, 0992° / 70°0.04Light rain
92 °Light rain

Sumter, Sunday, 9 August

Light rain. High 92°, low 70°.

Pressure30.12 inHg
Wind5.9 mph S
Humidity53%
Visibility6.2 mi
Dew point71°
Mon, 1097° / 72°0.01Light rain
97 °Light rain

Sumter, Monday, 10 August

Light rain. High 97°, low 72°.

Pressure30.09 inHg
Wind6.8 mph W
Humidity49%
Visibility6.2 mi
Dew point71°
Tue, 11100° / 75°0.06Light rain
100 °Light rain

Sumter, Tuesday, 11 August

Light rain. High 100°, low 75°.

Pressure30.03 inHg
Wind7.9 mph W
Humidity44%
Visibility6.2 mi
Dew point69°
Wed, 12101° / 74°0.02Light rain
101 °Light rain

Sumter, Wednesday, 12 August

Light rain. High 101°, low 74°.

Pressure29.91 inHg
Wind13 mph W
Humidity43%
Visibility6.2 mi
Dew point69°
Thu, 1399° / 75°0.06Light rain
99 °Light rain

Sumter, Thursday, 13 August

Light rain. High 99°, low 75°.

Pressure29.88 inHg
Wind14 mph W
Humidity35%
Visibility—
Dew point64°
Fri, 1494° / 75°0.23Light rain
94 °Light rain

Sumter, Friday, 14 August

Light rain. High 94°, low 75°.

Pressure29.94 inHg
Wind15.1 mph W
Humidity45%
Visibility—
Dew point67°
Sat, 1585° / 71°0Overcast
85 °Overcast

Sumter, Saturday, 15 August

Overcast. High 85°, low 71°.

Pressure30.18 inHg
Wind9.7 mph NE
Humidity64%
Visibility—
Dew point66°
Sun, 1688° / 69°0Partly cloudy
88 °Partly cloudy

Sumter, Sunday, 16 August

Partly cloudy. High 88°, low 69°.

Pressure30.24 inHg
Wind8.5 mph E
Humidity41%
Visibility—
Dew point59°
Mon, 1788° / 68°0Partly cloudy
88 °Partly cloudy

Sumter, Monday, 17 August

Partly cloudy. High 88°, low 68°.

Pressure30.18 inHg
Wind10.1 mph SE
Humidity42%
Visibility—
Dew point60°
Tue, 1890° / 69°0Partly cloudy
90 °Partly cloudy

Sumter, Tuesday, 18 August

Partly cloudy. High 90°, low 69°.

Pressure30.06 inHg
Wind11.2 mph S
Humidity42%
Visibility—
Dew point61°
Wed, 1991° / 72°0.74Rain
91 °Rain

Sumter, Wednesday, 19 August

Rain. High 91°, low 72°.

Pressure29.88 inHg
Wind9.1 mph S
Humidity67%
Visibility—
Dew point72°
Thu, 2096° / 75°0Overcast
96 °Overcast

Sumter, Thursday, 20 August

Overcast. High 96°, low 75°.

Pressure29.91 inHg
Wind12.1 mph SE
Humidity44%
Visibility—
Dew point67°
Fri, 2197° / 76°0.03Light rain
97 °Light rain

Sumter, Friday, 21 August

Light rain. High 97°, low 76°.

Pressure29.83 inHg
Wind13.4 mph W
Humidity50%
Visibility—
Dew point67°
Sat, 2296° / 75°0.1Light rain
96 °Light rain

Sumter, Saturday, 22 August

Light rain. High 96°, low 75°.

Pressure29.80 inHg
Wind10 mph W
Humidity41%
Visibility—
Dew point66°
Sun, 2393° / 74°0.06Light rain
93 °Light rain

Sumter, Sunday, 23 August

Light rain. High 93°, low 74°.

Pressure29.91 inHg
Wind13.5 mph E
Humidity37%
Visibility—
Dew point60°

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 Sumter, SC 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 Sumter, SC 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.