As of 09:11 EDT

Weather in Sumter, SC

55°

Sumter, Thursday, 8 October, 09:11

Overcast. Feels like 55°. High 84°, low 55°.

Pressure30.00 inHg

Wind0 mph N

Humidity100%

Visibility6.2 mi

Dew point56°

See detailed hourly forecast

Fri, 0980° / 61°

80 °

Sumter, Friday, 9 October

Overcast. High 80°, low 61°.

Pressure30.18 inHg

Wind7.4 mph NE

Humidity43%

Visibility6.2 mi

Dew point51°

Sat, 1072° / 63°

1.52

72 °

Sumter, Saturday, 10 October

Heavy rain. High 72°, low 63°.

Pressure30.21 inHg

Wind11.3 mph NE

Humidity97%

Visibility1.5 mi

Dew point69°

Sun, 1182° / 71°

0.33

82 °

Sumter, Sunday, 11 October

Rain. High 82°, low 71°.

Pressure30.03 inHg

Wind11.3 mph SW

Humidity96%

Visibility2.1 mi

Dew point76°

Mon, 1282° / 65°

82 °

Sumter, Monday, 12 October

Overcast. High 82°, low 65°.

Pressure29.91 inHg

Wind8.5 mph NW

Humidity51%

Visibility—

Dew point59°

Tue, 1382° / 61°

82 °

Sumter, Tuesday, 13 October

Clear. High 82°, low 61°.

Pressure29.91 inHg

Wind5.9 mph W

Humidity52%

Visibility—

Dew point60°

Wed, 1476° / 60°

76 °

Sumter, Wednesday, 14 October

Clear. High 76°, low 60°.

Pressure30.03 inHg

Wind12.8 mph NE

Humidity46%

Visibility—

Dew point53°

Thu, 1574° / 55°

74 °

Sumter, Thursday, 15 October

Clear. High 74°, low 55°.

Pressure30.27 inHg

Wind6.8 mph E

Humidity46%

Visibility—

Dew point50°

Fri, 1679° / 58°

79 °

Sumter, Friday, 16 October

Clear. High 79°, low 58°.

Pressure30.24 inHg

Wind5.8 mph SE

Humidity52%

Visibility—

Dew point57°

Sat, 1783° / 63°

83 °

Sumter, Saturday, 17 October

Clear. High 83°, low 63°.

Pressure30.15 inHg

Wind6.2 mph NE

Humidity43%

Visibility—

Dew point55°

Sun, 1876° / 64°

76 °

Sumter, Sunday, 18 October

Clear. High 76°, low 64°.

Pressure30.24 inHg

Wind13.3 mph NE

Humidity49%

Visibility—

Dew point54°

Mon, 1981° / 60°

81 °

Sumter, Monday, 19 October

Overcast. High 81°, low 60°.

Pressure30.18 inHg

Wind10.1 mph NE

Humidity53%

Visibility—

Dew point59°

Tue, 2082° / 67°

0.17

82 °

Sumter, Tuesday, 20 October

Light rain. High 82°, low 67°.

Pressure30.06 inHg

Wind7.2 mph E

Humidity65%

Visibility—

Dew point67°

Wed, 2171° / 66°

0.68

71 °

Sumter, Wednesday, 21 October

Rain. High 71°, low 66°.

Pressure29.88 inHg

Wind9.3 mph NE

Humidity96%

Visibility—

Dew point67°

Thu, 2273° / 63°

73 °

Sumter, Thursday, 22 October

Overcast. High 73°, low 63°.

Pressure29.88 inHg

Wind13.1 mph NE

Humidity73%

Visibility—

Dew point62°

Fri, 2372° / 65°

72 °

Sumter, Friday, 23 October

Overcast. High 72°, low 65°.

Pressure30.06 inHg

Wind13.3 mph NE

Humidity70%

Visibility—

Dew point61°

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.