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As of 22:43 EDT

Weather in Gretna, PA

72°Current weather

Gretna, Saturday, 8 August, 22:43

Clear. Feels like 74°. High 83°, low 67°.

Pressure30.03 inHg
Wind6 mph W
Humidity91%
Visibility6.2 mi
Dew point70°
Sun, 0984° / 67°0.01Light rain
84 °Light rain

Gretna, Sunday, 9 August

Light rain. High 84°, low 67°.

Pressure30.09 inHg
Wind4.9 mph W
Humidity56%
Visibility6.2 mi
Dew point62°
Mon, 1086° / 65°1.76Heavy rain
86 °Heavy rain

Gretna, Monday, 10 August

Heavy rain. High 86°, low 65°.

Pressure30.03 inHg
Wind15.3 mph SW
Humidity85%
Visibility6.2 mi
Dew point70°
Tue, 1180° / 64°0.12Rain
80 °Rain

Gretna, Tuesday, 11 August

Rain. High 80°, low 64°.

Pressure29.97 inHg
Wind8.2 mph SW
Humidity72%
Visibility6.2 mi
Dew point67°
Wed, 1277° / 65°0.13Light rain
77 °Light rain

Gretna, Wednesday, 12 August

Light rain. High 77°, low 65°.

Pressure29.83 inHg
Wind10.2 mph W
Humidity88%
Visibility6.2 mi
Dew point70°
Thu, 1372° / 58°0.03Light rain
72 °Light rain

Gretna, Thursday, 13 August

Light rain. High 72°, low 58°.

Pressure29.97 inHg
Wind12 mph NW
Humidity54%
Visibility—
Dew point53°
Fri, 1475° / 53°0Clear
75 °Clear

Gretna, Friday, 14 August

Clear. High 75°, low 53°.

Pressure30.09 inHg
Wind6.9 mph NW
Humidity50%
Visibility—
Dew point51°
Sat, 1575° / 52°0Overcast
75 °Overcast

Gretna, Saturday, 15 August

Overcast. High 75°, low 52°.

Pressure30.24 inHg
Wind7.1 mph N
Humidity50%
Visibility—
Dew point52°
Sun, 1677° / 53°0Partly cloudy
77 °Partly cloudy

Gretna, Sunday, 16 August

Partly cloudy. High 77°, low 53°.

Pressure30.15 inHg
Wind4.6 mph E
Humidity48%
Visibility—
Dew point53°
Mon, 1773° / 58°0.02Light rain
73 °Light rain

Gretna, Monday, 17 August

Light rain. High 73°, low 58°.

Pressure30.03 inHg
Wind7.1 mph N
Humidity67%
Visibility—
Dew point60°
Tue, 1880° / 58°0Clear
80 °Clear

Gretna, Tuesday, 18 August

Clear. High 80°, low 58°.

Pressure30.00 inHg
Wind3.9 mph NE
Humidity57%
Visibility—
Dew point60°
Wed, 1982° / 62°0.49Rain
82 °Rain

Gretna, Wednesday, 19 August

Rain. High 82°, low 62°.

Pressure29.85 inHg
Wind10.9 mph W
Humidity54%
Visibility—
Dew point62°
Thu, 2068° / 56°0.06Light rain
68 °Light rain

Gretna, Thursday, 20 August

Light rain. High 68°, low 56°.

Pressure29.85 inHg
Wind13.3 mph NW
Humidity70%
Visibility—
Dew point56°
Fri, 2173° / 52°0Clear
73 °Clear

Gretna, Friday, 21 August

Clear. High 73°, low 52°.

Pressure30.00 inHg
Wind8.5 mph NW
Humidity47%
Visibility—
Dew point49°
Sat, 2277° / 50°0.01Light rain
77 °Light rain

Gretna, Saturday, 22 August

Light rain. High 77°, low 50°.

Pressure30.03 inHg
Wind7 mph SE
Humidity46%
Visibility—
Dew point50°
Sun, 2384° / 62°0.07Light rain
84 °Light rain

Gretna, Sunday, 23 August

Light rain. High 84°, low 62°.

Pressure29.91 inHg
Wind12.1 mph SW
Humidity76%
Visibility—
Dew point68°

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 Gretna, PA 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 Gretna, PA 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.