EN
English Español

As of 23:14 EDT

Weather in Mount Gretna, PA

73°Current weather

Mount Gretna, Saturday, 8 August, 23:14

Overcast. Feels like 74°. High 84°, low 70°.

Pressure30.00 inHg
Wind4 mph SW
Humidity91%
Visibility6.2 mi
Dew point70°
Sun, 0986° / 70°0.01Light rain
86 °Light rain

Mount Gretna, Sunday, 9 August

Light rain. High 86°, low 70°.

Pressure30.03 inHg
Wind7.9 mph NW
Humidity57%
Visibility6.2 mi
Dew point67°
Mon, 1086° / 71°0.09Rain
86 °Rain

Mount Gretna, Monday, 10 August

Rain. High 86°, low 71°.

Pressure30.00 inHg
Wind5.1 mph NW
Humidity58%
Visibility6.2 mi
Dew point66°
Tue, 1186° / 68°0.2Rain
86 °Rain

Mount Gretna, Tuesday, 11 August

Rain. High 86°, low 68°.

Pressure29.94 inHg
Wind7.9 mph W
Humidity62%
Visibility6.2 mi
Dew point67°
Wed, 1284° / 68°0.04Light rain
84 °Light rain

Mount Gretna, Wednesday, 12 August

Light rain. High 84°, low 68°.

Pressure29.74 inHg
Wind11.2 mph W
Humidity73%
Visibility6.2 mi
Dew point69°
Thu, 1379° / 63°0Clear
79 °Clear

Mount Gretna, Thursday, 13 August

Clear. High 79°, low 63°.

Pressure29.83 inHg
Wind14.4 mph NW
Humidity40%
Visibility—
Dew point52°
Fri, 1478° / 55°0Clear
78 °Clear

Mount Gretna, Friday, 14 August

Clear. High 78°, low 55°.

Pressure30.03 inHg
Wind9.8 mph NW
Humidity39%
Visibility—
Dew point47°
Sat, 1578° / 56°0Clear
78 °Clear

Mount Gretna, Saturday, 15 August

Clear. High 78°, low 56°.

Pressure30.15 inHg
Wind14.1 mph NW
Humidity40%
Visibility—
Dew point48°
Sun, 1677° / 55°0Overcast
77 °Overcast

Mount Gretna, Sunday, 16 August

Overcast. High 77°, low 55°.

Pressure30.18 inHg
Wind5.7 mph SE
Humidity43%
Visibility—
Dew point51°
Mon, 1771° / 60°0.22Rain
71 °Rain

Mount Gretna, Monday, 17 August

Rain. High 71°, low 60°.

Pressure30.09 inHg
Wind8.7 mph S
Humidity78%
Visibility—
Dew point62°
Tue, 1867° / 64°0.13Light rain
67 °Light rain

Mount Gretna, Tuesday, 18 August

Light rain. High 67°, low 64°.

Pressure30.06 inHg
Wind7.4 mph SE
Humidity94%
Visibility—
Dew point65°
Wed, 1977° / 64°0.19Rain
77 °Rain

Mount Gretna, Wednesday, 19 August

Rain. High 77°, low 64°.

Pressure29.91 inHg
Wind12 mph SE
Humidity90%
Visibility—
Dew point66°
Thu, 2074° / 64°0.63Rain
74 °Rain

Mount Gretna, Thursday, 20 August

Rain. High 74°, low 64°.

Pressure29.71 inHg
Wind17.4 mph NW
Humidity56%
Visibility—
Dew point57°
Fri, 2177° / 55°0Clear
77 °Clear

Mount Gretna, Friday, 21 August

Clear. High 77°, low 55°.

Pressure29.88 inHg
Wind15.4 mph NW
Humidity39%
Visibility—
Dew point47°
Sat, 2276° / 51°0Partly cloudy
76 °Partly cloudy

Mount Gretna, Saturday, 22 August

Partly cloudy. High 76°, low 51°.

Pressure30.06 inHg
Wind6.4 mph SE
Humidity37%
Visibility—
Dew point44°
Sun, 2383° / 59°0.02Light rain
83 °Light rain

Mount Gretna, Sunday, 23 August

Light rain. High 83°, low 59°.

Pressure29.94 inHg
Wind13.9 mph S
Humidity57%
Visibility—
Dew point63°

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 Mount 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 Mount 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.