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As of 17:19 EDT

Weather in Derry, PA

86°Current weather

Derry, Saturday, 8 August, 17:19

Partly cloudy. Feels like 94°. High 86°, low 70°.

Pressure29.94 inHg
Wind11.3 mph W
Humidity68%
Visibility6.2 mi
Dew point73°
Sun, 0987° / 69°0Clear
87 °Clear

Derry, Sunday, 9 August

Clear. High 87°, low 69°.

Pressure30.00 inHg
Wind6.7 mph NW
Humidity49%
Visibility6.2 mi
Dew point63°
Mon, 1086° / 68°0.17Rain
86 °Rain

Derry, Monday, 10 August

Rain. High 86°, low 68°.

Pressure30.00 inHg
Wind3.8 mph NW
Humidity73%
Visibility6.2 mi
Dew point68°
Tue, 1188° / 66°0.57Heavy rain
88 °Heavy rain

Derry, Tuesday, 11 August

Heavy rain. High 88°, low 66°.

Pressure29.91 inHg
Wind5.5 mph W
Humidity64%
Visibility6.2 mi
Dew point67°
Wed, 1283° / 66°0.22Rain
83 °Rain

Derry, Wednesday, 12 August

Rain. High 83°, low 66°.

Pressure29.80 inHg
Wind6.8 mph NW
Humidity64%
Visibility6.2 mi
Dew point65°
Thu, 1377° / 60°0.07Light rain
77 °Light rain

Derry, Thursday, 13 August

Light rain. High 77°, low 60°.

Pressure29.83 inHg
Wind10 mph NW
Humidity81%
Visibility—
Dew point67°
Fri, 1474° / 54°0Clear
74 °Clear

Derry, Friday, 14 August

Clear. High 74°, low 54°.

Pressure29.97 inHg
Wind10.5 mph N
Humidity37%
Visibility—
Dew point44°
Sat, 1574° / 49°0Mostly clear
74 °Mostly clear

Derry, Saturday, 15 August

Mostly clear. High 74°, low 49°.

Pressure30.18 inHg
Wind12.5 mph N
Humidity38%
Visibility—
Dew point44°
Sun, 1677° / 49°0Clear
77 °Clear

Derry, Sunday, 16 August

Clear. High 77°, low 49°.

Pressure30.30 inHg
Wind4 mph SW
Humidity36%
Visibility—
Dew point46°
Mon, 1783° / 54°0Overcast
83 °Overcast

Derry, Monday, 17 August

Overcast. High 83°, low 54°.

Pressure30.12 inHg
Wind8.5 mph S
Humidity48%
Visibility—
Dew point56°
Tue, 1881° / 65°0Overcast
81 °Overcast

Derry, Tuesday, 18 August

Overcast. High 81°, low 65°.

Pressure29.91 inHg
Wind6.6 mph W
Humidity53%
Visibility—
Dew point61°
Wed, 1978° / 59°0Overcast
78 °Overcast

Derry, Wednesday, 19 August

Overcast. High 78°, low 59°.

Pressure29.94 inHg
Wind9 mph N
Humidity55%
Visibility—
Dew point57°
Thu, 2075° / 54°0Overcast
75 °Overcast

Derry, Thursday, 20 August

Overcast. High 75°, low 54°.

Pressure29.97 inHg
Wind6.1 mph SW
Humidity54%
Visibility—
Dew point54°
Fri, 2167° / 58°0.2Rain
67 °Rain

Derry, Friday, 21 August

Rain. High 67°, low 58°.

Pressure29.88 inHg
Wind3.8 mph NE
Humidity96%
Visibility—
Dew point64°
Sat, 2283° / 63°0Mostly clear
83 °Mostly clear

Derry, Saturday, 22 August

Mostly clear. High 83°, low 63°.

Pressure29.77 inHg
Wind8.1 mph N
Humidity41%
Visibility—
Dew point54°
Sun, 2371° / 50°0Clear
71 °Clear

Derry, Sunday, 23 August

Clear. High 71°, low 50°.

Pressure30.03 inHg
Wind12.3 mph N
Humidity37%
Visibility—
Dew point40°

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 Derry, 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 Derry, 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.