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As of 07:02 EDT

Weather in Londonderry, PA

70°Current weather

Londonderry, Sunday, 9 August, 07:02

Overcast. Feels like 71°. High 85°, low 70°.

Pressure30.09 inHg
Wind3 mph NW
Humidity94%
Visibility6.2 mi
Dew point68°
Mon, 1087° / 67°0.06Light rain
87 °Light rain

Londonderry, Monday, 10 August

Light rain. High 87°, low 67°.

Pressure30.00 inHg
Wind9 mph SW
Humidity58%
Visibility6.2 mi
Dew point65°
Tue, 1185° / 66°0.68Heavy rain
85 °Heavy rain

Londonderry, Tuesday, 11 August

Heavy rain. High 85°, low 66°.

Pressure29.97 inHg
Wind9.8 mph W
Humidity56%
Visibility6.2 mi
Dew point63°
Wed, 1283° / 65°0.09Light rain
83 °Light rain

Londonderry, Wednesday, 12 August

Light rain. High 83°, low 65°.

Pressure29.80 inHg
Wind7.7 mph W
Humidity66%
Visibility6.2 mi
Dew point66°
Thu, 1379° / 61°0Partly cloudy
79 °Partly cloudy

Londonderry, Thursday, 13 August

Partly cloudy. High 79°, low 61°.

Pressure29.88 inHg
Wind12.6 mph NW
Humidity40%
Visibility—
Dew point51°
Fri, 1474° / 53°0Overcast
74 °Overcast

Londonderry, Friday, 14 August

Overcast. High 74°, low 53°.

Pressure30.06 inHg
Wind9.1 mph NW
Humidity41%
Visibility—
Dew point47°
Sat, 1574° / 52°0Overcast
74 °Overcast

Londonderry, Saturday, 15 August

Overcast. High 74°, low 52°.

Pressure30.21 inHg
Wind9.6 mph NW
Humidity35%
Visibility—
Dew point42°
Sun, 1672° / 52°0Overcast
72 °Overcast

Londonderry, Sunday, 16 August

Overcast. High 72°, low 52°.

Pressure30.18 inHg
Wind3.4 mph NW
Humidity66%
Visibility—
Dew point53°
Mon, 1782° / 55°0Mostly clear
82 °Mostly clear

Londonderry, Monday, 17 August

Mostly clear. High 82°, low 55°.

Pressure29.97 inHg
Wind7.4 mph NW
Humidity41%
Visibility—
Dew point53°
Tue, 1885° / 59°0Clear
85 °Clear

Londonderry, Tuesday, 18 August

Clear. High 85°, low 59°.

Pressure30.00 inHg
Wind7.9 mph NW
Humidity36%
Visibility—
Dew point52°
Wed, 1986° / 60°0Partly cloudy
86 °Partly cloudy

Londonderry, Wednesday, 19 August

Partly cloudy. High 86°, low 60°.

Pressure30.06 inHg
Wind3.9 mph S
Humidity41%
Visibility—
Dew point56°
Thu, 2092° / 62°0Partly cloudy
92 °Partly cloudy

Londonderry, Thursday, 20 August

Partly cloudy. High 92°, low 62°.

Pressure29.97 inHg
Wind5 mph SE
Humidity39%
Visibility—
Dew point58°
Fri, 2197° / 70°0.03Light rain
97 °Light rain

Londonderry, Friday, 21 August

Light rain. High 97°, low 70°.

Pressure29.83 inHg
Wind9 mph NW
Humidity40%
Visibility—
Dew point66°
Sat, 2295° / 72°0.13Rain
95 °Rain

Londonderry, Saturday, 22 August

Rain. High 95°, low 72°.

Pressure29.91 inHg
Wind7.4 mph NW
Humidity27%
Visibility—
Dew point53°
Sun, 2398° / 69°0Mostly clear
98 °Mostly clear

Londonderry, Sunday, 23 August

Mostly clear. High 98°, low 69°.

Pressure29.91 inHg
Wind7.9 mph NW
Humidity29%
Visibility—
Dew point57°
Mon, 2496° / 75°0.08Light rain
96 °Light rain

Londonderry, Monday, 24 August

Light rain. High 96°, low 75°.

Pressure29.97 inHg
Wind12.7 mph NW
Humidity42%
Visibility—
Dew point67°

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 Londonderry, 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 Londonderry, 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.