West Derry, Monday, 26 October, 23:16
Clear. Feels like 48°. High 69°, low 37°.
West Derry, Tuesday, 27 October
Partly cloudy. High 68°, low 41°.
West Derry, Wednesday, 28 October
Overcast. High 69°, low 43°.
West Derry, Thursday, 29 October
Clear. High 68°, low 45°.
West Derry, Friday, 30 October
Partly cloudy. High 65°, low 46°.
West Derry, Saturday, 31 October
Overcast. High 68°, low 40°.
West Derry, Sunday, 1 November
Rain. High 64°, low 52°.
West Derry, Monday, 2 November
Rain. High 56°, low 54°.
West Derry, Tuesday, 3 November
Overcast. High 57°, low 52°.
West Derry, Wednesday, 4 November
Light rain. High 52°, low 44°.
West Derry, Thursday, 5 November
Rain. High 58°, low 46°.
West Derry, Friday, 6 November
Light snow. High 41°, low 32°.
West Derry, Saturday, 7 November
Light snow. High 36°, low 32°.
West Derry, Sunday, 8 November
Light snow. High 37°, low 27°.
West Derry, Monday, 9 November
Overcast. High 46°, low 27°.
West Derry, Tuesday, 10 November
Light rain. High 48°, low 42°.
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 West 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.
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.
They are real temperature extremes recorded in West Derry, PA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.