West Derry, Sunday, 1 November, 05:32
Partly cloudy. Feels like 42°. High 67°, low 42°.
West Derry, Monday, 2 November
Partly cloudy. High 69°, low 45°.
West Derry, Tuesday, 3 November
Overcast. High 69°, low 45°.
West Derry, Wednesday, 4 November
Overcast. High 74°, low 46°.
West Derry, Thursday, 5 November
Rain. High 64°, low 52°.
West Derry, Friday, 6 November
Light rain. High 56°, low 51°.
West Derry, Saturday, 7 November
Light rain. High 50°, low 46°.
West Derry, Sunday, 8 November
Light rain. High 50°, low 45°.
West Derry, Monday, 9 November
Light rain. High 49°, low 41°.
West Derry, Tuesday, 10 November
Clear. High 55°, low 37°.
West Derry, Wednesday, 11 November
Mostly clear. High 50°, low 35°.
West Derry, Thursday, 12 November
Rain. High 44°, low 38°.
West Derry, Friday, 13 November
Snow. High 48°, low 37°.
West Derry, Saturday, 14 November
Light snow. High 37°, low 35°.
West Derry, Sunday, 15 November
Partly cloudy. High 42°, low 33°.
West Derry, Monday, 16 November
Overcast. High 53°, low 34°.
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.