Heart Lake, Sunday, 9 August, 00:26
Mostly clear. Feels like 66°. High 82°, low 65°.
Heart Lake, Monday, 10 August
Light rain. High 82°, low 63°.
Heart Lake, Tuesday, 11 August
Heavy rain. High 83°, low 62°.
Heart Lake, Wednesday, 12 August
Light rain. High 78°, low 61°.
Heart Lake, Thursday, 13 August
Light rain. High 71°, low 51°.
Heart Lake, Friday, 14 August
Clear. High 70°, low 45°.
Heart Lake, Saturday, 15 August
Clear. High 71°, low 48°.
Heart Lake, Sunday, 16 August
Partly cloudy. High 74°, low 48°.
Heart Lake, Monday, 17 August
Overcast. High 71°, low 51°.
Heart Lake, Tuesday, 18 August
Light rain. High 67°, low 58°.
Heart Lake, Wednesday, 19 August
Heavy rain. High 74°, low 60°.
Heart Lake, Thursday, 20 August
Rain. High 67°, low 57°.
Heart Lake, Friday, 21 August
Mostly clear. High 68°, low 49°.
Heart Lake, Saturday, 22 August
Clear. High 71°, low 43°.
Heart Lake, Sunday, 23 August
Light rain. High 78°, low 53°.
Heart Lake, Monday, 24 August
Light rain. High 76°, low 61°.
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 Heart Lake, 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 Heart Lake, 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.