Camp Greylock, Sunday, 9 August, 01:44
Clear. Feels like 64°. High 83°, low 64°.
Camp Greylock, Monday, 10 August
Partly cloudy. High 77°, low 61°.
Camp Greylock, Tuesday, 11 August
Overcast. High 79°, low 64°.
Camp Greylock, Wednesday, 12 August
Rain. High 72°, low 59°.
Camp Greylock, Thursday, 13 August
Light rain. High 73°, low 54°.
Camp Greylock, Friday, 14 August
Clear. High 68°, low 48°.
Camp Greylock, Saturday, 15 August
Clear. High 71°, low 49°.
Camp Greylock, Sunday, 16 August
Clear. High 72°, low 49°.
Camp Greylock, Monday, 17 August
Light rain. High 76°, low 52°.
Camp Greylock, Tuesday, 18 August
Light rain. High 71°, low 59°.
Camp Greylock, Wednesday, 19 August
Light rain. High 71°, low 57°.
Camp Greylock, Thursday, 20 August
Rain. High 76°, low 55°.
Camp Greylock, Friday, 21 August
Overcast. High 69°, low 51°.
Camp Greylock, Saturday, 22 August
Clear. High 69°, low 45°.
Camp Greylock, Sunday, 23 August
Light rain. High 71°, low 51°.
Camp Greylock, Monday, 24 August
Light rain. High 75°, low 65°.
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 Camp Greylock, MA 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 Camp Greylock, MA 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.