Weather in Blackrock Mill, MD
Blackrock Mill, Sunday, 9 August, 02:27
Overcast. Feels like 74°. High 89°, low 72°.
Monthly outlook for Blackrock Mill, MD: average high 84.7°, average low 65.9°. That is 0.8° above the climate normal for August. Precipitation is expected on 5 days (about 0.6 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 11 August (92.7°), the coolest 16 August (56.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 85.5° | 84.1° | +0.8° |
| 19 August – 28 August | 83.5° | 82.9° | +0.3° |
| 29 August – 7 September | at normal | 81.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Germantown (4 mi).
0.01
Blackrock Mill, Monday, 10 August
Light rain. High 91°, low 73°.
0.11Blackrock Mill, Tuesday, 11 August
Rain. High 93°, low 70°.
0.17Blackrock Mill, Wednesday, 12 August
Rain. High 92°, low 70°.
0.01Blackrock Mill, Thursday, 13 August
Light rain. High 86°, low 69°.
0Blackrock Mill, Friday, 14 August
Overcast. High 81°, low 61°.
0Blackrock Mill, Saturday, 15 August
Overcast. High 80°, low 58°.
0Blackrock Mill, Sunday, 16 August
Overcast. High 76°, low 56°.
0.04Blackrock Mill, Monday, 17 August
Light rain. High 83°, low 68°.
0.02Blackrock Mill, Tuesday, 18 August
Light rain. High 86°, low 65°.
0.01Blackrock Mill, Wednesday, 19 August
Light rain. High 84°, low 68°.
0.17Blackrock Mill, Thursday, 20 August
Light rain. High 81°, low 68°.
0
Blackrock Mill, Friday, 21 August
Clear. High 81°, low 60°.
0
Blackrock Mill, Saturday, 22 August
Mostly clear. High 82°, low 57°.
0.1Blackrock Mill, Sunday, 23 August
Light rain. High 81°, low 69°.
0Blackrock Mill, Monday, 24 August
Clear. High 92°, low 70°.
0.06
Blackrock Mill, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06Blackrock Mill, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.14
Blackrock Mill, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Blackrock Mill, Friday, 28 August
Climate normal for this date — 60-year average.
0.1Blackrock Mill, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06Blackrock Mill, Sunday, 30 August
Climate normal for this date — 60-year average.
0.09Blackrock Mill, Monday, 31 August
Climate normal for this date — 60-year average.
0.11Blackrock Mill, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.11Blackrock Mill, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Blackrock Mill, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Blackrock Mill, Friday, 4 September
Climate normal for this date — 60-year average.
0.14Blackrock Mill, Saturday, 5 September
Climate normal for this date — 60-year average.
0.26Blackrock Mill, Sunday, 6 September
Climate normal for this date — 60-year average.
0.09Blackrock Mill, Monday, 7 September
Climate normal for this date — 60-year average.
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 Blackrock Mill, MD 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 Blackrock Mill, MD 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.
Sun and moon today
Weather history
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