Weather in South Lancaster, MA
South Lancaster, Sunday, 9 August, 09:41
Clear. Feels like 79°. High 89°, low 69°.
Monthly outlook for South Lancaster, MA: average high 81.4°, average low 60.9°. That is 1.3° above the climate normal for August. Precipitation is expected on 5 days (about 1.2 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 10 August (89.3°), the coolest 15 August (54.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 81.2° | 80° | +0.7° |
| 19 August – 28 August | 81.6° | 78° | +2° |
| 29 August – 7 September | at normal | 76.3° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Worcester (13 mi).
0
South Lancaster, Monday, 10 August
Mostly clear. High 89°, low 68°.
0.01
South Lancaster, Tuesday, 11 August
Light rain. High 87°, low 65°.
0
South Lancaster, Wednesday, 12 August
Partly cloudy. High 86°, low 62°.
0.21South Lancaster, Thursday, 13 August
Rain. High 82°, low 63°.
0South Lancaster, Friday, 14 August
Clear. High 76°, low 56°.
0South Lancaster, Saturday, 15 August
Clear. High 77°, low 54°.
0South Lancaster, Sunday, 16 August
Partly cloudy. High 81°, low 56°.
0.28South Lancaster, Monday, 17 August
Rain. High 65°, low 60°.
0.16South Lancaster, Tuesday, 18 August
Light rain. High 80°, low 60°.
0
South Lancaster, Wednesday, 19 August
Overcast. High 79°, low 59°.
0.09South Lancaster, Thursday, 20 August
Light rain. High 83°, low 64°.
0South Lancaster, Friday, 21 August
Overcast. High 81°, low 59°.
0South Lancaster, Saturday, 22 August
Clear. High 86°, low 61°.
0.43South Lancaster, Sunday, 23 August
Rain. High 84°, low 65°.
0South Lancaster, Monday, 24 August
Clear. High 76°, low 55°.
0.09South Lancaster, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.07South Lancaster, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.1
South Lancaster, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15South Lancaster, Friday, 28 August
Climate normal for this date — 60-year average.
0.17South Lancaster, Saturday, 29 August
Climate normal for this date — 60-year average.
0.1South Lancaster, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07South Lancaster, Monday, 31 August
Climate normal for this date — 60-year average.
0.07South Lancaster, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.14South Lancaster, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12South Lancaster, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11South Lancaster, Friday, 4 September
Climate normal for this date — 60-year average.
0.07South Lancaster, Saturday, 5 September
Climate normal for this date — 60-year average.
0.15South Lancaster, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1South Lancaster, 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 South Lancaster, MA 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 South Lancaster, MA 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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