Weather in South Billerica, MA
South Billerica, Sunday, 9 August, 12:39
Clear. Feels like 94°. High 89°, low 69°.
Monthly outlook for South Billerica, MA: average high 81.6°, average low 61.9°. That is 1.2° above the climate normal for August. Precipitation is expected on 5 days (about 1.5 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 10 August (90.8°), the coolest 16 August (56.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 82.1° | 80.3° | +1° |
| 19 August – 28 August | 80.9° | 78.5° | +1.4° |
| 29 August – 7 September | at normal | 76.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Arlington (10 mi).
0
South Billerica, Monday, 10 August
Partly cloudy. High 91°, low 69°.
0
South Billerica, Tuesday, 11 August
Overcast. High 88°, low 66°.
0South Billerica, Wednesday, 12 August
Partly cloudy. High 86°, low 62°.
0.16
South Billerica, Thursday, 13 August
Light rain. High 84°, low 63°.
0South Billerica, Friday, 14 August
Clear. High 77°, low 57°.
0South Billerica, Saturday, 15 August
Clear. High 78°, low 57°.
0South Billerica, Sunday, 16 August
Overcast. High 82°, low 56°.
0.19South Billerica, Monday, 17 August
Light rain. High 67°, low 61°.
0.37South Billerica, Tuesday, 18 August
Rain. High 79°, low 60°.
0South Billerica, Wednesday, 19 August
Overcast. High 78°, low 61°.
0.15South Billerica, Thursday, 20 August
Light rain. High 79°, low 64°.
0South Billerica, Friday, 21 August
Overcast. High 81°, low 61°.
0South Billerica, Saturday, 22 August
Clear. High 87°, low 61°.
0.66South Billerica, Sunday, 23 August
Rain. High 84°, low 66°.
0South Billerica, Monday, 24 August
Clear. High 76°, low 57°.
0.1South Billerica, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06
South Billerica, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.09
South Billerica, Thursday, 27 August
Climate normal for this date — 60-year average.
0.12South Billerica, Friday, 28 August
Climate normal for this date — 60-year average.
0.16South Billerica, Saturday, 29 August
Climate normal for this date — 60-year average.
0.13South Billerica, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07South Billerica, Monday, 31 August
Climate normal for this date — 60-year average.
0.05South Billerica, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.15South Billerica, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12South Billerica, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11South Billerica, Friday, 4 September
Climate normal for this date — 60-year average.
0.07South Billerica, Saturday, 5 September
Climate normal for this date — 60-year average.
0.15South Billerica, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11South Billerica, 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 Billerica, 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 Billerica, 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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