Weather in Great Swamp, MA
Great Swamp, Sunday, 9 August, 04:29
Clear. Feels like 67°. High 86°, low 67°.
Monthly outlook for Great Swamp, MA: average high 82.2°, average low 59.7°. That is 1.1° above the climate normal for August. Precipitation is expected on 5 days (about 0.6 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 21 August (90.3°), the coolest 16 August (51.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 79.8° | 81° | -0.7° |
| 19 August – 28 August | 86.2° | 79.1° | +3.9° |
| 29 August – 7 September | at normal | 77.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Springfield (10 mi).
0.07
Great Swamp, Monday, 10 August
Rain. High 84°, low 64°.
0.05Great Swamp, Tuesday, 11 August
Light rain. High 84°, low 64°.
0
Great Swamp, Wednesday, 12 August
Overcast. High 77°, low 60°.
0.01Great Swamp, Thursday, 13 August
Light rain. High 78°, low 58°.
0
Great Swamp, Friday, 14 August
Clear. High 72°, low 55°.
0Great Swamp, Saturday, 15 August
Clear. High 75°, low 53°.
0Great Swamp, Sunday, 16 August
Overcast. High 79°, low 52°.
0.07Great Swamp, Monday, 17 August
Light rain. High 81°, low 56°.
0Great Swamp, Tuesday, 18 August
Overcast. High 81°, low 54°.
0Great Swamp, Wednesday, 19 August
Overcast. High 81°, low 56°.
0Great Swamp, Thursday, 20 August
Overcast. High 88°, low 60°.
0.23Great Swamp, Friday, 21 August
Rain. High 90°, low 66°.
0.01Great Swamp, Saturday, 22 August
Light rain. High 90°, low 67°.
0Great Swamp, Sunday, 23 August
Clear. High 89°, low 62°.
0.13Great Swamp, Monday, 24 August
Light rain. High 79°, low 63°.
0.08
Great Swamp, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.07
Great Swamp, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12Great Swamp, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Great Swamp, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Great Swamp, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08Great Swamp, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Great Swamp, Monday, 31 August
Climate normal for this date — 60-year average.
0.08Great Swamp, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.14Great Swamp, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.1Great Swamp, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Great Swamp, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Great Swamp, Saturday, 5 September
Climate normal for this date — 60-year average.
0.17Great Swamp, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11
Great Swamp, 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 Great Swamp, 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 Great Swamp, 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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