Weather in Northwest Harwinton, CT
Northwest Harwinton, Sunday, 9 August, 14:59
Clear. Feels like 91°. High 85°, low 68°.
Monthly outlook for Northwest Harwinton, CT: average high 79.2°, average low 60.6°. That is 0.5° above the climate normal for August. Precipitation is expected on 4 days (about 0.9 inches), against a normal of 6 days and 2.5 inches. The warmest day looks like 24 August (85.6°), the coolest 15 August (53.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78.1° | 79.3° | -0.6° |
| 19 August – 28 August | 81° | 77.3° | +2.1° |
| 29 August – 7 September | at normal | 75.8° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Plymouth (8 mi).
0.19
Northwest Harwinton, Monday, 10 August
Rain. High 82°, low 64°.
0
Northwest Harwinton, Tuesday, 11 August
Partly cloudy. High 82°, low 64°.
0.04Northwest Harwinton, Wednesday, 12 August
Light rain. High 74°, low 62°.
0Northwest Harwinton, Thursday, 13 August
Clear. High 80°, low 57°.
0
Northwest Harwinton, Friday, 14 August
Overcast. High 71°, low 54°.
0Northwest Harwinton, Saturday, 15 August
Overcast. High 77°, low 54°.
0.46Northwest Harwinton, Sunday, 16 August
Rain. High 73°, low 59°.
0Northwest Harwinton, Monday, 17 August
Partly cloudy. High 75°, low 59°.
0
Northwest Harwinton, Tuesday, 18 August
Mostly clear. High 81°, low 58°.
0.2Northwest Harwinton, Wednesday, 19 August
Light rain. High 81°, low 64°.
0Northwest Harwinton, Thursday, 20 August
Overcast. High 80°, low 56°.
0Northwest Harwinton, Friday, 21 August
Overcast. High 79°, low 66°.
0Northwest Harwinton, Saturday, 22 August
Overcast. High 79°, low 61°.
0Northwest Harwinton, Sunday, 23 August
Mostly clear. High 82°, low 60°.
0.03Northwest Harwinton, Monday, 24 August
Light rain. High 86°, low 61°.
0.12Northwest Harwinton, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09Northwest Harwinton, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.18
Northwest Harwinton, Thursday, 27 August
Climate normal for this date — 60-year average.
0.21Northwest Harwinton, Friday, 28 August
Climate normal for this date — 60-year average.
0.17Northwest Harwinton, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Northwest Harwinton, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Northwest Harwinton, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Northwest Harwinton, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.16Northwest Harwinton, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12Northwest Harwinton, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11Northwest Harwinton, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Northwest Harwinton, Saturday, 5 September
Climate normal for this date — 60-year average.
0.22Northwest Harwinton, Sunday, 6 September
Climate normal for this date — 60-year average.
0.13Northwest Harwinton, 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 Northwest Harwinton, CT 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 Northwest Harwinton, CT 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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