Weather in Northwest Harwinton, CT
Northwest Harwinton, Sunday, 9 August, 12:07
Clear. Feels like 89°. High 83°, low 68°.
Monthly outlook for Northwest Harwinton, CT: average high 78.5°, average low 58.8°. That is 0.1° 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 23 August (84.2°), the coolest 15 August (51.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 77.2° | 79.3° | -1.1° |
| 19 August – 28 August | 80.8° | 77.3° | +1.9° |
| 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
Northwest Harwinton, Monday, 10 August
Light rain. High 84°, low 64°.
0Northwest Harwinton, Tuesday, 11 August
Light rain. High 83°, low 64°.
0
Northwest Harwinton, Wednesday, 12 August
Overcast. High 83°, low 60°.
0.05Northwest Harwinton, Thursday, 13 August
Light rain. High 80°, low 62°.
0Northwest Harwinton, Friday, 14 August
Clear. High 73°, low 53°.
0Northwest Harwinton, Saturday, 15 August
Clear. High 73°, low 52°.
0
Northwest Harwinton, Sunday, 16 August
Partly cloudy. High 73°, low 52°.
0.27Northwest Harwinton, Monday, 17 August
Light rain. High 62°, low 60°.
0Northwest Harwinton, Tuesday, 18 August
Clear. High 79°, low 57°.
0Northwest Harwinton, Wednesday, 19 August
Overcast. High 79°, low 61°.
0.06Northwest Harwinton, Thursday, 20 August
Light rain. High 84°, low 61°.
0Northwest Harwinton, Friday, 21 August
Clear. High 81°, low 54°.
0Northwest Harwinton, Saturday, 22 August
Clear. High 83°, low 58°.
0.46Northwest Harwinton, Sunday, 23 August
Rain. High 84°, low 61°.
0Northwest Harwinton, Monday, 24 August
Clear. High 73°, low 53°.
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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