Weather in New Canaan, CT
New Canaan, Sunday, 9 August, 07:29
Partly cloudy. Feels like 75°. High 87°, low 71°.
Monthly outlook for New Canaan, CT: average high 82.5°, average low 64.9°. That is 1° above the climate normal for August. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 23 August (89.6°), the coolest 15 August (55.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.6° | 81.5° | -0.5° |
| 19 August – 28 August | 85.6° | 79.8° | +3.3° |
| 29 August – 7 September | at normal | 78.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Byram (14 mi).
0.04
New Canaan, Monday, 10 August
Light rain. High 86°, low 68°.
0.12New Canaan, Tuesday, 11 August
Light rain. High 86°, low 69°.
0New Canaan, Wednesday, 12 August
Light rain. High 78°, low 65°.
0.05New Canaan, Thursday, 13 August
Light rain. High 80°, low 64°.
0
New Canaan, Friday, 14 August
Clear. High 73°, low 58°.
0New Canaan, Saturday, 15 August
Clear. High 76°, low 55°.
0
New Canaan, Sunday, 16 August
Overcast. High 77°, low 57°.
0New Canaan, Monday, 17 August
Partly cloudy. High 80°, low 60°.
0.01New Canaan, Tuesday, 18 August
Light rain. High 80°, low 60°.
0.01New Canaan, Wednesday, 19 August
Light rain. High 80°, low 65°.
0
New Canaan, Thursday, 20 August
Mostly clear. High 83°, low 66°.
0.02New Canaan, Friday, 21 August
Light rain. High 88°, low 70°.
0.02New Canaan, Saturday, 22 August
Light rain. High 89°, low 72°.
0New Canaan, Sunday, 23 August
Clear. High 90°, low 68°.
0.16New Canaan, Monday, 24 August
Light rain. High 84°, low 71°.
0.08New Canaan, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06New Canaan, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.16
New Canaan, Thursday, 27 August
Climate normal for this date — 60-year average.
0.21New Canaan, Friday, 28 August
Climate normal for this date — 60-year average.
0.14New Canaan, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08New Canaan, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05New Canaan, Monday, 31 August
Climate normal for this date — 60-year average.
0.09New Canaan, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.18New Canaan, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11New Canaan, Thursday, 3 September
Climate normal for this date — 60-year average.
0.12New Canaan, Friday, 4 September
Climate normal for this date — 60-year average.
0.06New Canaan, Saturday, 5 September
Climate normal for this date — 60-year average.
0.2New Canaan, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1New Canaan, 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 New Canaan, 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 New Canaan, 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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