Monthly weather forecast and climate
Norwalk, CT

The tourist attraction spot of a stone house home to the Sheffield Island lighthouse in Norwalk, Connecticut, overlooking the water out front
The tourist attraction spot of a stone house home to the Sheffield Island lighthouse in Norwalk, Connecticut, overlooking the water out front

What is the coldest month in Norwalk?

With an average high-temperature of 37°F (2.8°C) and an average low-temperature of 23°F (-5°C), January is the coldest month.

How much does it rain in Norwalk?

Throughout the year, in Norwalk, 48.4" (1228.9mm) of rain is accumulated.

What is the driest month in Norwalk?

February is the month with the least rainfall, with 3" (77mm) of accumulated precipitation.

When is the ocean coldest in Norwalk?

February is the month with the coldest seawater in Norwalk, with an average ocean temperature of 39°F (3.9°C). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

What is the warmest month in Norwalk?

July is the warmest month, with an average high-temperature of 84°F (28.9°C) and an average low-temperature of 66°F (18.9°C).

What is the month with the warmest ocean in Norwalk?

The month with the warmest seawater is August, with an average ocean temperature of 73°F (22.8°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 73°F (22.8°C) water. (FYI: The Olympic swimming competition requires a water temperature between 77°F (25°C) and 82.4°F (28°C).)

What is the wettest month in Norwalk?

September is the month with the most rainfall in Norwalk, with 4.5" (115.3mm) of accumulated precipitation.
Average rainfall - Norwalk, CT
Average sea temperature - Norwalk, CT

The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (39°F).

Average daylight - Norwalk, CT

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

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