September weather forecast and climate
Oakville, CT

Weather in September

September, the first month of the autumn, in Oakville, is also an agreeable month, with average temperature ranging between min 55.6°F (13.1°C) and max 73.2°F (22.9°C).

Temperature

In September, the average high-temperature slightly decreases, from a warm 80.6°F (27°C) in August, to an agreeable 73.2°F (22.9°C). In Oakville, the average low-temperature is 55.6°F (13.1°C).

Humidity

The average relative humidity is 78%.

Rainfall

The month with the least rainfall in Oakville is September when the rain falls for 13 days and typically collects 2.13" (54mm) of precipitation.

Snowfall

In Oakville snow does not fall in June through September.

Daylight

In Oakville, the average length of the day is 12.5h.

Sunshine

In Oakville, Connecticut, the average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Oakville?

In September, in Oakville, the average high-temperature is 73.2°F (22.9°C), and the average low-temperature is 55.6°F (13.1°C).

What is the average humidity in September in Oakville?

In September, the average relative humidity in Oakville is 78%.

How many days does it rain in September in Oakville?

In September, in Oakville, the rain falls for 13 days. Throughout September, 2.13" (54mm) of precipitation is accumulated.

What is the driest month in Oakville?

The month with the least rainfall in Oakville is September when the rain falls for 13 days and typically collects 2.13" (54mm) of precipitation.

Does it snow in Oakville in September?

In Oakville, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Oakville?

In Oakville, Connecticut, snow does not fall in June through September.

What is the average length of the day in September in Oakville?

In September, the average length of the day in Oakville is 12.5h.

How long on average sun shines in September in Oakville?

In Oakville, the average sunshine in September is 8.4h.

How high is the UV index in September in Oakville?

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Oakville, CT

Average temperature in September - Oakville, CT
  • Average high temperature in September: 73.2°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in September: 55.6°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).

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Average pressure in September
Oakville, CT

Average pressure in September - Oakville, CT
  • Average pressure in September: 30.06"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Oakville, CT

Average wind speed in September - Oakville, CT
  • Average wind speed in September: 5.8mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in September
Oakville, CT

Average humidity in September - Oakville, CT
  • Average humidity in September: 78%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Oakville, CT

Average rainfall in September - Oakville, CT
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is September (2.13").

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Average rainfall days in September
Oakville, CT

Average rainfall days in September - Oakville, CT
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in September
Oakville, CT

Average snowfall in September - Oakville, CT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.39").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Oakville, CT

Average snowfall days in September - Oakville, CT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (9.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Oakville, CT

Average daylight in September / Average sunshine in September - Oakville, CT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.4h

Months with the most sunshine are July and August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in September
Oakville, CT

Average sunshine days in September - Oakville, CT
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is January (18.1 days).
The month with the least sunshine days is June (11.1 days).

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Average UV index in September
Oakville, CT

Average UV index in September - Oakville, CT
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Oakville, CT

Average cloud cover in September - Oakville, CT
  • Average cloud cover in September: 39

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in September
Oakville, CT

Average visibility in September - Oakville, CT
  • Average visibility in September: 5mi

Months with the highest visibility are January, March, April, October, November and December (6mi).
Months with the lowest visibility are February, May, June, July, August and September (5mi).

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