August weather forecast
Portland, CT

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Weather in August

August, the last month of the summer in Portland, is another warm month, with an average temperature ranging between min 63°F (17.2°C) and max 81°F (27.2°C).

Temperature

The advent of August signifies a minor shift to an average high-temperature of a still warm 81°F (27.2°C), aligning closely with July. Portland reports an average low-temperature of 63°F (17.2°C) during the nights of August.

Heat index

August's average heat index is computed to be a tropical 86°F (30°C). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.
Heat index details are generally centered around shaded locations and a mild breeze. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.

Humidity

In Portland, Connecticut, the average relative humidity in August is 76%.

Rainfall

In Portland, in August, it is raining for 16.5 days, with typically 2.76" (70mm) of accumulated precipitation. In Portland, during the entire year, the rain falls for 162.2 days and collects up to 34.13" (867mm) of precipitation.

Snowfall

June through October are months without snowfall in Portland, Connecticut.

Daylight

In Portland, the average length of the day in August is 13h and 48min.
On the first day of the month, sunrise is at 5:45 am and sunset at 8:07 pm. On the last day of August, in Portland, sunrise is at 6:16 am and sunset at 7:24 pm EDT.

Sunshine

July and August, with an average of 10.3h of sunshine, are months with the most sunshine in Portland.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 6 in August translates into this advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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Frequently asked questions

What is the average August temperature in Portland?

The average high-temperature and low-temperature during August are 81°F (27.2°C) and 63°F (17.2°C) respectively. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in August is computed to be 86°F (30°C).

What is the average humidity in August in Portland?

In Portland, Connecticut, the average relative humidity in August is 76%.

How many days does it rain in August in Portland?

In Portland, during August, the rain falls for 16.5 days and regularly aggregates up to 2.76" (70mm) of precipitation.

When it does not snow in Portland?

In Portland, snow does not fall in June through October.

How many hours of daylight does Portland have in August?

In Portland, the average day length in August is 13h and 48min.

When are sunrise and sunset in August in Portland?

On the first day of August in Portland, sunrise is at 5:45 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 6:16 am and sunset at 7:24 pm EDT.

What is the month with the most sunshine in Portland?

July and August, with an average of 10.3h of sunshine, are months with the most sunshine in Portland.

How long on average sun shines in August in Portland?

In August, the average sunshine duration in Portland is 10.3h.

When is the highest UV index in Portland?

The months with the highest UV index in Portland are June through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Portland?

In August, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Portland, CT

Average temperature in August - Portland, CT
  • Average high temperature in August: 81°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in August: 63°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

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Average pressure in August
Portland, CT

Average pressure in August - Portland, CT
  • Average pressure in August: 29.98"Hg

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

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Average wind speed in August
Portland, CT

Average wind speed in August - Portland, CT
  • Average wind speed in August: 5.4mph

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in August
Portland, CT

Average humidity in August - Portland, CT
  • Average humidity in August: 76%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in August
Portland, CT

Average rainfall in August - Portland, CT
  • Average rainfall in August: 2.76"

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in August
Portland, CT

Average rainfall days in August - Portland, CT
  • Average rainfall days in August: 16.5 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in August
Portland, CT

Average snowfall in August - Portland, CT
  • Average snowfall in August: 0"

The month with the highest snowfall is March (4.13").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Portland, CT

Average snowfall days in August - Portland, CT
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Portland, CT

Average daylight in August / Average sunshine in August - Portland, CT
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 10h and 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in August
Portland, CT

Average sunshine days in August - Portland, CT
  • Average sunshine days in August: 11.8 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.3 days).

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Average UV index in August
Portland, CT

Average UV index in August - Portland, CT
  • Average UV index in August: 6

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

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Average cloud cover in August
Portland, CT

Average cloud cover in August - Portland, CT
  • Average cloud cover in August: 33

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in August
Portland, CT

Average visibility in August - Portland, CT
  • Average visibility in August: 6mi

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

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Portland, Connecticut, USA

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