August weather forecast
Glastonbury, CT

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Weather in August

In August, as compared to July, Glastonbury experiences a minor drop in temperature and daylight hours. The city still resonates with summer fervor, aided by the persistent warmth. The humidity begins to decline gradually, making way for more tolerable heat levels. Despite it being summer, frequent showers persist. Overall, temperatures remain relatively high, making it a perfect month for outdoor gatherings.

Temperature

July's transformation into August witnesses an average high-temperature of a still warm 81°F (27.2°C) in Glastonbury, noting a minor change from the preceding month. An average nighttime temperature of 62.2°F (16.8°C) is noted in Glastonbury, Connecticut, during the month of August.

Heat index

The average heat index in August is evaluated at a tropical 86°F (30°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.
When referencing the heat index, its values are suitable for shady environments and light breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant 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 Glastonbury, the average relative humidity in August is 75%.

Rainfall

In August, in Glastonbury, the rain falls for 17 days. Throughout August, 2.72" (69mm) of precipitation is accumulated. Throughout the year, there are 164.5 rainfall days, and 32.09" (815mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall.

Daylight

In Glastonbury, 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, sunrise is at 6:15 am and sunset at 7:24 pm EDT.

Sunshine

The months with the most sunshine are July and August, with an average of 10.4h of sunshine.

UV index

In Glastonbury, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 5 in August transforms into the following instructions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What is the usual temperature for Glastonbury in August?

The high-temperature, in August, in Glastonbury, is 81°F (27.2°C), while the low-temperature averages to 62.2°F (16.8°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, in August is evaluated at 86°F (30°C).

What is the average humidity in August in Glastonbury?

In Glastonbury, Connecticut, the average relative humidity in August is 75%.

How many days does it rain in August in Glastonbury?

In Glastonbury, Connecticut, during August, the rain falls for 17 days and regularly aggregates up to 2.72" (69mm) of precipitation.

When it does not snow in Glastonbury?

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

What is the average length of the day in August in Glastonbury?

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

What time are sunrise and sunset in August in Glastonbury?

In August, on the first day of the month, sunrise is at 5:45 am and sunset at 8:07 pm. On the last day of the month, in Glastonbury, sunrise is at 6:15 am and sunset at 7:24 pm EDT.

What are the months with the most sunshine in Glastonbury?

The months with the most sunshine in Glastonbury, Connecticut, are July and August, with an average of 10.4h of sunshine.

How long on average sun shines in August in Glastonbury?

The average sunshine duration in August is 10.4h.

How high is the UV index in August in Glastonbury?

In August, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Glastonbury, CT

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

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in August: 62.2°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

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Average pressure in August
Glastonbury, CT

Average pressure in August - Glastonbury, 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
Glastonbury, CT

Average wind speed in August - Glastonbury, CT
  • Average wind speed in August: 5.3mph

The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

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Average humidity in August
Glastonbury, CT

Average humidity in August - Glastonbury, CT
  • Average humidity in August: 75%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).

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Average rainfall in August
Glastonbury, CT

Average rainfall in August - Glastonbury, CT
  • Average rainfall in August: 2.72"

The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is September (1.93").

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Average rainfall days in August
Glastonbury, CT

Average rainfall days in August - Glastonbury, CT
  • Average rainfall days in August: 17 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (9.2 days).

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Average snowfall in August
Glastonbury, CT

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

The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Glastonbury, CT

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

The month with the highest number of snowfall days is February (8.1 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
Glastonbury, CT

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

The month with the longest days is June (Average daylight: 15h and 12min).
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 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in August
Glastonbury, CT

Average sunshine days in August - Glastonbury, CT
  • Average sunshine days in August: 11.4 days

The month with the most sunshine days is January (17.6 days).
The month with the least sunshine days is June (10.7 days).

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Average UV index in August
Glastonbury, CT

Average UV index in August - Glastonbury, CT
  • Average UV index in August: 5

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in August
Glastonbury, CT

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

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in August
Glastonbury, CT

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

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

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Glastonbury, Connecticut, USA

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