Hartford
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Hartford, CT

Skyscape view of the city of Hartford, Connecticut, with the roads leading to the town, and trees on roadsides
Skyscape view of the city of Hartford, Connecticut, with the roads leading to the town, and trees on roadsides
August, the last month of the summer, in Hartford, is also a moderately hot month, with temperature in the range of an average high of 82.8°F (28.2°C) and an average low of 61.2°F (16.2°C).

Temperature

In Hartford, the average high-temperature is essentially the same as in July - a still warm 82.8°F (28.2°C). The average low-temperature, in August, is 61.2°F (16.2°C).

Heat index

In August, the average heat index is estimated at a tropical 88°F (31.1°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, clothing, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in August is 70.6%.

Rainfall

In Hartford, during 10 rainfall days, 3.9" (99.8mm) of precipitation is typically accumulated. Throughout the year, there are 130 rainfall days, and 45.9" (1164.6mm) of precipitation is accumulated.

Snowfall

In Hartford snow does not fall in May through October.

Daylight

In August, the average length of the day in Hartford is 13.8h.

Sunshine

In Hartford, the average sunshine in August is 8.7h.

UV index

Months with the highest UV index in Hartford, Connecticut, are June through August, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high health risk from unsafe exposure to the UV radiation for the average person.
Note: In August, the average maximum UV index of 8 translate into the following recommendations:
Take extra precautions. Protection against sun damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in August in Hartford?

In August, the average high-temperature is 82.8°F (28.2°C), and the average low-temperature is 61.2°F (16.2°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that factores the actual air temperature with the relative humidity, in August is estimated at 88°F (31.1°C).

What is the average humidity in August in Hartford?

The average relative humidity in August in Hartford is 70.6%.

How many days does it rain in August in Hartford?

In Hartford, in August, during 10 rainfall days, 3.9" (99.8mm) of precipitation is typically accumulated.

When it does not snow in Hartford?

In Hartford snow does not fall in May through October.

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

In August, the average length of the day in Hartford, Connecticut, is 13.8h.

How long on average sun shines in August in Hartford?

The average sunshine in August in Hartford is 8.7h.

When is the highest UV index in Hartford?

June through August, with an average maximum UV index of 8, are months with the highest UV index.

What is the UV index intensity in August in Hartford?

In August, the average daily maximum UV index in Hartford, Connecticut, is 8. A UV Index reading of 8 to 10 represents a very high health risk from the exposure to the Sun's UV radiation.
Average temperature in August - Hartford, CT
  • Average high temperature in August: 82.7°F

The warmest month (with the highest average high temperature) is July (84.5°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in August: 61.1°F

The month with the highest average low temperature is July (62.7°F).
The coldest month (with the lowest average low temperature) is January (17.7°F).

Average humidity in August - Hartford, CT
  • Average humidity in August: 70.6%

The month with the highest relative humidity is September (72.9%).
The month with the lowest relative humidity is April (58%).

Average rainfall in August - Hartford, CT
  • Average rainfall in August: 3.9"

Wettest months (with the highest rainfall) are May, June and October (4.4").
The driest month (with the lowest rainfall) is February (2.9").

Average rainfall days in August - Hartford, CT
  • Average rainfall days in August: 10 days

The month with the highest number of rainy days is May (12.8 days).
The month with the lowest number of rainy days is February (9.7 days).

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

The month with the highest snowfall is January (12.3").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (5.8 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August / Average sunshine in August - Hartford, CT
  • Average daylight in August: 13.8h

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

  • Average sunshine in August: 8.7h

The month with most sunshine is July (Average sunshine: 9.5h).
The month with least sunshine is December (Average sunshine: 4.5h).

Average UV index in August - Hartford, CT
  • Average UV index in August: 8

Months with the highest UV index are June, July and August (UV index 8).
Months with the lowest UV index are January and December (UV index 1).