August weather forecast and climate
Somerville, NJ

August, the last month of the summer, in Somerville, is another warm month, with temperature in the range of an average high of 82.4°F (28°C) and an average low of 64.6°F (18.1°C).

Temperature

In August, the average high-temperature is practically the same as in July - a still warm 82.4°F (28°C). In Somerville, New Jersey, in August, the average low-temperature is 64.6°F (18.1°C).

Heat index

In August, the average heat index is estimated at a tropical 88.5°F (31.4°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, clothing, pregnancy), and activity. 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 especially crucial for babies and toddlers. 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 Somerville is 75%.

Rainfall

In Somerville, it is raining for 15.5 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, in Somerville, there are 157.9 rainfall days, and 28.19" (716mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In Somerville, the average length of the day in August is 13.7h.

Sunshine

The average sunshine in August is 10h.

UV index

Months with the highest UV index in Somerville are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in August interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Somerville?

In August, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 64.6°F (18.1°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that calculates temperature value influenced by the moisture in the air, in August is estimated at 88.5°F (31.4°C).

What is the average humidity in August in Somerville?

The average relative humidity in August in Somerville, New Jersey, is 75%.

How many days does it rain in August in Somerville?

In Somerville, New Jersey, in August, it is raining for 15.5 days, with typically 2.56" (65mm) of accumulated precipitation.

When it does not snow in Somerville?

In Somerville, New Jersey, snow does not fall in June through September.

How many hours of daylight does Somerville have in August?

In Somerville, New Jersey, the average length of the day in August is 13.7h.

How long on average sun shines in August in Somerville?

In August, the average sunshine in Somerville, New Jersey, is 10h.

When is the highest UV index in Somerville?

Months with the highest UV index in Somerville, New Jersey, are June through August, with an average maximum UV index of 6.

What is the UV index reading in August in Somerville?

In Somerville, New Jersey, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in August - Somerville, NJ
  • Average high temperature in August: 28°C

The warmest month (with the highest average high temperature) is July (29°C).
The month with the lowest average high temperature is January (2°C).

  • Average low temperature in August: 18.1°C

The month with the highest average low temperature is July (18.9°C).
The coldest month (with the lowest average low temperature) is January (-4.9°C).

Average pressure in August - Somerville, NJ
  • Average pressure in August: 1015.5mbar

The month with the highest atmospheric pressure is November (1019.7mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in August - Somerville, NJ
  • Average wind speed in August: 8.6km/h

The windiest month (with the highest average wind speed) is March (13.9km/h).
The calmest month (with the lowest average wind speed) is August (8.6km/h).

Average humidity in August - Somerville, NJ
  • Average humidity in August: 75%

Months with the highest relative humidity are February, October and December (79%).
The month with the lowest relative humidity is April (74%).

Average rainfall in August - Somerville, NJ
  • Average rainfall in August: 65mm

The wettest month (with the highest rainfall) is December (74mm).
The driest month (with the least rainfall) is September (39mm).

Average rainfall days in August - Somerville, NJ
  • Average rainfall days in August: 15.5 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (9 days).

Average snowfall in August - Somerville, NJ
  • Average snowfall in August: 0mm

The month with the highest snowfall is March (72mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in August - Somerville, NJ
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August / Average sunshine in August - Somerville, NJ
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in August: 10h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in August - Somerville, NJ
  • Average sunshine days in August: 13.1 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (11.7 days).

Average UV index in August - Somerville, NJ
  • Average UV index in August: 6

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).

Average cloud cover in August - Somerville, NJ
  • Average cloud cover in August: 34

Months with the most cloud cover are February and December (Cloud cover 49).
Months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in August - Somerville, NJ
  • Average visibility in August: 9km

Months with the highest visibility are January, February, March, April, June, July, August, October, November and December (9km).
Months with the lowest visibility are May and September (8km).