July weather forecast and climate
Chatham, NY

Weather in July

July, the same as June, is a moderately hot summer month in Chatham, New York, with average temperature varying between 80.8°F (27.1°C) and 59°F (15°C).

Temperature

July is the warmest month, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 59°F (15°C).

Heat index

The average heat index is computed to be 85.5°F (29.7°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. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, metabolic differences, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in Chatham is 77%.

Rainfall

The month with the most rainfall is July when the rain falls for 14.9 days and typically aggregates up to 2.4" (61mm) of precipitation.

Snowfall

In Chatham snow does not fall in June through September.

Daylight

The average length of the day in Chatham is 14.9h.

Sunshine

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

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index in Chatham, New York. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In July, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the warmest month in Chatham?

July is the warmest month in Chatham, New York, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 59°F (15°C).

What is the temperature in July in Chatham?

In Chatham, in July, the average high-temperature is 80.8°F (27.1°C), and the average low-temperature is 59°F (15°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in July is computed to be 85.5°F (29.7°C).

What is the average humidity in July in Chatham?

In July, the average relative humidity in Chatham, New York, is 77%.

What is the wettest month in Chatham?

The month with the most rainfall in Chatham, New York, is July when the rain falls for 14.9 days and typically aggregates up to 2.4" (61mm) of precipitation.

How many days does it rain in July in Chatham?

In Chatham, New York, during July, the rain falls for 14.9 days and regularly aggregates up to 2.4" (61mm) of precipitation.

When it does not snow in Chatham?

In Chatham snow does not fall in June through September.

What is the average length of the day in July in Chatham?

In Chatham, the average length of the day in July is 14.9h.

What are the months with the most sunshine in Chatham?

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

How long on average sun shines in July in Chatham?

The average sunshine in July in Chatham is 10.3h.

What are the months with the highest UV index in Chatham?

May through August, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index intensity in July in Chatham?

In July, the average daily maximum UV index in Chatham, New York, is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in July
Chatham, NY

Average temperature in July - Chatham, NY
  • Average high temperature in July: 80.8°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (29.1°F).

  • Average low temperature in July: 59°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).

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Average pressure in July
Chatham, NY

Average pressure in July - Chatham, NY
  • Average pressure in July: 29.95"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in July
Chatham, NY

Average wind speed in July - Chatham, NY
  • Average wind speed in July: 5.2mph

The windiest months (with the highest average wind speed) are January and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in July
Chatham, NY

Average humidity in July - Chatham, NY
  • Average humidity in July: 77%

Months with the highest relative humidity are February and December (83%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in July
Chatham, NY

Average rainfall in July - Chatham, NY
  • Average rainfall in July: 2.4"

The wettest month (with the highest rainfall) is July (2.4").
The driest month (with the least rainfall) is January (1.1").

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Average rainfall days in July
Chatham, NY

Average rainfall days in July - Chatham, NY
  • Average rainfall days in July: 14.9 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (5.7 days).

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Average snowfall in July
Chatham, NY

Average snowfall in July - Chatham, NY
  • Average snowfall in July: 0"

The month with the highest snowfall is March (3.9").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in July
Chatham, NY

Average snowfall days in July - Chatham, NY
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (9.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Chatham, NY

Average daylight in July / Average sunshine in July - Chatham, NY
  • Average daylight in July: 14.9h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in July: 10.3h

Months with the most sunshine are July and August (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 3.8h).

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Average sunshine days in July
Chatham, NY

Average sunshine days in July - Chatham, NY
  • Average sunshine days in July: 14.3 days

The month with the most sunshine days is January (20 days).
The month with the least sunshine days is June (12.5 days).

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Average UV index in July
Chatham, NY

Average UV index in July - Chatham, NY
  • Average UV index in July: 5

Months with the highest UV index are May, June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in July
Chatham, NY

Average cloud cover in July - Chatham, NY
  • Average cloud cover in July: 35

The month with the most cloud cover is February (Cloud cover 58).
Months with the least cloud cover are July and August (Cloud cover 35).

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Average visibility in July
Chatham, NY

Average visibility in July - Chatham, NY
  • Average visibility in July: 5mi

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

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