May weather forecast and climate
Chatham, NY

Weather in May

The last month of the spring, May, is an enjoyable month in Chatham, New York, with average temperature ranging between min 46.6°F (8.1°C) and max 67.3°F (19.6°C).

Temperature

In Chatham, the average high-temperature rises, from a cool 54.3°F (12.4°C) in April, to an enjoyable 67.3°F (19.6°C). The average low-temperature, in May, is 46.6°F (8.1°C).

Humidity

In Chatham, the average relative humidity is 77%.

Rainfall

In May, the rain falls for 15.8 days. Throughout May, 2.05" (52mm) of precipitation is accumulated. Throughout the year, in Chatham, New York, there are 135.1 rainfall days, and 20.39" (518mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Chatham. During 0.3 snowfall days, Chatham aggregates 0.39" (10mm) of snow. In Chatham, during the entire year, snow falls for 36.9 days, and aggregates up to 15.98" (406mm) of snow.

Daylight

In May, the average length of the day in Chatham is 14.6h.

Sunshine

In May, the average sunshine in Chatham, New York, is 8.7h.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in May in Chatham?

The average relative humidity in May in Chatham, New York, is 77%.

How much does it rain in Chatham in May?

In May, the rain falls for 15.8 days. Throughout May, 2.05" (52mm) of precipitation is accumulated.

What is the last month it snows in Chatham?

May is the last month it regularly snows in Chatham. During 0.3 snowfall days, in May, Chatham aggregates 0.39" (10mm) of snow.

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

In May, the average length of the day is 14.6h.

How long on average sun shines in May in Chatham?

In Chatham, the average sunshine in May is 8.7h.

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

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

What is the UV index intensity in May in Chatham?

In Chatham, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in May
Chatham, NY

Average temperature in May - Chatham, NY
  • Average high temperature in May: 67.3°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 May: 46.6°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 May
Chatham, NY

Average pressure in May - Chatham, NY
  • Average pressure in May: 30"

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 May
Chatham, NY

Average wind speed in May - Chatham, NY
  • Average wind speed in May: 6.5mph

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 May
Chatham, NY

Average humidity in May - Chatham, NY
  • Average humidity in May: 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 May
Chatham, NY

Average rainfall in May - Chatham, NY
  • Average rainfall in May: 2.05"

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 May
Chatham, NY

Average rainfall days in May - Chatham, NY
  • Average rainfall days in May: 15.8 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 May
Chatham, NY

Average snowfall in May - Chatham, NY
  • Average snowfall in May: 0.39"

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 May
Chatham, NY

Average snowfall days in May - Chatham, NY
  • Average snowfall days in May: 0.3 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 May /
Average sunshine in May
Chatham, NY

Average daylight in May / Average sunshine in May - Chatham, NY
  • Average daylight in May: 14.6h

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 May: 8.7h

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 May
Chatham, NY

Average sunshine days in May - Chatham, NY
  • Average sunshine days in May: 13.1 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 May
Chatham, NY

Average UV index in May - Chatham, NY
  • Average UV index in May: 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 May
Chatham, NY

Average cloud cover in May - Chatham, NY
  • Average cloud cover in May: 46

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 May
Chatham, NY

Average visibility in May - Chatham, NY
  • Average visibility in May: 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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