May weather forecast
Rotterdam, NY

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Weather in May

The last month of the spring, May, is a pleasant month in Rotterdam, New York, with an average temperature ranging between min 47.3°F (8.5°C) and max 68°F (20°C).

Temperature

May's onset is marked by a temperature increase, moving from a cool 54.3°F (12.4°C) in April to an agreeable 68°F (20°C). The temperature in Rotterdam dips to an average of 47.3°F (8.5°C) during May nights.

Humidity

In Rotterdam, New York, the average relative humidity in May is 75%.

Rainfall

May is the month with the most rainfall. Rain falls for 16 days and accumulates 2.83" (72mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Rotterdam. May is the last month it regularly snows in Rotterdam, New York. During 0.3 snowfall days, in May, Rotterdam aggregates 0.2" (5mm) of snow. Throughout the year, in Rotterdam, there are 36.5 snowfall days, and 22.56" (573mm) of snow is accumulated.

Daylight

In Rotterdam, the average length of the day in May is 14h and 40min.
On the first day of the month, sunrise is at 5:48 am and sunset at 7:56 pm. On the last day of May, in Rotterdam, sunrise is at 5:20 am and sunset at 8:27 pm EDT.

Sunshine

In May, the average sunshine is 8.8h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In May, the maximum UV index of 5 translates into these guidelines:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Frequently asked questions

What are the temperatures in Rotterdam in May?

An average high-temperature, in May, in Rotterdam, is 68°F (20°C) and the average low-temperature is 47.3°F (8.5°C).

What is the average humidity in May in Rotterdam?

In May, the average relative humidity in Rotterdam is 75%.

What is the rainiest month in Rotterdam?

The month with the most rainfall is May, when the rain falls for 16 days and typically aggregates up to 2.83" (72mm) of precipitation.

How many days does it rain in May in Rotterdam?

In Rotterdam, New York, in May, during 16 rainfall days, 2.83" (72mm) of precipitation is typically accumulated.

What is the last month it snows in Rotterdam?

May is the last month it regularly snows in Rotterdam. During 0.3 snowfall days, in May, Rotterdam aggregates 0.2" (5mm) of snow.

How many hours of daylight does Rotterdam have in May?

The average day length in May is 14h and 40min.

When is the sunrise / sunset in May in Rotterdam?

On the first day of May, sunrise is at 5:48 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:20 am and sunset at 8:27 pm EDT.

How many hours of sunshine does Rotterdam have in May?

The average sunshine duration in May in Rotterdam, New York, is 8.8h.

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

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

What is the UV index reading in May in Rotterdam?

In May, the average daily maximum UV index in Rotterdam, New York, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to 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 May
Rotterdam, NY

Average temperature in May - Rotterdam, NY
  • Average high temperature in May: 68°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (28.6°F).

  • Average low temperature in May: 47.3°F

The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).

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Average pressure in May
Rotterdam, NY

Average pressure in May - Rotterdam, NY
  • Average pressure in May: 29.99"Hg

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

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Average wind speed in May
Rotterdam, NY

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

The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in May
Rotterdam, NY

Average humidity in May - Rotterdam, NY
  • Average humidity in May: 75%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in May
Rotterdam, NY

Average rainfall in May - Rotterdam, NY
  • Average rainfall in May: 2.83"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (1.57").

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Average rainfall days in May
Rotterdam, NY

Average rainfall days in May - Rotterdam, NY
  • Average rainfall days in May: 16 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is January (6.2 days).

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Average snowfall in May
Rotterdam, NY

Average snowfall in May - Rotterdam, NY
  • Average snowfall in May: 0.2"

The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Rotterdam, NY

Average snowfall days in May - Rotterdam, NY
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is February (9.5 days).
The 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
Rotterdam, NY

Average daylight in May / Average sunshine in May - Rotterdam, NY
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days in May
Rotterdam, NY

Average sunshine days in May - Rotterdam, NY
  • Average sunshine days in May: 13.3 days

The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is April (12.6 days).

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Average UV index in May
Rotterdam, NY

Average UV index in May - Rotterdam, NY
  • Average UV index in May: 5

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in May
Rotterdam, NY

Average cloud cover in May - Rotterdam, NY
  • Average cloud cover in May: 44

The month with the most cloud cover is February (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 32).

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Average visibility in May
Rotterdam, NY

Average visibility in May - Rotterdam, NY
  • Average visibility in May: 5mi

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

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Rotterdam, New York, USA

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