May weather forecast
Holtsville, NY

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Weather in May

May, the last month of the spring in Holtsville, is a comfortable month, with an average temperature varying between 61.2°F (16.2°C) and 54.3°F (12.4°C).

Temperature

In Holtsville, stepping into May brings a gentle temperature nudge, moving slightly up from April's fresh 52.3°F (11.3°C) to a refreshing 61.2°F (16.2°C). May introduces a small decrease to a nighttime average of 54.3°F (12.4°C) in Holtsville.

Humidity

May and June, with an average relative humidity of 78%, are the most humid months.

Rainfall

In Holtsville, New York, during May, the rain falls for 16.1 days and regularly aggregates up to 2.91" (74mm) of precipitation. In Holtsville, during the entire year, the rain falls for 155.3 days and collects up to 34.84" (885mm) of precipitation.

Snowfall

Months with snowfall are January through March, May, October and December. May is the first month it typically snows in Holtsville. Throughout May, in the average 0.1 snowfall days, it receives 0.16" (4mm) of snow. In Holtsville, New York, during the entire year, snow falls for 14.7 days and aggregates up to 6.14" (156mm) of snow.

Daylight

In Holtsville, the average length of the day in May is 14h and 29min.
On the first day of May, sunrise is at 5:49 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 5:22 am and sunset at 8:17 pm EDT.

Sunshine

In May, the average sunshine is 8.9h.

UV index

In Holtsville, New York, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes 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:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoiding the Sun during its peak radiation time around midday is a healthy practice. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What is the average May temperature in Holtsville?

The high-temperature during May is 61.2°F (16.2°C) and the low-temperature is 54.3°F (12.4°C).

What are the most humid months in Holtsville?

May and June, with an average relative humidity of 78%, are most humid months in Holtsville, New York.

What is the average humidity in May in Holtsville?

The average relative humidity in May in Holtsville, New York, is 78%.

How much does it rain in Holtsville in May?

In Holtsville, New York, during May, the rain falls for 16.1 days and regularly aggregates up to 2.91" (74mm) of precipitation.

When does it start to snow in Holtsville?

May is the first month it typically snows in Holtsville. Throughout May, in the average 0.1 snowfall days, it receives 0.16" (4mm) of snow.

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

In May, the average day length in Holtsville is 14h and 29min.

When is the sunrise / sunset in May in Holtsville?

On the first day of May in Holtsville, sunrise is at 5:49 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 5:22 am and sunset at 8:17 pm EDT.

How long on average sun shines in May in Holtsville?

In Holtsville, the average sunshine duration in May is 8.9h.

How high is the UV index in May in Holtsville?

In May, the average daily maximum UV index in Holtsville, New York, is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
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
Holtsville, NY

Average temperature in May - Holtsville, NY
  • Average high temperature in May: 61.2°F

The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in May: 54.3°F

The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

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Average pressure in May
Holtsville, NY

Average pressure in May - Holtsville, NY
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Holtsville, NY

Average wind speed in May - Holtsville, NY
  • Average wind speed in May: 10.1mph

The windiest month (with the highest average wind speed) is January (13.8mph).
The calmest months (with the lowest average wind speed) are July and August (9mph).

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Average humidity in May
Holtsville, NY

Average humidity in May - Holtsville, NY
  • Average humidity in May: 78%

The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).

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Average rainfall in May
Holtsville, NY

Average rainfall in May - Holtsville, NY
  • Average rainfall in May: 2.91"

The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is January (2.17").

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Average rainfall days in May
Holtsville, NY

Average rainfall days in May - Holtsville, NY
  • Average rainfall days in May: 16.1 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in May
Holtsville, NY

Average snowfall in May - Holtsville, NY
  • Average snowfall in May: 0.16"

The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, June, July, August, September and November (0").

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Average snowfall days in May
Holtsville, NY

Average snowfall days in May - Holtsville, NY
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (4.6 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
Holtsville, NY

Average daylight in May / Average sunshine in May - Holtsville, NY
  • Average daylight in May: 14h and 3min

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

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in May
Holtsville, NY

Average sunshine days in May - Holtsville, NY
  • Average sunshine days in May: 13.5 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is July (11.3 days).

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Average UV index in May
Holtsville, NY

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).

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Average cloud cover in May
Holtsville, NY

Average cloud cover in May - Holtsville, NY
  • Average cloud cover in May: 42

The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in May
Holtsville, NY

Average visibility in May - Holtsville, NY
  • Average visibility in May: 6mi

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

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Holtsville, New York, USA

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