May weather forecast
Westbury, PA

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Weather in May

The last month of the spring, May, is an agreeable month in Westbury, Pennsylvania, with an average temperature fluctuating between 53.6°F (12°C) and 71.2°F (21.8°C).

Temperature

The arrival of May brings a temperature shift, with the average high-temperature escalating from a mild 60.6°F (15.9°C) in April to an agreeable 71.2°F (21.8°C). Westbury's average low-temperature is measured at a fresh 53.6°F (12°C) during May.

Humidity

The average relative humidity in May is 76%.

Rainfall

In Westbury, in May, it is raining for 8.1 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, in Westbury, Pennsylvania, there are 83.7 rainfall days, and 6.22" (158mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. May is the last month it regularly snows in Westbury. During 0.1 snowfall days, in May, Westbury aggregates 0.16" (4mm) of snow. In Westbury, during the entire year, snow falls for 12.6 days and aggregates up to 1.73" (44mm) of snow.

Daylight

In Westbury, the average length of the day in May is 14h and 25min.
On the first day of the month, sunrise is at 5:59 am and sunset at 7:55 pm. On the last day of May, sunrise is at 5:33 am and sunset at 8:23 pm EDT.

Sunshine

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

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 6 during May leads to these instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Updated: Aug 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

In Westbury, in May, the average high-temperature is 71.2°F (21.8°C), and the average low-temperature is 53.6°F (12°C).

What is the average humidity in May?

In Westbury, the average relative humidity in May is 76%.

How many days does it rain in May?

In Westbury, during May, the rain falls for 8.1 days and regularly aggregates up to 0.59" (15mm) of precipitation.

What is the last month it snows?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Westbury aggregates 0.16" (4mm) of snow.

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

In May, the average day length is 14h and 25min.

When are sunrise and sunset in May?

On the first day of May, sunrise is at 5:59 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:23 pm EDT.

How long on average sun shines in May?

In Westbury, the average sunshine duration in May is 8.7h.

When is the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

How high is the UV index in May?

In May, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe 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
Westbury, PA

Average temperature in May - Westbury, PA
  • Average high temperature in May: 71.2°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in May: 53.6°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in May
Westbury, PA

Average pressure in May - Westbury, PA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in May
Westbury, PA

Average wind speed in May - Westbury, PA
  • Average wind speed in May: 6.6mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity in May
Westbury, PA

Average humidity in May - Westbury, PA
  • Average humidity in May: 76%

The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).

Average rainfall in May
Westbury, PA

Average rainfall in May - Westbury, PA
  • Average rainfall in May: 0.59"

The wettest month (with the highest rainfall) is December (0.75").
The driest month (with the least rainfall) is September (0.2").

Average rainfall days in May
Westbury, PA

Average rainfall days in May - Westbury, PA
  • Average rainfall days in May: 8.1 days

The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in May
Westbury, PA

Average snowfall in May - Westbury, PA
  • Average snowfall in May: 0.16"

The month with the highest snowfall is February (0.43").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in May
Westbury, PA

Average snowfall days in May - Westbury, PA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Westbury, PA

Average daylight in May / Average sunshine in May - Westbury, PA
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in May: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in May
Westbury, PA

Average sunshine days in May - Westbury, PA
  • Average sunshine days in May: 19.6 days

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is July (17.4 days).

Average UV index in May
Westbury, PA

Average UV index in May - Westbury, PA
  • Average UV index in May: 6

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

Average cloud cover in May
Westbury, PA

Average cloud cover in May - Westbury, PA
  • Average cloud cover in May: 46

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in May
Westbury, PA

Average visibility in May - Westbury, PA
  • Average visibility in May: 5mi

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

Westbury, Pennsylvania, USA

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