May weather forecast
Castleton, IN

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Weather in May

May, the last month of the spring in Castleton, is a pleasant month, with an average temperature fluctuating between 71.8°F (22.1°C) and 55.4°F (13°C).

Temperature

May brings an increase in the average high-temperature, progressing from a comfortable 61°F (16.1°C) in April to an agreeable 71.8°F (22.1°C). Castleton, in the month of May, anticipates a consistent average low-temperature of 55.4°F (13°C).

Humidity

In May, the average relative humidity is 78%.

Rainfall

The month with the most rainfall is May, when the rain falls for 17.4 days and typically aggregates up to 2.64" (67mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In May, the average length of the day is 14h and 24min.
On the first day of the month, sunrise is at 6:43 am and sunset at 8:39 pm. On the last day of May, sunrise is at 6:17 am and sunset at 9:06 pm EDT.

Sunshine

In Castleton, the average sunshine in May is 8.5h.

UV index

In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 5 during May translates into the following directions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Castleton in May?

Castleton in May has an average high-temperature of 71.8°F (22.1°C) and an average low-temperature of 55.4°F (13°C).

What is the average humidity in May?

In Castleton, the average relative humidity in May is 78%.

What is the wettest month?

The month with the most rainfall is May, when the rain falls for 17.4 days and typically aggregates up to 2.64" (67mm) of precipitation.

How much does it rain in May?

In Castleton, in May, during 17.4 rainfall days, 2.64" (67mm) of precipitation is typically accumulated.

When it does not snow in Castleton?

May through September are months without snowfall.

Does it snow in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May?

In May, the average day length is 14h and 24min.

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 6:43 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 9:06 pm EDT.

How many hours of sunshine does Castleton have in May?

The average sunshine duration in May is 8.5h.

What is the UV index intensity in May?

In May, the average daily maximum UV index in Castleton is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Castleton, IN

Average temperature in May - Castleton, IN
  • Average high temperature in May: 71.8°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in May: 55.4°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in May
Castleton, IN

Average pressure in May - Castleton, IN
  • Average pressure in May: 29.97"Hg

The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in May
Castleton, IN

Average wind speed in May - Castleton, IN
  • Average wind speed in May: 8.1mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

Average humidity in May
Castleton, IN

Average humidity in May - Castleton, IN
  • Average humidity in May: 78%

The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).

Average rainfall in May
Castleton, IN

Average rainfall in May - Castleton, IN
  • Average rainfall in May: 2.64"

The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is February (1.18").

Average rainfall days in May
Castleton, IN

Average rainfall days in May - Castleton, IN
  • Average rainfall days in May: 17.4 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (6 days).

Average snowfall in May
Castleton, IN

Average snowfall in May - Castleton, IN
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Castleton, IN

Average snowfall days in May - Castleton, IN
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Castleton, IN

Average daylight in May / Average sunshine in May - Castleton, IN
  • 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 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

Average sunshine days in May
Castleton, IN

Average sunshine days in May - Castleton, IN
  • Average sunshine days in May: 11.3 days

The months with the most sunshine days are October and November (18.7 days).
The month with the least sunshine days is May (11.3 days).

Average UV index in May
Castleton, IN

Average UV index in May - Castleton, IN
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in May
Castleton, IN

Average cloud cover in May - Castleton, IN
  • Average cloud cover in May: 42

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in May
Castleton, IN

Average visibility in May - Castleton, IN
  • 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).

Castleton, Indiana, USA

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