May weather forecast
Lyman, WY

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Weather in May

May witnesses a significant increase in temperatures in Lyman, Wyoming, peaking at about 57°F (13.9°C). With a generous offering of 14.5 daylight hours, the condition is ideal for exploring the city’s outdoor charm. Flowering trees and landscapes signify a full transition into spring. The month's rain showers invigorate the cityscape bringing about lush scenery. By this time, the effects of winter have fully dissipated, paving the way for the warmer months.

Temperature

May's arrival brings a change in high-temperatures, moving from a chilly 45.9°F (7.7°C) in April to a moderate 57°F (13.9°C). During May, Lyman witnesses a consistent average low-temperature of 37.8°F (3.2°C).

Humidity

The average relative humidity in May is 53%.

Rainfall

The month with the most rainfall is May, when the rain falls for 16.1 days and typically aggregates up to 2.01" (51mm) of precipitation.

Snowfall

Months with snowfall are January through June, September through December. In Lyman, in May, snow falls for 4 days, with typically accumulated 2.01" (51mm) of snow. In Lyman, during the entire year, snow falls for 85.7 days and aggregates up to 41.18" (1046mm) of snow.

Daylight

In May, the average length of the day is 14h and 32min.
On the first day of May, sunrise is at 6:17 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:47 pm MDT.

Sunshine

The average sunshine in May in Lyman is 11h.

UV index

In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 4 in May suggests the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

Frequently asked questions

What is the average May temperature?

The average high-temperature and low-temperature during May are 57°F (13.9°C) and 37.8°F (3.2°C) respectively.

What is the average humidity in May?

The average relative humidity in May is 53%.

What is the wettest month?

May is the month with the most rainfall. Rain falls for 16.1 days and accumulates 2.01" (51mm) of precipitation.

How many days does it rain in May?

In Lyman, in May, during 16.1 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.

How many days does it snow in May?

In Lyman, during May, snow falls for 4 days and regularly aggregates up to 2.01" (51mm) of snow.

How many hours of daylight does Lyman have in May?

In Lyman, the average day length in May is 14h and 32min.

What time are sunrise and sunset in May?

On the first day of May, sunrise is at 6:17 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:47 pm MDT.

How many hours of sunshine does Lyman have in May?

In May, the average sunshine duration is 11h.

What is the UV index reading in May?

In Lyman, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Lyman, WY

Average temperature in May - Lyman, WY
  • Average high temperature in May: 57°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (26.6°F).

  • Average low temperature in May: 37.8°F

The month with the highest average low temperature is July (55.6°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).

Average pressure in May
Lyman, WY

Average pressure in May - Lyman, WY
  • Average pressure in May: 29.9"Hg

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in May
Lyman, WY

Average wind speed in May - Lyman, WY
  • Average wind speed in May: 9.2mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).

Average humidity in May
Lyman, WY

Average humidity in May - Lyman, WY
  • Average humidity in May: 53%

The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are July and August (36%).

Average rainfall in May
Lyman, WY

Average rainfall in May - Lyman, WY
  • Average rainfall in May: 2.01"

The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are January and July (0.63").

Average rainfall days in May
Lyman, WY

Average rainfall days in May - Lyman, WY
  • Average rainfall days in May: 16.1 days

The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is November (6 days).

Average snowfall in May
Lyman, WY

Average snowfall in May - Lyman, WY
  • Average snowfall in May: 2.01"

The month with the highest snowfall is March (8.78").
The months with the least snowfall are July and August (0").

Average snowfall days in May
Lyman, WY

Average snowfall days in May - Lyman, WY
  • Average snowfall days in May: 4 days

The month with the highest number of snowfall days is March (15.1 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in May /
Average sunshine in May
Lyman, WY

Average daylight in May / Average sunshine in May - Lyman, WY
  • 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: 11h and 0min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in May
Lyman, WY

Average sunshine days in May - Lyman, WY
  • Average sunshine days in May: 10.8 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is April (9.4 days).

Average UV index in May
Lyman, WY

Average UV index in May - Lyman, WY
  • Average UV index in May: 4

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in May
Lyman, WY

Average cloud cover in May - Lyman, WY
  • Average cloud cover in May: 24

The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 12).

Average visibility in May
Lyman, WY

Average visibility in May - Lyman, WY
  • Average visibility in May: 6mi

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

Lyman, Wyoming, USA

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