May weather forecast
Harrison, MT

Share

Weather in May

The last month of the spring, May, is an enjoyable month in Harrison, Montana, with an average temperature ranging between min 37.9°F (3.3°C) and max 62.6°F (17°C).

Temperature

The commencement of May sees a shift in the average high-temperature, moving from a cool 50.4°F (10.2°C) in April to a comfortable 62.6°F (17°C). Throughout May nights, a significant departure from daytime temperatures, with an average low of 37.9°F (3.3°C), is recognized in Harrison.

Humidity

The average relative humidity in May in Harrison is 60%.

Rainfall

In Harrison, in May, it is raining for 15.9 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, there are 134.2 rainfall days, and 11.34" (288mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall in Harrison. In Harrison, Montana, during May, snow falls for 1.3 days and regularly aggregates up to 0.83" (21mm) of snow. In Harrison, during the entire year, snow falls for 79.6 days and aggregates up to 30.08" (764mm) of snow.

Daylight

The average length of the day in May is 14h and 57min.
On the first day of May, sunrise is at 6:13 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 9:08 pm MDT.

Sunshine

The average sunshine in May in Harrison is 10.7h.

UV index

In May, the average daily maximum UV index in Harrison, Montana, is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 4 in May translates into these instructions:
Ensure safety - Recommendations to avert sunburn are presented. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
[Resources]

Frequently asked questions

What are May temperatures in Harrison?

Harrison in May has an average high-temperature of 62.6°F (17°C) and an average low-temperature of 37.9°F (3.3°C).

What is the average humidity in May in Harrison?

The average relative humidity in May in Harrison, Montana, is 60%.

How much does it rain in Harrison in May?

In Harrison, Montana, during May, the rain falls for 15.9 days and regularly aggregates up to 1.42" (36mm) of precipitation.

How many days does it snow in May in Harrison?

In Harrison, Montana, in May, during 1.3 snowfall days, 0.83" (21mm) of snow is typically accumulated.

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

In Harrison, the average day length in May is 14h and 57min.

When is the sunrise / sunset in May in Harrison?

On the first day of May in Harrison, Montana, sunrise is at 6:13 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 9:08 pm MDT.

How many hours of sunshine does Harrison have in May?

In Harrison, the average sunshine duration in May is 10.7h.

What is the UV index reading in May in Harrison?

In May, the average daily maximum UV index in Harrison, Montana, is 4. A UV Index estimate 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
Harrison, MT

Average temperature in May - Harrison, MT
  • Average high temperature in May: 62.6°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28°F).

  • Average low temperature in May: 37.9°F

The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (12.7°F).

[Resources]

Average pressure in May
Harrison, MT

Average pressure in May - Harrison, MT
  • Average pressure in May: 29.94"Hg

The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

[Resources]

Average wind speed in May
Harrison, MT

Average wind speed in May - Harrison, MT
  • Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

[Resources]

Average humidity in May
Harrison, MT

Average humidity in May - Harrison, MT
  • Average humidity in May: 60%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (44%).

[Resources]

Average rainfall in May
Harrison, MT

Average rainfall in May - Harrison, MT
  • Average rainfall in May: 1.42"

The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is August (0.51").

[Resources]

Average rainfall days in May
Harrison, MT

Average rainfall days in May - Harrison, MT
  • Average rainfall days in May: 15.9 days

The month with the highest number of rainy days is April (16.5 days).
The month with the least rainy days is August (7.6 days).

[Resources]

Average snowfall in May
Harrison, MT

Average snowfall in May - Harrison, MT
  • Average snowfall in May: 0.83"

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

[Resources]

Average snowfall days in May
Harrison, MT

Average snowfall days in May - Harrison, MT
  • Average snowfall days in May: 1.3 days

The month with the highest number of snowfall days is February (16.5 days).
The months with the least snowfall days are July and August (0 days).

[Resources]

Average daylight in May /
Average sunshine in May
Harrison, MT

Average daylight in May / Average sunshine in May - Harrison, MT
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in May: 10h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

[Resources]

Average sunshine days in May
Harrison, MT

Average sunshine days in May - Harrison, MT
  • Average sunshine days in May: 10.5 days

The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is April (9.3 days).

[Resources]

Average UV index in May
Harrison, MT

Average UV index in May - Harrison, MT
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

[Resources]

Average cloud cover in May
Harrison, MT

Average cloud cover in May - Harrison, MT
  • Average cloud cover in May: 30

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 13).

[Resources]

Average visibility in May
Harrison, MT

Average visibility in May - Harrison, MT
  • Average visibility in May: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

[Resources]

Harrison, Montana, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location