May weather forecast
Hamilton, MT

A strong suspension bridge over a fast river in Hamilton, Montana, overlooking scenic trees and hilly landscapes over the other side of the shore
A strong suspension bridge over a fast river in Hamilton, Montana, overlooking scenic trees and hilly landscapes over the other side of the shore

Weather in May

May, the last month of the spring in Hamilton, is a moderate month, with an average temperature varying between 33.4°F (0.8°C) and 56.7°F (13.7°C).

Temperature

In Hamilton, Montana, the average high-temperature in May increases from a chilly 43.5°F (6.4°C) in April to a mild 56.7°F (13.7°C). In Hamilton, the average low-temperature is 33.4°F (0.8°C).

Humidity

In May, the average relative humidity in Hamilton is 71%.

Rainfall

In May, in Hamilton, the rain falls for 19.5 days. Throughout May, 1.97" (50mm) of precipitation is accumulated. Throughout the year, there are 163.6 rainfall days, and 20.83" (529mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. May is the last month it regularly snows in Hamilton. During 2.3 snowfall days, in May, Hamilton aggregates 0.67" (17mm) of snow. In Hamilton, during the entire year, snow falls for 101.1 days and aggregates up to 59.17" (1503mm) of snow.

Daylight

In Hamilton, the average length of the day in May is 15h and 1min.
On the first day of the month, sunrise is at 6:22 am and sunset at 8:45 pm. On the last day of May, sunrise is at 5:48 am and sunset at 9:20 pm MDT.

Sunshine

The average sunshine in May is 10.4h.

UV index

In Hamilton, Montana, the average daily maximum UV index in May 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: The average daily UV index of 4 in May transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Hamilton?

In May, in Hamilton, Montana, the average high-temperature is 56.7°F (13.7°C), and the average low-temperature is 33.4°F (0.8°C).

What is the average humidity in May in Hamilton?

In Hamilton, Montana, the average relative humidity in May is 71%.

How many days does it rain in May in Hamilton?

In May, in Hamilton, Montana, the rain falls for 19.5 days. Throughout May, 1.97" (50mm) of precipitation is accumulated.

What is the last month it snows in Hamilton?

May is the last month it regularly snows. During 2.3 snowfall days, in May, Hamilton aggregates 0.67" (17mm) of snow.

How many hours of daylight does Hamilton have in May?

In Hamilton, the average day length in May is 15h and 1min.

When is the sunrise / sunset in May in Hamilton?

In May, on the first day of the month, sunrise is at 6:22 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 9:20 pm MDT.

How long on average sun shines in May in Hamilton?

The average sunshine duration in May in Hamilton is 10.4h.

What is the UV index intensity in May in Hamilton?

In May, the average daily maximum UV index in Hamilton, Montana, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Hamilton, MT

Average temperature in May - Hamilton, MT
  • Average high temperature in May: 56.7°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).

  • Average low temperature in May: 33.4°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).

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Average pressure in May
Hamilton, MT

Average pressure in May - Hamilton, MT
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Hamilton, MT

Average wind speed in May - Hamilton, MT
  • Average wind speed in May: 4.5mph

The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

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Average humidity in May
Hamilton, MT

Average humidity in May - Hamilton, MT
  • Average humidity in May: 71%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in May
Hamilton, MT

Average rainfall in May - Hamilton, MT
  • Average rainfall in May: 1.97"

The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").

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Average rainfall days in May
Hamilton, MT

Average rainfall days in May - Hamilton, MT
  • Average rainfall days in May: 19.5 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).

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Average snowfall in May
Hamilton, MT

Average snowfall in May - Hamilton, MT
  • Average snowfall in May: 0.67"

The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Hamilton, MT

Average snowfall days in May - Hamilton, MT
  • Average snowfall days in May: 2.3 days

The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in May / Average sunshine in May - Hamilton, MT
  • Average daylight in May: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 44min).
The month with the shortest days is December (Average daylight: 8h and 41min).

  • Average sunshine in May: 10h and 24min

The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

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Average sunshine days in May
Hamilton, MT

Average sunshine days in May - Hamilton, MT
  • Average sunshine days in May: 8.5 days

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).

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Average UV index in May
Hamilton, MT

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

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in May
Hamilton, MT

Average cloud cover in May - Hamilton, MT
  • Average cloud cover in May: 33

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in May
Hamilton, MT

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

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

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