May weather forecast
Saint Ignatius, MT

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Weather in May

The last month of the spring, May, is an enjoyable month in Saint Ignatius, Montana, with an average temperature ranging between min 36.7°F (2.6°C) and max 61°F (16.1°C).

Temperature

The start of May brings a rise in the average high-temperature, moving from a frosty 48.7°F (9.3°C) in April to a refreshing 61°F (16.1°C). A pronounced dip becomes evident during the nights in May as Saint Ignatius logs a consistent average temperature of 36.7°F (2.6°C).

Humidity

In Saint Ignatius, the average relative humidity in May is 67%.

Rainfall

In Saint Ignatius, in May, it is raining for 14.1 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, there are 129.9 rainfall days, and 13.5" (343mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. May is the last month it regularly snows in Saint Ignatius. During 0.3 snowfall days, in May, Saint Ignatius aggregates 0.08" (2mm) of snow. In Saint Ignatius, during the entire year, snow falls for 67.1 days and aggregates up to 28.27" (718mm) of snow.

Daylight

In May, the average length of the day is 15h and 8min.
On the first day of the month, sunrise is at 6:18 am and sunset at 8:48 pm. On the last day of May, sunrise is at 5:43 am and sunset at 9:24 pm MDT.

Sunshine

The average sunshine in May in Saint Ignatius is 10.5h.

UV index

In Saint Ignatius, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 4 during May translates into the following directions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
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Frequently asked questions

What is the usual temperature for Saint Ignatius in May?

In Saint Ignatius, 61°F (16.1°C) is the average high-temperature and 36.7°F (2.6°C) is the average low-temperature during May.

What is the average humidity in May in Saint Ignatius?

In May, the average relative humidity in Saint Ignatius is 67%.

How much does it rain in Saint Ignatius in May?

In Saint Ignatius, in May, during 14.1 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.

What is the last month it snows in Saint Ignatius?

May is the last month it regularly snows. During 0.3 snowfall days, in May, Saint Ignatius aggregates 0.08" (2mm) of snow.

What is the average length of the day in May in Saint Ignatius?

In Saint Ignatius, the average day length in May is 15h and 8min.

What time are sunrise and sunset in May in Saint Ignatius?

On the first day of May in Saint Ignatius, sunrise is at 6:18 am and sunset at 8:48 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 9:24 pm MDT.

How many hours of sunshine does Saint Ignatius have in May?

In May, the average sunshine duration in Saint Ignatius, Montana, is 10.5h.

How high is the UV index in May in Saint Ignatius?

In May, the average daily maximum UV index in Saint Ignatius, Montana, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health 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
Saint Ignatius, MT

Average temperature in May - Saint Ignatius, MT
  • Average high temperature in May: 61°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (28.4°F).

  • Average low temperature in May: 36.7°F

The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).

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Average pressure in May
Saint Ignatius, MT

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

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in May
Saint Ignatius, MT

Average wind speed in May - Saint Ignatius, MT
  • Average wind speed in May: 4.3mph

The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest months (with the lowest average wind speed) are January, August and December (3.9mph).

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Average humidity in May
Saint Ignatius, MT

Average humidity in May - Saint Ignatius, MT
  • Average humidity in May: 67%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in May
Saint Ignatius, MT

Average rainfall in May - Saint Ignatius, MT
  • Average rainfall in May: 1.26"

The wettest month (with the highest rainfall) is June (2.2").
The driest months (with the least rainfall) are July and August (0.63").

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Average rainfall days in May
Saint Ignatius, MT

Average rainfall days in May - Saint Ignatius, MT
  • Average rainfall days in May: 14.1 days

The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is August (7.4 days).

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Average snowfall in May
Saint Ignatius, MT

Average snowfall in May - Saint Ignatius, MT
  • Average snowfall in May: 0.08"

The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Saint Ignatius, MT

Average snowfall days in May - Saint Ignatius, MT
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is December (14.5 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
Saint Ignatius, MT

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

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in May: 10h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in May
Saint Ignatius, MT

Average sunshine days in May - Saint Ignatius, MT
  • Average sunshine days in May: 15.3 days

The month with the most sunshine days is July (20.8 days).
The month with the least sunshine days is February (11 days).

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Average UV index in May
Saint Ignatius, MT

Average UV index in May - Saint Ignatius, MT
  • Average UV index in May: 4

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

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Average cloud cover in May
Saint Ignatius, MT

Average cloud cover in May - Saint Ignatius, MT
  • Average cloud cover in May: 33

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 14).

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Average visibility in May
Saint Ignatius, MT

Average visibility in May - Saint Ignatius, MT
  • Average visibility in May: 6mi

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

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Saint Ignatius, Montana, USA

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