May weather forecast
Tattnall, MT

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Weather in May

The last month of the spring, May, is a comfortable month in Tattnall, Montana, with an average temperature fluctuating between 46.9°F (8.3°C) and 65.8°F (18.8°C).

Temperature

May signals a shift in the average high-temperature, moving from April's fresh 53.1°F (11.7°C) to a refreshing 65.8°F (18.8°C). During May, the temperature is averaged to a low of 46.9°F (8.3°C) at night.

Humidity

In Tattnall, the average relative humidity in May is 52%.

Rainfall

May is the month with the most rainfall. Rain falls for 12.7 days and accumulates 1.73" (44mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Tattnall aggregates 0.31" (8mm) of snow. In Tattnall, during the entire year, snow falls for 56.9 days and aggregates up to 17.95" (456mm) of snow.

Daylight

In Tattnall, the average length of the day in May is 15h and 17min.
On the first day of the month, sunrise is at 5:48 am and sunset at 8:25 pm. On the last day of May, sunrise is at 5:12 am and sunset at 9:03 pm MDT.

Sunshine

The average sunshine in May in Tattnall is 10h.

UV index

In May, the average daily maximum UV index in Tattnall is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the UV index of 5 transforms into the following advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are the temperatures in Tattnall in May?

In May, the average high-temperature and low-temperature are 65.8°F (18.8°C) and 46.9°F (8.3°C) respectively.

What is the average humidity in May in Tattnall?

In Tattnall, the average relative humidity in May is 52%.

What is the wettest month in Tattnall?

May is the month with the most rainfall in Tattnall, Montana. Rain falls for 12.7 days and accumulates 1.73" (44mm) of precipitation.

How many days does it rain in May in Tattnall?

In Tattnall, Montana, in May, during 12.7 rainfall days, 1.73" (44mm) of precipitation is typically accumulated.

What is the last month it snows in Tattnall?

May is the last month it regularly snows. During 0.3 snowfall days, in May, Tattnall aggregates 0.31" (8mm) of snow.

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

The average day length in May is 15h and 17min.

When is the sunrise / sunset in May in Tattnall?

On the first day of May in Tattnall, sunrise is at 5:48 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 9:03 pm MDT.

How many hours of sunshine does Tattnall have in May?

In Tattnall, the average sunshine duration in May is 10h.

What is the UV index reading in May in Tattnall?

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

Average temperature in May - Tattnall, MT
  • Average high temperature in May: 65.8°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is February (24.4°F).

  • Average low temperature in May: 46.9°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is February (10°F).

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Average pressure in May
Tattnall, MT

Average pressure in May - Tattnall, MT
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in May
Tattnall, MT

Average wind speed in May - Tattnall, MT
  • Average wind speed in May: 10.6mph

The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is February (8.3mph).

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Average humidity in May
Tattnall, MT

Average humidity in May - Tattnall, MT
  • Average humidity in May: 52%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in May
Tattnall, MT

Average rainfall in May - Tattnall, MT
  • Average rainfall in May: 1.73"

The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is February (0.43").

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Average rainfall days in May
Tattnall, MT

Average rainfall days in May - Tattnall, MT
  • Average rainfall days in May: 12.7 days

The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in May
Tattnall, MT

Average snowfall in May - Tattnall, MT
  • Average snowfall in May: 0.31"

The month with the highest snowfall is December (3.43").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Tattnall, MT

Average snowfall days in May - Tattnall, MT
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is January (12.3 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
Tattnall, MT

Average daylight in May / Average sunshine in May - Tattnall, MT
  • Average daylight in May: 15h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in May: 10h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in May
Tattnall, MT

Average sunshine days in May - Tattnall, MT
  • Average sunshine days in May: 16.3 days

The month with the most sunshine days is October (21 days).
The month with the least sunshine days is April (15.4 days).

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Average UV index in May
Tattnall, MT

Average UV index in May - Tattnall, MT
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in May
Tattnall, MT

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

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 18).

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Average visibility in May
Tattnall, MT

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

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

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Tattnall, Montana, USA

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