May weather forecast and climate
Gallatin Gateway, MT

The last month of the spring, May, is a fresh month in Gallatin Gateway, Montana, with average temperature fluctuating between 33.4°F (0.8°C) and 55°F (12.8°C).

Temperature

In Gallatin Gateway, the average high-temperature increases, from a frosty 43°F (6.1°C) in April, to a cool 55°F (12.8°C). In May, the average low-temperature is 33.4°F (0.8°C).

Humidity

In Gallatin Gateway, Montana, the average relative humidity is 72%.

Rainfall

The month with the most rainfall in Gallatin Gateway is May when the rain falls for 18.5 days and typically aggregates up to 2.83" (72mm) of precipitation.

Snowfall

Months with snowfall are January through June, September through December. In Gallatin Gateway, during 5.7 snowfall days, 4.45" (113mm) of snow is typically accumulated. Throughout the year, there are 122.8 snowfall days, and 91.1" (2314mm) of snow is accumulated.

Daylight

The average length of the day is 14.9h.

Sunshine

In May, the average sunshine in Gallatin Gateway is 9.3h.

UV index

In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in May in Gallatin Gateway?

In May, in Gallatin Gateway, Montana, the average high-temperature is 55°F (12.8°C), and the average low-temperature is 33.4°F (0.8°C).

What is the average humidity in May in Gallatin Gateway?

In Gallatin Gateway, the average relative humidity in May is 72%.

How many days does it rain in May in Gallatin Gateway?

In Gallatin Gateway, during May, the rain falls for 18.5 days and regularly aggregates up to 2.83" (72mm) of precipitation.

What is the rainiest month in Gallatin Gateway?

May is the month with the most rainfall in Gallatin Gateway, Montana. Rain falls for 18.5 days and accumulates 2.83" (72mm) of precipitation.

How many days does it snow in May in Gallatin Gateway?

In May, in Gallatin Gateway, Montana, it is snowing for 5.7 days. Throughout May, 4.45" (113mm) of snow is accumulated.

How many hours of daylight does Gallatin Gateway have in May?

In Gallatin Gateway, Montana, the average length of the day in May is 14.9h.

How many hours of sunshine does Gallatin Gateway have in May?

The average sunshine in May in Gallatin Gateway, Montana, is 9.3h.

What is the UV index reading in May in Gallatin Gateway?

In May, the average daily maximum UV index in Gallatin Gateway, Montana, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in May - Gallatin Gateway, MT
  • Average high temperature in May: 12.8°C

The warmest month (with the highest average high temperature) is July (25°C).
The month with the lowest average high temperature is December (-4°C).

  • Average low temperature in May: 0.8°C

Months with the highest average low temperature are July and August (8.3°C).
The coldest month (with the lowest average low temperature) is December (-12°C).

Average pressure in May - Gallatin Gateway, MT
  • Average pressure in May: 1013.9mbar

The month with the highest atmospheric pressure is January (1022.4mbar).
The month with the lowest atmospheric pressure is June (1012.6mbar).

Average wind speed in May - Gallatin Gateway, MT
  • Average wind speed in May: 8.1km/h

The windiest month (with the highest average wind speed) is January (9.9km/h).
The calmest month (with the lowest average wind speed) is August (7.5km/h).

Average humidity in May - Gallatin Gateway, MT
  • Average humidity in May: 72%

The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is August (51%).

Average rainfall in May - Gallatin Gateway, MT
  • Average rainfall in May: 72mm

The wettest month (with the highest rainfall) is May (72mm).
The driest month (with the least rainfall) is August (33mm).

Average rainfall days in May - Gallatin Gateway, MT
  • Average rainfall days in May: 18.5 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (4.4 days).

Average snowfall in May - Gallatin Gateway, MT
  • Average snowfall in May: 113mm

The month with the highest snowfall is February (394mm).
Months with the least snowfall are July and August (0mm).

Average snowfall days in May - Gallatin Gateway, MT
  • Average snowfall days in May: 5.7 days

The month with the highest number of snowfall days is February (20.3 days).
The month with the least snowfall days is July (0 days).

Average daylight in May / Average sunshine in May - Gallatin Gateway, MT
  • Average daylight in May: 14.9h

The month with the longest days is June (Average daylight: 15.6h).
The month with the shortest days is December (Average daylight: 8.8h).

  • Average sunshine in May: 9.3h

The month with the most sunshine is July (Average sunshine: 11.5h).
Months with the least sunshine are January and February (Average sunshine: 4.5).

Average sunshine days in May - Gallatin Gateway, MT
  • Average sunshine days in May: 8.2 days

The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is April (7 days).

Average UV index in May - Gallatin Gateway, MT
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 1).

Average cloud cover in May - Gallatin Gateway, MT
  • Average cloud cover in May: 41

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 17).

Average visibility in May - Gallatin Gateway, MT
  • Average visibility in May: 8km

Months with the highest visibility are July and August (10km).
Months with the lowest visibility are January and February (6km).