May weather forecast
Jefferson City, MT

Weather in May

The last month of the spring, May, is a moderate month in Jefferson City, Montana, with temperature in the range of an average high of 58.5°F (14.7°C) and an average low of 35.2°F (1.8°C).

Temperature

In May, the average high-temperature rises from a chilly 46.4°F (8°C) in April to a mild 58.5°F (14.7°C). In May, in Jefferson City, the average low-temperature is 35.2°F (1.8°C).

Humidity

The average relative humidity in May in Jefferson City is 64%.

Rainfall

In Jefferson City, it is raining for 18.2 days, with typically 2.36" (60mm) of accumulated precipitation. Throughout the year, there are 133.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through June, September through December. In May, it is snowing for 4.4 days. Throughout May, 2.64" (67mm) of snow is accumulated. In Jefferson City, during the entire year, snow falls for 105.8 days and aggregates up to 55.12" (1400mm) of snow.

Daylight

In Jefferson City, the average length of the day in May is 15h and 1min.
On the first day of May, sunrise is at 6:13 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 9:12 pm MDT.

Sunshine

The average sunshine in May is 10.2h.

UV index

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 4 in May transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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 average humidity in May in Jefferson City?

In Jefferson City, the average relative humidity in May is 64%.

How many days does it rain in May in Jefferson City?

In Jefferson City, Montana, in May, during 18.2 rainfall days, 2.36" (60mm) of precipitation is typically accumulated.

How much does it snow in Jefferson City in May?

In Jefferson City, Montana, during May, snow falls for 4.4 days and regularly aggregates up to 2.64" (67mm) of snow.

How many hours of daylight does Jefferson City have in May?

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

What time are sunrise and sunset in May in Jefferson City?

On the first day of May in Jefferson City, Montana, sunrise is at 6:13 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 9:12 pm MDT.

How long on average sun shines in May in Jefferson City?

The average sunshine duration in May in Jefferson City is 10.2h.

How high is the UV index in May in Jefferson City?

The average daily maximum UV index in May in Jefferson City is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Jefferson City, MT

Average temperature in May - Jefferson City, MT
  • Average high temperature in May: 58.5°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 (27°F).

  • Average low temperature in May: 35.2°F

The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).

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Average pressure in May
Jefferson City, MT

Average pressure in May - Jefferson City, MT
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in May
Jefferson City, MT

Average wind speed in May - Jefferson City, MT
  • Average wind speed in May: 5.4mph

The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in May
Jefferson City, MT

Average humidity in May - Jefferson City, MT
  • Average humidity in May: 64%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in May
Jefferson City, MT

Average rainfall in May - Jefferson City, MT
  • Average rainfall in May: 2.36"

The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").

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Average rainfall days in May
Jefferson City, MT

Average rainfall days in May - Jefferson City, MT
  • Average rainfall days in May: 18.2 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).

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Average snowfall in May
Jefferson City, MT

Average snowfall in May - Jefferson City, MT
  • Average snowfall in May: 2.64"

The month with the highest snowfall is February (9.72").
The months with the least snowfall are July and August (0").

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Average snowfall days in May
Jefferson City, MT

Average snowfall days in May - Jefferson City, MT
  • Average snowfall days in May: 4.4 days

The month with the highest number of snowfall days is February (18 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in May /
Average sunshine in May
Jefferson City, MT

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

The month with the longest days is June (Average daylight: 15h and 45min).
The month with the shortest days is December (Average daylight: 8h and 40min).

  • Average sunshine in May: 10h and 12min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).

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Average sunshine days in May
Jefferson City, MT

Average sunshine days in May - Jefferson City, MT
  • Average sunshine days in May: 9.3 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).

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Average UV index in May
Jefferson City, MT

Average UV index in May - Jefferson City, 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 February (UV index 1).

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Average cloud cover in May
Jefferson City, MT

Average cloud cover in May - Jefferson City, MT
  • Average cloud cover in May: 34

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in May
Jefferson City, MT

Average visibility in May - Jefferson City, MT
  • Average visibility in May: 6mi

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

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