May weather forecast
Riverside, MT

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Weather in May

May, the last month of the spring in Riverside, is a chilly month, with temperature in the range of an average high of 49.8°F (9.9°C) and an average low of 28.9°F (-1.7°C).

Temperature

As May arrives, a rise in the average high-temperature is observed, moving from an icy 37.2°F (2.9°C) in April to a chilly 49.8°F (9.9°C). The average temperature during May nights in Riverside is registered at a subzero cold 28.9°F (-1.7°C).

Humidity

In May, the average relative humidity in Riverside is 76%.

Rainfall

The month with the most rainfall is May, when the rain falls for 17.4 days and typically aggregates up to 2.8" (71mm) of precipitation.

Snowfall

January through July, September through December are months with snowfall in Riverside, Montana. In Riverside, Montana, during May, snow falls for 10.3 days and regularly aggregates up to 8.23" (209mm) of snow. Throughout the year, in Riverside, there are 159.3 snowfall days, and 120.47" (3060mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 50min.
On the first day of the month, sunrise is at 6:12 am and sunset at 8:29 pm. On the last day of May, in Riverside, sunrise is at 5:42 am and sunset at 9:02 pm MDT.

Sunshine

In Riverside, the average sunshine in May is 9.6h.

UV index

In Riverside, the average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index, 3 in May, converts into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

What are May temperatures in Riverside?

The high-temperature, in May, in Riverside, is 49.8°F (9.9°C), while the low-temperature averages to 28.9°F (-1.7°C).

What is the average humidity in May in Riverside?

The average relative humidity in May in Riverside is 76%.

What is the rainiest month in Riverside?

May is the month with the most rainfall in Riverside, Montana. Rain falls for 17.4 days and accumulates 2.8" (71mm) of precipitation.

How many days does it rain in May in Riverside?

In Riverside, Montana, in May, it is raining for 17.4 days, with typically 2.8" (71mm) of accumulated precipitation.

How many days does it snow in May in Riverside?

In Riverside, in May, snow falls for 10.3 days, with typically accumulated 8.23" (209mm) of snow.

How many hours of daylight does Riverside have in May?

In May, the average day length is 14h and 50min.

When is the sunrise / sunset in May in Riverside?

On the first day of May, sunrise is at 6:12 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 9:02 pm MDT.

How many hours of sunshine does Riverside have in May?

In May, the average sunshine duration in Riverside is 9.6h.

What is the UV index reading in May in Riverside?

In Riverside, the average daily maximum UV index in May is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
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
Riverside, MT

Average temperature in May - Riverside, MT
  • Average high temperature in May: 49.8°F

The warmest month (with the highest average high temperature) is July (72.9°F).
The month with the lowest average high temperature is December (20.1°F).

  • Average low temperature in May: 28.9°F

The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (4.8°F).

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Average pressure in May
Riverside, MT

Average pressure in May - Riverside, MT
  • Average pressure in May: 29.94"Hg

The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in May
Riverside, MT

Average wind speed in May - Riverside, MT
  • Average wind speed in May: 6mph

The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in May
Riverside, MT

Average humidity in May - Riverside, MT
  • Average humidity in May: 76%

The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in May
Riverside, MT

Average rainfall in May - Riverside, MT
  • Average rainfall in May: 2.8"

The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is July (0.91").

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Average rainfall days in May
Riverside, MT

Average rainfall days in May - Riverside, MT
  • Average rainfall days in May: 17.4 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (2.2 days).

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Average snowfall in May
Riverside, MT

Average snowfall in May - Riverside, MT
  • Average snowfall in May: 8.23"

The month with the highest snowfall is February (17.83").
The month with the least snowfall is August (0").

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Average snowfall days in May
Riverside, MT

Average snowfall days in May - Riverside, MT
  • Average snowfall days in May: 10.3 days

The month with the highest number of snowfall days is March (24.4 days).
The months with the least snowfall days are July and August (0.2 days).

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

Average daylight in May / Average sunshine in May - Riverside, MT
  • Average daylight in May: 14h and 5min

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

  • Average sunshine in May: 9h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 18min).

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Average sunshine days in May
Riverside, MT

Average sunshine days in May - Riverside, MT
  • Average sunshine days in May: 5.5 days

The months with the most sunshine days are July and September (14.7 days).
The month with the least sunshine days is February (5.3 days).

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Average UV index in May
Riverside, MT

Average UV index in May - Riverside, MT
  • Average UV index in May: 3

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

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Average cloud cover in May
Riverside, MT

Average cloud cover in May - Riverside, MT
  • Average cloud cover in May: 39

The month with the most cloud cover is February (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in May
Riverside, MT

Average visibility in May - Riverside, MT
  • Average visibility in May: 5mi

The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).

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Riverside, Montana, USA

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