Monthly weather forecast and climate
Riverside, MT

Weather in January

January, like December, is another subzero cold winter month in Riverside, Montana, with average temperature varying between 6.1°F (-14.4°C) and 21.9°F (-5.6°C). In January, the average high-temperature is almost the same as in December - a still subzero cold 21.9°F (-5.6°C). Weather in January »

Weather in February

February, the last month of the winter, in Riverside, is also a subzero cold month, with average temperature fluctuating between 7.2°F (-13.8°C) and 23°F (-5°C). In Riverside, the average high-temperature is essentially the same as in January - a still subzero cold 23°F (-5°C). Weather in February »

Weather in March

March, the first month of the spring, in Riverside, is also a subzero cold month, with temperature in the range of an average low of 14.4°F (-9.8°C) and an average high of 30°F (-1.1°C). In Riverside, the average high-temperature in March marginally rises, from a subzero cold 23°F (-5°C) in February, to a still freezing cold 30°F (-1.1°C). Weather in March »

Weather in April

April is a cold spring month in Riverside, Montana, with average temperature ranging between min 19.6°F (-6.9°C) and max 37.2°F (2.9°C). In Riverside, the average high-temperature slightly increases, from a freezing cold 30°F (-1.1°C) in March, to a cold 37.2°F (2.9°C). Weather in April »

Weather in May

The last month of the spring, May, is a chilly month in Riverside, Montana, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 49.8°F (9.9°C). In May, the average high-temperature rises, from a cold 37.2°F (2.9°C) in April, to a chilly 49.8°F (9.9°C). Weather in May »

Weather in June

The first month of the summer, June, is an enjoyable month in Riverside, Montana, with average temperature fluctuating between 37°F (2.8°C) and 61.9°F (16.6°C). In June, the average high-temperature increases, from a frosty 49.8°F (9.9°C) in May, to an enjoyable 61.9°F (16.6°C). Weather in June »

Weather in July

July is an agreeable summer month in Riverside, Montana, with temperature in the range of an average low of 43.5°F (6.4°C) and an average high of 72.9°F (22.7°C). With an average high-temperature of 72.9°F (22.7°C) and an average low-temperature of 43.5°F (6.4°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer, in Riverside, is another pleasant month, with average temperature fluctuating between 43.7°F (6.5°C) and 71.4°F (21.9°C). In August, the average high-temperature is essentially the same as in July - a still pleasant 71.4°F (21.9°C). Weather in August »

Weather in September

September, the first month of the autumn, in Riverside, is still a comfortable month, with average temperature ranging between min 37.6°F (3.1°C) and max 61.9°F (16.6°C). In September, the average high-temperature decreases, from an agreeable 71.4°F (21.9°C) in August, to an enjoyable 61.9°F (16.6°C). Weather in September »

Weather in October

October, the same as September, in Riverside, Montana, is another chilly autumn month, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 26.1°F (-3.3°C). In October, the average high-temperature plummets, from an enjoyable 61.9°F (16.6°C) in September, to a chilly 44.2°F (6.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is another freezing cold month in Riverside, Montana, with average temperature ranging between min 14.2°F (-9.9°C) and max 29.7°F (-1.3°C). In Riverside, the average high-temperature plummets, from a chilly 44.2°F (6.8°C) in October, to a freezing cold 29.7°F (-1.3°C). Weather in November »

Weather in December

December, the first month of the winter, in Riverside, is still a freezing cold month, with average temperature ranging between max 20.1°F (-6.6°C) and min 4.8°F (-15.1°C). With an average high-temperature of 20.1°F (-6.6°C) and an average low-temperature of 4.8°F (-15.1°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Riverside?

In Riverside, Montana, during the entire year, the rain falls for 109.2 days and collects up to 23.15" (588mm) of precipitation.

When does it snow in Riverside?

January through July, September through December are months with snowfall.

How much does it snow in Riverside?

Throughout the year, in Riverside, Montana, there are 159.3 snowfall days, and 120.47" (3060mm) of snow is accumulated.

What is the month with the least sunshine in Riverside?

Months with the least sunshine in Riverside are January, February and December, with an average of 3.3h of sunshine.

When is the lowest UV index in Riverside?

Months with the lowest UV index in Riverside, Montana, are January through April, October through December, with an average maximum UV index of 1.

What is the most humid month in Riverside?

The most humid month is February, with an average relative humidity of 95%.

What is the snowiest month in Riverside?

The month with the most snowfall in Riverside, Montana, is February when snow falls for 23.2 days and typically aggregates up to 17.83" (453mm) of snow.

What is the rainiest month in Riverside?

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

When are the longest days in Riverside?

With an average of 15.5h of daylight, June has the longest days of the year in Riverside.

What is the warmest month in Riverside?

With an average high-temperature of 72.9°F (22.7°C) and an average low-temperature of 43.5°F (6.4°C), July is the warmest month in Riverside, Montana.

What is the driest month in Riverside?

The month with the least rainfall in Riverside, Montana, is July when the rain falls for 11.9 days and typically collects 0.91" (23mm) of precipitation.

What month has the most sunshine in Riverside?

July has the most sunshine of the year, with an average of 11.8h of sunshine.

What is the month with the highest UV index in Riverside?

July is the month with the highest UV index, with an average maximum UV index of 5.

What is the least humid month in Riverside?

August is the least humid month in Riverside, Montana, with an average relative humidity of 50%.

When it does not snow in Riverside?

August is the only month when snow does not fall in Riverside, Montana.

What is the coldest month in Riverside?

With an average high-temperature of 20.1°F (-6.6°C) and an average low-temperature of 4.8°F (-15.1°C), December is the coldest month in Riverside.

What is the month with the shortest days in Riverside?

The month with the shortest days in Riverside is December, with an average of 8.9h of daylight.

Average temperature
Riverside, MT

Average temperature - Riverside, MT

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).

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
Riverside, MT

Average pressure - Riverside, MT

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

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Average wind speed
Riverside, MT

Average wind speed - Riverside, MT

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 rainfall
Riverside, MT

Average rainfall - Riverside, MT

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
Riverside, MT

Average rainfall days - Riverside, MT

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
Riverside, MT

Average snowfall - Riverside, MT

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
Riverside, MT

Average snowfall days - Riverside, MT

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

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Average daylight / Average sunshine
Riverside, MT

Average daylight / Average sunshine - Riverside, MT

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

The month with the most sunshine is July (Average sunshine: 11.8h).
Months with the least sunshine are January, February and December (Average sunshine: 3.3).

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Average sunshine days
Riverside, MT

Average sunshine days - Riverside, MT

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
Riverside, MT

Average UV index - Riverside, MT

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

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Average visibility
Riverside, MT

Average visibility - Riverside, MT

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

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