Climate and monthly weather forecast
Riverton, WY

Weather in January

January, like December, is another subzero cold winter month in Riverton, Wyoming, with an average temperature varying between 14.5°F (-9.7°C) and 31.5°F (-0.3°C). In January, the average high-temperature is practically the same as in December - a still subzero cold 31.5°F (-0.3°C). Weather in January »

Weather in February

February, the last month of the winter in Riverton, is a cold month, with an average temperature ranging between max 32.9°F (0.5°C) and min 15.3°F (-9.3°C). In February, the average high-temperature is relatively the same as in January - a wintry 32.9°F (0.5°C). Weather in February »

Weather in March

March, the first month of the spring in Riverton, is a chilly month, with an average temperature ranging between min 27.9°F (-2.3°C) and max 46°F (7.8°C). In Riverton, the average high-temperature in March increases from a wintry 32.9°F (0.5°C) in February to a chilly 46°F (7.8°C). Weather in March »

Weather in April

April is a fresh spring month in Riverton, Wyoming, with an average temperature varying between 54.1°F (12.3°C) and 35.2°F (1.8°C). In Riverton, the average high-temperature in April slightly increases from a frosty 46°F (7.8°C) in March to a cool 54.1°F (12.3°C). Weather in April »

Weather in May

May, the last month of the spring in Riverton, is a comfortable month, with an average temperature fluctuating between 44.1°F (6.7°C) and 64.8°F (18.2°C). In Riverton, the average high-temperature in May rises from a cool 54.1°F (12.3°C) in April to a comfortable 64.8°F (18.2°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Riverton, Wyoming, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 54.7°F (12.6°C). In June, the average high-temperature soars, from an enjoyable 64.8°F (18.2°C) in May, to a moderately hot 79.3°F (26.3°C). Weather in June »

Weather in July

July is a tropical summer month in Riverton, Wyoming, with an average temperature varying between 61.5°F (16.4°C) and 87.1°F (30.6°C). July is the warmest month, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 61.5°F (16.4°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Riverton, Wyoming, with an average temperature ranging between min 60.3°F (15.7°C) and max 84.9°F (29.4°C). In August, the average high-temperature is practically the same as in July - a warm 84.9°F (29.4°C). Weather in August »

Weather in September

September, the first month of the autumn in Riverton, is still a warm month, with an average temperature ranging between max 75.6°F (24.2°C) and min 52.9°F (11.6°C). In September, the average high-temperature drops from a warm 84.9°F (29.4°C) in August to a still moderately hot 75.6°F (24.2°C). Weather in September »

Weather in October

October, the same as September, in Riverton, Wyoming, is another mild autumn month, with an average temperature varying between 38.3°F (3.5°C) and 57.7°F (14.3°C). In October, the average high-temperature declines considerably from a warm 75.6°F (24.2°C) in September to a mild 57.7°F (14.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Riverton, Wyoming, with temperature in the range of an average high of 45°F (7.2°C) and an average low of 26.4°F (-3.1°C). In November, the average high-temperature decreases from a mild 57.7°F (14.3°C) in October to a chilly 45°F (7.2°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Riverton, Wyoming, with an average temperature varying between 30.9°F (-0.6°C) and 14.7°F (-9.6°C). December is the coldest month, with an average high-temperature of 30.9°F (-0.6°C) and an average low-temperature of 14.7°F (-9.6°C). Weather in December »
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FAQ

What is the most humid month in Riverton?

The most humid month is January, with an average relative humidity of 77%.

What is the driest month in Riverton?

January is the month with the least rainfall in Riverton. Rain falls for 2.5 days and accumulates 0.24" (6mm) of precipitation.

How many days does it rain in Riverton?

In Riverton, during the entire year, the rain falls for 67.3 days and collects up to 6.93" (176mm) of precipitation.

When does it snow in Riverton?

Months with snowfall are January through May, September through December.

How much does it snow in Riverton?

Throughout the year, there are 42.8 snowfall days, and 25.47" (647mm) of snow is accumulated.

What is the month with the least sunshine in Riverton?

With an average of 6.6h of sunshine, January has the least sunshine of the year in Riverton.

What are the months with the lowest UV index in Riverton?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

When is Daylight Saving Time (DST) in Riverton?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Riverton, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

What is the snowiest month in Riverton?

April is the month with the most snowfall in Riverton. Snow falls for 5.7 days and accumulates 5.39" (137mm) of snow.

What is the rainiest month in Riverton?

The month with the most rainfall is May, when the rain falls for 9.9 days and typically aggregates up to 1.42" (36mm) of precipitation.

When it does not snow in Riverton?

June through August are months without snowfall.

When are the longest days in Riverton?

With an average of 15h and 19min of daylight, June has the longest days of the year in Riverton, Wyoming.

What is the warmest month in Riverton?

July is the warmest month, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 61.5°F (16.4°C).

What are the least humid months in Riverton?

The months with the lowest humidity are July and August, with an average relative humidity of 31%.

What month has the most sunshine in Riverton?

With an average of 12h of sunshine, July has the most sunshine of the year.

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

The month with the highest UV index is July, with an average maximum UV index of 7.

What is the coldest month in Riverton?

December is the coldest month, with an average high-temperature of 30.9°F (-0.6°C) and an average low-temperature of 14.7°F (-9.6°C).

What is the month with the shortest days in Riverton?

With an average of 9h and 4min of daylight, December has the shortest days of the year in Riverton.

Average temperature
Riverton, WY

Average temperature - Riverton, WY

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (30.9°F).

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).

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Average pressure
Riverton, WY

Average pressure - Riverton, WY

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed
Riverton, WY

Average wind speed - Riverton, WY

The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (5.5mph).

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Average humidity
Riverton, WY

Average humidity - Riverton, WY

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are July and August (31%).

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Average rainfall
Riverton, WY

Average rainfall - Riverton, WY

The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is January (0.24").

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Average rainfall days
Riverton, WY

Average rainfall days - Riverton, WY

The month with the highest number of rainy days is May (9.9 days).
The month with the least rainy days is January (2.5 days).

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Average snowfall
Riverton, WY

Average snowfall - Riverton, WY

The month with the highest snowfall is April (5.39").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Riverton, WY

Average snowfall days - Riverton, WY

The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight / Average sunshine
Riverton, WY

Average daylight / Average sunshine - Riverton, WY

The month with the longest days is June (Average daylight: 15h and 19min).
The month with the shortest days is December (Average daylight: 9h and 4min).

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 36min).

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Average sunshine days
Riverton, WY

Average sunshine days - Riverton, WY

The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (15.5 days).

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Average UV index
Riverton, WY

Average UV index - Riverton, WY

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

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Average visibility
Riverton, WY

Average visibility - Riverton, WY

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

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