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 ranging between min 14.5°F (-9.7°C) and max 31.5°F (-0.3°C). In Riverton, the average high-temperature in January is almost the same as in December - a still subzero cold 31.5°F (-0.3°C). Weather in January »

Weather in February

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

Weather in March

March, the first month of the spring in Riverton, is a frosty month, with temperature in the range of an average low of 27.9°F (-2.3°C) and an average high of 46°F (7.8°C). In March, the average high-temperature increases from a cold 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 fluctuating between 35.2°F (1.8°C) and 54.1°F (12.3°C). In Riverton, the average high-temperature in April marginally rises 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

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

Weather in June

June, the first month of the summer in Riverton, is a moderately hot month, with an average temperature ranging between max 79.3°F (26.3°C) and min 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 in Riverton, Wyoming, is a tropical summer month, with an average temperature varying between 61.5°F (16.4°C) and 87.1°F (30.6°C). The warmest month is July, 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 another warm month in Riverton, Wyoming, with an average temperature varying between 84.9°F (29.4°C) and 60.3°F (15.7°C). In August, the average high-temperature is practically the same as in July - a moderately hot 84.9°F (29.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Riverton, Wyoming, with an average temperature fluctuating between 75.6°F (24.2°C) and 52.9°F (11.6°C). In Riverton, Wyoming, the average high-temperature in September drops from a moderately hot 84.9°F (29.4°C) in August to a still warm 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 fluctuating between 57.7°F (14.3°C) and 38.3°F (3.5°C). In October, the average high-temperature declines considerably from a moderately hot 75.6°F (24.2°C) in September to a moderate 57.7°F (14.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Riverton, is also a frosty month, with an average temperature ranging between max 45°F (7.2°C) and min 26.4°F (-3.1°C). In Riverton, the average high-temperature in November decreases from a mild 57.7°F (14.3°C) in October to a frosty 45°F (7.2°C). Weather in November »

Weather in December

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

What is the most humid month in Riverton?

With an average relative humidity of 77%, January is the most humid month in Riverton, Wyoming.

What is the driest month in Riverton?

The month with the least rainfall in Riverton, Wyoming, is January, when the rain falls for 2.5 days and typically collects 0.24" (6mm) of precipitation.

How much does it rain in Riverton?

Throughout the year, there are 67.3 rainfall days, and 6.93" (176mm) of precipitation is accumulated.

When does it snow in Riverton?

January through May, September through December are months with snowfall in Riverton.

How much does it snow in Riverton?

Throughout the year, in Riverton, Wyoming, 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.

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

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

When is Daylight Saving Time (DST) in Riverton?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, 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.

When does it snow the most in Riverton?

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

What is the rainiest month in Riverton?

May is the month with the most rainfall. Rain falls for 9.9 days and accumulates 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.

What is the warmest month in Riverton?

The warmest month is July, 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 is the least humid month 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?

The month with the most sunshine in Riverton is July, with an average of 12h of sunshine.

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

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

What is the coldest month in Riverton?

The coldest month is December, 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?

The month with the shortest days in Riverton, Wyoming, is December, with an average of 9h and 4min of daylight.

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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