Riverton
Wyoming, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Riverton, WY

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

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

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

April is a cool spring month in Riverton, Wyoming, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 54.1°F (12.3°C). In Riverton, the average high-temperature marginally rises, from a frosty 46°F (7.8°C) in March, to a cool 54.1°F (12.3°C). Weather in April »

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

June, the first month of the summer, in Riverton, is a moderately hot month, with average temperature varying between 79.3°F (26.3°C) and 54.7°F (12.6°C). In June, the average high-temperature increases considerably, from a comfortable 64.8°F (18.2°C) in May, to a warm 79.3°F (26.3°C). Weather in June »

July in Riverton, Wyoming, is a tropical summer month, with average temperature varying between 87.1°F (30.6°C) and 61.5°F (16.4°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 »

The last month of the summer, August, is also a moderately hot month in Riverton, Wyoming, with temperature in the range of an average low of 60.3°F (15.7°C) and an average high of 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 »

The first month of the autumn, September, is also a moderately hot month in Riverton, Wyoming, with average temperature varying between 52.9°F (11.6°C) and 75.6°F (24.2°C). In September, the average high-temperature decreases, 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 »

October, the same as September, in Riverton, Wyoming, is another mild autumn month, with average temperature fluctuating between 38.3°F (3.5°C) and 57.7°F (14.3°C). In Riverton, Wyoming, the average high-temperature plummets, from a moderately hot 75.6°F (24.2°C) in September, to a moderate 57.7°F (14.3°C). Weather in October »

November, the last month of the autumn, in Riverton, is another chilly month, with average temperature fluctuating between 45°F (7.2°C) and 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 »

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

What is the most humid month in Riverton?

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

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.

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.

When does it snow in Riverton?

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

How many days 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?

The month with the least sunshine in Riverton is January, with an average of 6.6h of sunshine.

When is the lowest UV index in Riverton?

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

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?

May is the month with the most rainfall in Riverton, Wyoming. Rain falls for 9.9 days and accumulates 1.42" (36mm) of precipitation.

When it does not snow in Riverton?

In Riverton, Wyoming, snow does not fall in June through August.

When are the longest days in Riverton?

The month with the longest days is June, with an average of 15.3h of daylight.

What is the warmest month in Riverton?

The warmest month in Riverton 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?

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

What month has the most sunshine in Riverton?

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

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

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

What is the coldest month in Riverton?

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 in Riverton, Wyoming.

What is the month with the shortest days in Riverton?

December has the shortest days of the year, with an average of 9.1h of daylight.
Average temperature - Riverton, WY
Average humidity - Riverton, WY
Average rainfall - Riverton, WY

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

Average rainfall days - Riverton, WY

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

Average snowfall - Riverton, WY
Average snowfall days - Riverton, WY

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

Average daylight / Average sunshine - Riverton, WY