Climate and monthly weather forecast
Shell, WY

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Weather in January

January, like December, is another subzero cold winter month in Shell, Wyoming, with an average temperature varying between 4.5°F (-15.3°C) and 22.8°F (-5.1°C). The arrival of January sees a recorded average high-temperature of a still freezing cold 22.8°F (-5.1°C), showing little divergence from the previous month's conditions. Weather in January »

Weather in February

February, the last month of the winter in Shell, is also a subzero cold month, with an average temperature varying between 22.1°F (-5.5°C) and 4.3°F (-15.4°C). With the transition into February, Shell notes an average high-temperature of a still subzero cold 22.1°F (-5.5°C), closely resembling January. Weather in February »

Weather in March

The first month of the spring, March, is also a subzero cold month in Shell, Wyoming, with an average temperature fluctuating between 30.6°F (-0.8°C) and 13.8°F (-10.1°C). The beginning of March marks a minor shift in the average high-temperature, moving from February's 22.1°F (-5.5°C) to a still freezing cold 30.6°F (-0.8°C). Weather in March »

Weather in April

April in Shell, Wyoming, is a wintry spring month, with an average temperature varying between 20.3°F (-6.5°C) and 36.9°F (2.7°C). April's onset brings a minor rise in the average high-temperature, moving from a subzero cold 30.6°F (-0.8°C) in March to an icy 36.9°F (2.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a chilly month in Shell, Wyoming, with an average temperature ranging between max 47.8°F (8.8°C) and min 31.1°F (-0.5°C). The arrival of May brings an increase in high-temperatures, moving from an icy 36.9°F (2.7°C) in April to a frosty 47.8°F (8.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a comfortable month in Shell, Wyoming, with an average temperature ranging between min 42.4°F (5.8°C) and max 61°F (16.1°C). With the arrival of June, the average high-temperature transitions from a chilly 47.8°F (8.8°C) in May to a comfortable 61°F (16.1°C). Weather in June »

Weather in July

July is an agreeable summer month in Shell, Wyoming, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 48.7°F (9.3°C). The warmest period is July, when temperatures fluctuate between an average high of 69.4°F (20.8°C) and a low of 48.7°F (9.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another refreshing month in Shell, Wyoming, with an average temperature fluctuating between 67.5°F (19.7°C) and 47.5°F (8.6°C). An average high-temperature of a refreshing 67.5°F (19.7°C) marks August, exhibiting a close resemblance to the conditions in July. Weather in August »

Weather in September

The first month of the autumn, September, is still a mild month in Shell, Wyoming, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 40.5°F (4.7°C). September signifies a minor drop in average high-temperature, transitioning from 67.5°F (19.7°C) in August to a still refreshing 59.7°F (15.4°C). Weather in September »

Weather in October

October, like September, in Shell, Wyoming, is an icy autumn month, with temperature in the range of an average high of 41.4°F (5.2°C) and an average low of 26.4°F (-3.1°C). In October, the average high-temperature decreases considerably from a mild 59.7°F (15.4°C) in September to a wintry 41.4°F (5.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Shell, is another freezing cold month, with an average temperature ranging between max 29.7°F (-1.3°C) and min 14.4°F (-9.8°C). November's onset brings a slight change in high-temperatures, falling from a wintry 41.4°F (5.2°C) in October to a subzero cold 29.7°F (-1.3°C). Weather in November »

Weather in December

December, the first month of the winter in Shell, is also a subzero cold month, with temperature in the range of an average high of 20.8°F (-6.2°C) and an average low of 2.3°F (-16.5°C). December brings the lowest temperatures, with an average high of 20.8°F (-6.2°C) and an average low of 2.3°F (-16.5°C). Weather in December »
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How much does it rain?

Throughout the year, there are 94.3 rainfall days, and 19.13" (486mm) of precipitation is accumulated.

When does it snow?

Months with snowfall are January through June, August through December.

How many days does it snow?

Throughout the year, in Shell, Wyoming, there are 113.3 snowfall days, and 89.02" (2261mm) of snow is accumulated.

When is the lowest UV index?

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2.

What is the most humid month?

February is the most humid month, with an average relative humidity of 85%.

What is the month with the least sunshine?

February has the least sunshine of the year, with an average of 4.8h of sunshine.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

What is the wettest month?

May is the month with the most rainfall. Rain falls for 9.5 days and accumulates 3.62" (92mm) of precipitation.

When does it snow the most?

May is the month with the most snowfall. Snow falls for 12.3 days and accumulates 19.33" (491mm) of snow.

When are the longest days?

The month with the longest days in Shell is June, with an average of 15h and 30min of daylight.

What is the hottest time of year?

In Shell, July is the month with the highest recorded average temperatures, measuring a high of 69.4°F (20.8°C) and a low of 48.7°F (9.3°C).

When it does not snow?

The only month without snowfall is July.

What month has the most sunshine?

July has the most sunshine of the year, with an average of 11.7h of sunshine.

What is the month with the highest UV index?

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

What is the least humid month?

August is the least humid month in Shell, with an average relative humidity of 51%.

What are the coldest months?

December is the coldest month, with an average high-temperature of 20.8°F (-6.2°C) and an average low-temperature of 2.3°F (-16.5°C).

What is the driest month?

December is the month with the least rainfall. Rain falls for 4 days and accumulates 0.75" (19mm) of precipitation.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

Average temperature
Shell, WY

Average temperature - Shell, WY

The warmest month (with the highest average high temperature) is July (69.4°F).
The month with the lowest average high temperature is December (20.8°F).

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (2.3°F).

Average pressure
Shell, WY

Average pressure - Shell, WY

The months with the highest atmospheric pressure are January and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed
Shell, WY

Average wind speed - Shell, WY

The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity
Shell, WY

Average humidity - Shell, WY

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (51%).

Average rainfall
Shell, WY

Average rainfall - Shell, WY

The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is December (0.75").

Average rainfall days
Shell, WY

Average rainfall days - Shell, WY

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is November (2.3 days).

Average snowfall days
Shell, WY

Average snowfall days - Shell, WY

The month with the highest number of snowfall days is January (15.8 days).
The month with the least snowfall days is July (0 days).

Average daylight / Average sunshine
Shell, WY

Average daylight / Average sunshine - Shell, WY

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).

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days
Shell, WY

Average sunshine days - Shell, WY

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (8.6 days).

Average UV index
Shell, WY

Average UV index - Shell, WY

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 2).

Average visibility
Shell, WY

Average visibility - Shell, WY

The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).

Shell, Wyoming, USA

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