Climate and monthly weather forecast
Thermopolis, WY

Weather in January

January, like December, is another subzero cold winter month in Thermopolis, Wyoming, with an average temperature ranging between max 28.9°F (-1.7°C) and min 12.6°F (-10.8°C). In Thermopolis, the average high-temperature in January is relatively the same as in December - a still freezing cold 28.9°F (-1.7°C). Weather in January »

Weather in February

February, the last month of the winter in Thermopolis, is also a subzero cold month, with an average temperature ranging between min 13.1°F (-10.5°C) and max 29.8°F (-1.2°C). In February, the average high-temperature is essentially the same as in January - a still freezing cold 29.8°F (-1.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Thermopolis, Wyoming, with an average temperature fluctuating between 44.1°F (6.7°C) and 27°F (-2.8°C). In March, the average high-temperature increases from a subzero cold 29.8°F (-1.2°C) in February to a frosty 44.1°F (6.7°C). Weather in March »

Weather in April

April in Thermopolis, Wyoming, is a cool spring month, with temperature in the range of an average high of 52.9°F (11.6°C) and an average low of 33.8°F (1°C). In April, the average high-temperature slightly increases from a chilly 44.1°F (6.7°C) in March to a fresh 52.9°F (11.6°C). Weather in April »

Weather in May

May, the last month of the spring in Thermopolis, is an enjoyable month, with an average temperature fluctuating between 43.3°F (6.3°C) and 63.5°F (17.5°C). In Thermopolis, Wyoming, the average high-temperature in May rises from a fresh 52.9°F (11.6°C) in April to an enjoyable 63.5°F (17.5°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Thermopolis, Wyoming, with an average temperature fluctuating between 76.5°F (24.7°C) and 54.1°F (12.3°C). In Thermopolis, the average high-temperature in June increases from a comfortable 63.5°F (17.5°C) in May to a moderately hot 76.5°F (24.7°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Thermopolis, Wyoming, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 84.9°F (29.4°C). With an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 61.3°F (16.3°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Thermopolis, Wyoming, with an average temperature fluctuating between 81.9°F (27.7°C) and 60.3°F (15.7°C). In August, the average high-temperature is relatively the same as in July - a still moderately hot 81.9°F (27.7°C). Weather in August »

Weather in September

September, the first month of the autumn in Thermopolis, is still a pleasant month, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 52°F (11.1°C). In September, the average high-temperature slightly decreases from a warm 81.9°F (27.7°C) in August to a pleasant 73°F (22.8°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Thermopolis, Wyoming, with an average temperature fluctuating between 54.9°F (12.7°C) and 37°F (2.8°C). In October, the average high-temperature declines considerably from an agreeable 73°F (22.8°C) in September to a fresh 54.9°F (12.7°C). Weather in October »

Weather in November

November, the last month of the autumn in Thermopolis, is another cold month, with an average temperature varying between 24.6°F (-4.1°C) and 41.2°F (5.1°C). In Thermopolis, Wyoming, the average high-temperature in November drops from a fresh 54.9°F (12.7°C) in October to a cold 41.2°F (5.1°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Thermopolis, Wyoming, with an average temperature varying between 12.9°F (-10.6°C) and 28.2°F (-2.1°C). December is the coldest month, with an average high-temperature of 28.2°F (-2.1°C) and an average low-temperature of 12.9°F (-10.6°C). Weather in December »
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FAQ

What is the most humid month in Thermopolis?

January is the most humid month in Thermopolis, Wyoming, with an average relative humidity of 81%.

What is the driest month in Thermopolis?

The month with the least rainfall in Thermopolis, Wyoming, is January, when the rain falls for 4.3 days and typically collects 0.43" (11mm) of precipitation.

How much does it rain in Thermopolis?

Throughout the year, there are 117.2 rainfall days, and 11.14" (283mm) of precipitation is accumulated.

When does it snow in Thermopolis?

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

How much does it snow in Thermopolis?

In Thermopolis, Wyoming, during the entire year, snow falls for 51.2 days and aggregates up to 21.3" (541mm) of snow.

When is the lowest UV index in Thermopolis?

The months with the lowest UV index in Thermopolis, Wyoming, are January through April, November and December, with an average maximum UV index of 2.

What is the snowiest month in Thermopolis?

The month with the most snowfall is February, when snow falls for 11.1 days and typically aggregates up to 4.57" (116mm) of snow.

What is the month with the least sunshine in Thermopolis?

With an average of 6.2h of sunshine, February has the least sunshine of the year in Thermopolis.

When is Daylight Saving Time (DST) in Thermopolis?

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.

What is the rainiest month in Thermopolis?

The month with the most rainfall in Thermopolis is May, when the rain falls for 17 days and typically aggregates up to 1.93" (49mm) of precipitation.

When it does not snow in Thermopolis?

June through August are months without snowfall in Thermopolis, Wyoming.

When are the longest days in Thermopolis?

With an average of 15h and 23min of daylight, June has the longest days of the year in Thermopolis, Wyoming.

What is the warmest month in Thermopolis?

The warmest month is July, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 61.3°F (16.3°C).

What is the least humid month in Thermopolis?

The months with the lowest humidity in Thermopolis are July and August, with an average relative humidity of 35%.

What month has the most sunshine in Thermopolis?

July has the most sunshine of the year, with an average of 11.9h of sunshine.

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

With an average maximum UV index of 6, July is the month with the highest UV index in Thermopolis.

What is the coldest month in Thermopolis?

The coldest month in Thermopolis, Wyoming, is December, with an average high-temperature of 28.2°F (-2.1°C) and an average low-temperature of 12.9°F (-10.6°C).

What is the month with the shortest days in Thermopolis?

With an average of 9h and 0min of daylight, December has the shortest days of the year in Thermopolis.

Average temperature
Thermopolis, WY

Average temperature - Thermopolis, WY

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (28.2°F).

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

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Average pressure
Thermopolis, WY

Average pressure - Thermopolis, WY

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed
Thermopolis, WY

Average wind speed - Thermopolis, WY

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (5mph).

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Average humidity
Thermopolis, WY

Average humidity - Thermopolis, WY

The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (35%).

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Average rainfall
Thermopolis, WY

Average rainfall - Thermopolis, WY

The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days
Thermopolis, WY

Average rainfall days - Thermopolis, WY

The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and December (4.3 days).

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Average snowfall
Thermopolis, WY

Average snowfall - Thermopolis, WY

The month with the highest snowfall is February (4.57").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Thermopolis, WY

Average snowfall days - Thermopolis, WY

The month with the highest number of snowfall days is February (11.1 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Thermopolis, WY

Average daylight / Average sunshine - Thermopolis, WY

The month with the longest days is June (Average daylight: 15h and 23min).
The month with the shortest days is December (Average daylight: 9h and 0min).

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).

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Average sunshine days
Thermopolis, WY

Average sunshine days - Thermopolis, WY

The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is May (10.1 days).

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Average UV index
Thermopolis, WY

Average UV index - Thermopolis, WY

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).

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Average visibility
Thermopolis, WY

Average visibility - Thermopolis, WY

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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