Climate and monthly weather forecast
Hanna, WY

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Weather in January

January, the same as December, in Hanna, Wyoming, is a freezing cold winter month, with an average temperature ranging between max 27.5°F (-2.5°C) and min 13.3°F (-10.4°C). The arrival of January brings an average high-temperature of a still freezing cold 27.5°F (-2.5°C), closely following the temperature pattern of December. Weather in January »

Weather in February

February, the last month of the winter in Hanna, is also a subzero cold month, with an average temperature ranging between max 29.5°F (-1.4°C) and min 14.7°F (-9.6°C). As Hanna, Wyoming, welcomes February, the average high-temperature stabilizes at a still subzero cold 29.5°F (-1.4°C), showing little deviation from January's 27.5°F (-2.5°C). Weather in February »

Weather in March

The first month of the spring, March, is an icy month in Hanna, Wyoming, with an average temperature varying between 24.8°F (-4°C) and 40.6°F (4.8°C). With the beginning of March, Hanna's average high-temperature sees an increase, transitioning from a subzero cold 29.5°F (-1.4°C) in February to a wintry 40.6°F (4.8°C). Weather in March »

Weather in April

April in Hanna, Wyoming, is a chilly spring month, with an average temperature ranging between min 30.9°F (-0.6°C) and max 48.7°F (9.3°C). As April arrives, a slight rise in the average high-temperature is observed, moving from a wintry 40.6°F (4.8°C) in March to a frosty 48.7°F (9.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a refreshing month in Hanna, Wyoming, with an average temperature varying between 40.1°F (4.5°C) and 60.4°F (15.8°C). May's onset brings a rise in the average high-temperature, moving from a frosty 48.7°F (9.3°C) in April to a refreshing 60.4°F (15.8°C). Weather in May »

Weather in June

June, the first month of the summer in Hanna, is a warm month, with an average temperature fluctuating between 51.4°F (10.8°C) and 74.5°F (23.6°C). Hanna sees an increase in average high-temperatures during June, moving from a refreshing 60.4°F (15.8°C) in May to a warm 74.5°F (23.6°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Hanna, Wyoming, with an average temperature ranging between max 81.7°F (27.6°C) and min 58.3°F (14.6°C). July stands out as Hanna's warmest month, with temperatures ranging between an average high of 81.7°F (27.6°C) and a low of 58.3°F (14.6°C). Weather in July »

Weather in August

August, the last month of the summer in Hanna, is also a moderately hot month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 56.8°F (13.8°C). With the onset of August, a modest change to a still moderately hot 79.7°F (26.5°C) from July's 81.7°F (27.6°C) is noted in high-temperature. Weather in August »

Weather in September

September, the first month of the autumn in Hanna, is still a pleasant month, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 50.2°F (10.1°C). The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's moderately hot 79.7°F (26.5°C) to a pleasant 70.9°F (21.6°C). Weather in September »

Weather in October

October, the same as September, is a cool autumn month in Hanna, Wyoming, with an average temperature fluctuating between 52.7°F (11.5°C) and 35.1°F (1.7°C). October's onset witnesses a marked shift in the average high-temperature, moving from an agreeable 70.9°F (21.6°C) in September to a fresh 52.7°F (11.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Hanna, is another cold month, with temperature in the range of an average low of 24.1°F (-4.4°C) and an average high of 39°F (3.9°C). In Hanna, the average high-temperature in November drops from a fresh 52.7°F (11.5°C) in October to a cold 39°F (3.9°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Hanna, Wyoming, with temperature in the range of an average low of 13.1°F (-10.5°C) and an average high of 26.4°F (-3.1°C). December is Hanna's coldest month, registering average high temperatures of 26.4°F (-3.1°C) and lows of 13.1°F (-10.5°C). Weather in December »

Frequently asked questions

What is the most humid month?

January is the most humid month in Hanna, with an average relative humidity of 83%.

How many days does it rain?

In Hanna, during the entire year, the rain falls for 80.5 days and collects up to 8.39" (213mm) of precipitation.

When does it snow?

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

How many days does it snow?

Throughout the year, there are 70.3 snowfall days, and 29.57" (751mm) of snow is accumulated.

What are the months with 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 are the months with the least sunshine?

The months with the least sunshine in Hanna are February and December, with an average of 5.9h of sunshine.

When does it snow the most?

The month with the most snowfall is March, when snow falls for 10.8 days and typically aggregates up to 5.47" (139mm) of snow.

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?

The month with the most rainfall is April, when the rain falls for 10.4 days and typically aggregates up to 1.34" (34mm) of precipitation.

When it does not snow?

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

When are the longest days?

June has the longest days of the year, with an average of 15h and 12min of daylight.

What is the warmest month?

With its average high temperature of 81.7°F (27.6°C) and a low of 58.3°F (14.6°C), July is regarded as the warmest month.

What month has the most sunshine?

July has the most sunshine of the year, with an average of 12h 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 6.

What is the least humid month?

August is the least humid month in Hanna, with an average relative humidity of 34%.

What is the driest month?

The month with the least rainfall is August, when the rain falls for 5.7 days and typically collects 0.24" (6mm) of precipitation.

What is the coldest month?

December is the coldest month, with an average high-temperature of 26.4°F (-3.1°C) and an average low-temperature of 13.1°F (-10.5°C).

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

Average temperature
Hanna, WY

Average temperature - Hanna, WY

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (26.4°F).

The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).

Average pressure
Hanna, WY

Average pressure - Hanna, WY

The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed
Hanna, WY

Average wind speed - Hanna, WY

The windiest month (with the highest average wind speed) is November (12.4mph).
The calmest months (with the lowest average wind speed) are July and August (9.3mph).

Average humidity
Hanna, WY

Average humidity - Hanna, WY

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (34%).

Average rainfall
Hanna, WY

Average rainfall - Hanna, WY

The wettest month (with the highest rainfall) is April (1.34").
The driest month (with the least rainfall) is August (0.24").

Average rainfall days
Hanna, WY

Average rainfall days - Hanna, WY

The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is February (4.3 days).

Average snowfall
Hanna, WY

Average snowfall - Hanna, WY

The month with the highest snowfall is March (5.47").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Hanna, WY

Average snowfall days - Hanna, WY

The month with the highest number of snowfall days is February (12.5 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine
Hanna, WY

Average daylight / Average sunshine - Hanna, WY

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 5h and 54min).

Average sunshine days
Hanna, WY

Average sunshine days - Hanna, WY

The month with the most sunshine days is August (23.6 days).
The month with the least sunshine days is April (12.6 days).

Average UV index
Hanna, WY

Average UV index - Hanna, 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, October, November and December (UV index 2).

Average visibility
Hanna, WY

Average visibility - Hanna, WY

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

Hanna, Wyoming, USA

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