Climate and monthly weather forecast
Rock Springs, WY

Weather in January

January, like December, is a freezing cold winter month in Rock Springs, Wyoming, with an average temperature ranging between max 26.6°F (-3°C) and min 10.8°F (-11.8°C). In January, the average high-temperature is essentially the same as in December - a still subzero cold 26.6°F (-3°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Rock Springs, Wyoming, with an average temperature fluctuating between 13.5°F (-10.3°C) and 28.8°F (-1.8°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 28.8°F (-1.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Rock Springs, Wyoming, with an average temperature varying between 39.7°F (4.3°C) and 24.3°F (-4.3°C). In March, the average high-temperature rises from a subzero cold 28.8°F (-1.8°C) in February to a cold 39.7°F (4.3°C). Weather in March »

Weather in April

April in Rock Springs, Wyoming, is a chilly spring month, with an average temperature ranging between min 31.5°F (-0.3°C) and max 48.7°F (9.3°C). In Rock Springs, the average high-temperature in April increases from a wintry 39.7°F (4.3°C) in March to a frosty 48.7°F (9.3°C). Weather in April »

Weather in May

May, the last month of the spring in Rock Springs, is a mild month, with temperature in the range of an average high of 60.3°F (15.7°C) and an average low of 41.4°F (5.2°C). In May, the average high-temperature rises from a chilly 48.7°F (9.3°C) in April to a mild 60.3°F (15.7°C). Weather in May »

Weather in June

June, the first month of the summer in Rock Springs, is a moderately hot month, with temperature in the range of an average high of 73.9°F (23.3°C) and an average low of 52°F (11.1°C). In June, the average high-temperature rises from a moderate 60.3°F (15.7°C) in May to a warm 73.9°F (23.3°C). Weather in June »

Weather in July

July, like June, in Rock Springs, Wyoming, is another warm summer month, with an average temperature ranging between min 60.4°F (15.8°C) and max 81.5°F (27.5°C). With an average high-temperature of 81.5°F (27.5°C) and an average low-temperature of 60.4°F (15.8°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer in Rock Springs, is also a moderately hot month, with an average temperature ranging between max 79.3°F (26.3°C) and min 58.6°F (14.8°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 79.3°F (26.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Rock Springs, Wyoming, with an average temperature varying between 70.3°F (21.3°C) and 51.3°F (10.7°C). In September, the average high-temperature drops from a moderately hot 79.3°F (26.3°C) in August to an agreeable 70.3°F (21.3°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Rock Springs, Wyoming, with an average temperature fluctuating between 36°F (2.2°C) and 52.5°F (11.4°C). In October, the average high-temperature declines considerably from a pleasant 70.3°F (21.3°C) in September to a cool 52.5°F (11.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Rock Springs, Wyoming, with an average temperature varying between 38.7°F (3.7°C) and 23.9°F (-4.5°C). In Rock Springs, the average high-temperature in November decreases from a fresh 52.5°F (11.4°C) in October to a wintry 38.7°F (3.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Rock Springs, Wyoming, with an average temperature fluctuating between 25.7°F (-3.5°C) and 11.5°F (-11.4°C). December is the coldest month, with an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 11.5°F (-11.4°C). Weather in December »
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FAQ

What is the most humid month in Rock Springs?

With an average relative humidity of 84%, January is the most humid month in Rock Springs, Wyoming.

How much does it rain in Rock Springs?

In Rock Springs, Wyoming, during the entire year, the rain falls for 93.5 days and collects up to 10.31" (262mm) of precipitation.

When does it snow in Rock Springs?

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

How many days does it snow in Rock Springs?

In Rock Springs, Wyoming, during the entire year, snow falls for 75.5 days and aggregates up to 30.16" (766mm) of snow.

What is the month with the least sunshine in Rock Springs?

January and December, with an average of 5.9h of sunshine, are months with the least sunshine.

What are the months with the lowest UV index in Rock Springs?

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

What is the snowiest month in Rock Springs?

March is the month with the most snowfall in Rock Springs. Snow falls for 13 days and accumulates 6.14" (156mm) of snow.

When is Daylight Saving Time (DST) in Rock Springs?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Rock Springs, Wyoming, 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 wettest month in Rock Springs?

May is the month with the most rainfall in Rock Springs. Rain falls for 13.8 days and accumulates 1.5" (38mm) of precipitation.

When are the longest days in Rock Springs?

The month with the longest days is June, with an average of 15h and 8min of daylight.

What is the warmest month in Rock Springs?

July is the warmest month in Rock Springs, with an average high-temperature of 81.5°F (27.5°C) and an average low-temperature of 60.4°F (15.8°C).

What is the least humid month in Rock Springs?

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

What is the driest month in Rock Springs?

The month with the least rainfall in Rock Springs, Wyoming, is July, when the rain falls for 7.8 days and typically collects 0.47" (12mm) of precipitation.

When it does not snow in Rock Springs?

July and August are months without snowfall in Rock Springs, Wyoming.

What are the months with the most sunshine in Rock Springs?

July and August, with an average of 11.8h of sunshine, are months with the most sunshine.

When is the highest UV index in Rock Springs?

July is the month with the highest UV index in Rock Springs, Wyoming, with an average maximum UV index of 6.

What is the coldest month in Rock Springs?

With an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 11.5°F (-11.4°C), December is the coldest month in Rock Springs, Wyoming.

What is the month with the shortest days in Rock Springs?

December has the shortest days of the year, with an average of 9h and 13min of daylight.

Average temperature
Rock Springs, WY

Average temperature - Rock Springs, WY

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is December (25.7°F).

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

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Average pressure
Rock Springs, WY

Average pressure - Rock Springs, WY

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed
Rock Springs, WY

Average wind speed - Rock Springs, WY

The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity
Rock Springs, WY

Average humidity - Rock Springs, WY

The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are July and August (31%).

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Average rainfall
Rock Springs, WY

Average rainfall - Rock Springs, WY

The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is July (0.47").

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Average rainfall days
Rock Springs, WY

Average rainfall days - Rock Springs, WY

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is December (4.7 days).

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Average snowfall
Rock Springs, WY

Average snowfall - Rock Springs, WY

The month with the highest snowfall is March (6.14").
The months with the least snowfall are July and August (0").

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Average snowfall days
Rock Springs, WY

Average snowfall days - Rock Springs, WY

The month with the highest number of snowfall days is December (13.5 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight / Average sunshine
Rock Springs, WY

Average daylight / Average sunshine - Rock Springs, WY

The month with the longest days is June (Average daylight: 15h and 8min).
The month with the shortest days is December (Average daylight: 9h and 13min).

The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 54min).

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Average sunshine days
Rock Springs, WY

Average sunshine days - Rock Springs, WY

The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is April (11.5 days).

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Average UV index
Rock Springs, WY

Average UV index - Rock Springs, 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).

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Average visibility
Rock Springs, WY

Average visibility - Rock Springs, WY

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

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