Climate and monthly weather forecast
Grand Junction, CO

The scenic Grand Junction in Colorado with the iconic Colorado River and high hills nearby
The scenic Grand Junction in Colorado with the iconic Colorado River and high hills nearby

Weather in January

January, the same as December, is another cold winter month in Grand Junction, Colorado, with an average temperature fluctuating between 18.3°F (-7.6°C) and 34.9°F (1.6°C). January is the coldest month, with an average high-temperature of 34.9°F (1.6°C) and an average low-temperature of 18.3°F (-7.6°C). Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Grand Junction, Colorado, with an average temperature varying between 39.6°F (4.2°C) and 23.5°F (-4.7°C). In February, the average high-temperature is essentially the same as in January - a still wintry 39.6°F (4.2°C). Weather in February »

Weather in March

March, the first month of the spring in Grand Junction, is a cool month, with temperature in the range of an average low of 32.7°F (0.4°C) and an average high of 50.7°F (10.4°C). In March, the average high-temperature increases from a wintry 39.6°F (4.2°C) in February to a cool 50.7°F (10.4°C). Weather in March »

Weather in April

April is a mild spring month in Grand Junction, Colorado, with temperature in the range of an average low of 37.8°F (3.2°C) and an average high of 58.6°F (14.8°C). In April, the average high-temperature slightly increases from a cool 50.7°F (10.4°C) in March to a moderate 58.6°F (14.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Grand Junction, Colorado, with an average temperature varying between 69.1°F (20.6°C) and 45°F (7.2°C). In Grand Junction, Colorado, the average high-temperature in May rises from a mild 58.6°F (14.8°C) in April to a pleasant 69.1°F (20.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Grand Junction, Colorado, with an average temperature ranging between min 54.7°F (12.6°C) and max 82.2°F (27.9°C). In Grand Junction, the average high-temperature in June increases from an agreeable 69.1°F (20.6°C) in May to a warm 82.2°F (27.9°C). Weather in June »

Weather in July

July in Grand Junction, Colorado, is a tropical summer month, with an average temperature ranging between min 60.4°F (15.8°C) and max 86.9°F (30.5°C). The warmest month is July, with an average high-temperature of 86.9°F (30.5°C) and an average low-temperature of 60.4°F (15.8°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Grand Junction, Colorado, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 58.8°F (14.9°C). In Grand Junction, the average high-temperature in August is practically the same as in July - a moderately hot 84.2°F (29°C). Weather in August »

Weather in September

September, the first month of the autumn in Grand Junction, is also a moderately hot month, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 53.1°F (11.7°C). In Grand Junction, Colorado, the average high-temperature in September marginally drops from a warm 84.2°F (29°C) in August to a still moderately hot 76.5°F (24.7°C). Weather in September »

Weather in October

October, like September, in Grand Junction, Colorado, is another enjoyable autumn month, with an average temperature ranging between max 60.8°F (16°C) and min 40.5°F (4.7°C). In October, the average high-temperature plummets from a warm 76.5°F (24.7°C) in September to a comfortable 60.8°F (16°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Grand Junction, Colorado, with an average temperature fluctuating between 30.4°F (-0.9°C) and 49.1°F (9.5°C). In Grand Junction, the average high-temperature in November drops from an enjoyable 60.8°F (16°C) in October to a chilly 49.1°F (9.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Grand Junction, Colorado, with an average temperature ranging between min 20.5°F (-6.4°C) and max 36.3°F (2.4°C). In December, the average high-temperature decreases from a frosty 49.1°F (9.5°C) in November to a cold 36.3°F (2.4°C). Weather in December »
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FAQ

What is the coldest month in Grand Junction?

January is the coldest month, with an average high-temperature of 34.9°F (1.6°C) and an average low-temperature of 18.3°F (-7.6°C).

What is the most humid month in Grand Junction?

With an average relative humidity of 78%, January is the most humid month in Grand Junction.

How much does it rain in Grand Junction?

Throughout the year, there are 93.6 rainfall days, and 8.46" (215mm) of precipitation is accumulated.

When does it snow in Grand Junction?

Months with snowfall in Grand Junction, Colorado, are January through April, October through December.

How much does it snow in Grand Junction?

Throughout the year, in Grand Junction, Colorado, there are 28.3 snowfall days, and 11.5" (292mm) of snow is accumulated.

What is the month with the least sunshine in Grand Junction?

The month with the least sunshine in Grand Junction, Colorado, is January, with an average of 6.3h of sunshine.

What are the months with the lowest UV index in Grand Junction?

The months with the lowest UV index in Grand Junction, Colorado, are January, February, November and December, with an average maximum UV index of 2.

What is the rainiest month in Grand Junction?

March is the month with the most rainfall in Grand Junction. Rain falls for 10.4 days and accumulates 1.06" (27mm) of precipitation.

When is Daylight Saving Time (DST) in Grand Junction?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Grand Junction, 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.

When it does not snow in Grand Junction?

May through September are months without snowfall in Grand Junction, Colorado.

What is the least humid month in Grand Junction?

With an average relative humidity of 29%, June is the least humid month in Grand Junction, Colorado.

What is the driest month in Grand Junction?

June is the month with the least rainfall in Grand Junction. Rain falls for 5.6 days and accumulates 0.51" (13mm) of precipitation.

When are the longest days in Grand Junction?

The month with the longest days in Grand Junction is June, with an average of 14h and 52min of daylight.

What month has the most sunshine in Grand Junction?

With an average of 12h of sunshine, June has the most sunshine of the year in Grand Junction.

What is the month with the highest UV index in Grand Junction?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Grand Junction, Colorado.

What is the warmest month in Grand Junction?

July is the warmest month in Grand Junction, with an average high-temperature of 86.9°F (30.5°C) and an average low-temperature of 60.4°F (15.8°C).

What is the snowiest month in Grand Junction?

December is the month with the most snowfall. Snow falls for 6.9 days and accumulates 3.74" (95mm) of snow.

What is the month with the shortest days in Grand Junction?

The month with the shortest days is December, with an average of 9h and 29min of daylight.

Average temperature
Grand Junction, CO

Average temperature - Grand Junction, CO

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (34.9°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 (18.3°F).

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Average pressure
Grand Junction, CO

Average pressure - Grand Junction, CO

The month with the highest atmospheric pressure is January (30.27"Hg).
The months with the lowest atmospheric pressure are May and June (29.9"Hg).

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Average wind speed
Grand Junction, CO

Average wind speed - Grand Junction, CO

The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).

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Average humidity
Grand Junction, CO

Average humidity - Grand Junction, CO

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is June (29%).

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Average rainfall
Grand Junction, CO

Average rainfall - Grand Junction, CO

The wettest month (with the highest rainfall) is March (1.06").
The driest month (with the least rainfall) is June (0.51").

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Average rainfall days
Grand Junction, CO

Average rainfall days - Grand Junction, CO

The month with the highest number of rainy days is March (10.4 days).
The month with the least rainy days is November (5.5 days).

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Average snowfall
Grand Junction, CO

Average snowfall - Grand Junction, CO

The month with the highest snowfall is December (3.74").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Grand Junction, CO

Average snowfall days - Grand Junction, CO

The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Grand Junction, CO

Average daylight / Average sunshine - Grand Junction, CO

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 18min).

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Average sunshine days
Grand Junction, CO

Average sunshine days - Grand Junction, CO

The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is February (15.8 days).

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Average UV index
Grand Junction, CO

Average UV index - Grand Junction, CO

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average visibility
Grand Junction, CO

Average visibility - Grand Junction, CO

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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