Grand Junction
Colorado, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Grand Junction, CO

The unique beauty, at the scenic Grand Junction in Colorado, and the iconic Colorado River and high hills nearby, with distant hills
The unique beauty, at the scenic Grand Junction in Colorado, and the iconic Colorado River and high hills nearby, with distant hills
January, like December, in Grand Junction, Colorado, is a wintry winter month, with temperature in the range of an average high of 34.9°F (1.6°C) and an average low of 18.3°F (-7.6°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 »

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

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

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

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

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

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

The last month of the summer, August, is also a moderately hot month in Grand Junction, Colorado, with average temperature ranging between min 58.8°F (14.9°C) and max 84.2°F (29°C). In August, the average high-temperature is relatively the same as in July - a moderately hot 84.2°F (29°C). Weather in August »

The first month of the autumn, September, is still a warm month in Grand Junction, Colorado, with average temperature varying between 76.5°F (24.7°C) and 53.1°F (11.7°C). In September, the average high-temperature slightly decreases, from 84.2°F (29°C) in August, to a still moderately hot 76.5°F (24.7°C). Weather in September »

October, the same as September, is another comfortable autumn month in Grand Junction, Colorado, with temperature in the range of an average high of 60.8°F (16°C) and an average low of 40.5°F (4.7°C). In Grand Junction, Colorado, the average high-temperature declines considerably, from a warm 76.5°F (24.7°C) in September, to an enjoyable 60.8°F (16°C). Weather in October »

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

December, the first month of the winter, in Grand Junction, is still a cold month, with average temperature fluctuating between 36.3°F (2.4°C) and 20.5°F (-6.4°C). In Grand Junction, the average high-temperature in December drops, from a chilly 49.1°F (9.5°C) in November, to a cold 36.3°F (2.4°C). Weather in December »

What is the coldest month in Grand Junction?

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

What is the most humid month in Grand Junction?

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

How many days does it rain in Grand Junction?

In Grand Junction, during the entire year, the rain falls for 93.6 days and collects up to 8.46" (215mm) of precipitation.

When does it snow in Grand Junction?

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

How much does it snow in Grand Junction?

Throughout the year, 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 is January, with an average of 6.3h of sunshine.

When is the lowest UV index in Grand Junction?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the wettest month in Grand Junction?

The month with the most rainfall in Grand Junction is March when the rain falls for 10.4 days and typically aggregates up to 1.06" (27mm) of precipitation.

When it does not snow in Grand Junction?

In Grand Junction snow does not fall in May through September.

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?

June has the longest days of the year in Grand Junction, with an average of 14.9h of daylight.

What month has the most sunshine in Grand Junction?

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

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

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

What is the warmest month in Grand Junction?

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).

What is the snowiest month in Grand Junction?

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

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

December has the shortest days of the year in Grand Junction, with an average of 9.5h of daylight.
Average temperature - Grand Junction, CO
Average humidity - Grand Junction, CO
Average rainfall - 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 lowest number of rainy days is November (5.5 days).

Average snowfall - Grand Junction, CO
Average snowfall days - Grand Junction, CO

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

Average daylight / Average sunshine - Grand Junction, CO
Average UV index - Grand Junction, CO