Monthly weather forecast and climate
Granby, CO

Weather in January

January, the same as December, in Granby, Colorado, is a freezing cold winter month, with average temperature ranging between min 4.3°F (-15.4°C) and max 25°F (-3.9°C). In Granby, the average high-temperature is practically the same as in December - a still freezing cold 25°F (-3.9°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Granby, Colorado, with average temperature ranging between min 6.3°F (-14.3°C) and max 25.7°F (-3.5°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 25.7°F (-3.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a cold month in Granby, Colorado, with average temperature varying between 13.5°F (-10.3°C) and 33.6°F (0.9°C). In Granby, the average high-temperature marginally rises, from a freezing cold 25.7°F (-3.5°C) in February, to a cold 33.6°F (0.9°C). Weather in March »

Weather in April

April, like March, in Granby, Colorado, is another cold spring month, with average temperature fluctuating between 19.2°F (-7.1°C) and 40.1°F (4.5°C). In Granby, Colorado, the average high-temperature in April marginally rises, from 33.6°F (0.9°C) in March, to a still cold 40.1°F (4.5°C). Weather in April »

Weather in May

The last month of the spring, May, is a fresh month in Granby, Colorado, with average temperature fluctuating between 28.6°F (-1.9°C) and 52.3°F (11.3°C). In Granby, the average high-temperature in May increases, from a cold 40.1°F (4.5°C) in April, to a fresh 52.3°F (11.3°C). Weather in May »

Weather in June

The first month of the summer, June, is an enjoyable month in Granby, Colorado, with average temperature varying between 67.5°F (19.7°C) and 38.5°F (3.6°C). In Granby, the average high-temperature increases considerably, from a cool 52.3°F (11.3°C) in May, to a comfortable 67.5°F (19.7°C). Weather in June »

Weather in July

July in Granby, Colorado, is an agreeable summer month, with average temperature varying between 72.3°F (22.4°C) and 43.7°F (6.5°C). The warmest month is July, with an average high-temperature of 72.3°F (22.4°C) and an average low-temperature of 43.7°F (6.5°C). Weather in July »

Weather in August

August, the last month of the summer, in Granby, is another pleasant month, with average temperature ranging between min 42.1°F (5.6°C) and max 71.2°F (21.8°C). In August, the average high-temperature is essentially the same as in July - a still agreeable 71.2°F (21.8°C). Weather in August »

Weather in September

September, the first month of the autumn, in Granby, is still a comfortable month, with average temperature fluctuating between 64.4°F (18°C) and 36.9°F (2.7°C). In September, the average high-temperature slightly decreases, from a pleasant 71.2°F (21.8°C) in August, to an enjoyable 64.4°F (18°C). Weather in September »

Weather in October

October, the same as September, in Granby, Colorado, is another chilly autumn month, with average temperature varying between 25.5°F (-3.6°C) and 47.8°F (8.8°C). In Granby, the average high-temperature plummets, from a comfortable 64.4°F (18°C) in September, to a chilly 47.8°F (8.8°C). Weather in October »

Weather in November

November, the last month of the autumn, in Granby, is also a wintry month, with temperature in the range of an average low of 14.9°F (-9.5°C) and an average high of 35.2°F (1.8°C). In November, the average high-temperature drops, from a chilly 47.8°F (8.8°C) in October, to a wintry 35.2°F (1.8°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Granby, Colorado, with temperature in the range of an average high of 24.6°F (-4.1°C) and an average low of 5°F (-15°C). The coldest month is December, with an average high-temperature of 24.6°F (-4.1°C) and an average low-temperature of 5°F (-15°C). Weather in December »
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FAQ

How many days does it rain in Granby?

In Granby, during the entire year, the rain falls for 96.3 days and collects up to 11.54" (293mm) of precipitation.

When does it snow in Granby?

Months with snowfall are January through June, August through December.

How much does it snow in Granby?

Throughout the year, in Granby, Colorado, there are 110.7 snowfall days, and 59.88" (1521mm) of snow is accumulated.

When is the lowest UV index in Granby?

Months with the lowest UV index in Granby, Colorado, are January through April, October through December, with an average maximum UV index of 2.

What is the most humid month in Granby?

February is the most humid month, with an average relative humidity of 87%.

What is the month with the least sunshine in Granby?

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

What is the snowiest month in Granby?

The month with the most snowfall is April when snow falls for 15.1 days and typically aggregates up to 10.94" (278mm) of snow.

What is the rainiest month in Granby?

The month with the most rainfall is May when the rain falls for 12.8 days and typically aggregates up to 1.73" (44mm) of precipitation.

What is the least humid month in Granby?

June is the least humid month, with an average relative humidity of 49%.

When are the longest days in Granby?

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

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

Months with the highest UV index are June through August, with an average maximum UV index of 4.

What is the warmest month in Granby?

July is the warmest month in Granby, Colorado, with an average high-temperature of 72.3°F (22.4°C) and an average low-temperature of 43.7°F (6.5°C).

When it does not snow in Granby?

July is the only month when snow does not fall.

What is the month with the most sunshine in Granby?

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

What is the driest month in Granby?

The month with the least rainfall in Granby, Colorado, is August when the rain falls for 8.8 days and typically collects 0.55" (14mm) of precipitation.

What is the coldest month in Granby?

The coldest month in Granby, Colorado, is December, with an average high-temperature of 24.6°F (-4.1°C) and an average low-temperature of 5°F (-15°C).

What is the month with the shortest days in Granby?

With an average of 9.4h of daylight, December has the shortest days of the year.

Average pressure
Granby, CO

Average pressure - Granby, CO

The month with the highest atmospheric pressure is January (30.19").
Months with the lowest atmospheric pressure are April, May and June (29.93").

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Average wind speed
Granby, CO

Average wind speed - Granby, CO

The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average rainfall
Granby, CO

Average rainfall - Granby, CO

The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is August (0.55").

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Average rainfall days
Granby, CO

Average rainfall days - Granby, CO

The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is October (4.9 days).

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Average snowfall days
Granby, CO

Average snowfall days - Granby, CO

The month with the highest number of snowfall days is February (16.1 days).
The month with the least snowfall days is July (0 days).

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Average daylight / Average sunshine
Granby, CO

Average daylight / Average sunshine - Granby, CO

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

Months with the most sunshine are July and August (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 6.2h).

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Average sunshine days
Granby, CO

Average sunshine days - Granby, CO

Months with the most sunshine days are September and November (19.5 days).
The month with the least sunshine days is May (9.5 days).

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Average UV index
Granby, CO

Average UV index - Granby, CO

Months with the highest UV index are June, July and August (UV index 4).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average visibility
Granby, CO

Average visibility - Granby, CO

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

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