July weather forecast and climate
Boulder, MT

Weather in July

July is a moderately hot summer month in Boulder, Montana, with average temperature fluctuating between 48.4°F (9.1°C) and 79.7°F (26.5°C).

Temperature

With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 48.4°F (9.1°C), July is the warmest month.

Humidity

In Boulder, the average relative humidity is 47%.

Rainfall

In Boulder, during July, the rain falls for 9.9 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Boulder, during the entire year, the rain falls for 133.7 days and collects up to 16.38" (416mm) of precipitation.

Snowfall

In Boulder snow does not fall in July and August.

Daylight

In Boulder, Montana, the average length of the day is 15.3h.

Sunshine

The month with the most sunshine in Boulder is July, with an average of 11.7h of sunshine.

UV index

With an average maximum UV index of 6, July is the month with the highest UV index in Boulder. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Boulder?

With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 48.4°F (9.1°C), July is the warmest month in Boulder.

What is the average humidity in July in Boulder?

In Boulder, Montana, the average relative humidity in July is 47%.

How much does it rain in Boulder in July?

In Boulder, Montana, in July, during 9.9 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When it does not snow in Boulder?

In Boulder, Montana, snow does not fall in July and August.

Does it snow in Boulder in July?

In July, in Boulder, Montana, it doesn't snow. June is the latest month when it typically snows.

How many hours of daylight does Boulder have in July?

In Boulder, the average length of the day in July is 15.3h.

What month has the most sunshine in Boulder?

With an average of 11.7h of sunshine, July has the most sunshine of the year in Boulder.

How many hours of sunshine does Boulder have in July?

The average sunshine in July in Boulder, Montana, is 11.7h.

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

July is the month with the highest UV index in Boulder, Montana, with an average maximum UV index of 6.

What is the UV index reading in July in Boulder?

In July, the average daily maximum UV index in Boulder is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in July
Boulder, MT

Average temperature in July - Boulder, MT
  • Average high temperature in July: 79.7°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (27°F).

  • Average low temperature in July: 48.4°F

The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).

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Average pressure in July
Boulder, MT

Average pressure in July - Boulder, MT
  • Average pressure in July: 29.96"

The month with the highest atmospheric pressure is January (30.19").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in July
Boulder, MT

Average wind speed in July - Boulder, MT
  • Average wind speed in July: 4.9mph

The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in July
Boulder, MT

Average humidity in July - Boulder, MT
  • Average humidity in July: 47%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).

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Average rainfall in July
Boulder, MT

Average rainfall in July - Boulder, MT
  • Average rainfall in July: 1.02"

The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").

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Average rainfall days in July
Boulder, MT

Average rainfall days in July - Boulder, MT
  • Average rainfall days in July: 9.9 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).

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Average snowfall in July
Boulder, MT

Average snowfall in July - Boulder, MT
  • Average snowfall in July: 0"

The month with the highest snowfall is February (9.72").
Months with the least snowfall are July and August (0").

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Average snowfall days in July
Boulder, MT

Average snowfall days in July - Boulder, MT
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (18 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in July /
Average sunshine in July
Boulder, MT

Average daylight in July / Average sunshine in July - Boulder, MT
  • Average daylight in July: 15.3h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in July: 11.7h

The month with the most sunshine is July (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.6).

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Average sunshine days in July
Boulder, MT

Average sunshine days in July - Boulder, MT
  • Average sunshine days in July: 17 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).

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Average UV index in July
Boulder, MT

Average UV index in July - Boulder, MT
  • Average UV index in July: 6

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in July
Boulder, MT

Average cloud cover in July - Boulder, MT
  • Average cloud cover in July: 16

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in July
Boulder, MT

Average visibility in July - Boulder, MT
  • Average visibility in July: 6mi

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

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