Helena
Montana, USA
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
Helena, MT

The State Capital building of Montana in Helena city, set on a beautiful natural park
The State Capital building of Montana in Helena city, set on a beautiful natural park
July, like June, in Helena, Montana, is another warm summer month, with average temperature varying between 54.3°F (12.4°C) and 85.6°F (29.8°C).

Temperature

July is the warmest month, with an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 54.3°F (12.4°C).

Heat index

In July, the average heat index is evaluated at a tropical 86.4°F (30.2°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like metabolic differences, clothing, differences in body mass, height, and shape, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The least humid month is July, with an average relative humidity of 46.4%.

Rainfall

In Helena, during 7.7 rainfall days, 1.2" (30.2mm) of precipitation is typically accumulated. In Helena, during the entire year, the rain falls for 91.6 days and collects up to 11.2" (284.9mm) of precipitation.

Snowfall

In Helena snow does not fall in June and July.

Daylight

In July, the average length of the day in Helena is 15.4h.

Sunshine

July has the most sunshine of the year, with an average of 11.9h of sunshine.

UV index

July is the month with the highest UV index in Helena, with an average maximum UV index of 9. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In July, the average maximum UV index of 9 translate into the following recommendations:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.

What is the warmest month in Helena?

With an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 54.3°F (12.4°C), July is the warmest month in Helena.

What is the temperature in July in Helena?

In July, the average high-temperature is 85.6°F (29.8°C), and the average low-temperature is 54.3°F (12.4°C). In July, the average heat index (a.k.a. 'real feel', 'feels like'), that combines both air temperature and relative humidity, is appraised at 86.4°F (30.2°C).

What is the least humid month in Helena?

July is the least humid month in Helena, with an average relative humidity of 46.4%.

What is the average humidity in July in Helena?

In July, the average relative humidity is 46.4%.

How many days does it rain in July in Helena?

In Helena, Montana, during July, the rain falls for 7.7 days and regularly aggregates up to 1.2" (30.2mm) of precipitation.

Does it snow in Helena in July?

In Helena, in July, it doesn't snow. In August, it regularly snows.

When it does not snow in Helena?

In Helena, Montana, snow does not fall in June and July.

What is the average length of the day in July in Helena?

The average length of the day in July in Helena, Montana, is 15.4h.

What month has the most sunshine in Helena?

July has the most sunshine of the year, with an average of 11.9h of sunshine.

How many hours of sunshine does Helena have in July?

In Helena, the average sunshine in July is 11.9h.

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

The month with the highest UV index in Helena, Montana, is July, with an average maximum UV index of 9.

How high is the UV index in July in Helena?

The average daily maximum UV index in July is 9. A UV Index reading of 8 to 10 represents a very high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in July - Helena, MT
  • Average high temperature in July: 85.7°F

The warmest month (with the highest average high temperature) is July (85.7°F).
The month with the lowest average high temperature is December (31.7°F).

  • Average low temperature in July: 54.3°F

The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is December (11.9°F).

Average humidity in July - Helena, MT
  • Average humidity in July: 46.4%

The month with the highest relative humidity is December (68.1%).
The month with the lowest relative humidity is July (46.4%).

Average rainfall in July - Helena, MT
  • Average rainfall in July: 1.2"

The wettest month (with the highest rainfall) is June (2.1").
The driest month (with the lowest rainfall) is February (0.3").

Average rainfall days in July - Helena, MT
  • Average rainfall days in July: 7.7 days

The month with the highest number of rainy days is June (11.2 days).
The month with the lowest number of rainy days is February (5.9 days).

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

The month with the highest snowfall is December (7.3").
Months with the lowest snowfall are June and July (0").

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

The month with the highest number of snowfall days is December (6 days).
The month with the lowest number of snowfall days is July (0 days).

Average daylight in July / Average sunshine in July - Helena, MT
  • Average daylight in July: 15.4h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in July: 11.9h

The month with most sunshine is July (Average sunshine: 11.9h).
The month with least sunshine is December (Average sunshine: 3.2h).

Average UV index in July - Helena, MT
  • Average UV index in July: 9

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 1).