July weather forecast
Lewistown, MT

Weather in July

July in Lewistown, Montana, is a moderately hot summer month, with average temperature fluctuating between 78.8°F (26°C) and 54.3°F (12.4°C).

Temperature

The warmest month is July, with an average high-temperature of 78.8°F (26°C) and an average low-temperature of 54.3°F (12.4°C).

Humidity

The average relative humidity in July is 51%.

Rainfall

In July, in Lewistown, Montana, the rain falls for 11.2 days. Throughout July, 1.06" (27mm) of precipitation is accumulated. In Lewistown, during the entire year, the rain falls for 126.2 days and collects up to 17.83" (453mm) of precipitation.

Snowfall

In Lewistown snow does not fall in July and August.

Daylight

In Lewistown, the average length of the day is 15.4h.

Sunshine

The month with the most sunshine in Lewistown is July, with an average of 11.8h of sunshine.

UV index

The month with the highest UV index in Lewistown is July, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 6 in July transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Lewistown?

With an average high-temperature of 78.8°F (26°C) and an average low-temperature of 54.3°F (12.4°C), July is the warmest month in Lewistown.

What is the average humidity in July in Lewistown?

In July, the average relative humidity in Lewistown is 51%.

How many days does it rain in July in Lewistown?

In Lewistown, in July, it is raining for 11.2 days, with typically 1.06" (27mm) of accumulated precipitation.

When it does not snow in Lewistown?

July and August are months without snowfall in Lewistown.

Does it snow in Lewistown in July?

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

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

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

What month has the most sunshine in Lewistown?

The month with the most sunshine is July, with an average of 11.8h of sunshine.

How long on average sun shines in July in Lewistown?

The average sunshine in July in Lewistown is 11.8h.

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

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

What is the UV index intensity in July in Lewistown?

In Lewistown, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV radiation.

Average temperature in July
Lewistown, MT

Average temperature in July - Lewistown, MT
  • Average high temperature in July: 78.8°F

The warmest month (with the highest average high temperature) is July (78.8°F).
Months with the lowest average high temperature are February and December (29.1°F).

  • Average low temperature in July: 54.3°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).

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Average pressure in July
Lewistown, MT

Average pressure in July - Lewistown, MT
  • Average pressure in July: 29.9"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in July
Lewistown, MT

Average wind speed in July - Lewistown, MT
  • Average wind speed in July: 7.6mph

The windiest months (with the highest average wind speed) are January, April and October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

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Average humidity in July
Lewistown, MT

Average humidity in July - Lewistown, MT
  • Average humidity in July: 51%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in July
Lewistown, MT

Average rainfall in July - Lewistown, MT
  • Average rainfall in July: 1.06"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in July
Lewistown, MT

Average rainfall days in July - Lewistown, MT
  • Average rainfall days in July: 11.2 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in July
Lewistown, MT

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

The month with the highest snowfall is April (9.13").
Months with the least snowfall are July and August (0").

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Average snowfall days in July
Lewistown, MT

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

The month with the highest number of snowfall days is February (15.2 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
Lewistown, MT

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

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

  • Average sunshine in July: 11.8h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5.5h).

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Average sunshine days in July
Lewistown, MT

Average sunshine days in July - Lewistown, MT
  • Average sunshine days in July: 16.6 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (8.3 days).

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Average UV index in July
Lewistown, MT

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

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in July
Lewistown, MT

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

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in July
Lewistown, MT

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

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

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