July weather forecast
Lewistown, MT

Weather in July

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

Temperature

July is the warmest month, 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, the rain falls for 11.2 days. Throughout July, 1.06" (27mm) of precipitation is accumulated. Throughout the year, in Lewistown, there are 126.2 rainfall days, and 17.83" (453mm) of precipitation is accumulated.

Snowfall

July and August are months without snowfall.

Daylight

In Lewistown, the average length of the day in July is 15h and 27min.
On the first day of the month, sunrise is at 5:26 am and sunset at 9:16 pm. On the last day of July, sunrise is at 5:56 am and sunset at 8:52 pm MDT.

Sunshine

July has the most sunshine of the year in Lewistown, with an average of 11.8h of sunshine.

UV index

With an average maximum UV index of 6, July is the month with the highest UV index in Lewistown. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to 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. A wide-brim hat offers excellent sun protection for the 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?

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

What is the temperature in July in Lewistown?

In Lewistown, in July, the average high-temperature is 78.8°F (26°C), and the average low-temperature is 54.3°F (12.4°C).

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?

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

Does it snow in Lewistown in July?

In July, in Lewistown, 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?

The average day length in July in Lewistown, Montana, is 15h and 27min.

What time are sunrise and sunset in July in Lewistown?

In July, on the first day of the month, sunrise is at 5:26 am and sunset at 9:16 pm. On the last day of the month, in Lewistown, Montana, sunrise is at 5:56 am and sunset at 8:52 pm MDT.

What month has the most sunshine in Lewistown?

July has the most sunshine of the year in Lewistown, with an average of 11.8h of sunshine.

How many hours of sunshine does Lewistown have in July?

In Lewistown, the average sunshine duration in July is 11.8h.

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

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

How high is the UV index 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 vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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).
The 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"Hg

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

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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").
The 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).
The 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: 15h and 27min

The month with the longest days is June (Average daylight: 15h and 50min).
The month with the shortest days is December (Average daylight: 8h and 35min).

  • Average sunshine in July: 11h and 48min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).

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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).
The 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

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

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