July weather forecast
Decker, MT

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Weather in July

July, like June, in Decker, Montana, is a moderately hot summer month, with an average temperature ranging between min 61.5°F (16.4°C) and max 85.5°F (29.7°C).

Temperature

July is the warmest month of the year, registering average temperatures as high as 85.5°F (29.7°C) and as low as 61.5°F (16.4°C).

Heat index

July's mean heat index is computed to be a hot 86°F (30°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is found by incorporating humidity levels into the air temperature measurement. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

The average relative humidity in July is 43%.

Rainfall

In Decker, in July, during 10.7 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Decker, during the entire year, the rain falls for 127.6 days and collects up to 14.25" (362mm) of precipitation.

Snowfall

June through August are months without snowfall.

Daylight

In July, the average length of the day is 15h and 13min.
On the first day of July, sunrise is at 5:25 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 8:34 pm MDT.

Sunshine

The months with the most sunshine are July and August, with an average of 11.9h of sunshine.

UV index

With an average maximum UV index of 7, July is the month with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In July, an average UV index of 7 transforms into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Updated: Jul 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the hottest?

The warmest period tends to be July, when average temperatures fluctuate between a high of 85.5°F (29.7°C) and a low of 61.5°F (16.4°C).

Is it hot during July?

The high-temperature, in July, in Decker, is 85.5°F (29.7°C), while the low-temperature averages to 61.5°F (16.4°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, is computed to be 86°F (30°C).

What is the average humidity in July in Decker?

The average relative humidity in July in Decker is 43%.

How many days does it rain in July in Decker?

In Decker, during July, the rain falls for 10.7 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When it does not snow?

In Decker, Montana, snow does not fall in June through August.

What is the average length of the day in July?

In July, the average day length is 15h and 13min.

What time are sunrise and sunset in July?

In July, on the first day of the month, sunrise is at 5:25 am and sunset at 8:57 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 8:34 pm MDT.

What is the month with the most sunshine?

The months with the most sunshine are July and August, with an average of 11.9h of sunshine.

How long on average sun shines in July?

In July, the average sunshine duration is 11.9h.

When is the highest UV index?

With an average maximum UV index of 7, July is the month with the highest UV index.

How high is the UV index in July?

In July, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Decker, MT

Average temperature in July - Decker, MT
  • Average high temperature in July: 85.5°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (31.1°F).

  • Average low temperature in July: 61.5°F

The month with the highest average low temperature is July (61.5°F).
The coldest months (with the lowest average low temperature) are January and February (16.2°F).

Average pressure in July
Decker, MT

Average pressure in July - Decker, MT
  • Average pressure in July: 29.89"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).

Average wind speed in July
Decker, MT

Average wind speed in July - Decker, MT
  • Average wind speed in July: 6.8mph

The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and December (6.8mph).

Average humidity in July
Decker, MT

Average humidity in July - Decker, MT
  • Average humidity in July: 43%

The months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is August (40%).

Average rainfall in July
Decker, MT

Average rainfall in July - Decker, MT
  • Average rainfall in July: 1.14"

The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is December (0.67").

Average rainfall days in July
Decker, MT

Average rainfall days in July - Decker, MT
  • Average rainfall days in July: 10.7 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in July
Decker, MT

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

The month with the highest snowfall is February (5.2").
The months with the least snowfall are June, July and August (0").

Average snowfall days in July
Decker, MT

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

The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in July / Average sunshine in July - Decker, MT
  • Average daylight in July: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in July: 11h and 5min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).

Average sunshine days in July
Decker, MT

Average sunshine days in July - Decker, MT
  • Average sunshine days in July: 13.6 days

The month with the most sunshine days is September (18.2 days).
The month with the least sunshine days is May (9.6 days).

Average UV index in July
Decker, MT

Average UV index in July - Decker, MT
  • Average UV index in July: 7

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in July
Decker, MT

Average cloud cover in July - Decker, MT
  • Average cloud cover in July: 14

The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 14).

Average visibility in July
Decker, MT

Average visibility in July - Decker, 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).

Decker, Montana, USA

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