August weather forecast
Sidney, MT

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Weather in August

August carries forward the high temperatures from July, dominating the last full month of summer. Sidney has a continual buzz with late-night gatherings, barbecues, and other summertime traditions. Sunscreen is an absolute necessity with 11.5hours of sunshine during the day. While temperatures begin to take on a slight decrease, the warmth of 82.8°F (28.2°C) keeps the summer spirit alive. The vast and clear Montana sky allows an exceptional view of the evening’s stars.

Temperature

The unfolding of August shows an average high-temperature of a still warm 82.8°F (28.2°C), indicating a slight variance from July's 84.2°F (29°C). The nighttime temperature, during August, averages of 62.2°F (16.8°C).

Heat index

The heat index in August is evaluated at 82.4°F (28°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.
Know that the heat index computations account for shaded terrains and slight winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.

Humidity

With an average relative humidity of 45%, August is the least humid month in Sidney.

Rainfall

In Sidney, in August, it is raining for 8.8 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 85.7 rainfall days, and 8.5" (216mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In August, the average length of the day is 14h and 13min.
On the first day of the month, sunrise is at 5:34 am and sunset at 8:30 pm. On the last day of August, sunrise is at 6:14 am and sunset at 7:38 pm MDT.

Sunshine

In August, the average sunshine in Sidney is 11.5h.

UV index

The average daily maximum UV index in August in Sidney is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In August, the UV index of 6 transforms into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Frequently asked questions

How hot is it in Sidney in August?

August temperatures in Sidney, Montana, vary between a high-temperature of 82.8°F (28.2°C) and a low-temperature of 62.2°F (16.8°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 82.4°F (28°C).

What is the least humid month in Sidney?

The least humid month is August, with an average relative humidity of 45%.

What is the average humidity in August in Sidney?

In Sidney, Montana, the average relative humidity in August is 45%.

How much does it rain in Sidney in August?

In August, in Sidney, the rain falls for 8.8 days. Throughout August, 0.87" (22mm) of precipitation is accumulated.

When it does not snow in Sidney?

In Sidney, Montana, snow does not fall in June through September.

What is the average length of the day in August in Sidney?

In Sidney, Montana, the average day length in August is 14h and 13min.

What time are sunrise and sunset in August in Sidney?

On the first day of August in Sidney, Montana, sunrise is at 5:34 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 7:38 pm MDT.

How many hours of sunshine does Sidney have in August?

The average sunshine duration in August is 11.5h.

How high is the UV index in August in Sidney?

The average daily maximum UV index in August in Sidney is 6. A UV Index reading of 6 to 7 represents a high health threat from exposure to the Sun's 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 August
Sidney, MT

Average temperature in August - Sidney, MT
  • Average high temperature in August: 82.8°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in August: 62.2°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).

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Average pressure in August
Sidney, MT

Average pressure in August - Sidney, MT
  • Average pressure in August: 29.89"Hg

The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in August
Sidney, MT

Average wind speed in August - Sidney, MT
  • Average wind speed in August: 9.3mph

The windiest months (with the highest average wind speed) are April and October (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).

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Average humidity in August
Sidney, MT

Average humidity in August - Sidney, MT
  • Average humidity in August: 45%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (45%).

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Average rainfall in August
Sidney, MT

Average rainfall in August - Sidney, MT
  • Average rainfall in August: 0.87"

The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is January (0.24").

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Average rainfall days in August
Sidney, MT

Average rainfall days in August - Sidney, MT
  • Average rainfall days in August: 8.8 days

The month with the highest number of rainy days is June (11.4 days).
The months with the least rainy days are January and February (3.2 days).

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Average snowfall in August
Sidney, MT

Average snowfall in August - Sidney, MT
  • Average snowfall in August: 0"

The month with the highest snowfall is February (1.77").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Sidney, MT

Average snowfall days in August - Sidney, MT
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (12 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Sidney, MT

Average daylight in August / Average sunshine in August - Sidney, MT
  • Average daylight in August: 14h and 1min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in August: 11h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average sunshine days in August
Sidney, MT

Average sunshine days in August - Sidney, MT
  • Average sunshine days in August: 18.5 days

The month with the most sunshine days is September (20.7 days).
The month with the least sunshine days is April (15.8 days).

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Average UV index in August
Sidney, MT

Average UV index in August - Sidney, MT
  • Average UV index in August: 6

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and February (UV index 1).

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Average cloud cover in August
Sidney, MT

Average cloud cover in August - Sidney, MT
  • Average cloud cover in August: 19

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 18).

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Average visibility in August
Sidney, MT

Average visibility in August - Sidney, MT
  • Average visibility in August: 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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Sidney, Montana, USA

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