August weather forecast and climate
Simpson, MT

August, the last month of the summer, in Simpson, is another warm month, with average temperature ranging between max 81.3°F (27.4°C) and min 61.3°F (16.3°C).

Temperature

In Simpson, the average high-temperature is relatively the same as in July - a still moderately hot 81.3°F (27.4°C). In August, in Simpson, the average low-temperature is 61.3°F (16.3°C).

Heat index

The average heat index is evaluated at 81°F (27.2°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like metabolic differences, clothing, differences in body mass, height, and shape, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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 in Simpson is August, with an average relative humidity of 40%.

Rainfall

In Simpson, it is raining for 8 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 98.7 rainfall days, and 8.23" (209mm) of precipitation is accumulated.

Snowfall

In Simpson snow does not fall in June through August.

Daylight

In August, the average length of the day in Simpson is 14.3h.

Sunshine

In Simpson, the average sunshine in August is 11.6h.

UV index

The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in August transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the temperature in August in Simpson?

The average high-temperature, in August, in Simpson, Montana, is 81.3°F (27.4°C), while the average low-temperature is 61.3°F (16.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, in August is estimated at 81°F (27.2°C).

What is the least humid month in Simpson?

With an average relative humidity of 40%, August is the least humid month.

What is the average humidity in August in Simpson?

In Simpson, the average relative humidity in August is 40%.

How much does it rain in Simpson in August?

In Simpson, during August, the rain falls for 8 days and regularly aggregates up to 0.59" (15mm) of precipitation.

Does it snow in Simpson in August?

In Simpson, Montana, in August, it doesn't snow. In September, it regularly snows.

When it does not snow in Simpson?

In Simpson snow does not fall in June through August.

How many hours of daylight does Simpson have in August?

The average length of the day in August in Simpson is 14.3h.

How many hours of sunshine does Simpson have in August?

In August, the average sunshine in Simpson is 11.6h.

What is the UV index reading in August in Simpson?

In Simpson, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.
Average temperature in August - Simpson, MT
  • Average high temperature in August: 81.3°F

The warmest month (with the highest average high temperature) is July (82.8°F).
Months with the lowest average high temperature are January and December (27.1°F).

  • Average low temperature in August: 61.3°F

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).

Average pressure in August - Simpson, MT
  • Average pressure in August: 29.88"

Months with the highest atmospheric pressure are January and February (30.12").
The month with the lowest atmospheric pressure is June (29.84").

Average wind speed in August - Simpson, MT
  • Average wind speed in August: 8.5mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

Average humidity in August - Simpson, MT
  • Average humidity in August: 40%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (40%).

Average rainfall in August - Simpson, MT
  • Average rainfall in August: 0.59"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is December (0.31").

Average rainfall days in August - Simpson, MT
  • Average rainfall days in August: 8 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (4 days).

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

The month with the highest snowfall is February (2.72").
Months with the least snowfall are June, July and August (0").

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

The month with the highest number of snowfall days is February (11 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in August / Average sunshine in August - Simpson, MT
  • Average daylight in August: 14.3h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in August: 11.6h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is February (Average sunshine: 5.3h).

Average sunshine days in August - Simpson, MT
  • Average sunshine days in August: 18.7 days

The month with the most sunshine days is September (20.3 days).
The month with the least sunshine days is April (12.8 days).

Average UV index in August - Simpson, MT
  • Average UV index in August: 5

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

Average cloud cover in August - Simpson, MT
  • Average cloud cover in August: 16

The month with the most cloud cover is February (Cloud cover 46).
Months with the least cloud cover are July and August (Cloud cover 16).

Average visibility in August - Simpson, MT
  • Average visibility in August: 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).