August weather forecastWestby, MT
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Westby, Montana, with an average temperature ranging between max 81.3°F (27.4°C) and min 60.6°F (15.9°C).Temperature
The introduction of August notes a subtle temperature variation to a still moderately hot 81.3°F (27.4°C) from July's 82°F (27.8°C). In the month of August, the average temperature dips to a moderate 60.6°F (15.9°C) during the night.Heat index
The heat index value during August is calculated to be 82.4°F (28°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.It is important to note that the heat index values are for shaded areas and light wind scenarios. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for 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
The least humid month in Westby is August, with an average relative humidity of 46%.Rainfall
In Westby, in August, it is raining for 9 days, with typically 0.87" (22mm) of accumulated precipitation. Throughout the year, there are 93.3 rainfall days, and 12.01" (305mm) of precipitation is accumulated.Snowfall
In Westby, snow does not fall in June through September.Daylight
In Westby, the average length of the day in August is 14h and 19min.On the first day of the month, sunrise is at 6:30 am and sunset at 9:34 pm. On the last day of August, sunrise is at 7:12 am and sunset at 8:39 pm CDT.
Sunshine
In Westby, the average sunshine in August is 11.5h.UV index
In Westby, 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 unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 5 in August leads to these guidelines:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Westby, MT
- Average high temperature in August: 81.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (19.8°F).
- Average low temperature in August: 60.6°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (6.3°F).
Average pressure in August
Westby, MT
- Average pressure in August: 29.89"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in August
Westby, MT
- Average wind speed in August: 9.3mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).
Average humidity in August
Westby, MT
- Average humidity in August: 46%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is August (46%).
Average rainfall in August
Westby, MT
- Average rainfall in August: 0.87"
The wettest month (with the highest rainfall) is June (2.17").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in August
Westby, MT
- Average rainfall days in August: 9 days
The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in August
Westby, MT
- Average snowfall in August: 0"
The month with the highest snowfall is November (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Westby, MT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Westby, MT
- Average daylight in August: 14h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in August: 11h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in August
Westby, MT
- Average sunshine days in August: 20.1 days
The month with the most sunshine days is August (20.1 days).
The months with the least sunshine days are February and June (13.8 days).
Average UV index in August
Westby, MT
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in August
Westby, MT
- Average cloud cover in August: 19
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 19).
Average visibility in August
Westby, MT
- Average visibility in August: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
