August weather forecastSumatra, MT
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Sumatra, Montana, with an average temperature fluctuating between 84.6°F (29.2°C) and 63.1°F (17.3°C).Temperature
Sumatra, Montana, registers an average high-temperature of a moderately hot 84.6°F (29.2°C) with the arrival of August, showing minor deviation from the preceding month. Throughout August in Sumatra, a steady low-temperature average of 63.1°F (17.3°C) is noted.Humidity
The least humid month in Sumatra is August, with an average relative humidity of 38%.Rainfall
In Sumatra, Montana, in August, it is raining for 10.4 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 99.5 rainfall days, and 11.06" (281mm) of precipitation is accumulated.Snowfall
In Sumatra, Montana, snow does not fall in June through August.Daylight
In Sumatra, the average length of the day in August is 14h and 8min.On the first day of August in Sumatra, sunrise is at 5:51 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 7:50 pm MDT.
Sunshine
In August, the average sunshine in Sumatra is 11.7h.UV index
The average daily maximum UV index in August in Sumatra is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 6 during August translates into the following guidance:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Sumatra, MT
- Average high temperature in August: 84.6°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The months with the lowest average high temperature are January and December (30.9°F).
- Average low temperature in August: 63.1°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in August
Sumatra, MT
- Average pressure in August: 29.89"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in August
Sumatra, MT
- Average wind speed in August: 8.3mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is July (8.2mph).
Average humidity in August
Sumatra, MT
- Average humidity in August: 38%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall in August
Sumatra, MT
- Average rainfall in August: 0.98"
The wettest month (with the highest rainfall) is May (1.81").
The driest months (with the least rainfall) are January, November and December (0.47").
Average rainfall days in August
Sumatra, MT
- Average rainfall days in August: 10.4 days
The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in August
Sumatra, MT
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Sumatra, MT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Sumatra, MT
- Average daylight in August: 14h and 6min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in August: 11h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 18min).
Average sunshine days in August
Sumatra, MT
- Average sunshine days in August: 16.5 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is April (14.2 days).
Average UV index in August
Sumatra, MT
- Average UV index in August: 6
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Sumatra, MT
- Average cloud cover in August: 15
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in August
Sumatra, 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).
