October weather forecastSumatra, MT
October
Weather in October
October, the same as September, in Sumatra, Montana, is a moderate autumn month, with an average temperature fluctuating between 57.2°F (14°C) and 41.4°F (5.2°C).Temperature
October is characterized by a clear drop in the average high-temperature, falling from September's moderately hot 74.5°F (23.6°C) to a mild 57.2°F (14°C). Sumatra experiences a mean low-temperature of 41.4°F (5.2°C) during October.Humidity
In October, the average relative humidity is 55%.Rainfall
In October, in Sumatra, Montana, the rain falls for 8.6 days. Throughout October, 0.79" (20mm) of precipitation is accumulated. In Sumatra, Montana, during the entire year, the rain falls for 99.5 days and collects up to 11.06" (281mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Sumatra, in October, snow falls for 2 days, with typically accumulated 0.51" (13mm) of snow. In Sumatra, during the entire year, snow falls for 47 days and aggregates up to 15.83" (402mm) of snow.Daylight
In October, the average length of the day is 10h and 53min.On the first day of October, sunrise is at 7:09 am and sunset at 6:49 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 5:55 pm MDT.
Sunshine
In October, the average sunshine in Sumatra, Montana, is 6.4h.UV index
The average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: During October, 3 as the daily maximum UV index converts into the following advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Boost your sun resistance with garments that are densely woven yet spacious. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Sumatra, MT
- Average high temperature in October: 57.2°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 October: 41.4°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 October
Sumatra, MT
- Average pressure in October: 29.99"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 October
Sumatra, MT
- Average wind speed in October: 9.7mph
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 October
Sumatra, MT
- Average humidity in October: 55%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall in October
Sumatra, MT
- Average rainfall in October: 0.79"
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 October
Sumatra, MT
- Average rainfall days in October: 8.6 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 October
Sumatra, MT
- Average snowfall in October: 0.51"
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 October
Sumatra, MT
- Average snowfall days in October: 2 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 October /
Average sunshine in October
Sumatra, MT
- Average daylight in October: 10h and 54min
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 October: 6h and 24min
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 October
Sumatra, MT
- Average sunshine days in October: 18.9 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 October
Sumatra, MT
- Average UV index in October: 3
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 October
Sumatra, MT
- Average cloud cover in October: 30
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 October
Sumatra, MT
- Average visibility in October: 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).
