September weather forecastStoneham, CO
September
Weather in September
September, the first month of the autumn in Stoneham, is also a moderately hot month, with an average temperature ranging between max 78.8°F (26°C) and min 56.3°F (13.5°C).Temperature
September's onset brings a negligible change in high-temperatures, falling from a hot 86.2°F (30.1°C) in August to a warm 78.8°F (26°C). Nighttime temperatures exhibit a substantial dip from daytime highs during September, averaging at a mild 56.3°F (13.5°C).Humidity
With an average relative humidity of 47%, September is the least humid month in Stoneham.Rainfall
In September, the rain falls for 10.1 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, there are 123.2 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
In Stoneham, snow does not fall in June through September.Daylight
In Stoneham, the average length of the day in September is 12h and 27min.On the first day of September in Stoneham, sunrise is at 6:22 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:37 pm MDT.
Sunshine
The average sunshine in September is 10.3h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Enhance your sun protection with tightly woven, yet airy clothing. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Stoneham, CO
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (37.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is December (23°F).
Average pressure in September
Stoneham, CO
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Stoneham, CO
- Average wind speed in September: 9.5mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (9mph).
Average humidity in September
Stoneham, CO
- Average humidity in September: 47%
The month with the highest relative humidity is January (65%).
The month with the lowest relative humidity is September (47%).
Average rainfall in September
Stoneham, CO
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Stoneham, CO
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in September
Stoneham, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.68").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Stoneham, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Stoneham, CO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 18min
The months with the most sunshine are June and August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Stoneham, CO
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Stoneham, CO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Stoneham, CO
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Stoneham, CO
- Average visibility in September: 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).
