September weather forecastGreenwich, UT
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Greenwich, Utah, with an average temperature ranging between max 67.6°F (19.8°C) and min 47.1°F (8.4°C).Temperature
In the transition to September, Greenwich observes a minor drop in the average high-temperature, shifting from a warm 74.3°F (23.5°C) in August to an enjoyable 67.6°F (19.8°C). Nighttime temperature in Greenwich lowers to an average of 47.1°F (8.4°C) in September.Humidity
In September, the average relative humidity in Greenwich, Utah, is 42%.Rainfall
In Greenwich, Utah, during September, the rain falls for 8.4 days and regularly aggregates up to 0.59" (15mm) of precipitation. Throughout the year, there are 71.2 rainfall days, and 9.84" (250mm) of precipitation is accumulated.Snowfall
Months with snowfall in Greenwich, Utah, are January through June, September through December. September is the first month it typically snows in Greenwich. Throughout September, in the average 0.5 snowfall days, it receives 0.16" (4mm) of snow. In Greenwich, during the entire year, snow falls for 64.4 days and aggregates up to 44.17" (1122mm) of snow.Daylight
In September, the average length of the day in Greenwich, Utah, is 12h and 25min.On the first day of the month, sunrise is at 6:57 am and sunset at 7:57 pm. On the last day of September, in Greenwich, Utah, sunrise is at 7:23 am and sunset at 7:11 pm MDT.
Sunshine
The average sunshine in September in Greenwich is 9.9h.UV index
In September, the average daily maximum UV index in Greenwich is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Be vigilant - A duty to shield skin and eyes from injury exists. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenwich, UT
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in September: 47.1°F
The month with the highest average low temperature is July (55°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in September
Greenwich, UT
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Greenwich, UT
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in September
Greenwich, UT
- Average humidity in September: 42%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is June (32%).
Average rainfall in September
Greenwich, UT
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is July (1.26").
The driest month (with the least rainfall) is June (0.43").
Average rainfall days in September
Greenwich, UT
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in September
Greenwich, UT
- Average snowfall in September: 0.16"
The month with the highest snowfall is March (8.07").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Greenwich, UT
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is December (11.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Greenwich, UT
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in September
Greenwich, UT
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in September
Greenwich, UT
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Greenwich, UT
- Average cloud cover in September: 12
The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 12).
Average visibility in September
Greenwich, UT
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
