Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September signifies a minor drop in average high-temperature, transitioning from a tropical 88.5°F (31.4°C) in August to a moderately hot 80.2°F (26.8°C). In September, Green River's temperature tends to fall to an average low of 61.7°F (16.5°C) during the night.Humidity
In Green River, the average relative humidity in September is 30%.Rainfall
In Green River, during September, the rain falls for 6.3 days and regularly aggregates up to 0.51" (13mm) of precipitation. In Green River, during the entire year, the rain falls for 72.7 days and collects up to 5.28" (134mm) of precipitation.Snowfall
April through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:50 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:04 pm MDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Green River have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Green River have in September?
What is the UV index intensity in September?
Average temperature in September
Green River, UT
- Average high temperature in September: 80.2°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in September
Green River, UT
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Green River, UT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is January (3.5mph).
Average humidity in September
Green River, UT
- Average humidity in September: 30%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is June (21%).
Average rainfall in September
Green River, UT
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is July (0.75").
The driest month (with the least rainfall) is April (0.24").
Average rainfall days in September
Green River, UT
- Average rainfall days in September: 6.3 days
The month with the highest number of rainy days is July (9.1 days).
The month with the least rainy days is November (3.8 days).
Average snowfall in September
Green River, UT
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.93").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Green River, UT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Green River, UT
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in September
Green River, UT
- Average sunshine days in September: 20.4 days
The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (14.8 days).
Average UV index in September
Green River, UT
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Green River, UT
- Average cloud cover in September: 10
The month with the most cloud cover is January (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 10).
Average visibility in September
Green River, UT
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Green River, Utah, USA
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