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
In September, the average high-temperature decreases from a pleasant 70.7°F (21.5°C) in August to an enjoyable 61.2°F (16.2°C). Despite a significant disparity with daytime temperatures, an average low-temperature of 37.2°F (2.9°C) is recorded in Three River Junction during September.Humidity
In Three River Junction, the average relative humidity in September is 57%.Rainfall
In September, the rain falls for 8.5 days. Throughout September, 1.57" (40mm) of precipitation is accumulated. In Three River Junction, during the entire year, the rain falls for 94.6 days and collects up to 24.41" (620mm) of precipitation.Snowfall
January through December are months with snowfall in Three River Junction. In Three River Junction, in September, snow falls for 3.9 days, with typically accumulated 4.49" (114mm) of snow. Throughout the year, in Three River Junction, Wyoming, there are 176.8 snowfall days, and 135.55" (3443mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:47 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:05 pm MDT.
Sunshine
In September, the average sunshine is 9.9h.UV index
In Three River Junction, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the UV index of 2 transforms into the following advice:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
What is the average September temperature in Three River Junction?
What is the average humidity in September in Three River Junction?
How many days does it rain in September in Three River Junction?
How many days does it snow in September in Three River Junction?
How many hours of daylight does Three River Junction have in September?
What time are sunrise and sunset in September in Three River Junction?
How many hours of sunshine does Three River Junction have in September?
What is the UV index intensity in September in Three River Junction?
Average temperature in September
Three River Junction, WY
- Average high temperature in September: 61.2°F
The warmest month (with the highest average high temperature) is July (72.1°F).
The month with the lowest average high temperature is December (19.4°F).
- Average low temperature in September: 37.2°F
The month with the highest average low temperature is July (43.7°F).
The coldest month (with the lowest average low temperature) is December (3.9°F).
Average pressure in September
Three River Junction, WY
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Three River Junction, WY
- Average wind speed in September: 6.6mph
The windiest months (with the highest average wind speed) are February and June (7.4mph).
The calmest months (with the lowest average wind speed) are May and August (6.3mph).
Average humidity in September
Three River Junction, WY
- Average humidity in September: 57%
The month with the highest relative humidity is February (94%).
The months with the lowest relative humidity are July and August (50%).
Average rainfall in September
Three River Junction, WY
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is July (0.94").
Average rainfall days in September
Three River Junction, WY
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (2.2 days).
Average snowfall in September
Three River Junction, WY
- Average snowfall in September: 4.49"
The month with the highest snowfall is April (19.69").
The months with the least snowfall are July and August (0.08").
Average snowfall days in September
Three River Junction, WY
- Average snowfall days in September: 3.9 days
The month with the highest number of snowfall days is March (25.3 days).
The month with the least snowfall days is July (0.3 days).
Average daylight in September /
Average sunshine in September
Three River Junction, WY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 5min
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: 3h and 18min).
Average sunshine days in September
Three River Junction, WY
- Average sunshine days in September: 16 days
The month with the most sunshine days is September (16 days).
The month with the least sunshine days is April (4.5 days).
Average UV index in September
Three River Junction, WY
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Three River Junction, WY
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in September
Three River Junction, WY
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).
Three River Junction, Wyoming, USA
Weather forecast for your location
2. Allow the app to use your location
