September weather forecastLost Springs, WY
September
Weather in September
The first month of the autumn, September, is still a warm month in Lost Springs, Wyoming, with an average temperature fluctuating between 54°F (12.2°C) and 75.9°F (24.4°C).Temperature
September's arrival subtly correlates with a reduction in the average high-temperature, down from 84.4°F (29.1°C) in August to a still warm 75.9°F (24.4°C). September nights present a sharp contrast to daytime highs, with average temperatures of 54°F (12.2°C).Humidity
In September, the average relative humidity is 42%.Rainfall
In September, the rain falls for 7.3 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. Throughout the year, there are 84.9 rainfall days, and 9.61" (244mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.08" (2mm) of snow. In Lost Springs, during the entire year, snow falls for 43 days and aggregates up to 17.64" (448mm) of snow.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Lost Springs, sunrise is at 6:25 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:42 pm MDT.
Sunshine
The average sunshine in September is 10.8h.UV index
In September, the average daily maximum UV index in Lost Springs is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Ensure safety - Sun damage prevention is strongly urged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. 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. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lost Springs, WY
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (33.8°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (19.2°F).
Average pressure in September
Lost Springs, WY
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Lost Springs, WY
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in September
Lost Springs, WY
- Average humidity in September: 42%
The month with the highest relative humidity is February (70%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Lost Springs, WY
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in September
Lost Springs, WY
- Average rainfall days in September: 7.3 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Lost Springs, WY
- Average snowfall in September: 0.08"
The month with the highest snowfall is November (2.8").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Lost Springs, WY
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (8.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lost Springs, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in September
Lost Springs, WY
- Average sunshine days in September: 19.9 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is April (14.5 days).
Average UV index in September
Lost Springs, WY
- Average UV index in September: 4
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
Lost Springs, WY
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Lost Springs, WY
- 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).
