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
A decrease in the average high-temperature is observed in Lander during September, shifting from a warm 79.5°F (26.4°C) in August to an agreeable 70.3°F (21.3°C). Lander records a significant temperature drop in September nights, lowering to an average of 48.6°F (9.2°C).Humidity
The average relative humidity in September is 38%.Rainfall
In September, in Lander, the rain falls for 6.1 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. Throughout the year, in Lander, there are 92.3 rainfall days, and 9.92" (252mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. In Lander, during the entire year, snow falls for 56.6 days and aggregates up to 39.65" (1007mm) of snow.Daylight
The average length of the day in September in Lander is 12h and 29min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:57 pm MDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Guard yourself - Precautionary measures against sun damage are advocated. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What are the temperatures in Lander in September?
What is the average humidity in September in Lander?
How much does it rain in Lander in September?
When does it start snowing in Lander?
How many hours of daylight does Lander have in September?
When is the sunrise / sunset in September in Lander?
How long on average sun shines in September in Lander?
What is the UV index reading in September in Lander?
Average temperature in September
Lander, WY
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in September
Lander, WY
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Lander, WY
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Lander, WY
- Average humidity in September: 38%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (34%).
Average rainfall in September
Lander, WY
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is April (1.81").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Lander, WY
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is November (4.8 days).
Average snowfall in September
Lander, WY
- Average snowfall in September: 0.08"
The month with the highest snowfall is April (8.15").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Lander, WY
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lander, WY
- Average daylight in September: 12h and 3min
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 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 54min).
Average sunshine days in September
Lander, WY
- Average sunshine days in September: 21.6 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in September
Lander, WY
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Lander, WY
- Average cloud cover in September: 13
The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Lander, 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).
Lander, Wyoming, USA
Weather forecast for your location
2. Allow the app to use your location
