September weather forecastMeriden, WY
September
Weather in September
The first month of the autumn, September, is still a warm month in Meriden, Wyoming, with an average temperature varying between 53.4°F (11.9°C) and 78.4°F (25.8°C).Temperature
As September commences, the average high-temperature subtly reduces, transitioning from a hot 86.5°F (30.3°C) in August to a moderately hot 78.4°F (25.8°C). In Meriden, the nighttime chill during September is a clear shift from the day's highs, with an average of 53.4°F (11.9°C).Humidity
August and September, with an average relative humidity of 46%, are the least humid months in Meriden, Wyoming.Rainfall
In Meriden, in September, during 7.9 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Meriden, during the entire year, the rain falls for 104.8 days and collects up to 13.35" (339mm) of precipitation.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. Throughout the year, there are 39 snowfall days, and 17.17" (436mm) of snow is accumulated.Daylight
In Meriden, the average length of the day in September is 12h and 28min.On the first day of September in Meriden, sunrise is at 6:24 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm MDT.
Sunshine
In Meriden, Wyoming, the average sunshine in September is 10.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 suggests this advice:
Make use of precautions - Suggestions to resist sunburn are communicated. It's recommended to limit sun exposure when its radiation is at its peak during midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Meriden, WY
- Average high temperature in September: 78.4°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in September
Meriden, WY
- Average pressure in September: 29.94"Hg
The months with the highest atmospheric pressure are January and December (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Meriden, WY
- Average wind speed in September: 9.5mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in September
Meriden, WY
- Average humidity in September: 46%
The month with the highest relative humidity is January (68%).
The months with the lowest relative humidity are August and September (46%).
Average rainfall in September
Meriden, WY
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Meriden, WY
- Average rainfall days in September: 7.9 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is December (3.5 days).
Average snowfall in September
Meriden, WY
- Average snowfall in September: 0.08"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Meriden, WY
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Meriden, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Meriden, WY
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Meriden, 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
Meriden, WY
- Average cloud cover in September: 17
The months with the most cloud cover are February and April (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Meriden, 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).
