September weather forecastEureka, NV
September
Weather in September
September marks a shift in the weather pattern with regard to both temperature and rainfall compared to August. The month captures the initial signs of change in season from summer to the beginnings of fall. As the temperatures begin to drop, the city sees a slight increase in rainfall. The alternating balance of warm and cool air in September paints a diverse weather picture. The gradual shortening of daylight hours marks the progression towards the colder months.Temperature
Eureka's average high-temperature decreases in September, falling from a moderately hot 81.9°F (27.7°C) in August to a pleasant 72.9°F (22.7°C). An average low-temperature of 52.2°F (11.2°C) marks the nights throughout September.Humidity
In September, the average relative humidity in Eureka, Nevada, is 31%.Rainfall
In September, in Eureka, the rain falls for 5.5 days. Throughout September, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 58.8 rainfall days, and 9.29" (236mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.5 snowfall days, it receives 0.51" (13mm) of snow. In Eureka, Nevada, during the entire year, snow falls for 48.1 days and aggregates up to 30.12" (765mm) of snow.Daylight
In September, the average length of the day in Eureka is 12h and 26min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:39 am and sunset at 6:27 pm PDT.
Sunshine
In Eureka, the average sunshine in September is 10.1h.UV index
In Eureka, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Stay sun-safe with clothing that is both closely woven and worn loosely. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Eureka, NV
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is December (33.3°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (17.8°F).
Average pressure in September
Eureka, NV
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Eureka, NV
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is January (6.3mph).
Average humidity in September
Eureka, NV
- Average humidity in September: 31%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (26%).
Average rainfall in September
Eureka, NV
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is March (1.26").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in September
Eureka, NV
- Average rainfall days in September: 5.5 days
The month with the highest number of rainy days is May (8.8 days).
The months with the least rainy days are January and February (2.3 days).
Average snowfall in September
Eureka, NV
- Average snowfall in September: 0.51"
The month with the highest snowfall is March (6.26").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Eureka, NV
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Eureka, NV
- Average daylight in September: 12h and 24min
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 24min).
- Average sunshine in September: 10h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in September
Eureka, NV
- Average sunshine days in September: 22.2 days
The month with the most sunshine days is October (25 days).
The month with the least sunshine days is April (18.1 days).
Average UV index in September
Eureka, NV
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Eureka, NV
- Average cloud cover in September: 13
The months with the most cloud cover are January, February and December (Cloud cover 38).
The months with the least cloud cover are August and September (Cloud cover 13).
Average visibility in September
Eureka, NV
- 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).
