September weather forecastEmerald, WA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Emerald, Washington, with an average temperature ranging between min 54.9°F (12.7°C) and max 75.4°F (24.1°C).Temperature
Emerald experiences a temperature shift at the start of September, with average high-temperatures adjusting from a hot 86.2°F (30.1°C) in August to a moderately hot 75.4°F (24.1°C). In September, Emerald's temperature tends to fall to an average low of 54.9°F (12.7°C) during the night.Humidity
In September, the average relative humidity in Emerald is 46%.Rainfall
In Emerald, in September, during 5.5 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In Emerald, during the entire year, the rain falls for 104.5 days and collects up to 8.23" (209mm) of precipitation.Snowfall
January through March, September, November and December are months with snowfall. September is the first month it typically snows in Emerald, Washington. Throughout September, in the average 0.1 snowfall days, it receives 0.2" (5mm) of snow. In Emerald, during the entire year, snow falls for 15.6 days and aggregates up to 7.36" (187mm) of snow.Daylight
In Emerald, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:21 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:41 pm PDT.
Sunshine
In Emerald, Washington, the average sunshine in September is 10.7h.UV index
In September, the average daily maximum UV index in Emerald is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Emerald, WA
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (36.1°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is December (25.3°F).
Average pressure in September
Emerald, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in September
Emerald, WA
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5mph).
Average humidity in September
Emerald, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in September
Emerald, WA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Emerald, WA
- Average rainfall days in September: 5.5 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (4.1 days).
Average snowfall in September
Emerald, WA
- Average snowfall in September: 0.2"
The month with the highest snowfall is December (2.24").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in September
Emerald, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (5 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Emerald, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in September
Emerald, WA
- Average sunshine days in September: 22.6 days
The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in September
Emerald, WA
- 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
Emerald, WA
- Average cloud cover in September: 17
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in September
Emerald, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
