September weather forecastRonald, WA
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Ronald, Washington, with an average temperature ranging between max 64.6°F (18.1°C) and min 42.3°F (5.7°C).Temperature
The onset of September coincides with a reduction in the average high-temperature, falling from a moderately hot 75.4°F (24.1°C) in August to a comfortable 64.6°F (18.1°C). September nights in Ronald showcase a dramatic shift from daytime highs to an average temperature of 42.3°F (5.7°C).Humidity
In September, the average relative humidity in Ronald is 68%.Rainfall
In September, the rain falls for 10.7 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. In Ronald, during the entire year, the rain falls for 161.2 days and collects up to 28.46" (723mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Ronald. Throughout September, in the average 0.2 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 69.9 snowfall days, and 60.24" (1530mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September in Ronald, sunrise is at 6:24 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:44 pm PDT.
Sunshine
The average sunshine in September in Ronald is 10.2h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Guard yourself - Avoiding sunburn is suggested. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ronald, WA
- Average high temperature in September: 64.6°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in September: 42.3°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (18.3°F).
Average pressure in September
Ronald, WA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in September
Ronald, WA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is June (6.7mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in September
Ronald, WA
- Average humidity in September: 68%
The months with the highest relative humidity are January and February (92%).
The months with the lowest relative humidity are July and August (60%).
Average rainfall in September
Ronald, WA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is January (4.41").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Ronald, WA
- Average rainfall days in September: 10.7 days
The months with the highest number of rainy days are March and April (18.3 days).
The month with the least rainy days is August (5.5 days).
Average snowfall in September
Ronald, WA
- Average snowfall in September: 0.2"
The month with the highest snowfall is January (16.3").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Ronald, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (15.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ronald, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 10h and 12min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Ronald, WA
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in September
Ronald, WA
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Ronald, WA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in September
Ronald, WA
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (3mi).
