September weather forecastNewberg, OR
September
Weather in September
September marks the end of summer and hints at the onset of autumn in Newberg. The city continues to enjoy clear skies and warm temperatures, although slowly welcoming the chill of the changing season. September's declining daylight hours foreshadow the approaching winter's short days. Though not as dry as previous months, rainfall during September does not exceed 1.38" (35mm) on average, maintaining the comfortable dry spell. A crisp wind of an average maximum speed of 4.3mph (6.9km/h) heralds a change, whispering tales of falling leaves and cooled air in the days to come.Temperature
In Newberg, the average high-temperature in September slightly decreases from a moderately hot 82°F (27.8°C) in August to a still warm 74.3°F (23.5°C). Newberg experiences a dramatic descent in temperature during September, with the average nighttime reading settling at a fresh 51.6°F (10.9°C).Humidity
The average relative humidity in September is 70%.Rainfall
In September, the rain falls for 10.8 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. In Newberg, during the entire year, the rain falls for 169.4 days and collects up to 27.36" (695mm) of precipitation.Snowfall
In Newberg, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:53 pm PDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Newberg, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Newberg, OR
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in September
Newberg, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Newberg, OR
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are June and August (4.2mph).
Average humidity in September
Newberg, OR
- Average humidity in September: 70%
The months with the highest relative humidity are February and December (86%).
The month with the lowest relative humidity is August (64%).
Average rainfall in September
Newberg, OR
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is December (4.13").
The driest month (with the least rainfall) is August (0.31").
Average rainfall days in September
Newberg, OR
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.4 days).
Average snowfall in September
Newberg, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Newberg, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Newberg, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in September
Newberg, OR
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.8 days).
Average UV index in September
Newberg, OR
- 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, November and December (UV index 2).
Average cloud cover in September
Newberg, OR
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Newberg, OR
- Average visibility in September: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
