Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
A moderate decline in average high-temperatures is noted in September, moving from a warm 80.4°F (26.9°C) in August to a still moderately hot 73.9°F (23.3°C). Despite the hot September days, Lowell's nights see an average temperature plunge to a frosty 46.4°F (8°C).Humidity
In Lowell, the average relative humidity in September is 73%.Rainfall
In Lowell, in September, during 7.8 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Lowell, during the entire year, the rain falls for 158.1 days and collects up to 30.12" (765mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:35 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:53 pm PDT.
Sunshine
In Lowell, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 3 during September translates into these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Lowell have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Lowell, OR
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is December (46°F).
- Average low temperature in September: 46.4°F
The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (33.8°F).
Average pressure in September
Lowell, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Lowell, OR
- Average wind speed in September: 3.5mph
The windiest months (with the highest average wind speed) are January and March (4.4mph).
The calmest months (with the lowest average wind speed) are August and September (3.5mph).
Average humidity in September
Lowell, OR
- Average humidity in September: 73%
The months with the highest relative humidity are January, February, March and December (86%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Lowell, OR
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Lowell, OR
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is August (3.5 days).
Average snowfall in September
Lowell, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Lowell, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Lowell, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 1min
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 6min).
Average sunshine days in September
Lowell, OR
- Average sunshine days in September: 20.7 days
The month with the most sunshine days is August (25.6 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in September
Lowell, OR
- Average UV index in September: 3
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
Lowell, OR
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Lowell, OR
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, May, November and December (4mi).
Lowell, Oregon, USA
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