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
With September's onset, the weather in Grants Pass reveals a slight temperature decrease, transitioning from a moderately hot 84.7°F (29.3°C) in August to a still warm 77.4°F (25.2°C). Grants Pass experiences a dramatic descent in temperature during September, with the average nighttime reading settling at a chilly 45°F (7.2°C).Humidity
In September, the average relative humidity is 67%.Rainfall
In Grants Pass, Oregon, in September, during 5.3 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In Grants Pass, during the entire year, the rain falls for 135.3 days and collects up to 23.54" (598mm) of precipitation.Snowfall
May through October are months without snowfall in Grants Pass.Daylight
In Grants Pass, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:46 pm. On the last day of September, in Grants Pass, sunrise is at 7:10 am and sunset at 6:55 pm PDT.
Sunshine
In September, the average sunshine is 10.4h.UV index
In Grants Pass, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 4 suggests this advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What are September temperatures in Grants Pass?
What is the average humidity in September in Grants Pass?
How many days does it rain in September in Grants Pass?
When it does not snow in Grants Pass?
What is the average length of the day in September in Grants Pass?
When is the sunrise / sunset in September in Grants Pass?
How long on average sun shines in September in Grants Pass?
What is the UV index reading in September in Grants Pass?
Average temperature in September
Grants Pass, OR
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (46°F).
- Average low temperature in September: 45°F
The month with the highest average low temperature is August (49.1°F).
The coldest month (with the lowest average low temperature) is December (31.5°F).
Average pressure in September
Grants Pass, OR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in September
Grants Pass, OR
- Average wind speed in September: 3.3mph
The windiest month (with the highest average wind speed) is March (4mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in September
Grants Pass, OR
- Average humidity in September: 67%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (63%).
Average rainfall in September
Grants Pass, OR
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is December (4.02").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Grants Pass, OR
- Average rainfall days in September: 5.3 days
The month with the highest number of rainy days is March (18.7 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in September
Grants Pass, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Grants Pass, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 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
Grants Pass, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Grants Pass, OR
- Average sunshine days in September: 23.9 days
The month with the most sunshine days is July (26.7 days).
The month with the least sunshine days is March (10.8 days).
Average UV index in September
Grants Pass, 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
Grants Pass, OR
- Average cloud cover in September: 23
The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Grants Pass, OR
- Average visibility in September: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Grants Pass, Oregon, USA
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