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
Arrival of September comes with a reduction in the average high-temperature, falling from a moderately hot 82.2°F (27.9°C) in August to an agreeable 72.7°F (22.6°C). Ione cools down to an average low-temperature of 54.1°F (12.3°C) throughout the month of September.Humidity
In September, the average relative humidity in Ione is 47%.Rainfall
In Ione, in September, it is raining for 6.6 days, with typically 0.47" (12mm) of accumulated precipitation. In Ione, during the entire year, the rain falls for 131.9 days and collects up to 13.54" (344mm) of precipitation.Snowfall
Months with snowfall in Ione are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 31.3 snowfall days, and 18.54" (471mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:36 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:40 pm PDT.
Sunshine
In Ione, the average sunshine in September is 10.8h.UV index
In Ione, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Enhance your sun protection with tightly woven, yet airy clothing. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start to snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Ione, OR
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (37.9°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is August (60.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure in September
Ione, OR
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in September
Ione, OR
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is September (7.2mph).
Average humidity in September
Ione, OR
- Average humidity in September: 47%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (39%).
Average rainfall in September
Ione, OR
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Ione, OR
- Average rainfall days in September: 6.6 days
The month with the highest number of rainy days is March (17 days).
The month with the least rainy days is August (4.1 days).
Average snowfall in September
Ione, OR
- Average snowfall in September: 0.24"
The month with the highest snowfall is February (6.61").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Ione, OR
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (9.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ione, OR
- Average daylight in September: 12h and 3min
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: 10h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 5h and 18min).
Average sunshine days in September
Ione, OR
- Average sunshine days in September: 21.2 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (9.5 days).
Average UV index in September
Ione, OR
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Ione, OR
- Average cloud cover in September: 16
The months with the most cloud cover are January and February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in September
Ione, OR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Ione, Oregon, USA
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