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
September brings a decrease in the average high-temperature, falling from August's moderately hot 81.5°F (27.5°C) to a pleasant 71.8°F (22.1°C). Ukiah reports a consistent average low-temperature of 52.3°F (11.3°C) throughout September nights.Humidity
The average relative humidity in September is 48%.Rainfall
In Ukiah, Oregon, during September, the rain falls for 6.7 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 145.3 rainfall days, and 16.69" (424mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 30.7 snowfall days, and 15.51" (394mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:37 pm PDT.
Sunshine
The average sunshine in September is 10.5h.UV index
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: A maximum high daily UV index of 4 during September translates into the following directions:
Undertake precautions - Obligation exists to protect against skin and eye damage. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Ukiah, OR
- Average high temperature in September: 71.8°F
The warmest months (with the highest average high temperature) are July and August (81.5°F).
The month with the lowest average high temperature is December (36.7°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is August (59.5°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in September
Ukiah, OR
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in September
Ukiah, OR
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).
Average humidity in September
Ukiah, OR
- Average humidity in September: 48%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (41%).
Average rainfall in September
Ukiah, OR
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Ukiah, OR
- Average rainfall days in September: 6.7 days
The month with the highest number of rainy days is March (18.4 days).
The month with the least rainy days is August (3.5 days).
Average snowfall in September
Ukiah, OR
- Average snowfall in September: 0.12"
The month with the highest snowfall is February (5.24").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Ukiah, OR
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (8.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ukiah, 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 3min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Ukiah, OR
- Average sunshine days in September: 21.5 days
The month with the most sunshine days is August (24.8 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
Ukiah, 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
Ukiah, OR
- Average cloud cover in September: 18
The months with the most cloud cover are January and February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Ukiah, 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).
Ukiah, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location