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 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 modest decline in the average high-temperature is seen during September, decreasing from 93.9°F (34.4°C) in August to a still hot 87.4°F (30.8°C). Throughout September nights, a significant departure from daytime temperatures, with an average low of 59.9°F (15.5°C), is recognized in Willows.Humidity
The months with the lowest humidity in Willows, California, are July through September, with an average relative humidity of 35%.Rainfall
In September, the rain falls for 2.2 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. In Willows, California, during the entire year, the rain falls for 71.4 days and collects up to 14.02" (356mm) of precipitation.Snowfall
February through November are months without snowfall in Willows, California.Daylight
In September, the average length of the day in Willows is 12h and 26min.On the first day of September in Willows, sunrise is at 6:37 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September is 11.2h.UV index
In September, the average daily maximum UV index in Willows, California, is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 translates into these guidelines:
Act with care - The suggestion to avoid sunburn is emphasized. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
How hot does it get in Willows in September?
What are the least humid months in Willows?
What is the average humidity in September in Willows?
How many days does it rain in September in Willows?
When it does not snow in Willows?
What is the average length of the day in September in Willows?
When is the sunrise / sunset in September in Willows?
How many hours of sunshine does Willows have in September?
How high is the UV index in September in Willows?
Average temperature in September
Willows, CA
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is July (95.4°F).
The month with the lowest average high temperature is December (52.7°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (39.4°F).
Average pressure in September
Willows, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, July and August (29.91"Hg).
Average wind speed in September
Willows, CA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Willows, CA
- Average humidity in September: 35%
The month with the highest relative humidity is March (69%).
The months with the lowest relative humidity are July, August and September (35%).
Average rainfall in September
Willows, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (2.68").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in September
Willows, CA
- Average rainfall days in September: 2.2 days
The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is July (1 days).
Average snowfall in September
Willows, CA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.9").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average daylight in September /
Average sunshine in September
Willows, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Willows, CA
- Average sunshine days in September: 27.3 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (17 days).
Average UV index in September
Willows, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Willows, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Willows, CA
- 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).
Willows, California, USA
Weather forecast for your location
2. Allow the app to use your location
