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
Willows records a mild change in average high-temperature during September, easing from a hot 93.9°F (34.4°C) in August to a still tropical 87.4°F (30.8°C). Willows sees a major change from daytime highs, with the nighttime temperature dipping to a moderate 59.9°F (15.5°C) on average during September.Humidity
The months with the lowest humidity in Willows are July through September, with an average relative humidity of 35%.Rainfall
In Willows, during September, the rain falls for 2.2 days and regularly aggregates up to 0.12" (3mm) of precipitation. In Willows, 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.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:39 pm. On the last day of September, 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 Willows, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the least humid month?
What is the average humidity in September?
How many days does it rain in September in Willows?
When it does not snow?
How many hours of daylight does Willows have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Willows have in September?
What is the UV index reading in September?
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
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