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 slight decrease in the average high-temperature, shifting from a moderately hot 85.3°F (29.6°C) in August to a still warm 79.9°F (26.6°C). The month of September sees a significant daily temperature drop, recording an average low-temperature of 54°F (12.2°C).Humidity
In Pioneer, the average relative humidity in September is 39%.Rainfall
In September, the rain falls for 3.5 days. Throughout September, 0.31" (8mm) of precipitation is accumulated. Throughout the year, there are 78.6 rainfall days, and 31.18" (792mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:32 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:46 pm PDT.
Sunshine
In September, the average sunshine is 11.3h.UV index
In Pioneer, 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 average maximum UV index of 4 translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When 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
Pioneer, CA
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (48.6°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (57.4°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in September
Pioneer, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Pioneer, CA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (6.2mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Pioneer, CA
- Average humidity in September: 39%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and August (37%).
Average rainfall in September
Pioneer, CA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is March (6.14").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in September
Pioneer, CA
- Average rainfall days in September: 3.5 days
The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (1.8 days).
Average snowfall in September
Pioneer, CA
- Average snowfall in September: 0"
The month with the highest snowfall is March (18.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Pioneer, CA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is March (6.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Pioneer, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Pioneer, CA
- Average sunshine days in September: 25.7 days
The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (14.3 days).
Average UV index in September
Pioneer, CA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in September
Pioneer, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 37).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Pioneer, 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).
Pioneer, California, USA
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