September weather forecast and climate
Pioneer, CA

Weather in September

The first month of the autumn, September, is also a moderately hot month in Pioneer, California, with average temperature fluctuating between 54°F (12.2°C) and 79.9°F (26.6°C).

Temperature

In Pioneer, the average high-temperature slightly decreases, from 85.3°F (29.6°C) in August, to a still moderately hot 79.9°F (26.6°C). In Pioneer, in September, the average low-temperature is 54°F (12.2°C).

Humidity

In Pioneer, the average relative humidity in September is 39%.

Rainfall

In Pioneer, California, it is raining for 3.5 days, with typically 0.31" (8mm) of accumulated precipitation. Throughout the year, in Pioneer, 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 Pioneer, California, is 12.4h.

Sunshine

In Pioneer, the average sunshine is 11.3h.

UV index

In Pioneer, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the temperature in September in Pioneer?

In September, in Pioneer, California, the average high-temperature is 79.9°F (26.6°C), and the average low-temperature is 54°F (12.2°C).

What is the average humidity in September in Pioneer?

In Pioneer, California, the average relative humidity in September is 39%.

How much does it rain in Pioneer in September?

In September, in Pioneer, California, the rain falls for 3.5 days. Throughout September, 0.31" (8mm) of precipitation is accumulated.

Does it snow in Pioneer in September?

In Pioneer, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Pioneer?

June through September are months without snowfall in Pioneer, California.

How many hours of daylight does Pioneer have in September?

The average length of the day in September in Pioneer is 12.4h.

How many hours of sunshine does Pioneer have in September?

In September, the average sunshine is 11.3h.

How high is the UV index in September in Pioneer?

In September, the average daily maximum UV index in Pioneer, California, is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Pioneer, CA

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).

[Resources]

Average pressure in September
Pioneer, CA

Average pressure in September - Pioneer, CA
  • Average pressure in September: 29.93"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.91").

[Resources]

Average wind speed in September
Pioneer, CA

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).

[Resources]

Average humidity in September
Pioneer, CA

Average humidity in September - Pioneer, CA
  • Average humidity in September: 39%

The month with the highest relative humidity is March (74%).
Months with the lowest relative humidity are July and August (37%).

[Resources]

Average rainfall in September
Pioneer, CA

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").

[Resources]

Average rainfall days in September
Pioneer, CA

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).

[Resources]

Average snowfall in September
Pioneer, CA

Average snowfall in September - Pioneer, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (18.98").
Months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in September
Pioneer, CA

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).
Months with the least snowfall days are June, July and August (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Pioneer, CA

Average daylight in September / Average sunshine in September - Pioneer, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 11.3h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 5.9h).

[Resources]

Average sunshine days in September
Pioneer, CA

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).

[Resources]

Average UV index in September
Pioneer, CA

Average UV index in September - Pioneer, CA
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are February, November and December (UV index 2).

[Resources]

Average cloud cover in September
Pioneer, CA

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).
Months with the least cloud cover are July and August (Cloud cover 5).

[Resources]

Average visibility in September
Pioneer, CA

Average visibility in September - Pioneer, CA
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]