September weather forecast and climate
Newark, CA

Weather in September

September, the first month of the autumn, in Newark, is also a moderately hot month, with average temperature fluctuating between 79.2°F (26.2°C) and 56.3°F (13.5°C).

Temperature

In Newark, the average high-temperature is relatively the same as in August - a still warm 79.2°F (26.2°C). In Newark, California, the average low-temperature is 56.3°F (13.5°C).

Humidity

Months with the lowest humidity are July and September, with an average relative humidity of 61%.

Rainfall

January through June, September through December are months with rainfall in Newark. September is the first month it rains. Throughout September, in the average 1.5 rainfall days, it receives 0.04" (1mm) of precipitation. Throughout the year, there are 43.5 rainfall days, and 2.36" (60mm) of precipitation is accumulated.

Daylight

In Newark, the average length of the day is 12.4h.

Sunshine

The average sunshine in Newark is 11.1h.

UV index

In Newark, California, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Newark?

In September, in Newark, California, the average high-temperature is 79.2°F (26.2°C), and the average low-temperature is 56.3°F (13.5°C).

What is the least humid month in Newark?

July and September, with an average relative humidity of 61%, are the least humid months.

What is the average humidity in September in Newark?

The average relative humidity in September is 61%.

When does it start raining in Newark?

September is the first month it rains. Throughout September, in the average 1.5 rainfall days, it receives 0.04" (1mm) of precipitation.

How many hours of daylight does Newark have in September?

In September, the average length of the day is 12.4h.

How long on average sun shines in September in Newark?

In Newark, the average sunshine in September is 11.1h.

How high is the UV index in September in Newark?

In Newark, California, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in September
Newark, CA

Average temperature in September - Newark, CA
  • Average high temperature in September: 79.2°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is December (56.5°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is August (56.8°F).
The coldest months (with the lowest average low temperature) are January, February and December (43.7°F).

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Average pressure in September
Newark, CA

Average pressure in September - Newark, CA
  • Average pressure in September: 29.92"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in September
Newark, CA

Average wind speed in September - Newark, CA
  • Average wind speed in September: 4.7mph

The windiest month (with the highest average wind speed) is May (6.2mph).
The calmest months (with the lowest average wind speed) are October and November (4.6mph).

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Average humidity in September
Newark, CA

Average humidity in September - Newark, CA
  • Average humidity in September: 61%

The month with the highest relative humidity is March (72%).
Months with the lowest relative humidity are July and September (61%).

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Average rainfall in September
Newark, CA

Average rainfall in September - Newark, CA
  • Average rainfall in September: 0.04"

The wettest months (with the highest rainfall) are February and March (0.47").
The driest months (with the least rainfall) are July and August (0").

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Average rainfall days in September
Newark, CA

Average rainfall days in September - Newark, CA
  • Average rainfall days in September: 1.5 days

The month with the highest number of rainy days is March (8.2 days).
The month with the least rainy days is July (0.3 days).

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

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

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 11.1h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.9h).

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Average sunshine days in September
Newark, CA

Average sunshine days in September - Newark, CA
  • Average sunshine days in September: 28.1 days

The month with the most sunshine days is July (30.5 days).
The month with the least sunshine days is February (21.3 days).

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Average UV index in September
Newark, CA

Average UV index in September - Newark, CA
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are February, November and December (UV index 3).

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Average cloud cover in September
Newark, CA

Average cloud cover in September - Newark, CA
  • Average cloud cover in September: 10

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in September
Newark, CA

Average visibility in September - Newark, 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).

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