September weather forecastNewark, CA
September
Weather in September
September, the first month of the autumn in Newark, is also a moderately hot month, with an average temperature ranging between min 56.3°F (13.5°C) and max 79.2°F (26.2°C).Temperature
Upon the onset of September, Newark witnesses an average high-temperature of a still moderately hot 79.2°F (26.2°C), showing a close resemblance to the prior month. Newark registers a significant reduction from the day's heat, with an average temperature drop to a refreshing 56.3°F (13.5°C) in September.Humidity
The months with the lowest humidity are July and September, with an average relative humidity of 61%.Rainfall
Months with rainfall are January through June, September through December. 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 September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 6:39 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September is 11.1h.UV index
In Newark, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: An average UV index of 5 in September transforms into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
Average pressure in September
Newark, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
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).
Average humidity in September
Newark, CA
- Average humidity in September: 61%
The month with the highest relative humidity is March (72%).
The months with the lowest relative humidity are July and September (61%).
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").
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).
Average daylight in September /
Average sunshine in September
Newark, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 6min
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 54min).
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).
Average UV index in September
Newark, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).
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).
Average visibility in September
Newark, 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).
