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
The transition to September results in a modest reduction in average high-temperature, moving from a sweltering 95.7°F (35.4°C) in August to a hot 90°F (32.2°C). Edison, in the heat of September, registers a significant plunge to a mean of 61.2°F (16.2°C) during the nights.Humidity
In September, the average relative humidity in Edison is 33%.Rainfall
In September, in Edison, the rain falls for 1.6 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. Throughout the year, there are 52 rainfall days, and 7.17" (182mm) of precipitation is accumulated.Snowfall
In Edison, snow does not fall in January, March through December.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:21 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:40 pm PDT.
Sunshine
The average sunshine in September is 11.1h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September in Edison?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September in Edison?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Edison, CA
- Average high temperature in September: 90°F
The warmest month (with the highest average high temperature) is July (96.6°F).
The month with the lowest average high temperature is December (58.1°F).
- Average low temperature in September: 61.2°F
The months with the highest average low temperature are July and August (64.9°F).
The coldest month (with the lowest average low temperature) is December (40.8°F).
Average pressure in September
Edison, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Edison, CA
- Average wind speed in September: 4.3mph
The windiest months (with the highest average wind speed) are May, June and July (5mph).
The calmest month (with the lowest average wind speed) is November (3.9mph).
Average humidity in September
Edison, CA
- Average humidity in September: 33%
The months with the highest relative humidity are February and December (59%).
The month with the lowest relative humidity is August (29%).
Average rainfall in September
Edison, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (1.26").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
Edison, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (9.4 days).
The month with the least rainy days is August (0.8 days).
Average snowfall in September
Edison, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Edison, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Edison, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The months with the least sunshine are January and December (Average sunshine: 6h and 42min).
Average sunshine days in September
Edison, CA
- Average sunshine days in September: 27.6 days
The month with the most sunshine days is August (29.1 days).
The month with the least sunshine days is February (20.2 days).
Average UV index in September
Edison, CA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in September
Edison, CA
- Average cloud cover in September: 4
The month with the most cloud cover is March (Cloud cover 25).
The months with the least cloud cover are August and September (Cloud cover 4).
Average visibility in September
Edison, 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).
Edison, California, USA
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