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 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
With the onset of September, Merced experiences a modest temperature adjustment, with the average high-temperature gently receding from a sweltering 97.9°F (36.6°C) in August to a hot 92.3°F (33.5°C). Merced, in the heat of September, registers a significant plunge to a mean of 62.2°F (16.8°C) during the nights.Humidity
The average relative humidity in September in Merced, California, is 36%.Rainfall
In Merced, during September, the rain falls for 2.5 days and regularly aggregates up to 0.12" (3mm) of precipitation. In Merced, during the entire year, the rain falls for 62.9 days and collects up to 11.69" (297mm) of precipitation.Daylight
In September, the average length of the day in Merced is 12h and 25min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:30 pm. On the last day of September, in Merced, sunrise is at 6:57 am and sunset at 6:46 pm PDT.
Sunshine
In Merced, the average sunshine in September is 11.4h.UV index
The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 6 during September leads to these advisories:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Merced in September?
What is the average humidity in September in Merced?
How many days does it rain in September in Merced?
What is the average length of the day in September in Merced?
When is the sunrise / sunset in September in Merced?
How many hours of sunshine does Merced have in September?
What is the UV index intensity in September in Merced?
Average temperature in September
Merced, CA
- Average high temperature in September: 92.3°F
The warmest month (with the highest average high temperature) is July (99.1°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in September
Merced, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Merced, CA
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is June (8.3mph).
The calmest months (with the lowest average wind speed) are January and November (5.2mph).
Average humidity in September
Merced, CA
- Average humidity in September: 36%
The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is July (32%).
Average rainfall in September
Merced, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is March (2.44").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in September
Merced, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is June (1.1 days).
Average daylight in September /
Average sunshine in September
Merced, CA
- Average daylight in September: 12h and 2min
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 2min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in September
Merced, CA
- Average sunshine days in September: 27.1 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (18.8 days).
Average UV index in September
Merced, 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, February, November and December (UV index 3).
Average cloud cover in September
Merced, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 32).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Merced, 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).
Merced, California, USA
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