September weather forecast and climate
Merced, CA

Weather in September

September, the first month of the autumn, in Merced, is still a hot month, with average temperature varying between 62.2°F (16.8°C) and 92.3°F (33.5°C).

Temperature

In Merced, California, the average high-temperature in September marginally drops, from a sweltering 97.9°F (36.6°C) in August, to a hot 92.3°F (33.5°C). In September, the average low-temperature is 62.2°F (16.8°C).

Humidity

In Merced, California, the average relative humidity in September 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 12.4h.

Sunshine

The average sunshine in September is 11.4h.

UV index

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Merced?

In Merced, in September, the average high-temperature is 92.3°F (33.5°C), and the average low-temperature is 62.2°F (16.8°C).

What is the average humidity in September in Merced?

The average relative humidity in September in Merced, California, is 36%.

How much does it rain in Merced in September?

In Merced, during September, the rain falls for 2.5 days and regularly aggregates up to 0.12" (3mm) of precipitation.

How many hours of daylight does Merced have in September?

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

How long on average sun shines in September in Merced?

In September, the average sunshine in Merced, California, is 11.4h.

What is the UV index reading in September in Merced?

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.

Average temperature in September
Merced, CA

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).

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Average pressure in September
Merced, CA

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

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in September
Merced, CA

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).

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Average humidity in September
Merced, CA

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%).

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Average rainfall in September
Merced, CA

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").

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Average rainfall days in September
Merced, CA

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).

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

Average daylight in September / Average sunshine in September - Merced, 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: 11.4h

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.1h).

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Average sunshine days in September
Merced, CA

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).

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Average UV index in September
Merced, CA

Average UV index in September - Merced, CA
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Merced, CA

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

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Average visibility in September
Merced, CA

Average visibility in September - Merced, 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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