September weather forecast and climate
Milpitas, CA

Weather in September

September, the first month of the autumn, in Milpitas, is still a warm month, with temperature in the range of an average low of 55.6°F (13.1°C) and an average high of 80.2°F (26.8°C).

Temperature

In Milpitas, California, the average high-temperature in September is almost the same as in August - a still moderately hot 80.2°F (26.8°C). The average low-temperature, in September, is 55.6°F (13.1°C).

Humidity

In Milpitas, California, the average relative humidity in September is 59%.

Rainfall

In Milpitas, California, during September, the rain falls for 2.2 days and regularly aggregates up to 0.08" (2mm) of precipitation. Throughout the year, there are 52.8 rainfall days, and 4.06" (103mm) of precipitation is accumulated.

Daylight

The average length of the day in Milpitas is 12.4h.

Sunshine

In Milpitas, the average sunshine in September is 11.2h.

UV index

The average daily maximum UV index in Milpitas is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Milpitas?

In September, the average high-temperature is 80.2°F (26.8°C), and the average low-temperature is 55.6°F (13.1°C).

What is the average humidity in September in Milpitas?

In September, the average relative humidity in Milpitas is 59%.

How much does it rain in Milpitas in September?

In Milpitas, California, during September, the rain falls for 2.2 days and regularly aggregates up to 0.08" (2mm) of precipitation.

What is the average length of the day in September in Milpitas?

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

How many hours of sunshine does Milpitas have in September?

In September, the average sunshine in Milpitas, California, is 11.2h.

How high is the UV index in September in Milpitas?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Milpitas, CA

Average temperature in September - Milpitas, CA
  • Average high temperature in September: 80.2°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (56.3°F).

  • Average low temperature in September: 55.6°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 and December (42.6°F).

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Average pressure in September
Milpitas, CA

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

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in September
Milpitas, CA

Average wind speed in September - Milpitas, CA
  • Average wind speed in September: 4.4mph

The windiest month (with the highest average wind speed) is May (5.8mph).
The calmest months (with the lowest average wind speed) are October and November (4.3mph).

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Average humidity in September
Milpitas, CA

Average humidity in September - Milpitas, CA
  • Average humidity in September: 59%

The month with the highest relative humidity is March (73%).
The month with the lowest relative humidity is July (58%).

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Average rainfall in September
Milpitas, CA

Average rainfall in September - Milpitas, CA
  • Average rainfall in September: 0.08"

The wettest month (with the highest rainfall) is March (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").

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Average rainfall days in September
Milpitas, CA

Average rainfall days in September - Milpitas, CA
  • Average rainfall days in September: 2.2 days

The month with the highest number of rainy days is March (9.9 days).
The month with the least rainy days is August (0.4 days).

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

Average daylight in September / Average sunshine in September - Milpitas, 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: 11.2h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average sunshine days in September
Milpitas, CA

Average sunshine days in September - Milpitas, CA
  • Average sunshine days in September: 26.8 days

The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is March (19.5 days).

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Average UV index in September
Milpitas, CA

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

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

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Average cloud cover in September
Milpitas, CA

Average cloud cover in September - Milpitas, 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 5).

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Average visibility in September
Milpitas, CA

Average visibility in September - Milpitas, 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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