September weather forecast
Seaside, CA

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Weather in September

September, the first month of the autumn in Seaside, is also an agreeable month, with an average temperature ranging between min 55.2°F (12.9°C) and max 72.5°F (22.5°C).

Temperature

Seaside's September weather reaches an average high of 72.5°F (22.5°C) and an average low of 55.2°F (12.9°C), making it the warmest month.

Humidity

The average relative humidity in September in Seaside is 72%.

Rainfall

In Seaside, in September, during 2.4 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In Seaside, during the entire year, the rain falls for 73.6 days and collects up to 11.77" (299mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 24min.
On the first day of the month, sunrise is at 6:39 am and sunset at 7:34 pm. On the last day of September, in Seaside, sunrise is at 7:02 am and sunset at 6:51 pm PDT.

Sunshine

In September, the average sunshine is 11.1h.

UV index

The months with the highest UV index in Seaside are June through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, an average UV index of 5 transforms into the following instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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Frequently asked questions

What is the hottest time of year in Seaside?

Seaside's warmest month, September, registers temperatures that range from a high of 72.5°F (22.5°C) to a low of 55.2°F (12.9°C).

What is the temperature in September in Seaside?

September temperatures in Seaside vary between a high-temperature of 72.5°F (22.5°C) and a low-temperature of 55.2°F (12.9°C).

What is the average humidity in September in Seaside?

In Seaside, the average relative humidity in September is 72%.

How much does it rain in Seaside in September?

In Seaside, California, in September, during 2.4 rainfall days, 0.12" (3mm) of precipitation is typically accumulated.

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

The average day length in September is 12h and 24min.

When are sunrise and sunset in September in Seaside?

On the first day of September, sunrise is at 6:39 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm PDT.

How long on average sun shines in September in Seaside?

In Seaside, California, the average sunshine duration in September is 11.1h.

What is the month with the highest UV index in Seaside?

The months with the highest UV index are June through September, with an average maximum UV index of 5.

What is the UV index reading in September in Seaside?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Seaside, CA

Average temperature in September - Seaside, CA
  • Average high temperature in September: 72.5°F

The warmest month (with the highest average high temperature) is September (72.5°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in September: 55.2°F

The months with the highest average low temperature are August and September (55.2°F).
The coldest month (with the lowest average low temperature) is February (46°F).

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Average pressure in September
Seaside, CA

Average pressure in September - Seaside, CA
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).

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Average wind speed in September
Seaside, CA

Average wind speed in September - Seaside, CA
  • Average wind speed in September: 5.7mph

The windiest months (with the highest average wind speed) are April and May (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in September
Seaside, CA

Average humidity in September - Seaside, CA
  • Average humidity in September: 72%

The months with the highest relative humidity are March and May (76%).
The month with the lowest relative humidity is November (68%).

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Average rainfall in September
Seaside, CA

Average rainfall in September - Seaside, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is December (2.4").
The driest months (with the least rainfall) are July and August (0.08").

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Average rainfall days in September
Seaside, CA

Average rainfall days in September - Seaside, CA
  • Average rainfall days in September: 2.4 days

The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (1.1 days).

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

Average daylight in September / Average sunshine in September - Seaside, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in September
Seaside, CA

Average sunshine days in September - Seaside, CA
  • Average sunshine days in September: 25.9 days

The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is March (16.8 days).

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Average UV index in September
Seaside, CA

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

The months with the highest UV index are June, July, August and September (UV index 5).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in September
Seaside, CA

Average cloud cover in September - Seaside, CA
  • Average cloud cover in September: 12

The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in September
Seaside, CA

Average visibility in September - Seaside, 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).

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Seaside, California, USA

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