October weather forecast
Pomona, CA

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Trails in the rural mountainous region of Pomona, California, with scenic slopes and dense population down below
Trails in the rural mountainous region of Pomona, California, with scenic slopes and dense population down below

Weather in October

October's arrival prompts Pomona to brace itself for the onset of fall. The shift in weather parameters is more pronounced as temperatures continue to lower, creating a soothing contrast to the hot summer months. The change in wind patterns and pressure data indicate the steadily progressing seasonal change. Despite the prominent dip in light hours, sightseeing still proves pleasant under the clear autumn sky. The unique warmth of October's sunny days along with cool, crisp nights personifies Pomona's enticing autumn weather.

Temperature

The transition to October in Pomona results in a modest reduction in average high-temperature, moving from a hot 87.6°F (30.9°C) in September to a moderately hot 79.5°F (26.4°C). During October, the temperature tends to dip to an average of 58.6°F (14.8°C) at night.

Humidity

The average relative humidity in October is 47%.

Rainfall

In Pomona, in October, during 2.8 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. Throughout the year, in Pomona, there are 48 rainfall days, and 7.52" (191mm) of precipitation is accumulated.

Snowfall

In Pomona, California, snow does not fall in January, March through December.

Daylight

In October, the average length of the day is 11h and 19min.
On the first day of October, sunrise is at 6:46 am and sunset at 6:34 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:58 pm PDT.

Sunshine

The average sunshine in October is 8.8h.

UV index

The average daily maximum UV index in October in Pomona is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 5 during October leads to these instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

What are the temperatures in Pomona in October?

During October, Pomona experiences an average high-temperature of 79.5°F (26.4°C) and a low-temperature of 58.6°F (14.8°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is evaluated at 89.6°F (32°C).

What is the average humidity in October in Pomona?

In Pomona, the average relative humidity in October is 47%.

How many days does it rain in October in Pomona?

In Pomona, during October, the rain falls for 2.8 days and regularly aggregates up to 0.2" (5mm) of precipitation.

When it does not snow in Pomona?

January, March through December are months without snowfall in Pomona.

What is the average length of the day in October in Pomona?

In Pomona, the average day length in October is 11h and 19min.

What time are sunrise and sunset in October in Pomona?

In October, on the first day of the month, sunrise is at 6:46 am and sunset at 6:34 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:58 pm PDT.

How many hours of sunshine does Pomona have in October?

In October, the average sunshine duration is 8.8h.

What is the UV index reading in October in Pomona?

The average daily maximum UV index in October in Pomona is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Pomona, CA

Average temperature in October - Pomona, CA
  • Average high temperature in October: 79.5°F

The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is December (63.1°F).

  • Average low temperature in October: 58.6°F

The month with the highest average low temperature is August (65.7°F).
The coldest months (with the lowest average low temperature) are February and December (46.8°F).

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Average pressure in October
Pomona, CA

Average pressure in October - Pomona, CA
  • Average pressure in October: 29.94"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in October
Pomona, CA

Average wind speed in October - Pomona, CA
  • Average wind speed in October: 4.6mph

The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in October
Pomona, CA

Average humidity in October - Pomona, CA
  • Average humidity in October: 47%

The month with the highest relative humidity is May (56%).
The months with the lowest relative humidity are August and November (45%).

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Average rainfall in October
Pomona, CA

Average rainfall in October - Pomona, CA
  • Average rainfall in October: 0.2"

The wettest months (with the highest rainfall) are February and December (1.65").
The driest months (with the least rainfall) are June and August (0.04").

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Average rainfall days in October
Pomona, CA

Average rainfall days in October - Pomona, CA
  • Average rainfall days in October: 2.8 days

The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (0.8 days).

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Average snowfall days in October
Pomona, CA

Average snowfall days in October - Pomona, CA
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in October /
Average sunshine in October
Pomona, CA

Average daylight in October / Average sunshine in October - Pomona, CA
  • Average daylight in October: 11h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in October: 8h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).

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Average sunshine days in October
Pomona, CA

Average sunshine days in October - Pomona, CA
  • Average sunshine days in October: 26.5 days

The month with the most sunshine days is June (28.7 days).
The month with the least sunshine days is February (21.1 days).

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Average UV index in October
Pomona, CA

Average UV index in October - Pomona, CA
  • Average UV index in October: 5

The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in October
Pomona, CA

Average cloud cover in October - Pomona, CA
  • Average cloud cover in October: 9

The months with the most cloud cover are February, March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in October
Pomona, CA

Average visibility in October - Pomona, CA
  • Average visibility in October: 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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Pomona, California, USA

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