October weather forecast
Riverdale, CA

Weather in October

October, the same as September, is a moderately hot autumn month in Riverdale, California, with an average temperature varying between 80.4°F (26.9°C) and 56.5°F (13.6°C).

Temperature

In Riverdale, California, the average high-temperature in October decreases from a hot 94.1°F (34.5°C) in September to a moderately hot 80.4°F (26.9°C). In October, in Riverdale, the average low-temperature is 56.5°F (13.6°C).

Humidity

The average relative humidity in October in Riverdale is 43%.

Rainfall

In Riverdale, in October, it is raining for 3.4 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, in Riverdale, there are 58.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.

Daylight

The average length of the day in October in Riverdale is 11h and 14min.
On the first day of October, sunrise is at 6:54 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 6:04 pm PDT.

Sunshine

The average sunshine in October in Riverdale, California, is 7.9h.

UV index

In October, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 in October interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in October in Riverdale?

In Riverdale, in October, the average high-temperature is 80.4°F (26.9°C), and the average low-temperature is 56.5°F (13.6°C). in May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is computed to be 82.4°F (28°C).

What is the average humidity in October in Riverdale?

The average relative humidity in October in Riverdale, California, is 43%.

How many days does it rain in October in Riverdale?

In Riverdale, in October, during 3.4 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.

How many hours of daylight does Riverdale have in October?

In October, the average day length is 11h and 14min.

What time are sunrise and sunset in October in Riverdale?

In October, on the first day of the month, sunrise is at 6:54 am and sunset at 6:43 pm. On the last day of the month, in Riverdale, sunrise is at 7:21 am and sunset at 6:04 pm PDT.

How many hours of sunshine does Riverdale have in October?

The average sunshine duration in October in Riverdale is 7.9h.

What is the UV index intensity in October in Riverdale?

In Riverdale, California, the average daily maximum UV index in October is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Riverdale, CA

Average temperature in October - Riverdale, CA
  • Average high temperature in October: 80.4°F

The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).

  • Average low temperature in October: 56.5°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure in October
Riverdale, CA

Average pressure in October - Riverdale, CA
  • Average pressure in October: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in October
Riverdale, CA

Average wind speed in October - Riverdale, CA
  • Average wind speed in October: 5.4mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).

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Average humidity in October
Riverdale, CA

Average humidity in October - Riverdale, CA
  • Average humidity in October: 43%

The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).

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Average rainfall in October
Riverdale, CA

Average rainfall in October - Riverdale, CA
  • Average rainfall in October: 0.47"

The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").

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Average rainfall days in October
Riverdale, CA

Average rainfall days in October - Riverdale, CA
  • Average rainfall days in October: 3.4 days

The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).

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

Average daylight in October / Average sunshine in October - Riverdale, CA
  • Average daylight in October: 11h and 14min

The month with the longest days is June (Average daylight: 14h and 37min).
The month with the shortest days is December (Average daylight: 9h and 43min).

  • Average sunshine in October: 7h and 54min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in October
Riverdale, CA

Average sunshine days in October - Riverdale, CA
  • Average sunshine days in October: 27 days

The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).

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Average UV index in October
Riverdale, CA

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

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

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Average cloud cover in October
Riverdale, CA

Average cloud cover in October - Riverdale, CA
  • Average cloud cover in October: 11

The months with the most cloud cover are March and December (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 4).

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Average visibility in October
Riverdale, CA

Average visibility in October - Riverdale, 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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