October weather forecastRichland, WA
October
Weather in October
October stands as the herald of the fall season in Richland. It is characterized by shorter days, cooler temperatures, and the city turning into a picturesque canvas of oranges, browns, and yellows. The rainfall amount increases, reaching 0.63" (16mm), leaving a refreshing aroma in the air post showers. The city bathes in the warm hues of the setting sun earlier than in previous months. The decreasing number of sunshine hours indicates the onset of winters.Temperature
As September transitions into October, Richland sees a clear drop in the average high-temperature, declining from a warm 78.6°F (25.9°C) to an enjoyable 62.4°F (16.9°C). During October, the average low-temperature is recorded at a chilly 46.6°F (8.1°C).Humidity
In October, the average relative humidity is 57%.Rainfall
In Richland, in October, it is raining for 10 days, with typically 0.63" (16mm) of accumulated precipitation. Throughout the year, there are 100.2 rainfall days, and 7.05" (179mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in October is 10h and 53min.On the first day of the month, sunrise is at 6:56 am and sunset at 6:36 pm. On the last day of October, sunrise is at 7:38 am and sunset at 5:43 pm PDT.
Sunshine
In October, the average sunshine is 6.9h.UV index
In October, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 4 during October translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Richland, WA
- Average high temperature in October: 62.4°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (38.1°F).
- Average low temperature in October: 46.6°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (27.5°F).
Average pressure in October
Richland, WA
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in October
Richland, WA
- Average wind speed in October: 6.5mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5.6mph).
Average humidity in October
Richland, WA
- Average humidity in October: 57%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is July (35%).
Average rainfall in October
Richland, WA
- Average rainfall in October: 0.63"
The wettest month (with the highest rainfall) is December (0.94").
The driest months (with the least rainfall) are July and September (0.2").
Average rainfall days in October
Richland, WA
- Average rainfall days in October: 10 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in October
Richland, WA
- Average snowfall in October: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in October
Richland, WA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is December (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Richland, WA
- Average daylight in October: 10h and 54min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in October: 6h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in October
Richland, WA
- Average sunshine days in October: 19.4 days
The month with the most sunshine days is July (25.7 days).
The months with the least sunshine days are February and March (15.3 days).
Average UV index in October
Richland, WA
- Average UV index in October: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in October
Richland, WA
- Average cloud cover in October: 27
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in October
Richland, WA
- 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).
