Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
During the transition into October, Sumas observes a decrease in the average high-temperature, falling from a comfortable 66.7°F (19.3°C) in September to a still refreshing 56.1°F (13.4°C). During the month of October, an average low-temperature of 42.3°F (5.7°C) is recorded in Sumas, Washington.Humidity
In Sumas, the average relative humidity in October is 82%.Rainfall
In Sumas, in October, it is raining for 17.1 days, with typically 5.35" (136mm) of accumulated precipitation. Throughout the year, there are 188 rainfall days, and 49.88" (1267mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Sumas.Daylight
In October, the average length of the day in Sumas is 10h and 46min.On the first day of the month, sunrise is at 7:09 am and sunset at 6:46 pm. On the last day of October, sunrise is at 7:56 am and sunset at 5:49 pm PDT.
Sunshine
In October, the average sunshine in Sumas, Washington, is 5.1h.UV index
The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: In October, an average UV index of 2 transforms into the following instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Sumas in October?
What is the average humidity in October in Sumas?
How much does it rain in Sumas in October?
When it does not snow in Sumas?
Does it snow in Sumas in October?
What is the average length of the day in October in Sumas?
When are sunrise and sunset in October in Sumas?
How long on average sun shines in October in Sumas?
When is the lowest UV index in Sumas?
What is the UV index reading in October in Sumas?
Average temperature in October
Sumas, WA
- Average high temperature in October: 56.1°F
The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is December (39.6°F).
- Average low temperature in October: 42.3°F
The month with the highest average low temperature is August (51.4°F).
The coldest months (with the lowest average low temperature) are February and December (31.6°F).
Average pressure in October
Sumas, WA
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March and August (30"Hg).
Average wind speed in October
Sumas, WA
- Average wind speed in October: 3.9mph
The windiest months (with the highest average wind speed) are January and February (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in October
Sumas, WA
- Average humidity in October: 82%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is July (73%).
Average rainfall in October
Sumas, WA
- Average rainfall in October: 5.35"
The wettest month (with the highest rainfall) is November (7.72").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in October
Sumas, WA
- Average rainfall days in October: 17.1 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (7.8 days).
Average snowfall in October
Sumas, WA
- Average snowfall in October: 0"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in October
Sumas, WA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Sumas, WA
- Average daylight in October: 10h and 5min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in October: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in October
Sumas, WA
- Average sunshine days in October: 12.4 days
The months with the most sunshine days are July and August (21 days).
The month with the least sunshine days is March (8.4 days).
Average UV index in October
Sumas, WA
- Average UV index in October: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in October
Sumas, WA
- Average cloud cover in October: 48
The month with the most cloud cover is March (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in October
Sumas, WA
- Average visibility in October: 5mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
Sumas, Washington, USA
Weather forecast for your location
2. Allow the app to use your location