Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September is marked by a decrease in temperature, transitioning from a tropical 88°F (31.1°C) in August to a moderately hot 77.4°F (25.2°C). An average temperature of 56.1°F (13.4°C) is recorded in Othello during the nights in September.Humidity
In Othello, the average relative humidity in September is 43%.Rainfall
In Othello, Washington, during September, the rain falls for 4.2 days and regularly aggregates up to 0.24" (6mm) of precipitation. In Othello, during the entire year, the rain falls for 102 days and collects up to 7.4" (188mm) of precipitation.Snowfall
January through April, September, November and December are months with snowfall. September is the first month it typically snows in Othello. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. In Othello, during the entire year, snow falls for 16.7 days and aggregates up to 6.18" (157mm) of snow.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:17 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:37 pm PDT.
Sunshine
The average sunshine in September is 10.8h.UV index
In September, the average daily maximum UV index in Othello is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
What are September temperatures in Othello?
What is the average humidity in September in Othello?
How much does it rain in Othello in September?
When does it start to snow in Othello?
How many hours of daylight does Othello have in September?
What time are sunrise and sunset in September in Othello?
How many hours of sunshine does Othello have in September?
How high is the UV index in September in Othello?
Average temperature in September
Othello, WA
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is December (35.6°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is August (62.8°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in September
Othello, WA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Othello, WA
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest month (with the lowest average wind speed) is December (5.5mph).
Average humidity in September
Othello, WA
- Average humidity in September: 43%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in September
Othello, WA
- Average rainfall in September: 0.24"
The wettest months (with the highest rainfall) are January and December (0.94").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days in September
Othello, WA
- Average rainfall days in September: 4.2 days
The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is August (3.4 days).
Average snowfall in September
Othello, WA
- Average snowfall in September: 0.08"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in September
Othello, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (5.5 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Othello, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 10h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 18min).
Average sunshine days in September
Othello, WA
- Average sunshine days in September: 24.4 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is March (15 days).
Average UV index in September
Othello, WA
- Average UV index in September: 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 September
Othello, WA
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in September
Othello, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Othello, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
