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
September is marked by a subtle drop in average high-temperatures, transitioning from a warm 78.1°F (25.6°C) in August to an agreeable 70.7°F (21.5°C). The nighttime average for Kalama in September plummets considerably from its daytime counterpart, resting at a chilly 47.8°F (8.8°C).Humidity
The average relative humidity in September is 77%.Rainfall
In Kalama, in September, during 12.1 rainfall days, 2.09" (53mm) of precipitation is typically accumulated. In Kalama, during the entire year, the rain falls for 190.2 days and collects up to 42.48" (1079mm) of precipitation.Snowfall
April through October are months without snowfall in Kalama.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 6:33 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:52 pm PDT.
Sunshine
In Kalama, Washington, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September in Kalama is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Kalama?
What is the average humidity in September in Kalama?
How many days does it rain in September in Kalama?
When it does not snow in Kalama?
What is the average length of the day in September in Kalama?
What time are sunrise and sunset in September in Kalama?
How long on average sun shines in September in Kalama?
What is the UV index reading in September in Kalama?
Average temperature in September
Kalama, WA
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (42.1°F).
- Average low temperature in September: 47.8°F
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (32.5°F).
Average pressure in September
Kalama, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Kalama, WA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in September
Kalama, WA
- Average humidity in September: 77%
The months with the highest relative humidity are February and November (88%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in September
Kalama, WA
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is January (6.34").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in September
Kalama, WA
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is March (21.6 days).
The month with the least rainy days is July (6.7 days).
Average snowfall in September
Kalama, WA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Kalama, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Kalama, WA
- Average daylight in September: 12h and 3min
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 September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 3h and 24min).
Average sunshine days in September
Kalama, WA
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is August (21.3 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Kalama, WA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Kalama, WA
- Average cloud cover in September: 44
The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Kalama, WA
- Average visibility in September: 4mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
Kalama, Washington, USA
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