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
Pasco's weather in September involves a decrease in the average high-temperature, moving down from August's tropical 89.1°F (31.7°C) to a warm 77.9°F (25.5°C). In Pasco, the expected average low-temperature for September is a refreshing 57.2°F (14°C).Humidity
In September, the average relative humidity in Pasco, Washington, is 43%.Rainfall
In Pasco, in September, it is raining for 4.7 days, with typically 0.28" (7mm) of accumulated precipitation. Throughout the year, there are 101.7 rainfall days, and 7.36" (187mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Pasco.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:34 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:37 pm PDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
In Pasco, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What is the usual temperature for Pasco in September?
What is the average humidity in September in Pasco?
How much does it rain in Pasco in September?
When it does not snow in Pasco?
How many hours of daylight does Pasco have in September?
What time are sunrise and sunset in September in Pasco?
How many hours of sunshine does Pasco have in September?
What is the UV index intensity in September in Pasco?
Average temperature in September
Pasco, WA
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is December (37.8°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (27.7°F).
Average pressure in September
Pasco, WA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in September
Pasco, WA
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (8.4mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).
Average humidity in September
Pasco, WA
- Average humidity in September: 43%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (35%).
Average rainfall in September
Pasco, WA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is January (0.94").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Pasco, WA
- Average rainfall days in September: 4.7 days
The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (3.5 days).
Average snowfall in September
Pasco, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Pasco, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Pasco, 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: 10h and 4min
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 September
Pasco, WA
- Average sunshine days in September: 23.5 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (14.7 days).
Average UV index in September
Pasco, 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
Pasco, WA
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Pasco, WA
- Average visibility in September: 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).
Pasco, Washington, USA
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