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 brings a drop in Nighthawk's average high-temperature, falling from a moderately hot 79.2°F (26.2°C) in August to an enjoyable 67.8°F (19.9°C). Nighthawk marks a considerable descent from the daytime apex, as the average temperature dips to a chilly 42.8°F (6°C) at night throughout September.Humidity
In September, the average relative humidity is 60%.Rainfall
In Nighthawk, in September, during 9.6 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. Throughout the year, there are 112.2 rainfall days, and 14.69" (373mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 2.09" (53mm) of snow. In Nighthawk, Washington, during the entire year, snow falls for 89.6 days and aggregates up to 47.44" (1205mm) of snow.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:16 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:38 pm PDT.
Sunshine
The average sunshine in September is 10.4h.UV index
In Nighthawk, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 3 suggests this advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Boost your sun resistance with garments that are densely woven yet spacious. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Nighthawk?
What is the average humidity in September in Nighthawk?
How many days does it rain in September in Nighthawk?
When does it start snowing in Nighthawk?
How many hours of daylight does Nighthawk have in September?
When are sunrise and sunset in September in Nighthawk?
How many hours of sunshine does Nighthawk have in September?
What is the UV index intensity in September in Nighthawk?
Average temperature in September
Nighthawk, WA
- Average high temperature in September: 67.8°F
The warmest month (with the highest average high temperature) is August (79.2°F).
The month with the lowest average high temperature is December (27°F).
- Average low temperature in September: 42.8°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in September
Nighthawk, WA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in September
Nighthawk, WA
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest months (with the lowest average wind speed) are January, February and December (3.7mph).
Average humidity in September
Nighthawk, WA
- Average humidity in September: 60%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Nighthawk, WA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is August (0.47").
Average rainfall days in September
Nighthawk, WA
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is December (5.7 days).
Average snowfall in September
Nighthawk, WA
- Average snowfall in September: 2.09"
The month with the highest snowfall is December (9.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Nighthawk, WA
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Nighthawk, WA
- Average daylight in September: 12h and 4min
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 September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Nighthawk, WA
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is March (10.8 days).
Average UV index in September
Nighthawk, WA
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Nighthawk, WA
- Average cloud cover in September: 23
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Nighthawk, WA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
Nighthawk, Washington, USA
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