Flagstaff Weather in September: Temperature, Precipitation, Wind
Flagstaff, Arizona experiences a pleasant and mild climate in September, marking the transition from summer to autumn. The average temperature hovers around 15.4°C (59.8°F), with daytime highs reaching 23.7°C (74.7°F) and nighttime lows dipping to 6.8°C (44.3°F). These temperatures create comfortable conditions for outdoor activities in popular spots like the Flagstaff Arboretum or Walnut Canyon National Monument.
September in Flagstaff boasts clear skies and abundant sunshine. The average cloud cover is a mere 24.7%, allowing for excellent visibility of 15.7 kilometers (9.8 miles). UV index averages 6.9, indicating strong sun intensity. Visitors to the Lowell Observatory benefit from these clear conditions for stargazing.
Precipitation is minimal during September, with an average of only 0.26 mm (0.01 inches) of rainfall. Rain occurs on approximately 9 days of the month, covering 3.9% of the time. The probability of precipitation stands at 30%. Snowfall is non-existent during this period.
Wind patterns in Flagstaff during September are notable. Average wind speeds reach 25.8 km/h (16 mph), with gusts up to 47.1 km/h (29.3 mph). These breezy conditions contribute to the area’s comfortable feel, especially when hiking in the nearby San Francisco Peaks.
Humidity levels remain moderate at 48%, contributing to the pleasant feel of the weather. The average atmospheric pressure is 1016.2 hPa, indicating stable conditions. Sunrise occurs around 6:09 AM, while sunset takes place at approximately 6:33 PM, providing ample daylight hours for exploring Flagstaff’s outdoor attractions.
What is the temperature in Flagstaff in September?
Average air temperature in Flagstaff is 15.4°C (59.8°F) in September. The outside temperature in Flagstaff feels like 15.4°C (59.7°F) on a typical September day. The highest average temperature during sunny days is 23.7°C (74.7°F) and feels like 23.6°C (74.5°F). The lowest average temperature after dark is 6.8°C (44.3°F) which feels like 6.8°C (44.2°F).
How hot is Flagstaff in September?
The hot temperature in September in Flagstaff rises to 28.5°C (83.3°F) on sunny days with low cloud coverage and 48% humidity. During hottest days of September it feels like 27.1 °C (80.8°F). The average maximum temp in Flagstaff is 23.7°C (80.8°F) during day time in September.
How cold is Flagstaff in September?
The coldest temp in Flagstaff in September drops to 1.7°C (35.1°F) during the cold nights. With 25.8km/h (16mph) winds and 48% humidity it feels like 1.7°C (35.1°F) on the coldest nights. The average minimum temperature is 6.8°C (44.3°F) during night time in September.
Does it rain in Flagstaff in September?
Yes, it rains for 9 days in Flagstaff, United States in September averaging 0.26 mm of precipitation. Flagstaff has a 30% chance for rain throughout the entire month of September.
How much does it rain in Flagstaff throughout September?
Flagstaff has 0.26 mm (0.01 inch) of rain per day on average in September. It rains for an average of 9 days out of the entire month.
Is Flagstaff windy in September?
The average speed of wind in Flagstaff, United States during September is 25.8km/h (16mph) and average windgust is 47.1km/h (29.3mph). On some days in September wind can reach up to 47.9km/h (29.8mph).
What is the direction of the wind in Flagstaff in September?
Most days of September the wind is blowing from South-Southwest direction in Flagstaff.
What are the humidity levels in Flagstaff in September?
The average humidity levels in Flagstaff in September are 48%. Daily humidity levels in Flagstaff range from 29.5% to 73.7% during September.
How many hours of daylight are in Flagstaff in September?
Flagstaff has 12 hours 23 minutes of daylight in September on average. Sunset and sunrise times gradually change throughout the month. Sunrise in Flagstaff in September is at 6:09:42 and the sunset is at 18:33:03.
What is the cloud coverage in Flagstaff in September?
Clouds cover 24.7% of the sky on average throughout September in Flagstaff. The cloud coverage ranges from 0% to 82.6% depending on the day of the month.
What is the UV level in September in Flagstaff?
The average UV index in Flagstaff is 6.9 in September. UV levels change throughout the month and range from 3 to 10.
What is the solar radiation in Flagstaff in September?
The average solar radiation is 126.4 W/m2 (Watts per square meter) in Flagstaff during September. However solar radiation levels change throughout the month and range from 60.5 W/m2 to 232 W/m2.
What is the solar energy during September in Flagstaff?
The average solar energy during September in Flagstaff is 10.9 MJ/m2 (megajoules per square metre). Solar energy ranges from 5.2 MJ/m2, to 20.1 MJ/m2 during September.
Are there severe weather risks in Flagstaff in September?
Yes, there is a 10% risk for severe weather in Flagstaff, United States in September.
What is the air pressure in Flagstaff in September?
On average the air pressure in Flagstaff in September is 1016.2 mb (millibars). Throughout the month the sea level pressure ranges from 1008.4 mb to 1020.3 mb.
What is the visibility in Flagstaff in September?
The average daylight visibility in Flagstaff in September is 15.7 km (9.8 miles). Depending on the precipitation the visibility ranges from 11.5 km (7.1 miles) to 16 km (9.9 miles) throughout September.
What is the dew point in Flagstaff in September?
The average dew point in Flagstaff during September is 2.7°C (36.9°F).
Where is the data for Flagstaff climate in September coming from?
The climate data for Flagstaff, Arizona, United States in September is collected from the following weather stations.
- FLAGSTAFF PULLIAM AIRPORT, AZ US
- SEDONA AIRPORT, AZ US
- FLAGSTAFF, AZ US
- N7CEE Flagstaff AZ US
- KCMR
- KFLG
- KSEZ